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Enhancing the stability of Ni Fe-layered double hydroxide nanosheet array for alkaline seawater oxidation by Ce doping 被引量:1
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作者 Yongchao Yao Shengjun Sun +14 位作者 Hui Zhang Zixiao Li Chaoxin Yang zhengwei cai Xun He Kai Dong Yonglan Luo Yan Wang Yuchun Ren Qian Liu Dongdong Zheng Weihua Zhuang Bo Tang Xuping Sun Wenchuang(Walter)Hu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第4期306-312,共7页
Electrocatalytic hydrogen production from seawater holds enormous promise for clean energy generation.Nevertheless,the direct electrolysis of seawater encounters significant challenges due to poor anodic stability cau... Electrocatalytic hydrogen production from seawater holds enormous promise for clean energy generation.Nevertheless,the direct electrolysis of seawater encounters significant challenges due to poor anodic stability caused by detrimental chlorine chemistry.Herein,we present our recent discovery that the incorporation of Ce into Ni Fe layered double hydroxide nanosheet array on Ni foam(Ce-Ni Fe LDH/NF)emerges as a robust electrocatalyst for seawater oxidation.During the seawater oxidation process,CeO_(2)is generated,effectively repelling Cl^(-)and inhibiting the formation of Cl O-,resulting in a notable enhancement in the oxidation activity and stability of alkaline seawater.The prepared Ce-Ni Fe LDH/NF requires only overpotential of 390 m V to achieve the current density of 1 A cm^(-2),while maintaining long-term stability for 500 h,outperforming the performance of Ni Fe LDH/NF(430 m V,150 h)by a significant margin.This study highlights the effectiveness of a Ce-doping strategy in augmenting the activity and stability of materials based on Ni Fe LDH in seawater electrolysis for oxygen evolution. 展开更多
关键词 Ce doping NiFe layered double hydroxide Seawater oxidation Electrocatalysis Cl^(-) repulsion
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Intelligent Vascularized 3D/4D/5D/6D‑Printed Tissue Scaffolds 被引量:1
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作者 Xiaoyu Han Qimanguli Saiding +7 位作者 Xiaolu cai Yi Xiao Peng Wang zhengwei cai Xuan Gong Weiming Gong Xingcai Zhang Wenguo Cui 《Nano-Micro Letters》 SCIE EI CAS CSCD 2023年第12期376-418,共43页
Blood vessels are essential for nutrient and oxygen delivery and waste removal.Scaffold-repairing materials with functional vascular networks are widely used in bone tissue engineering.Additive manufacturing is a manu... Blood vessels are essential for nutrient and oxygen delivery and waste removal.Scaffold-repairing materials with functional vascular networks are widely used in bone tissue engineering.Additive manufacturing is a manufacturing technology that creates three-dimensional solids by stacking substances layer by layer,mainly including but not limited to 3D printing,but also 4D printing,5D printing and 6D printing.It can be effectively combined with vascularization to meet the needs of vascularized tissue scaffolds by precisely tuning the mechanical structure and biological properties of smart vascular scaffolds.Herein,the development of neovascularization to vascularization to bone tissue engineering is systematically discussed in terms of the importance of vascularization to the tissue.Additionally,the research progress and future prospects of vascularized 3D printed scaffold materials are highlighted and presented in four categories:functional vascularized 3D printed scaffolds,cell-based vascularized 3D printed scaffolds,vascularized 3D printed scaffolds loaded with specific carriers and bionic vascularized 3D printed scaffolds.Finally,a brief review of vascularized additive manufacturing-tissue scaffolds in related tissues such as the vascular tissue engineering,cardiovascular system,skeletal muscle,soft tissue and a discussion of the challenges and development efforts leading to significant advances in intelligent vascularized tissue regeneration is presented. 展开更多
关键词 INTELLIGENT Additive manufacturing Tissue engineering VASCULARIZATION OSTEOGENESIS
