The nanoscale confinement is of great important for the industrial applications of molecular sieve,desalination,and also essential in bio-logical transport systems.Massive efforts have been devoted to the influence of...The nanoscale confinement is of great important for the industrial applications of molecular sieve,desalination,and also essential in bio-logical transport systems.Massive efforts have been devoted to the influence of restricted spaces on the properties of confined fluids.However,the situation of channel-wall is crucial but attracts less attention and remains unknown.To fundamentally understand the mechanism of channel-walls in nanoconfinement,we investigated the interaction between the counter-force of the liquid and interlamellar spacing of nanochannel walls by considering the effect of both spatial confinement and surface wettability.The results reveal that the nanochannel stables at only a few discrete spacing states when its confinement is within 1.4 nm.The quantized interlayer spacing is attributed to water molecules becoming laminated structures,and the stable states are corresponding to the monolayer,bilayer and trilayer water configurations,respectively.The results can potentially help to understand the characterized interlayers spacing of graphene oxide membrane in water.Our findings are hold great promise in design of ion filtration membrane and artificial water/ion channels.展开更多
The absorption of CO_(2)is of importance in carbon capture,utilization,and storage technology for greenhouse gas control.In the present work,we clarified the mechanism of how metal-based ionic liquids (MBILs),Bmim[XCl...The absorption of CO_(2)is of importance in carbon capture,utilization,and storage technology for greenhouse gas control.In the present work,we clarified the mechanism of how metal-based ionic liquids (MBILs),Bmim[XCl_(n)]_(m)(X is the metal atom),enhance the CO_(2)absorption capacity of ILs via performing molecular dynamics simulations.The sparse hydrogen bond interaction network constructed by CO_(2)and MBILs was identified through the radial distribution function and interaction energy of CO_(2)-ion pairs,which increase the absorption capacity of CO_(2)in MBILs.Then,the dynamical properties including residence time and self-diffusion coefficient confirmed that MBILs could also promote the diffusion process of CO_(2)in ILs.That's to say,the MBILs can enhance the CO_(2)absorption capacity and the diffusive ability simultaneously.Based on the analysis of structural,energetic and dynamical properties,the CO_(2)absorption capacity of MBILs increases in the order Cl^-→[ZnCl_(4)]^(2-)→[CuCl_(4)]^(2-)→[CrCl_(4)]^-→[FeCl_(4)]^-,revealing the fact that the short metal–Cl bond length and small anion volume could facilitate the performance of CO_(2)absorbing process.These findings show that the metal–Cl bond length and effective volume of the anion can be the effective factors to regulate the CO_(2)absorption process,which can also shed light on the rational molecular design of MBILs for CO_(2)capture and other key chemical engineering processes,such as IL-based gas sensors,nano-electrical devices and so on.展开更多
The ongoing discoveries and studies of novel topological quantum materials have become an emergent and important field of condensed matter physics.Recently,HfTe_5 ignited renewed interest as a candidate of a novel top...The ongoing discoveries and studies of novel topological quantum materials have become an emergent and important field of condensed matter physics.Recently,HfTe_5 ignited renewed interest as a candidate of a novel topological material.The single-layer HfTe_5 is predicted to be a two-dimensional large band gap topological insulator and can be stacked into a bulk that may host a temperature-driven topological phase transition.Historically,HfTe_5 attracted considerable interest for its anomalous transport properties characterized by a peculiar resistivity peak accompanied by a sign reversal carrier type.The origin of the transport anomaly remains under a hot debate.Here we report the first high-resolution laser-based angle-resolved photoemission measurements on the temperature-dependent electronic structure in HfTe_5.Our results indicated that a temperature-induced Lifshitz transition occurs in HfTe_5,which provides a natural understanding on the origin of the transport anomaly in HfTe_5.In addition,our observations suggest that HfTe_5 is a weak topological insulator that is located at the phase boundary between weak and strong topological insulators at very low temperature.展开更多
