Pristine phase change materials(PCMs)suffer from inherent deficiencies of poor solar absorption and photothermal conversion.Herein,we proposed a strategy of co-incorporation of zero-dimensional(OD)metal nanoparticles ...Pristine phase change materials(PCMs)suffer from inherent deficiencies of poor solar absorption and photothermal conversion.Herein,we proposed a strategy of co-incorporation of zero-dimensional(OD)metal nanoparticles and two-dimensional(2D)photothermal materials in PCMs for efficient capture and conversion of solar energy into thermal energy.Highly scattered Co-anchored MoS_(2)nanoflower cluster serving as photon and phonon triggers was prepared by in-situ hydrothermal growth of ZIF67 polyhedron on 2D MoS_(2)and subsequent high-temperature carbonization.After encapsulating thermal storage unit(paraffin wax),the obtained composite PCMs integrated high-performance photothermal conversion and thermal energy storage capability.Benefiting from the synergistic enhancement of OD Co nanoparticles with localized surface plasmon resonance effect,carbon layer with the conjugation effect and 2D MoS_(2)with strong solar absorption,composite PCMs exhibited a high photothermal conversion efficiency of 95.19%,Additionally,the resulting composite PCMs also demonstrated long-term thermal sto rage stability and durable structu ral stability after 300 thermal cycles.The proposed collabo rative co-incorporation strategy provides some innovative references for developing next-generation photothermal PCMs in solar energy utilization.展开更多
Puerarin, a traditional Chinese medicine, exerts a powerful neuroprotective effect in cerebral ischemia/reperfusion injury, but its mechanism is unknown. Here, we established rat models of middle cerebral artery ische...Puerarin, a traditional Chinese medicine, exerts a powerful neuroprotective effect in cerebral ischemia/reperfusion injury, but its mechanism is unknown. Here, we established rat models of middle cerebral artery ischemia/reperfusion injury using the suture method. Puerarin (100 mg/kg) was administered intraperitoneally 30 minutes before middle cerebral artery occlusion and 8 hours after reperfusion. Twenty-four hours after reperfusion, we found that puerarin significantly improved neurological deficit, reduced infarct size and brain water content, and notably diminished the expression of Toll-like receptor-4, myeloid differentiation factor 88, nuclear factor kappa B and tumor necrosis factor-α in the ischemic region. These data indicate that puerarin exerts an anti-inflammatory protective effect on brain tissue with ischemia/reperfusion damage by downregulating the expression of multiple inflammatory factors.展开更多
Extensive use of thermal energy in daily life is ideal for reducing carbon emissions to achieve carbon neutrality;however,the effective collection of thermal energy is a major hurdle.Thermoelectric(TE)conversion techn...Extensive use of thermal energy in daily life is ideal for reducing carbon emissions to achieve carbon neutrality;however,the effective collection of thermal energy is a major hurdle.Thermoelectric(TE)conversion technology based on the Seebeck effect and thermal energy storage technology based on phase change materials(PCMs)represent smart,feasible,and research-worthy approaches to overcome this hurdle.However,the integration of multiple thermal energy sources freely existing in the environment for storage and output of thermal and electrical energy simultaneously still remains a huge challenge.Herein,three-dimensional(3D)nanostructured metal-organic frameworks(MOFs)are in situ nucleated and grown onto carbon nanotubes(CNTs)via coordination bonding.After calcination,the prepared core-shell structural CNTs@MOFs are transformed into tightened 1D/3D carbon heterostructure loading Co nanoparticles for efficient solar-thermoelectric energy harvesting.Surprisingly,the corresponding composite PCMs show a record-breaking solar-thermal conversion efficiency of 98.1%due to the tightened carbon heterostructure and the local surface plasmon resonance effect of Co nanoparticles.Moreover,our designed all-in-one composite PCMs are also capable of creating an electrical potential of 0.5 mV based on the Seebeck effect without a TE generator.This promising approach can store thermal and electrical energy simultaneously,providing a new direction in the design of advanced all-in-one multifunctional PCMs for thermal energy storage and utilization.展开更多
The laser-induced porous graphene(LIG)prepared in a straightforward fabrication method is presented,and its applications in stretchable strain sensors to detect the applied strain are also explored.The LIGformed on th...The laser-induced porous graphene(LIG)prepared in a straightforward fabrication method is presented,and its applications in stretchable strain sensors to detect the applied strain are also explored.The LIGformed on the polyimide/polydimethylsiloxane(PI/PDMS)composite exhibits a naturally high stretchabil-ity(over 30%),bypassing the transfer printing process compared to the one prepared by laser scribing onPI films.The PI/PDMS composite with LIG shows tunable mechanical and electronic performances withdifferent PI particle concentrations in PDMS.The good cyclic stability and almost linear response of theprepared LIG’s resistance with respect to tensile strain provide its access to wearable electronics.To im-prove the PDMS/PI composite stretchability,we designed and optimized a kirigami-inspired strain sensorwith LIG on the top surface,dramatically increasing the maximum strain value that in linear response toapplied strain from 3%to 79%.展开更多