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Evidence for Magnetic Fractional Excitations in a Kitaev Quantum-Spin-Liquid Candidate α-RuCl_(3)
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作者 Kejing Ran Jinghui Wang +12 位作者 Song Bao zhengwei cai Yanyan Shangguan Zhen Ma Wei Wang Zhao-Yang Dong P.Cermak A.Schneidewind Siqin Meng Zhilun Lu Shun-Li Yu Jian-Xin Li Jinsheng Wen 《Chinese Physics Letters》 SCIE EI CAS CSCD 2022年第2期72-77,共6页
It is known that α-RuCl_(3) has been studied extensively because of its proximity to the Kitaev quantum-spin-liquid(QSL)phase and the possibility of approaching it by tuning the competing interactions.Here we present... It is known that α-RuCl_(3) has been studied extensively because of its proximity to the Kitaev quantum-spin-liquid(QSL)phase and the possibility of approaching it by tuning the competing interactions.Here we present the first polarized inelastic neutron scattering study on α-RuCl_(3) single crystals to explore the scattering continuum around the Γ point at the Brillouin zone center,which was hypothesized to be resulting from the Kitaev QSL state but without concrete evidence.With polarization analyses,we find that,while the spin-wave excitations around the Γ point vanish above the transition temperature T_(N),the pure magnetic continuous excitations around the Γ point are robust against temperature.Furthermore,by calculating the dynamical spin-spin correlation function using the cluster perturbation theory,we derive magnetic dispersion spectra based on the K-Γ model,which involves with a ferromagnetic Kitaev interaction of −7.2 meV and an off-diagonal interaction of 5.6 meV.We find this model can reproduce not only the spin-wave excitation spectra around the Γ point,but also the non-spin-wave continuous magnetic excitations around the Γ point.These results provide evidence for the existence of fractional excitations around the Γ point originating from the Kitaev QSL state,and further support the validity of the K-Γ model as the effective minimal spin model to describe α-RuCl_(3). 展开更多
关键词 temperature EXCITATION DIAGONAL
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Recent progress on magnetic-field studies on quantum-spin-liquid candidates
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作者 Zhen Ma Kejing Ran +4 位作者 Jinghui Wang Song Bao zhengwei cai Shichao Li Jinsheng Wen 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第10期1-14,共14页
Quantum spin liquids(QSLs) represent a novel state of matter in which quantum fluctuations prevent the conventional magnetic order from being established, and the spins remain disordered even at zero temperature. Th... Quantum spin liquids(QSLs) represent a novel state of matter in which quantum fluctuations prevent the conventional magnetic order from being established, and the spins remain disordered even at zero temperature. There have been many theoretical developments proposing various QSL states. On the other hand, experimental movement was relatively slow largely due to limitations on the candidate materials and difficulties in the measurements. In recent years, the experimental progress has been accelerated. In this topical review, we give a brief summary of experiments on the QSL candidates under magnetic fields. We arrange our discussions by two categories: i) Geometrically-frustrated systems, including triangularlattice compounds YbMgGaO4 and YbZnGaO4, κ-(BEDT-TTF)2 Cu2(CN)3, and EtMe3 Sb[Pd(dmit)2]2, and the kagom′e system ZnCu3(OH)6 Cl2; ii) the Kitaev material α-RuCl3. Among these, we will pay special attention to α-RuCl3, which has been intensively studied by ours and other groups recently. We will present evidence that both supports and rejects the QSL ground state for these materials, based on which we give several perspectives to stimulate further research activities. 展开更多
关键词 quantum spin liquids spin glass neutron scattering
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Reprogramming macrophages via immune cell mobilized hydrogel microspheres for osteoarthritis treatments 被引量:4
