To the Editor:Coronary artery disease(CAD)remains a leading cause of morbidity and mortality worldwide.[1]Atherosclerosis is a slowly progressive process;therefore,effective secondary prevention is commonly recommende...To the Editor:Coronary artery disease(CAD)remains a leading cause of morbidity and mortality worldwide.[1]Atherosclerosis is a slowly progressive process;therefore,effective secondary prevention is commonly recommended to halt or delay the progression of atherosclerosis toward subsequent cardiovascular events.[2]However,despite recent advances in medical and interventional therapies,patients with coronary atherosclerotic heart disease are still at high risk of cardiovascular events,resulting in an increasing global health expenditure.展开更多
Since Akira Yoshino first proposed the usage of the carbonaceous materials as an anode of lithium ion batteries(LIBs)in 1985,carbonaceous materials such as graphite and graphene have been widely considered as LIB anod...Since Akira Yoshino first proposed the usage of the carbonaceous materials as an anode of lithium ion batteries(LIBs)in 1985,carbonaceous materials such as graphite and graphene have been widely considered as LIB anodes.Here,we explored the application of novel carbonaceous UB anodes incorporating graphene quantum dots(GQDs).We fabricated a freestanding all-carbon electrode based on a porous carbon nanotube(CNT)sponge via a facile in-situ hydrothermal deposition technique,creating coaxial structure of GQD-coated CNTs(GQD@CNTs)through electrostatic interaction and n-n stacking with tunable loading and functionalization.This hybrid structure combined conductive CNTs with highly active GQDs,in which GQDs with predesigned functional groups provided massive storage sites for Li ions and the 3D CNT frameworks avoided the agglomeration of GQDs,together contributing to a high specific capacity(700 mAh·g^-1 at 100 mA·g^-1 after 100 cycles)and rate performance.Even at a high current density of 1,000 mA·g^-1,the reversible specific capacity remained at 483 mAh g-1 after 350 cycles.In particular,the mechanism study demonstrated the important role of oxygen functional groups of GQDs in promoting the performance of the LIB anodes by controlled grafting of GQDs onto various porous-carbon and metal-foam based structures.展开更多
Development of novel biomaterials for bone regeneration is based on the sufficient bone-bonding ability,bioactivity and biocompatibility.In this study,novel flexible poly(butylene succinate)/polydimethysiloxane-modifi...Development of novel biomaterials for bone regeneration is based on the sufficient bone-bonding ability,bioactivity and biocompatibility.In this study,novel flexible poly(butylene succinate)/polydimethysiloxane-modified bioactive glass/nano-hydroxyapatite(PBSu/PDMS-BG/nHA)hybrid bioceramic with various nHA concentration on the in vitro bone-like hydroxyapatite(HA)formation,biomineralization activity and osteoblast cell biocompatibility were investigated.The rapid precipitation of HA on the hybrid bioceramic surfaces was found after being immersed in simulated body fluid(SBF)for seven days.Results show that the amount of HA deposition increased with the increase of nHA concentration.The optimized PBSu/PDMS-BG/nHA hybrid bioceramic exhibited good flexibility,high biomineralization activity and good osteoblast cell biocompatibility.展开更多
A hysteresis-less inverted perovskite solar cell(PSC)with power conversion efficiency(PCE)of 13.57%was successfully achieved based on the thermal-decomposed NiO_(x) hole contact layer,possessing better electron blocki...A hysteresis-less inverted perovskite solar cell(PSC)with power conversion efficiency(PCE)of 13.57%was successfully achieved based on the thermal-decomposed NiO_(x) hole contact layer,possessing better electron blocking and hole extraction properties for its suitable work function and high-conduction band edge position.Herein,the transparent and high-crystalline NiO_(x) film is prepared by thermal-decomposing of the solution-derived Ni(OH)_(2) film in our study,which is then employed as hole transport layer(HTL)of the organic–inorganic hybrid PSCs.Reasonably,the post-annealing treatment,especially for the annealing temperature,could greatly affect the Ni(OH)_(2) decomposition process and the quality of decomposed NiO_(x) nanoparticles.The vital NiO_(x) HTLs with discrepant morphology,crystallinity and transmission certainly lead to a wide range of device performance.As a result,an annealing process of 400℃/2 h significantly promotes the photovoltaic properties of the NiO_(x) layer and the further device performance.展开更多