Developing advanced nanocomposite integrating solar-driven thermal energy storage and thermal management functional microwave absorption can facilitate the cutting-edge application of phase change materials(PCMs).To c...Developing advanced nanocomposite integrating solar-driven thermal energy storage and thermal management functional microwave absorption can facilitate the cutting-edge application of phase change materials(PCMs).To conquer this goal,herein,two-dimensional MoS_(2) nanosheets are grown in situ on the surface of one-dimensional CNTs to prepare core-sheath MoS_(2)@CNTs for the encapsulation of paraffin wax(PW).Benefiting from the synergistic enhancement photothermal effect of MoS_(2) and CNTs,MoS_(2)@CNTs is capable of efficiently trapping photons and quickly transporting phonons,thus yielding a high solar-thermal energy conversion and storage efficiency of 94.97%.Meanwhile,PW/MoS_(2)@CNTs composite PCMs exhibit a high phase change enthalpy of 101.60 J/g and excellent lo ng-term thermal storage durability after undergoing multiple heating-cooling cycles.More attractively,PW/MoS_(2)@CNTs composite PCMs realize thermal management functional microwave absorption in heat-related electronic application scenarios,which is superior to the single microwave absorption of traditional materials.The minimum reflection loss(RL) for PW/MoS_(2)@CNTs is-28 dB at 12.91 GHz with a 2.0 mm thickness.This functional integration design provides some insightful references on developing advanced microwave absorbing composite PCMs,holding great potential towards high-efficiency solar energy utilization and thermally managed microwave absorption fields.展开更多
In this paper a label-based simultaneous localization and mapping( SLAM) system is proposed to provide localization to indoor autonomous robots. In the system quick response( QR) codes encoded with serial numbers ...In this paper a label-based simultaneous localization and mapping( SLAM) system is proposed to provide localization to indoor autonomous robots. In the system quick response( QR) codes encoded with serial numbers are utilized as labels. These labels are captured by two webcams,then the distances and angles between the labels and webcams are computed. Motion estimated from the two rear wheel encoders is adjusted by observing QR codes. Our system uses the extended Kalman filter( EKF) for the back-end state estimation. The number of deployed labels controls the state estimation dimension. The label-based EKF-SLAM system eliminates complicated processes,such as data association and loop closure detection in traditional feature-based visual SLAM systems. Our experiments include software-simulation and robot-platform test in a real environment. Results demonstrate that the system has the capability of correcting accumulated errors of dead reckoning and therefore has the advantage of superior precision.展开更多
The iron-chalcogenide superconductor FeTe_(1-x)Se_(x) displays a variety of exotic features distinct from iron pnictides.Although much effort has been devoted to understanding the interplay between magnetism and super...The iron-chalcogenide superconductor FeTe_(1-x)Se_(x) displays a variety of exotic features distinct from iron pnictides.Although much effort has been devoted to understanding the interplay between magnetism and superconductivity near x=0.5,the existence of a spin glass phase with short-range magnetic order in the doping range(x~0.1-0.3)has rarely been studied.Here,we use DC/AC magnetization and(quasi)elastic neutron scattering to confirm the spin-glass nature of the short-range magnetic order in a Fe_(1.07)Te_(0.8)Se_(0.2) sample.The AC-frequency dependent spin-freezing temperature T_(f) generates a frequency sensitivityΔT_(f)(ω)/[T_(f)(ω)Δlog_(10)ω]≈0.028 and the description of the critical slowing down withτ=τ0(T_(f)/T_(SG-1))^(-zv) gives T_(SG)≈22 K and zv≈10,comparable to that of a classical spin-glass system.We have also extended the frequency-dependent T_(f) to the smaller time scale using energy-resolution-dependent neutron diffraction measurements,in which the T_(N) of the short-range magnetic order increases systematically with increasing energy resolution.By removing the excess iron through annealing in oxygen,the spin-freezing behavior disappears,and bulk superconductivity is realized.Thus,the excess Fe is the driving force for the formation of the spin-glass phase detrimental to bulk superconductivity.展开更多
Neither pristine phase change materials(PCMs)nor metal-organic frame-works(MOFs)can be driven by optical/electrical/magnetic triggers for multiple energy conversion and thermal storage,which cannot satisfy the require...Neither pristine phase change materials(PCMs)nor metal-organic frame-works(MOFs)can be driven by optical/electrical/magnetic triggers for multiple energy conversion and thermal storage,which cannot satisfy the requirements of multi-scenario applications.Herein,a three-dimensional interconnected forest-type array carbon network anchored by Co nanoparticles serving as optical/electrical/magnetic multimode triggers was developed through in situ growth of two-dimensional MOF nanosheet arrays on pre-carbonized melamine foam and subsequent high-temperature carbonization.After the encapsulation of polyethylene glycol,the resulting composite PCMs simultaneously integrate fascinating photothermal,electrothermal,magnetothermal conversion and stor-age for personal thermotherapy.Benefiting from the synergistic enhancement of forest-type array carbon heterostructure and Co nanoparticles,composite PCMs exhibit high thermal/electrical conduction and strong full-spectrum absorption capacities.Resultantly,low-energy photoelectric triggers are sufficient to drive high-efficiency photothermal/electrothermal conversion and storage of compos-ite PCMs(93.1%,100 mW/cm^(2);92.9%,2.5 V).Additionally,composite PCMs also exhibit excellent encapsulation stability without liquid phase leakage,long-term thermal reliability and multiple energy conversion and storage stability after multiple cycles.The proposed photoelectromagnetic multimode triggers are aimed to inspire innovation and accelerate major breakthroughs in advanced responsive composite PCMs toward multiple energy utilization and personal thermotherapy.展开更多
Psoriasis is a chronic inflammatory skin disease featuring rapid proliferation of epidermal cells.Although elevated glycolysis flux has been reported in psoriasis,the molecular mechanisms underlying its pathogenesis r...Psoriasis is a chronic inflammatory skin disease featuring rapid proliferation of epidermal cells.Although elevated glycolysis flux has been reported in psoriasis,the molecular mechanisms underlying its pathogenesis remain unclear.We investigated the role of the integral membrane protein CD147 in psoriasis pathogenesis,observing its high expression in psoriatic skin lesions of humans and imiquimod(IMQ)-induced mouse models.In mouse models,genomic deletion of epidermal CD147 markedly attenuated IMQ-induced psoriatic inflammation.We found that CD147 interacted with glucose transporter 1(Glut1).Depletion of CD147 in the epidermis blocked glucose uptake and glycolysis in vitro and in vivo.In CD147-knockout mice and keratinocytes,oxidative phosphorylation was increased in the epidermis,indicating CD147's pivotal role in glycolysis reprogramming during pathogenesis of psoriasis.Using non-targeted and targeted metabolic techniques,we found that epidermal deletion of CD147 significantly increased the production of carnitine and α-ketoglutaric acid(α-KG).展开更多