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作者 Pengcheng Xiao Xiaoyu Han +6 位作者 Yanran Huang Jianye Yang Li Chen zhengwei cai Ning Hu Wenguo Cui Wei Huang 《Bioactive Materials》 SCIE CSCD 2024年第2期242-259,共18页
Regulating macrophage activation precisely is crucial in treating chronic inflammation in osteoarthritis(OA).However,the stable pro-inflammatory state and deep distribution of macrophages in vivo pose a great challeng... Regulating macrophage activation precisely is crucial in treating chronic inflammation in osteoarthritis(OA).However,the stable pro-inflammatory state and deep distribution of macrophages in vivo pose a great challenge to treatment.In this study,inspired by the innate immune,immune cell mobilized hydrogel microspheres were constructed by microfluidic methods and load chemokines,macrophage antibodies and engineered cell membrane vesicles(sEVs)via covalent and non-covalent junctions.The immune cell mobilized hydrogel microspheres,based on a mixture of streptavidin grafted hyaluronic acid methacrylate(HAMA-SA)and Chondroitin sulfate methacrylate(ChSMA)microspheres(HCM),can recruit,capture and reprogram proinflammatory macrophages in the joint cavity to improve the joint inflammatory microenvironment.In vitro experiments demonstrated that immune cell mobilized hydrogel microspheres had excellent macrophage recruitment,capture,and reprogramming abilities.Pro-inflammatory macrophages can be transformed into anti-inflammatory macrophages with an efficiency of 88.5%.Animal experiments also revealed significant reduction in synovial inflammation and cartilage matrix degradation of OA.Therefore,the immune cell mobilized hydrogel microspheres may be an effective treatment of OA inflammation for the future. 展开更多
关键词 Engineered cell membrane vesicles Hydrogel microspheres Macrophage reprogram OSTEOARTHRITIS
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Fe-doped Co_(3)O_(4) nanowire strutted 3D pinewood-derived carbon: A highly selective electrocatalyst for ammonia production via nitrate reduction 被引量:2
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作者 Xuwei Liu Chaozhen Liu +12 位作者 Xun He zhengwei cai Kai Dong Jun Li Xiaoya Fan Ting Xie Xiya Yang Yonglan Luo Dongdong Zheng Shengjun Sun Sulaiman Alfaifi Feng Gong Xuping Sun 《Nano Research》 SCIE EI CSCD 2024年第4期2276-2282,共7页
Nitrate(NO_(3)^(-)),a nitrogen-containing pollutant,is prevalent in aqueous solutions,contributing to a range of environmental and health-related issues.The electrocatalytic reduction of NO_(3)^(-)holds promise as a s... Nitrate(NO_(3)^(-)),a nitrogen-containing pollutant,is prevalent in aqueous solutions,contributing to a range of environmental and health-related issues.The electrocatalytic reduction of NO_(3)^(-)holds promise as a sustainable approach to both eliminating NO_(3)^(-)and generating valuable ammonia(NH_(3)).Nevertheless,the reduction reaction of NO_(3)^(-)(NO_(3)^(-)RR),involving 8-electron transfer process,is intricate,necessitating highly efficient electrocatalysts to facilitate the conversion of NO_(3)^(-)to NH_(3).In this study,Fe-doped Co_(3)O_(4) nanowire strutted three-dimensional(3D)pinewood-derived carbon(Fe-Co_(3)O_(4)/PC)is proposed as a high-efficiency NO_(3)^(-)RR electrocatalyst for NH_(3) production.Operating within 0.1 M NaOH containing NO_(3)^(-),Fe-Co_(3)O_(4)/PC demonstrates exceptional performance,obtain an impressively large NH_(3) yield of 0.55 mmol·h^(-1)·cm^(-2) and an exceptionally high Faradaic efficiency of 96.5%at-0.5 V,superior to its Co_(3)O_(4)/PC counterpart(0.2 mmol·h^(-1)·cm^(-2),73.3%).Furthermore,the study delves into the reaction mechanism of Fe-Co_(3)O_(4) for NO_(3)^(-)RR through theoretical calculations. 展开更多
关键词 Fe-doped Co_(3)O_(4) nanowire pinewood-derived carbon electrocatalytic NO_(3)-reduction NH_(3) synthesis density functional theory
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Mitochondrial-Oriented Injectable Hydrogel Microspheres Maintain Homeostasis of Chondrocyte Metabolism to Promote Subcellular Therapy in Osteoarthritis 被引量:2
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作者 Li Chen Jianye Yang +7 位作者 zhengwei cai Yanran Huang Pengcheng Xiao Hong Chen Xiaoji Luo Wei Huang Wenguo Cui Ning Hu 《Research》 SCIE EI CSCD 2024年第3期775-790,共16页