Owing to the advantages of ultra-wide bandgap and rich material systems,gallium oxide(Ga_(2)O_(3))has emerged as a highly viable semiconductor material for new researches.This article mainly focuses on the growth proc...Owing to the advantages of ultra-wide bandgap and rich material systems,gallium oxide(Ga_(2)O_(3))has emerged as a highly viable semiconductor material for new researches.This article mainly focuses on the growth processes,material characteristics,and applications of Ga_(2)O_(3).Compared with single crystals and the epitaxial growth of other wide-bandgap semiconductors,large-size and high-quality𝛽-Ga_(2)O_(3) single crystals can be efficiently grown with a low cost,making them highly competitive.Thanks to the availability of high-quality single crystals,epi-taxial films,and rich material systems,high-performance semiconductor devices based on Ga_(2)O_(3) go through a booming development in recent years.The defects and interfaces of Ga_(2)O_(3) are comprehensively analyzed owing to their significant influence on practical applications.In this study,the two most common applications of Ga_(2)O_(3) materials are introduced.The high breakdown electric field,high working temperature,and excellent Baliga’s figure-of-merit of Ga_(2)O_(3) represent an inspiring prospect for power electronic devices.In addition,the excellent absorption in deep-ultraviolet band provides new ideas for optoelectronic detectors and ensures the dramatic progress.Finally,the summary,challenges,and prospects of the Ga_(2)O_(3) materials and devices are presented and discussed.展开更多
Oxygen deficiency is a major obstacle to hypoxic-related cancer theranostics,and developing the oxygen production nanoplatforms received the widespread attention.However,it is remaining a challenge to structure a nano...Oxygen deficiency is a major obstacle to hypoxic-related cancer theranostics,and developing the oxygen production nanoplatforms received the widespread attention.However,it is remaining a challenge to structure a nanoplatform with hypoxia alleviation effect and imaging-guided cancer radiotherapy.Herein,we present a novel theranostics nanoplatform(Au NPs/UCNPs/WO_(3)@C)comprising of tungsten trioxide(WO3)that loaded gold nanoparticles(Au NPs)and up-conversion nanoparticles(UCNPs)for improved photoacoustic(PA)imaging performance in the second near infrared window(NIR-Ⅱ,900-1,700 nm).Au NPs/UCNPs/WO_(3)@C exhibited superior oxygen-generation effect and doxorubicin loading capacity,thus serving as an efficient radiosensitizer for radio-chemo anti-cancer therapy.Importantly,the accumulated Au NPs/UCNPs/WO_(3)@C in the tumor region led to the increased NIR-Ⅱ PA imaging signal and the blood oxygen saturation signal,which could enhance radiation sensitivity and accurately guiding cancer radiotherapy to reduce side effects on normal tissues.This study with proof-of-concept confirmed the multifaceted characteristics and encouraging potential of biomimetic Au NPs/UCNPs/WO_(3)@C for NIR-Ⅱ PA imaging-guided tumor therapeutics.展开更多
Dear Editor,Recently,liquid-liquid phase separation(LLPS)attracts great interest for its ability to achieve spatial separation and effective organization of macromolecules(Gomes and Shorter,2018).It is believed to be ...Dear Editor,Recently,liquid-liquid phase separation(LLPS)attracts great interest for its ability to achieve spatial separation and effective organization of macromolecules(Gomes and Shorter,2018).It is believed to be the driving force to form membraneless organelles and thus plays fundamental roles in a large number of biological processes(Shin and Brangwynne,2017).A list of proteins have been identified that could undergo LLPS in vitro and in vivo(Du and Chen,2018).However,the physiological role of LLPS in animals remains largely unknown.展开更多
基金support from the National Natural Science Foundation of China(Grant Nos.12372327,12372109,11972171)National Key R&D Program of China(Grant No.2023YFB4605101).