In response to the rapid development of highly integrated multifunctional electronic devices,developing advanced multifunctional composite phase change materials(PCMs)that integrate thermal management,solar-thermal co...In response to the rapid development of highly integrated multifunctional electronic devices,developing advanced multifunctional composite phase change materials(PCMs)that integrate thermal management,solar-thermal conversion and microwave absorption has become increasingly essential.Herein,we propose a bionical strategy to design neural network-like(carbon nanofiber)CNF@Co/C aerogels by growing ZIF-67 in situ on bacterial cellulose(BC)and subsequent calcination strategies.After the encapsulation of thermal storage unit(paraffin wax,PW),the obtained multifunctional composite PCMs(PW-CNF@Co/C aerogel)are composed of“soma”(Co/C polyhedra),“axon”(porous CNF)and thermal storage unit(PW).Importantly,the composite PCMs show a high solar-thermal conversion efficiency of 95.27%benefiting from the synergism of“soma”with strong local surface plasmon resonance(LSPR)effect and“axon”with enhanced photon transmission path.More attractively,the composite PCMs also display good microwave absorption capacity with a minimum reflection loss(RL)of-26.8 dB at 10.91 GHz owing to the synergy of magnetic and dielectric components along with abundant polarization and multiple reflections.Our developed functionally integrated composite PCMs provide a prospective application of highly integrated and miniaturized electronic devices in complex and changeable outdoor environments.展开更多
Advanced multifunctional composite phase change materials(PCMs)for integrating energy storage,photothermal conversion and microwave absorption can promote the development of next-generation miniaturized electronic dev...Advanced multifunctional composite phase change materials(PCMs)for integrating energy storage,photothermal conversion and microwave absorption can promote the development of next-generation miniaturized electronic devices.Here,we report paraffin wax(PW)-based multifunctional composite PCMs with a hierarchical network structure assembled by two‐dimensional(2D)nickel-based metal-organic frameworks(Ni-MOFs)decorated carbon nanotubes(CNTs).The PW/CNTs@Ni-MOF composite PCMs yield an excellent photothermal energy conversion efficiency of 93.2%,as well as a good phase change enthalpy of 126.5 J/g and prominent thermal stability.Preferably,the composite PCMs also present great microwave absorption with-25.32 dB minimum reflection loss(RLmin)at 9.85 GHz.The remarkable features of the composite PCMs lie in their hierarchical network architecture and the synergistic enhancement of CNTs and MOFs,giving rise to the increased surface area,accelerated photon capture and transmission,and enhanced dielectric loss caused by polarization effects and multiple reflections,thus further boosting the latent energy storage capacity,photothermal kinetics,and microwave reflection loss.This work provides a facile and scalable approach to regulating the multifunction of composite PCMs.展开更多
Advanced multifunctional composite phase change materials(PCMs)integrating dual-field excitative thermal storage and microwave absorption have been recently highlighted in cutting-edge applications.Herein,we designed ...Advanced multifunctional composite phase change materials(PCMs)integrating dual-field excitative thermal storage and microwave absorption have been recently highlighted in cutting-edge applications.Herein,we designed a metal–organic framework(MOF)derived magnetic NiCo-modified open carbon microcage(NiCo@C)for the encapsulation of PCMs,which simultaneously achieve fast-response multienergy capture and bimode stealth functions:The NiCo@C/PW composite PCMs exhibited a relatively high phase change enthalpy of 130.39 J/g due to the high cavity volume of the NiCo@C microcage.Strikingly,the composite PCMs demonstrated excellent solar-thermal conversion,attributed to the local surface plasmon resonance effect of NiCo nanoparticles and full-spectrum absorption of high graphitized carbon microcage.Simultaneously,composite PCMs harvested high-efficiency magnetic-thermal conversion due to the Néel and Brownian relaxation effects of diffusely embedded magnetic NiCo nanoparticles.More importantly,this thermal energy storage system achieved high-performance microwave absorption with a minimum reflection loss(RL)of−38.1 dB at 11.8 GHz at only 2.35 mm thickness.Our designed all-in-one strategy created an innovative platform for constructing advanced multifunctional microwave-absorbing composite PCMs with thermal storage,dual-energy conversion,microwave absorption,and infrared stealth.展开更多
Advanced natural killer/T cell lymphoma(NKTL)has demonstrated poor prognosis with currently available therapies.Here,we report the efficacy of anti-programmed death 1(PD-1)antibody with the P-GEMOX(pegaspargase,gemcit...Advanced natural killer/T cell lymphoma(NKTL)has demonstrated poor prognosis with currently available therapies.Here,we report the efficacy of anti-programmed death 1(PD-1)antibody with the P-GEMOX(pegaspargase,gemcitabine,and oxaliplatin)regimen in advanced NKTL.Nine patients underwent six 21-day cycles of anti-PD-1 antibody(day 1),pegaspargase 2000 U/m^(2)(day 1),gemcitabine 1 g/m^(2)(days 1 and 8)and oxaliplatin 130 mg/m^(2)(day 1),followed by anti-PD-1 antibody maintenance every 3 weeks.Programmed death-ligand 1(PD-L1)expression and genetic alterations were determined in paraffin-embedded pretreatment tissue samples using immunohistochemistry and next-generation sequencing(NGS)analysis.Responses were assessed using 18F-fluorodeoxyglucose positron emission tomography(18FDG-PET)and computed tomography or magnetic resonance imaging.Eight