Subcellular mitochondria serve as sensors for energy metabolism and redox balance, and the dynamic regulation of functional and dysfunctional mitochondria plays a crucial role in determining cells' fate. Selective... Subcellular mitochondria serve as sensors for energy metabolism and redox balance, and the dynamic regulation of functional and dysfunctional mitochondria plays a crucial role in determining cells' fate. Selective removal of dysfunctional mitochondria at the subcellular level can provide chondrocytes with energy to prevent degeneration, thereby treating osteoarthritis. Herein, to achieve an ideal subcellular therapy, cartilage affinity peptide (WYRGRL)-decorated liposomes loaded with mitophagy activator (urolithin A) were integrated into hyaluronic acid methacrylate hydrogel microspheres through microfluidic technology, named HM@WY-Lip/UA, that could efficiently target chondrocytes and selectively remove subcellular dysfunctional mitochondria. As a result, this system demonstrated an advantage in mitochondria function restoration, reactive oxygen species scavenging, cell survival rescue, and chondrocyte homeostasis maintenance through increasing mitophagy. In a rat post-traumatic osteoarthritis model, the intra-articular injection of HM@WY-Lip/UA ameliorated cartilage matrix degradation, osteophyte formation, and subchondral bone sclerosis at 8 weeks. Overall, this study indicated that HM@WY-Lip/UA provided a protective effect on cartilage degeneration in an efficacious and clinically relevant manner, and a mitochondrial-oriented strategy has great potential in the subcellular therapy of osteoarthritis. 展开更多
关键词 SPHERES REMOVE thereby
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Surface-derived phosphate layer on NiFe-layered double hydroxide realizes stable seawater oxidation at the current density of 1 A·cm^(−2) 被引量:1
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作者 Chaoxin Yang zhengwei cai +15 位作者 Jie Liang Kai Dong Zixiao Li Hang Sun Shengjun Sun Dongdong Zheng Hui Zhang Yongsong Luo Yongchao Yao Yan Wang Yuchun Ren Qian Liu Luming Li Wei Chu Xuping Sun Bo Tang 《Nano Research》 SCIE EI CSCD 2024年第7期5786-5794,共9页
Seawater electrolysis,especially in coastlines,is widely considered as a sustainable way of making clean and high-purity H2 from renewable energy;however,the practical viability is challenged severely by the limited a... Seawater electrolysis,especially in coastlines,is widely considered as a sustainable way of making clean and high-purity H2 from renewable energy;however,the practical viability is challenged severely by the limited anode durability resulting from side reactions of chlorine species.Herein,we report an effective Cl^(−) blocking barrier of NiFe-layer double hydroxide(NiFe-LDH)to harmful chlorine chemistry during alkaline seawater oxidation(ASO),a pre-formed surface-derived NiFe-phosphate(Pi)outerlayer.Specifically,the PO_(4)^(3−)-enriched outer-layer is capable of physically and electrostatically inhibiting Cl−adsorption,which protects active Ni^(3+)sites during ASO.The NiFe-LDH with the NiFe-Pi outer-layer(NiFe-LDH@NiFe-Pi)exhibits higher current densities(j)and lower overpotentials to afford 1 A·cm^(−2)(η1000 of 370 mV versusη1000 of 420 mV)than the NiFe-LDH in 1 M KOH+seawater.Notably,the NiFe-LDH@NiFe-Pi also demonstrates longer-term electrochemical durability than NiFe-LDH,attaining 100-h duration at the j of 1 A·cm^(−2).Additionally,the importance of surface-derived PO_(4)^(3−)-enriched outer-layer in protecting the active centers,γ-NiOOH,is explained by ex situ characterizations and in situ electrochemical spectroscopic studies. 展开更多
关键词 seawater oxidation phosphate outer-layer layered double hydroxide electrostatic repulsion in situ Raman
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Kneadable dough-type hydrogel transforming from dynamic to rigid network to repair irregular bone defects
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作者 Ningtao Wang Jie Chen +8 位作者 Yanyang Chen Liang Chen Luhan Bao Zhengmei Huang Xiaoyu Han Jiangkuo Lu zhengwei cai Wenguo Cui zhengwei Huang 《Bioactive Materials》 SCIE CSCD 2024年第10期430-444,共15页