文摘The nanoscale confinement is of great important for the industrial applications of molecular sieve,desalination,and also essential in bio-logical transport systems.Massive efforts have been devoted to the influence of restricted spaces on the properties of confined fluids.However,the situation of channel-wall is crucial but attracts less attention and remains unknown.To fundamentally understand the mechanism of channel-walls in nanoconfinement,we investigated the interaction between the counter-force of the liquid and interlamellar spacing of nanochannel walls by considering the effect of both spatial confinement and surface wettability.The results reveal that the nanochannel stables at only a few discrete spacing states when its confinement is within 1.4 nm.The quantized interlayer spacing is attributed to water molecules becoming laminated structures,and the stable states are corresponding to the monolayer,bilayer and trilayer water configurations,respectively.The results can potentially help to understand the characterized interlayers spacing of graphene oxide membrane in water.Our findings are hold great promise in design of ion filtration membrane and artificial water/ion channels.
基金financial support of the National Science Foundation of China(No.21808220)。
文摘The absorption of CO_(2)is of importance in carbon capture,utilization,and storage technology for greenhouse gas control.In the present work,we clarified the mechanism of how metal-based ionic liquids (MBILs),Bmim[XCl_(n)]_(m)(X is the metal atom),enhance the CO_(2)absorption capacity of ILs via performing molecular dynamics simulations.The sparse hydrogen bond interaction network constructed by CO_(2)and MBILs was identified through the radial distribution function and interaction energy of CO_(2)-ion pairs,which increase the absorption capacity of CO_(2)in MBILs.Then,the dynamical properties including residence time and self-diffusion coefficient confirmed that MBILs could also promote the diffusion process of CO_(2)in ILs.That's to say,the MBILs can enhance the CO_(2)absorption capacity and the diffusive ability simultaneously.Based on the analysis of structural,energetic and dynamical properties,the CO_(2)absorption capacity of MBILs increases in the order Cl^-→[ZnCl_(4)]^(2-)→[CuCl_(4)]^(2-)→[CrCl_(4)]^-→[FeCl_(4)]^-,revealing the fact that the short metal–Cl bond length and small anion volume could facilitate the performance of CO_(2)absorbing process.These findings show that the metal–Cl bond length and effective volume of the anion can be the effective factors to regulate the CO_(2)absorption process,which can also shed light on the rational molecular design of MBILs for CO_(2)capture and other key chemical engineering processes,such as IL-based gas sensors,nano-electrical devices and so on.
基金supported by the National Key Research and Development Program of China (2016YFA0300600)the National Natural Science Foundation of China(11574367)+1 种基金the National Basic Research Program of China (2013CB921700,2013CB921904 and 2015CB921300)the Strategic Priority Research Program(B) of the Chinese Academy of Sciences(XDB07020300)
文摘The ongoing discoveries and studies of novel topological quantum materials have become an emergent and important field of condensed matter physics.Recently,HfTe_5 ignited renewed interest as a candidate of a novel topological material.The single-layer HfTe_5 is predicted to be a two-dimensional large band gap topological insulator and can be stacked into a bulk that may host a temperature-driven topological phase transition.Historically,HfTe_5 attracted considerable interest for its anomalous transport properties characterized by a peculiar resistivity peak accompanied by a sign reversal carrier type.The origin of the transport anomaly remains under a hot debate.Here we report the first high-resolution laser-based angle-resolved photoemission measurements on the temperature-dependent electronic structure in HfTe_5.Our results indicated that a temperature-induced Lifshitz transition occurs in HfTe_5,which provides a natural understanding on the origin of the transport anomaly in HfTe_5.In addition,our observations suggest that HfTe_5 is a weak topological insulator that is located at the phase boundary between weak and strong topological insulators at very low temperature.