Interfacial water evaporation through solar heating with photothermal materials is a promising strategy for seawater desalination and wastewater purification.Tightly packed 2D membranes with high reflection losses and...Interfacial water evaporation through solar heating with photothermal materials is a promising strategy for seawater desalination and wastewater purification.Tightly packed 2D membranes with high reflection losses and limited vapor escape channels result in a low evaporation rate.In this work,3D MXene architecture was fabricated by dropping the delaminated Ti_(3)C_(2)(d-Ti_(3)C_(2))nanosheets onto the carbonized melamine foam(CMF)framework.Owing to the macroporous 3D architecture,more effective broadband solar absorption and vapor escaping were achieved.As a result,the 3D CMF@d-Ti_(3)C_(2)-based evaporator delivers a water evaporation rate of 1.60 kg/m2·h with a solar-to-vapor conversion efficiency of up to 84.6%.展开更多
Coherent pulse stacking（CPS） is a new time-domain coherent addition technique that stacks several optical pulses into a single output pulse, enabling high pulse energy and high average power. A Z-domain model target...Coherent pulse stacking（CPS） is a new time-domain coherent addition technique that stacks several optical pulses into a single output pulse, enabling high pulse energy and high average power. A Z-domain model targeting the pulsed laser is assembled to describe the optical interference process. An algorithm, extracting the cavity phase and pulse phases from limited data, where only the pulse intensity is available, is developed to diagnose optical cavity resonators. We also implement the algorithm on the cascaded system of multiple optical cavities,achieving phase errors less than 1.0°（root mean square）, which could ensure the stability of CPS.展开更多
基金This work was supported in part by grants from the Chinese Natural Science Foundation(Nos.N82170275 and 82000420)Health Care Science Foundation(No.21BJZ06)+1 种基金Strengthening Foundation Plan(No.23M3001)Shanghai Talent Development Fund(No.2021064).
文摘To the Editor:Coronary artery disease(CAD)remains a leading cause of morbidity and mortality worldwide.[1]Atherosclerosis is a slowly progressive process;therefore,effective secondary prevention is commonly recommended to halt or delay the progression of atherosclerosis toward subsequent cardiovascular events.[2]However,despite recent advances in medical and interventional therapies,patients with coronary atherosclerotic heart disease are still at high risk of cardiovascular events,resulting in an increasing global health expenditure.
基金A.Y.C.appreciated the financial support from the National Natural Science Foundation o f C hina(No.51672005).S.Y.Y.appreciated the financial support from the National Natural Science Foundation of China(No.51872267).Z.X.W.thanks Qihang Gong for his support and encouragement all the time.
文摘Since Akira Yoshino first proposed the usage of the carbonaceous materials as an anode of lithium ion batteries(LIBs)in 1985,carbonaceous materials such as graphite and graphene have been widely considered as LIB anodes.Here,we explored the application of novel carbonaceous UB anodes incorporating graphene quantum dots(GQDs).We fabricated a freestanding all-carbon electrode based on a porous carbon nanotube(CNT)sponge via a facile in-situ hydrothermal deposition technique,creating coaxial structure of GQD-coated CNTs(GQD@CNTs)through electrostatic interaction and n-n stacking with tunable loading and functionalization.This hybrid structure combined conductive CNTs with highly active GQDs,in which GQDs with predesigned functional groups provided massive storage sites for Li ions and the 3D CNT frameworks avoided the agglomeration of GQDs,together contributing to a high specific capacity(700 mAh·g^-1 at 100 mA·g^-1 after 100 cycles)and rate performance.Even at a high current density of 1,000 mA·g^-1,the reversible specific capacity remained at 483 mAh g-1 after 350 cycles.In particular,the mechanism study demonstrated the important role of oxygen functional groups of GQDs in promoting the performance of the LIB anodes by controlled grafting of GQDs onto various porous-carbon and metal-foam based structures.