Irregular bone defects,characterized by unpredictable size,shape,and depth,pose a major challenge to clinical treatment.Although various bone grafts are available,none can fully meet the repair needs of the defective ... Irregular bone defects,characterized by unpredictable size,shape,and depth,pose a major challenge to clinical treatment.Although various bone grafts are available,none can fully meet the repair needs of the defective area.Here,this study fabricates a dough-type hydrogel(DR-Net),in which the first dynamic network is generated by coordination between thiol groups and silver ions,thereby possessing kneadability to adapt to various irregular bone defects.The second rigid covalent network is formed through photocrosslinking,maintaining the osteogenic space under external forces and achieving a better match with the bone regeneration process.In vitro,an irregular alveolar bone defect is established in the fresh porcine mandible,and the dough-type hydrogel exhibits outstanding shape adaptability,perfectly matching the morphology of the bone defect.After photocuring,the storage modulus of the hydrogel increases 8.6 times,from 3.7 kPa(before irradiation)to 32 kPa(after irradiation).Furthermore,this hydrogel enables effective loading of P24 peptide,which potently accelerates bone repair in Sprague–Dawley(SD)rats with critical calvarial defects.Overall,the dough-type hydrogel with kneadability,space-maintaining capability,and osteogenic activity exhibits exceptional potential for clinical translation in treating irregular bone defects. 展开更多
关键词 Kneadable Dough-type hydrogel Dynamic network Rigid network Irregular bone defect
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Exhausted local lactate accumulation via injectable nanozyme-functionalized hydrogel microsphere for inflammation relief and tissue regeneration 被引量:7
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作者 Jieliang Shen Ao Chen +5 位作者 zhengwei cai Zhijie Chen Ruichao Cao Zongchao Liu Yuling Li Jie Hao 《Bioactive Materials》 SCIE 2022年第6期153-168,共16页
Local lactate accumulation greatly hinders tissue repair and regeneration under ischemic condition.Herein,an injectable microsphere(MS@MCL)for local lactate exhaustion was constructed by grafting manganese dioxide(MnO... Local lactate accumulation greatly hinders tissue repair and regeneration under ischemic condition.Herein,an injectable microsphere(MS@MCL)for local lactate exhaustion was constructed by grafting manganese dioxide(MnO_(2))-lactate oxidase(LOX)composite nanozyme on microfluidic hyaluronic acid methacrylate(HAMA)microspheres via chemical bonds,achieving a long-term oxygen-promoted lactate exhaustion effect and a long half-life in vivo.The uniform and porous microspheres synthesized by microfluidic technology is beneficial to in situ injection therapy and improving encapsulation efficiency.Furthermore,chemical grafting into HAMA microspheres through amide reactions promoted local enzymatic concentration and activity enhancement.It was showed that the MS@MCL eliminated oxidative and inflammatory stress and promoted extracellular matrix metabolism and cell survival when co-cultured with nucleus pulposus cells(NPCs)in vitro.In the rat degenerative intervertebral disc model caused by lactate injection,MS@MCL showed a long-term therapeutic effect in reducing intervertebral height narrowing and preventing extracellular matrix(ECM)degradation as well as inflammatory damage in vivo.Altogether,this study confirms that this nanozyme-functionalized injectable MS@MCL effectively improves the regenerative and reparative effect in ischemic tissues by disposing of enriched lactate in local microenvironment. 展开更多
关键词 Hydrogel microsphere Microfluidic LACTATE Tissue regeneration Injection
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Shear-responsive boundary-lubricated hydrogels attenuate osteoarthritis 被引量:4
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作者 Yiting Lei Xingkuan Wang +7 位作者 Junyi Liao Jieliang Shen Yuling Li zhengwei cai Ning Hu Xiaoji Luo Wenguo Cui Wei Huang 《Bioactive Materials》 SCIE 2022年第10期472-484,共13页