patients exhibited significant responses,comprising of seven complete remissions and one partial remission(overall response rate:88.9%).After a median follow-up of 10.6 months,6/9 patients(66.7%)remained in complete remission.The most common grade 3/4 adverse events were anemia(33.3%),neutropenia(33.3%),and thrombocytopenia(33.3%);all of which were manageable and resolved.Immunochemotherapy produced a high response rate in patients with positive PD-L1 expression(5/6,83.3%).NGS analysis suggested that STAT3/JAK3/PD-L1 alterations and ARID1A mutation were associated with immunochemotherapy efficacy.Mutation in DDX3X and alteration in epigenetic modifiers of KMT2D,TET2,and BCORL1 might indicate a poor response to immunochemotherapy.In conclusion,the anti-PD-1 antibody plus P-GEMOX regimen demonstrated promising efficacy in advanced NKTL.PD-L1 expression combined with specific genetic alterations could be used as potential biomarkers to predict therapeutic responses to immunochemotherapy.展开更多
Bacterial prodigiosins are red-colored secondary metabolites with multiple activities,such as anticancer,antimalarial and immunosuppressive,which hold great potential for medical applications.In this study,dramaticall...Bacterial prodigiosins are red-colored secondary metabolites with multiple activities,such as anticancer,antimalarial and immunosuppressive,which hold great potential for medical applications.In this study,dramatically enhanced prodigiosins(RED) production in Streptomyces coelicolor was achieved by combinatorial metabolic engineering,including inactivation of the repressor gene ohkA,deletion of the actinorhodin(ACT) and calcium-dependent antibiotic(CDA) biosynthetic gene clusters(BGCs) and multi-copy chromosomal integration of the RED BGC.The results showed that ohkA deletion led to a 1-fold increase of RED production over the wild-type strain M145.Then,the ACT and CDA BGCs were deleted successively based on the AohkA mutant(SBJ101).To achieve multi-copy RED BGC integration,artificial ΦC31 attB site(s) were inserted simultaneously at the position where the ACT and CDA BGCs were deleted.The resulting strains SBJ102(with a single deletion of the ACT BGC and insertion of one artificial attB site) and SBJ103(with the deletion of both BGCs and insertion of two artificial attB sites) produced 1.9-and 6-fold higher RED titers than M145,respectively.Finally,the entire RED BGC was introduced into mutants from SBJ101 to SBJ103,generating three mutants(from SBJ104 to SBJ106) with chromosomal integration of one to three copies of the RED BGC.The highest RED yield was from SBJ106,which produced a maximum level of 96.8 mg g^(-1) cell dry weight,showing a 12-fold increase relative to M145.Collectively,the metabolic engineering strategies employed in this study are very efficient for the construction of high prodigiosin-producing strains.展开更多
The one-step fabricated laser-induced graphene(LIG)has the advantages of low cost,patterning of various desired geometries,and high sensitivity.However,the robustness of substrates imposes certain constraints on their...The one-step fabricated laser-induced graphene(LIG)has the advantages of low cost,patterning of various desired geometries,and high sensitivity.However,the robustness of substrates imposes certain constraints on their applications in stretchable devices.In this paper,the substrate composed of polydimethylsiloxane(PDMS)and polyimide(PI)particles is proposed to serve as the platform to manufacture LIG.Ascribing to the inherent soft and stretchable attributes of the PI/PDMS composite substrate,the LIG based sensors can fit complex 3D configurations or bear a mechanical tension over 15%.Notably,the fluence of the laser is experimentally and theoretically determined as the only principle to characterize the formation of conductive LIG on PI/PDMS composite greatly facilitating the selection of the allowable laser scanning parameters to form the desired LIG-based devices.Three demonstrations are conducted to highlight the superiority and the potential of this soft and stretchable LIG-based system in wearable electronics and soft robots.展开更多
Dear Editor,Psoriasis is a common immune mediated,chronic inflammatory skin disease,which has been characterized by epidermal acanthosis,hyperkeratosis,parakeratosis and extensive infiltration of inflammatory cell.KCs...Dear Editor,Psoriasis is a common immune mediated,chronic inflammatory skin disease,which has been characterized by epidermal acanthosis,hyperkeratosis,parakeratosis and extensive infiltration of inflammatory cell.KCs have critical roles in skin innate and adaptive immune responses during the development of psoriasis,which produce large amounts of inflammatory mediators,such as antimicrobial peptides(e.g.,S100A8,9),proinflammatory cytokines(e.g,IL-6,IL-17A,C,TNF-α,)and chemokines(e.g,CXCL1,2),triggering innate or adaptive immune responses.展开更多
基金financially supported by National Natural Science Foundation of China(No.51902025)。
文摘Pristine phase change materials(PCMs)suffer from inherent deficiencies of poor solar absorption and photothermal conversion.Herein,we proposed a strategy of co-incorporation of zero-dimensional(OD)metal nanoparticles and two-dimensional(2D)photothermal materials in PCMs for efficient capture and conversion of solar energy into thermal energy.Highly scattered Co-anchored MoS_(2)nanoflower cluster serving as photon and phonon triggers was prepared by in-situ hydrothermal growth of ZIF67 polyhedron on 2D MoS_(2)and subsequent high-temperature carbonization.After encapsulating thermal storage unit(paraffin wax),the obtained composite PCMs integrated high-performance photothermal conversion and thermal energy storage capability.Benefiting from the synergistic enhancement of OD Co nanoparticles with localized surface plasmon resonance effect,carbon layer with the conjugation effect and 2D MoS_(2)with strong solar absorption,composite PCMs exhibited a high photothermal conversion efficiency of 95.19%,Additionally,the resulting composite PCMs also demonstrated long-term thermal sto rage stability and durable structu ral stability after 300 thermal cycles.The proposed collabo rative co-incorporation strategy provides some innovative references for developing next-generation photothermal PCMs in solar energy utilization.