基金This work was supported by the Natural Science Basic Research Plan in Shaanxi Province of China(Program No.2019JM-520)by the Special Natural Science Foundation of Science and Technology Bureau of Xi’an City(2017CGWL23,2017CGWL26,2017CGWL27,2017CGWL28)The SEM work was done at International Center for Dielectric Research,Xi’an Jiaotong University.
文摘Development of novel biomaterials for bone regeneration is based on the sufficient bone-bonding ability,bioactivity and biocompatibility.In this study,novel flexible poly(butylene succinate)/polydimethysiloxane-modified bioactive glass/nano-hydroxyapatite(PBSu/PDMS-BG/nHA)hybrid bioceramic with various nHA concentration on the in vitro bone-like hydroxyapatite(HA)formation,biomineralization activity and osteoblast cell biocompatibility were investigated.The rapid precipitation of HA on the hybrid bioceramic surfaces was found after being immersed in simulated body fluid(SBF)for seven days.Results show that the amount of HA deposition increased with the increase of nHA concentration.The optimized PBSu/PDMS-BG/nHA hybrid bioceramic exhibited good flexibility,high biomineralization activity and good osteoblast cell biocompatibility.
基金funded by the National Natural Science Foundation of China(51502239)China Postdoctoral Science Foundation(2017T100751)+1 种基金Natural Science Basic Research Plan in Shaanxi Province of China(2016JQ6058)Postdoctoral Science Foundation in Shaanxi Province of China and the 111 Project of China(B14040)。
文摘A hysteresis-less inverted perovskite solar cell(PSC)with power conversion efficiency(PCE)of 13.57%was successfully achieved based on the thermal-decomposed NiO_(x) hole contact layer,possessing better electron blocking and hole extraction properties for its suitable work function and high-conduction band edge position.Herein,the transparent and high-crystalline NiO_(x) film is prepared by thermal-decomposing of the solution-derived Ni(OH)_(2) film in our study,which is then employed as hole transport layer(HTL)of the organic–inorganic hybrid PSCs.Reasonably,the post-annealing treatment,especially for the annealing temperature,could greatly affect the Ni(OH)_(2) decomposition process and the quality of decomposed NiO_(x) nanoparticles.The vital NiO_(x) HTLs with discrepant morphology,crystallinity and transmission certainly lead to a wide range of device performance.As a result,an annealing process of 400℃/2 h significantly promotes the photovoltaic properties of the NiO_(x) layer and the further device performance.
基金the National Natural Science Foundation of China(Grant No.61774122).
文摘Interfacial water evaporation through solar heating with photothermal materials is a promising strategy for seawater desalination and wastewater purification.Tightly packed 2D membranes with high reflection losses and limited vapor escape channels result in a low evaporation rate.In this work,3D MXene architecture was fabricated by dropping the delaminated Ti_(3)C_(2)(d-Ti_(3)C_(2))nanosheets onto the carbonized melamine foam(CMF)framework.Owing to the macroporous 3D architecture,more effective broadband solar absorption and vapor escaping were achieved.As a result,the 3D CMF@d-Ti_(3)C_(2)-based evaporator delivers a water evaporation rate of 1.60 kg/m2·h with a solar-to-vapor conversion efficiency of up to 84.6%.
基金supported by the Director,Office of Science,Office of High Energy Physics,of the U.S.Department of Energy under Contract No.DE-AC02-05CH11231by the National Natural Science Foundation of China under Grant No.11475097
文摘Coherent pulse stacking（CPS） is a new time-domain coherent addition technique that stacks several optical pulses into a single output pulse, enabling high pulse energy and high average power. A Z-domain model targeting the pulsed laser is assembled to describe the optical interference process. An algorithm, extracting the cavity phase and pulse phases from limited data, where only the pulse intensity is available, is developed to diagnose optical cavity resonators. We also implement the algorithm on the cascaded system of multiple optical cavities,achieving phase errors less than 1.0°（root mean square）, which could ensure the stability of CPS.