Lipid-based boundary layers formed on liposome-containing hydrogels can facilitate lubrication.However,these boundary layers can be damaged by shear,resulting in decreased lubrication.Here,a shear-responsive boundary-... Lipid-based boundary layers formed on liposome-containing hydrogels can facilitate lubrication.However,these boundary layers can be damaged by shear,resulting in decreased lubrication.Here,a shear-responsive boundary-lubricated drug-loaded hydrogel is created by incorporating celecoxib(CLX)-loaded liposomes within dynamic covalent bond-based hyaluronic acid(HA)hydrogels(CLX@Lipo@HA-gel).The dynamic cross-linked network enables the hydrogel to get restructured in response to shear,and the HA matrix allows the accumulation of internal liposome microreservoirs on the sliding surfaces,which results in the formation of boundary layers to provide stable lubrication.Moreover,hydration shells formed surrounding the hydrogel can retard the degradation process,thus helping in sustaining lubrication.Furthermore,in vitro and in vivo experiments found that CLX@Lipo@HA-gels can maintain anabolic-catabolic balance,alleviate cartilage wear,and attenuate osteoarthritis progression by delivering CLX and shear-responsive boundary lubrication.Overall,CLX@Lipo@HA-gels can serve as shear-responsive boundary lubricants and drug-delivery vehicles to alleviate friction-related diseases like osteoarthritis. 展开更多
关键词 Boundary lubrication Injectable hydrogels Shear-responsive Liposomes OSTEOARTHRITIS
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Capturing dynamic biological signals via bio-mimicking hydrogel for precise remodeling of soft tissue 被引量:4
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作者 zhengwei cai Qimanguli Saiding +7 位作者 Liang Cheng Liucheng Zhang Zhen Wang Fei Wang Xinliang Chen Gang Chen Lianfu Deng Wenguo Cui 《Bioactive Materials》 SCIE 2021年第12期4506-4516,共11页
Soft tissue remodeling is a sophisticated process that sequentially provides dynamic biological signals to guide cell behavior.However,capturing these signals within hydrogel and directing over time has still been unr... Soft tissue remodeling is a sophisticated process that sequentially provides dynamic biological signals to guide cell behavior.However,capturing these signals within hydrogel and directing over time has still been unrealized owing to the poor comprehension of physiological processes.Here,a bio-mimicking hydrogel is designed via thiol-ene click reaction to capture the early physical signal triggered by inflammation,and the chemical signals provided with chemokine and natural adhesion sites,which guaranteed the precise soft tissue remodeling.This bio-mimicking hydrogel efficiently facilitated cell anchoring,migration,and invasion in the 3D matrix due to the permissive space and the interaction with integrin receptors.Besides,the covalently grafted chemokine-like peptide is optimal for colonization and functional differentiation of endothelial cells through a HIF-1αdependent signal pathway.Furthermore,the early polarization of macrophages,collagen deposition and angiogenesis in rat acute wound model,and the increased blood perfusion in mouse skin flap model have confirmed that the bio-mimicking hydrogel realized precise soft tissue remodeling and opens new avenues for the phased repair of different tissues such as nerve,myocardium,and even bone. 展开更多
关键词 Biological signals Physiological phase HYDROGEL Chemotactic Soft tissue remodeling
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Black phosphorus-based 2D materials for bone therapy 被引量:5
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作者 Liang Cheng zhengwei cai +4 位作者 Jingwen Zhao Fei Wang Min Lu Lianfu Deng Wenguo Cui 《Bioactive Materials》 SCIE 2020年第4期1026-1043,共18页