基金supported by the Chinese Traditional Medical Science Foundation of Zhejiang Province in China,No.2010ZA072the Health Bureau Foundation of Zhejiang Province in China,No.2012ZDA023the Qianjiang Project of Zhejiang Science and Technology Bureau in China,No.2010 R10073
文摘Puerarin, a traditional Chinese medicine, exerts a powerful neuroprotective effect in cerebral ischemia/reperfusion injury, but its mechanism is unknown. Here, we established rat models of middle cerebral artery ischemia/reperfusion injury using the suture method. Puerarin (100 mg/kg) was administered intraperitoneally 30 minutes before middle cerebral artery occlusion and 8 hours after reperfusion. Twenty-four hours after reperfusion, we found that puerarin significantly improved neurological deficit, reduced infarct size and brain water content, and notably diminished the expression of Toll-like receptor-4, myeloid differentiation factor 88, nuclear factor kappa B and tumor necrosis factor-α in the ischemic region. These data indicate that puerarin exerts an anti-inflammatory protective effect on brain tissue with ischemia/reperfusion damage by downregulating the expression of multiple inflammatory factors.
基金National Natural Science Foundation of China,Grant/Award Number:51902025Fundamental Research Funds for the Central Universities,Grant/Award Numbers:2019NTST29,FRF-BD-20-07A+1 种基金China Postdoctoral Science Foundation,Grant/Award Numbers:2019M660520,2020T130060Scientific and Technological Innovation Foundation of Shunde Graduate School,University of Science and Technology Beijing,Grant/Award Number:BK20AE003。
文摘Extensive use of thermal energy in daily life is ideal for reducing carbon emissions to achieve carbon neutrality;however,the effective collection of thermal energy is a major hurdle.Thermoelectric(TE)conversion technology based on the Seebeck effect and thermal energy storage technology based on phase change materials(PCMs)represent smart,feasible,and research-worthy approaches to overcome this hurdle.However,the integration of multiple thermal energy sources freely existing in the environment for storage and output of thermal and electrical energy simultaneously still remains a huge challenge.Herein,three-dimensional(3D)nanostructured metal-organic frameworks(MOFs)are in situ nucleated and grown onto carbon nanotubes(CNTs)via coordination bonding.After calcination,the prepared core-shell structural CNTs@MOFs are transformed into tightened 1D/3D carbon heterostructure loading Co nanoparticles for efficient solar-thermoelectric energy harvesting.Surprisingly,the corresponding composite PCMs show a record-breaking solar-thermal conversion efficiency of 98.1%due to the tightened carbon heterostructure and the local surface plasmon resonance effect of Co nanoparticles.Moreover,our designed all-in-one composite PCMs are also capable of creating an electrical potential of 0.5 mV based on the Seebeck effect without a TE generator.This promising approach can store thermal and electrical energy simultaneously,providing a new direction in the design of advanced all-in-one multifunctional PCMs for thermal energy storage and utilization.
基金from the National Natural ScienceFoundation of China(Grant No.12072030).
文摘The laser-induced porous graphene(LIG)prepared in a straightforward fabrication method is presented,and its applications in stretchable strain sensors to detect the applied strain are also explored.The LIGformed on the polyimide/polydimethylsiloxane(PI/PDMS)composite exhibits a naturally high stretchabil-ity(over 30%),bypassing the transfer printing process compared to the one prepared by laser scribing onPI films.The PI/PDMS composite with LIG shows tunable mechanical and electronic performances withdifferent PI particle concentrations in PDMS.The good cyclic stability and almost linear response of theprepared LIG’s resistance with respect to tensile strain provide its access to wearable electronics.To im-prove the PDMS/PI composite stretchability,we designed and optimized a kirigami-inspired strain sensorwith LIG on the top surface,dramatically increasing the maximum strain value that in linear response toapplied strain from 3%to 79%.