基金supported by the National Natural Science Foun-dation of China(Grants No.61925110,U20A20207,61821091,62004184,62004186,61774081,62004147,51932004,52002219,and 51961145110)the Ministry of Science and Technology of China(Grant No.2018YFB0406500)+6 种基金the Strategic Priority Research Pro-gram of the Chinese Academy of Sciences(Grant No.XDB44000000)the Key Research Program of Frontier Sciences of the CAS(Grant No.QYZDB-SSW-JSC048)the Key-Area Research and Development Program of Guangdong Province(Grant No.2020B010174002)the Fundamental Research Funds for the Central Universities under(Grants No.WK2100000014 and WK2100000010)funding sup-port from the University of Science and Technology of China(Grant No.KY2100000109)the China Postdoctoral Science Foundation(Grants No.2020M671895 and BX20200320)the Opening Project of the Key Laboratory of Microelectronics Devices and Integration Technology at the Institute of Microelectronics of CAS,and the Key Laboratory of Nanodevices and Applications in Suzhou Institute of Nano-Tech and Nano-Bionics of CAS。
文摘Owing to the advantages of ultra-wide bandgap and rich material systems,gallium oxide(Ga_(2)O_(3))has emerged as a highly viable semiconductor material for new researches.This article mainly focuses on the growth processes,material characteristics,and applications of Ga_(2)O_(3).Compared with single crystals and the epitaxial growth of other wide-bandgap semiconductors,large-size and high-quality𝛽-Ga_(2)O_(3) single crystals can be efficiently grown with a low cost,making them highly competitive.Thanks to the availability of high-quality single crystals,epi-taxial films,and rich material systems,high-performance semiconductor devices based on Ga_(2)O_(3) go through a booming development in recent years.The defects and interfaces of Ga_(2)O_(3) are comprehensively analyzed owing to their significant influence on practical applications.In this study,the two most common applications of Ga_(2)O_(3) materials are introduced.The high breakdown electric field,high working temperature,and excellent Baliga’s figure-of-merit of Ga_(2)O_(3) represent an inspiring prospect for power electronic devices.In addition,the excellent absorption in deep-ultraviolet band provides new ideas for optoelectronic detectors and ensures the dramatic progress.Finally,the summary,challenges,and prospects of the Ga_(2)O_(3) materials and devices are presented and discussed.
基金This research was supported by the National Natural Science Foundation of China(Nos.22027805 and 21874024)the National Key R&D Program of China(No.2020YFA0210800)+1 种基金the joint research projects of Health and Education Commission of Fujian Province(No.2019-WJ-20)the Natural Science Foundation of Fujian Province(No.2020J02012).
文摘Oxygen deficiency is a major obstacle to hypoxic-related cancer theranostics,and developing the oxygen production nanoplatforms received the widespread attention.However,it is remaining a challenge to structure a nanoplatform with hypoxia alleviation effect and imaging-guided cancer radiotherapy.Herein,we present a novel theranostics nanoplatform(Au NPs/UCNPs/WO_(3)@C)comprising of tungsten trioxide(WO3)that loaded gold nanoparticles(Au NPs)and up-conversion nanoparticles(UCNPs)for improved photoacoustic(PA)imaging performance in the second near infrared window(NIR-Ⅱ,900-1,700 nm).Au NPs/UCNPs/WO_(3)@C exhibited superior oxygen-generation effect and doxorubicin loading capacity,thus serving as an efficient radiosensitizer for radio-chemo anti-cancer therapy.Importantly,the accumulated Au NPs/UCNPs/WO_(3)@C in the tumor region led to the increased NIR-Ⅱ PA imaging signal and the blood oxygen saturation signal,which could enhance radiation sensitivity and accurately guiding cancer radiotherapy to reduce side effects on normal tissues.This study with proof-of-concept confirmed the multifaceted characteristics and encouraging potential of biomimetic Au NPs/UCNPs/WO_(3)@C for NIR-Ⅱ PA imaging-guided tumor therapeutics.
文摘Dear Editor,Recently,liquid-liquid phase separation(LLPS)attracts great interest for its ability to achieve spatial separation and effective organization of macromolecules(Gomes and Shorter,2018).It is believed to be the driving force to form membraneless organelles and thus plays fundamental roles in a large number of biological processes(Shin and Brangwynne,2017).A list of proteins have been identified that could undergo LLPS in vitro and in vivo(Du and Chen,2018).However,the physiological role of LLPS in animals remains largely unknown.