Since their discovery,Black Phosphorus(BP)-based nanomaterials have received extensive attentions in the fields of electromechanics,optics and biomedicine,due to their remarkable properties and excellent biocompatibil... Since their discovery,Black Phosphorus(BP)-based nanomaterials have received extensive attentions in the fields of electromechanics,optics and biomedicine,due to their remarkable properties and excellent biocompatibility.The most essential feature of BP is that it is composed of a single phosphorus element,which has a high degree of homology with the inorganic components of natural bone,therefore it has a full advantage in the treatment of bone defects.This review will first introduce the source,physicochemical properties,and degradation products of BP,then introduce the remodeling process of bone,and comprehensively summarize the progress of BP-based materials for bone therapy in the form of hydrogels,polymer membranes,microspheres,and three-dimensional(3D)printed scaffolds.Finally,we discuss the challenges and prospects of BP-based implant materials in bone immune regulation and outlook the future clinical application. 展开更多
关键词 Tissue engineering NANOMATERIAL Black phosphorus Bone therapy
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Evidence for a Dirac nodal-line semimetal in SrAs_3 被引量:2
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作者 Shichao Li Zhaopeng Guo +11 位作者 Dongzhi Fu Xing-Chen Pan Jinghui Wang Kejing Ran Song Bao Zhen Ma zhengwei cai Rui Wang Rui Yu Jian Sun Fengqi Song Jinsheng Wen 《Science Bulletin》 SCIE EI CSCD 2018年第9期535-541,共7页
Dirac nodal-line semimetals with the linear bands crossing along a line or loop, represent a new topological state of matter. Here, by carrying out magnetotransport measurements and performing first-principle calculat... Dirac nodal-line semimetals with the linear bands crossing along a line or loop, represent a new topological state of matter. Here, by carrying out magnetotransport measurements and performing first-principle calculations, we demonstrate that such a state has been realized in high-quality single crystals of SrAs_3.We obtain the nontrivial ∏ Berry phase by analysing the Shubnikov-de Haas quantum oscillations. We also observe a robust negative longitudinal magnetoresistance induced by the chiral anomaly.Accompanying first-principles calculations identifies that a single hole pocket enclosing the loop nodes is responsible for these observations. 展开更多
关键词 Dirac nodal-line semimetal Magnetoresistance Berry phase Quantum oscillations DFT calculations Chiral anomaly
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CoSe_(2)nanowire array enabled highly efficient electrocatalytic reduction of nitrate for ammonia synthesis
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作者 Ting Xie Xun He +15 位作者 Lang He Kai Dong Yongchao Yao zhengwei cai Xuwei Liu Xiaoya Fan Tengyue Li Dongdong Zheng Shengjun Sun Luming Li Wei Chu Asmaa Farouk Mohamed S.Hamdy Chenggang Xu Qingquan Kong Xuping Sun 《Chinese Chemical Letters》 SCIE CAS 2024年第11期481-485,共5页
The electrocatalytic reduction of nitrate(NO_(3)^(-))not only facilitates the environmentally sustainable production of ammonia(NH_(3))but also purifies water by removing NO_(3)^(-),thereby transforming waste into val... The electrocatalytic reduction of nitrate(NO_(3)^(-))not only facilitates the environmentally sustainable production of ammonia(NH_(3))but also purifies water by removing NO_(3)^(-),thereby transforming waste into valuable resources.The process of converting NO_(3)^(-)to NH_(3)is complex,involving eight electron transfers and multiple intermediates,making the choice of electrocatalyst critical.In this study,we report a cobalt selenide(Co Se_(2))nanowire array on carbon cloth(CoSe_(2)/CC)as an effective electrocatalyst for the NO_(3)^(-)to NH_(3)conversion.In an alkaline medium with 0.1 mol/L NO_(3)^(-),CoSe_(2)/CC demonstrates exceptional NH_(3)Faradaic efficiency of 97.6%and a high NH_(3)yield of 517.7μmol h^(-1)cm^(-2)at-0.6 V versus the reversible hydrogen electrode.Furthermore,insights into the reaction mechanism of CoSe_(2)in the electrocatalytic NO_(3)^(-)reduction are elucidated through density functional theory calculations. 展开更多
关键词 CoSe_(2) Electrocatalytic nitrate reduction NH_(3)synthesis Electrocatalysis Density functional theory calculation
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