基金supported by the National Natural Science Foundation of China (51902025)China Postdoctoral Science Foundation (2020T130060 and 2019M660520)。
文摘Developing advanced nanocomposite integrating solar-driven thermal energy storage and thermal management functional microwave absorption can facilitate the cutting-edge application of phase change materials(PCMs).To conquer this goal,herein,two-dimensional MoS_(2) nanosheets are grown in situ on the surface of one-dimensional CNTs to prepare core-sheath MoS_(2)@CNTs for the encapsulation of paraffin wax(PW).Benefiting from the synergistic enhancement photothermal effect of MoS_(2) and CNTs,MoS_(2)@CNTs is capable of efficiently trapping photons and quickly transporting phonons,thus yielding a high solar-thermal energy conversion and storage efficiency of 94.97%.Meanwhile,PW/MoS_(2)@CNTs composite PCMs exhibit a high phase change enthalpy of 101.60 J/g and excellent lo ng-term thermal storage durability after undergoing multiple heating-cooling cycles.More attractively,PW/MoS_(2)@CNTs composite PCMs realize thermal management functional microwave absorption in heat-related electronic application scenarios,which is superior to the single microwave absorption of traditional materials.The minimum reflection loss(RL) for PW/MoS_(2)@CNTs is-28 dB at 12.91 GHz with a 2.0 mm thickness.This functional integration design provides some insightful references on developing advanced microwave absorbing composite PCMs,holding great potential towards high-efficiency solar energy utilization and thermally managed microwave absorption fields.
基金Supported by Program for Changjiang Scholars and Innovative Research Team in University,National Science Foundation of China(61105092)the National Natural Science Foundation of China(61473042)
文摘In this paper a label-based simultaneous localization and mapping( SLAM) system is proposed to provide localization to indoor autonomous robots. In the system quick response( QR) codes encoded with serial numbers are utilized as labels. These labels are captured by two webcams,then the distances and angles between the labels and webcams are computed. Motion estimated from the two rear wheel encoders is adjusted by observing QR codes. Our system uses the extended Kalman filter( EKF) for the back-end state estimation. The number of deployed labels controls the state estimation dimension. The label-based EKF-SLAM system eliminates complicated processes,such as data association and loop closure detection in traditional feature-based visual SLAM systems. Our experiments include software-simulation and robot-platform test in a real environment. Results demonstrate that the system has the capability of correcting accumulated errors of dead reckoning and therefore has the advantage of superior precision.
基金Beijing Normal University is supported by the National Natural Science Foundation of China (Grant Nos. 11734002 and 11922402, X.L.)supported by the US Department of Energy (DOE),Basic Energy Sciences (BES),under Contract No. DE-SC0012311 (P.D.)
文摘The iron-chalcogenide superconductor FeTe_(1-x)Se_(x) displays a variety of exotic features distinct from iron pnictides.Although much effort has been devoted to understanding the interplay between magnetism and superconductivity near x=0.5,the existence of a spin glass phase with short-range magnetic order in the doping range(x~0.1-0.3)has rarely been studied.Here,we use DC/AC magnetization and(quasi)elastic neutron scattering to confirm the spin-glass nature of the short-range magnetic order in a Fe_(1.07)Te_(0.8)Se_(0.2) sample.The AC-frequency dependent spin-freezing temperature T_(f) generates a frequency sensitivityΔT_(f)(ω)/[T_(f)(ω)Δlog_(10)ω]≈0.028 and the description of the critical slowing down withτ=τ0(T_(f)/T_(SG-1))^(-zv) gives T_(SG)≈22 K and zv≈10,comparable to that of a classical spin-glass system.We have also extended the frequency-dependent T_(f) to the smaller time scale using energy-resolution-dependent neutron diffraction measurements,in which the T_(N) of the short-range magnetic order increases systematically with increasing energy resolution.By removing the excess iron through annealing in oxygen,the spin-freezing behavior disappears,and bulk superconductivity is realized.Thus,the excess Fe is the driving force for the formation of the spin-glass phase detrimental to bulk superconductivity.
基金National Natural Science Foundation of China,Grant/Award Number:51902025。
文摘Neither pristine phase change materials(PCMs)nor metal-organic frame-works(MOFs)can be driven by optical/electrical/magnetic triggers for multiple energy conversion and thermal storage,which cannot satisfy the requirements of multi-scenario applications.Herein,a three-dimensional interconnected forest-type array carbon network anchored by Co nanoparticles serving as optical/electrical/magnetic multimode triggers was developed through in situ growth of two-dimensional MOF nanosheet arrays on pre-carbonized melamine foam and subsequent high-temperature carbonization.After the encapsulation of polyethylene glycol,the resulting composite PCMs simultaneously integrate fascinating photothermal,electrothermal,magnetothermal conversion and stor-age for personal thermotherapy.Benefiting from the synergistic enhancement of forest-type array carbon heterostructure and Co nanoparticles,composite PCMs exhibit high thermal/electrical conduction and strong full-spectrum absorption capacities.Resultantly,low-energy photoelectric triggers are sufficient to drive high-efficiency photothermal/electrothermal conversion and storage of compos-ite PCMs(93.1%,100 mW/cm^(2);92.9%,2.5 V).Additionally,composite PCMs also exhibit excellent encapsulation stability without liquid phase leakage,long-term thermal reliability and multiple energy conversion and storage stability after multiple cycles.The proposed photoelectromagnetic multimode triggers are aimed to inspire innovation and accelerate major breakthroughs in advanced responsive composite PCMs toward multiple energy utilization and personal thermotherapy.
基金National Natural Science Grant Nos.82073458,82221002,82130090,81830096,81974476,and 82173424the Science and Technology Innovation Program of Hunan Province(2021RC4013)the Program of Introducing Talents of Discipline to Universities(111 Project,No.B20017).
文摘Psoriasis is a chronic inflammatory skin disease featuring rapid proliferation of epidermal cells.Although elevated glycolysis flux has been reported in psoriasis,the molecular mechanisms underlying its pathogenesis remain unclear.We investigated the role of the integral membrane protein CD147 in psoriasis pathogenesis,observing its high expression in psoriatic skin lesions of humans and imiquimod(IMQ)-induced mouse models.In mouse models,genomic deletion of epidermal CD147 markedly attenuated IMQ-induced psoriatic inflammation.We found that CD147 interacted with glucose transporter 1(Glut1).Depletion of CD147 in the epidermis blocked glucose uptake and glycolysis in vitro and in vivo.In CD147-knockout mice and keratinocytes,oxidative phosphorylation was increased in the epidermis,indicating CD147's pivotal role in glycolysis reprogramming during pathogenesis of psoriasis.Using non-targeted and targeted metabolic techniques,we found that epidermal deletion of CD147 significantly increased the production of carnitine and α-ketoglutaric acid(α-KG).
基金supported by the National Natural Science Foundation of China(No.51902025).
文摘In response to the rapid development of highly integrated multifunctional electronic devices,developing advanced multifunctional composite phase change materials(PCMs)that integrate thermal management,solar-thermal conversion and microwave absorption has become increasingly essential.Herein,we propose a bionical strategy to design neural network-like(carbon nanofiber)CNF@Co/C aerogels by growing ZIF-67 in situ on bacterial cellulose(BC)and subsequent calcination strategies.After the encapsulation of thermal storage unit(paraffin wax,PW),the obtained multifunctional composite PCMs(PW-CNF@Co/C aerogel)are composed of“soma”(Co/C polyhedra),“axon”(porous CNF)and thermal storage unit(PW).Importantly,the composite PCMs show a high solar-thermal conversion efficiency of 95.27%benefiting from the synergism of“soma”with strong local surface plasmon resonance(LSPR)effect and“axon”with enhanced photon transmission path.More attractively,the composite PCMs also display good microwave absorption capacity with a minimum reflection loss(RL)of-26.8 dB at 10.91 GHz owing to the synergy of magnetic and dielectric components along with abundant polarization and multiple reflections.Our developed functionally integrated composite PCMs provide a prospective application of highly integrated and miniaturized electronic devices in complex and changeable outdoor environments.
基金supported by the Beijing Natural Science Foundation(No.2232053)the National Natural Science Foundation of China(No.52002029)+1 种基金Natural Science Foundation of Guangdong Province(No.2022A1515011918)Scientific and Technological Innovation Foundation of Shunde Graduate School,University of Science and Technology Beijing(No.BK20AE003).
文摘Advanced multifunctional composite phase change materials(PCMs)for integrating energy storage,photothermal conversion and microwave absorption can promote the development of next-generation miniaturized electronic devices.Here,we report paraffin wax(PW)-based multifunctional composite PCMs with a hierarchical network structure assembled by two‐dimensional(2D)nickel-based metal-organic frameworks(Ni-MOFs)decorated carbon nanotubes(CNTs).The PW/CNTs@Ni-MOF composite PCMs yield an excellent photothermal energy conversion efficiency of 93.2%,as well as a good phase change enthalpy of 126.5 J/g and prominent thermal stability.Preferably,the composite PCMs also present great microwave absorption with-25.32 dB minimum reflection loss(RLmin)at 9.85 GHz.The remarkable features of the composite PCMs lie in their hierarchical network architecture and the synergistic enhancement of CNTs and MOFs,giving rise to the increased surface area,accelerated photon capture and transmission,and enhanced dielectric loss caused by polarization effects and multiple reflections,thus further boosting the latent energy storage capacity,photothermal kinetics,and microwave reflection loss.This work provides a facile and scalable approach to regulating the multifunction of composite PCMs.
基金financially supported by the National Natural Science Foundation of China(NSFC,grant nos.52373261,52377026,and 51902025)Taishan Scholars and Young Experts Program of Shandong Province,China(grant no.tsqn202103057).
文摘Advanced multifunctional composite phase change materials(PCMs)integrating dual-field excitative thermal storage and microwave absorption have been recently highlighted in cutting-edge applications.Herein,we designed a metal–organic framework(MOF)derived magnetic NiCo-modified open carbon microcage(NiCo@C)for the encapsulation of PCMs,which simultaneously achieve fast-response multienergy capture and bimode stealth functions:The NiCo@C/PW composite PCMs exhibited a relatively high phase change enthalpy of 130.39 J/g due to the high cavity volume of the NiCo@C microcage.Strikingly,the composite PCMs demonstrated excellent solar-thermal conversion,attributed to the local surface plasmon resonance effect of NiCo nanoparticles and full-spectrum absorption of high graphitized carbon microcage.Simultaneously,composite PCMs harvested high-efficiency magnetic-thermal conversion due to the Néel and Brownian relaxation effects of diffusely embedded magnetic NiCo nanoparticles.More importantly,this thermal energy storage system achieved high-performance microwave absorption with a minimum reflection loss(RL)of−38.1 dB at 11.8 GHz at only 2.35 mm thickness.Our designed all-in-one strategy created an innovative platform for constructing advanced multifunctional microwave-absorbing composite PCMs with thermal storage,dual-energy conversion,microwave absorption,and infrared stealth.
基金supported by the National Natural Science Foundation of China(81672686)Special Support Program of Sun Yat-sen University Cancer Center(PT19020401)+1 种基金Science and Technology Planning Project of Guangzhou,China(202002030205)Clinical Oncology Foundation of Chinese Society of Clinical Oncology(Y-XD2019-124).
文摘Advanced natural killer/T cell lymphoma(NKTL)has demonstrated poor prognosis with currently available therapies.Here,we report the efficacy of anti-programmed death 1(PD-1)antibody with the P-GEMOX(pegaspargase,gemcitabine,and oxaliplatin)regimen in advanced NKTL.Nine patients underwent six 21-day cycles of anti-PD-1 antibody(day 1),pegaspargase 2000 U/m^(2)(day 1),gemcitabine 1 g/m^(2)(days 1 and 8)and oxaliplatin 130 mg/m^(2)(day 1),followed by anti-PD-1 antibody maintenance every 3 weeks.Programmed death-ligand 1(PD-L1)expression and genetic alterations were determined in paraffin-embedded pretreatment tissue samples using immunohistochemistry and next-generation sequencing(NGS)analysis.Responses were assessed using 18F-fluorodeoxyglucose positron emission tomography(18FDG-PET)and computed tomography or magnetic resonance imaging.Eight patients exhibited significant responses,comprising of seven complete remissions and one partial remission(overall response rate:88.9%).After a median follow-up of 10.6 months,6/9 patients(66.7%)remained in complete remission.The most common grade 3/4 adverse events were anemia(33.3%),neutropenia(33.3%),and thrombocytopenia(33.3%);all of which were manageable and resolved.Immunochemotherapy produced a high response rate in patients with positive PD-L1 expression(5/6,83.3%).NGS analysis suggested that STAT3/JAK3/PD-L1 alterations and ARID1A mutation were associated with immunochemotherapy efficacy.Mutation in DDX3X and alteration in epigenetic modifiers of KMT2D,TET2,and BCORL1 might indicate a poor response to immunochemotherapy.In conclusion,the anti-PD-1 antibody plus P-GEMOX regimen demonstrated promising efficacy in advanced NKTL.PD-L1 expression combined with specific genetic alterations could be used as potential biomarkers to predict therapeutic responses to immunochemotherapy.
基金supported by the National Natural Science Foundation of China(31430004,31421061,31630003,31370081 and 31570072)the Science and Technology Commission of Shanghai Municipality(16490712100)
文摘Bacterial prodigiosins are red-colored secondary metabolites with multiple activities,such as anticancer,antimalarial and immunosuppressive,which hold great potential for medical applications.In this study,dramatically enhanced prodigiosins(RED) production in Streptomyces coelicolor was achieved by combinatorial metabolic engineering,including inactivation of the repressor gene ohkA,deletion of the actinorhodin(ACT) and calcium-dependent antibiotic(CDA) biosynthetic gene clusters(BGCs) and multi-copy chromosomal integration of the RED BGC.The results showed that ohkA deletion led to a 1-fold increase of RED production over the wild-type strain M145.Then,the ACT and CDA BGCs were deleted successively based on the AohkA mutant(SBJ101).To achieve multi-copy RED BGC integration,artificial ΦC31 attB site(s) were inserted simultaneously at the position where the ACT and CDA BGCs were deleted.The resulting strains SBJ102(with a single deletion of the ACT BGC and insertion of one artificial attB site) and SBJ103(with the deletion of both BGCs and insertion of two artificial attB sites) produced 1.9-and 6-fold higher RED titers than M145,respectively.Finally,the entire RED BGC was introduced into mutants from SBJ101 to SBJ103,generating three mutants(from SBJ104 to SBJ106) with chromosomal integration of one to three copies of the RED BGC.The highest RED yield was from SBJ106,which produced a maximum level of 96.8 mg g^(-1) cell dry weight,showing a 12-fold increase relative to M145.Collectively,the metabolic engineering strategies employed in this study are very efficient for the construction of high prodigiosin-producing strains.
基金supported by National Natural Science Foundation of China (Grant No.12072030).
文摘The one-step fabricated laser-induced graphene(LIG)has the advantages of low cost,patterning of various desired geometries,and high sensitivity.However,the robustness of substrates imposes certain constraints on their applications in stretchable devices.In this paper,the substrate composed of polydimethylsiloxane(PDMS)and polyimide(PI)particles is proposed to serve as the platform to manufacture LIG.Ascribing to the inherent soft and stretchable attributes of the PI/PDMS composite substrate,the LIG based sensors can fit complex 3D configurations or bear a mechanical tension over 15%.Notably,the fluence of the laser is experimentally and theoretically determined as the only principle to characterize the formation of conductive LIG on PI/PDMS composite greatly facilitating the selection of the allowable laser scanning parameters to form the desired LIG-based devices.Three demonstrations are conducted to highlight the superiority and the potential of this soft and stretchable LIG-based system in wearable electronics and soft robots.
基金This work was supported by National Natural Science Foundation of China Grant No.81773341,81830096,82073458,81673065,81620108024,2020YFA0112904。
文摘Dear Editor,Psoriasis is a common immune mediated,chronic inflammatory skin disease,which has been characterized by epidermal acanthosis,hyperkeratosis,parakeratosis and extensive infiltration of inflammatory cell.KCs have critical roles in skin innate and adaptive immune responses during the development of psoriasis,which produce large amounts of inflammatory mediators,such as antimicrobial peptides(e.g.,S100A8,9),proinflammatory cytokines(e.g,IL-6,IL-17A,C,TNF-α,)and chemokines(e.g,CXCL1,2),triggering innate or adaptive immune responses.