Two-dimensional black phosphorus(2D BP),well known as phosphorene,has triggered tremendous attention since the first discovery in 2014.The unique puckered monolayer structure endows 2D BP intriguing properties,which f...Two-dimensional black phosphorus(2D BP),well known as phosphorene,has triggered tremendous attention since the first discovery in 2014.The unique puckered monolayer structure endows 2D BP intriguing properties,which facilitate its potential applications in various fields,such as catalyst,energy storage,sensor,etc.Owing to the large surface area,good electric conductivity,and high theoretical specific capacity,2D BP has been widely studied as electrode materials and significantly enhanced the performance of energy storage devices.With the rapid development of energy storage devices based on 2D BP,a timely review on this topic is in demand to further extend the application of 2D BP in energy storage.In this review,recent advances in experimental and theoretical development of 2D BP are presented along with its structures,properties,and synthetic methods.Particularly,their emerging applications in electrochemical energy storage,including Li−/K−/Mg−/Na-ion,Li–S batteries,and supercapacitors,are systematically summarized with milestones as well as the challenges.Benefited from the fast-growing dynamic investigation of 2D BP,some possible improvements and constructive perspectives are provided to guide the design of 2D BP-based energy storage devices with high performance.展开更多
Monoelemental two-dimensional(2D)materials(Xenes)aroused a tremendous attention in 2D science owing to their unique properties and extensive applications.Borophene,one emerging and typical Xene,has been regarded as a ...Monoelemental two-dimensional(2D)materials(Xenes)aroused a tremendous attention in 2D science owing to their unique properties and extensive applications.Borophene,one emerging and typical Xene,has been regarded as a promising agent for energy,sensor,and biomedical applications.However,the production of borophene is still a challenge because bulk boron has rather intricate spatial structures and multiple chemical properties.In this review,we describe its excellent properties including the optical,electronic,metallic,semiconducting,photoacoustic,and photothermal properties.The fabrication methods of borophene are also presented including the bottom-up fabrication and the top-down fabrication.In the end,the challenges of borophene in the latest applications are presented and perspectives are discussed.展开更多
具有良好单色性的可调谐光纤激光器是密集波分复用传输系统中的关键组件.传统的调制方法难与全光通信网络兼容.本文中,我们利用MXene(Ti2NTx)的强光热效应,对基于迈克尔逊干涉仪的全光波长调谐光纤激光器进行了研究.对于全光调制器来说...具有良好单色性的可调谐光纤激光器是密集波分复用传输系统中的关键组件.传统的调制方法难与全光通信网络兼容.本文中,我们利用MXene(Ti2NTx)的强光热效应,对基于迈克尔逊干涉仪的全光波长调谐光纤激光器进行了研究.对于全光调制器来说,信号光的相移,随控制光功率具有0.03πm W-1的线性关系.获得25 d B的调制深度,有利于提高调制器的灵敏度以实现快速的波长扫描.另外,实现的全光波长调谐激光器具有大边模抑制比,宽波长调谐范围和窄3-dB光谱宽度.这种新颖的基于Ti2NTx的全光波长调谐器不仅扩展了全光调制器的应用领域,而且也为基于Ti2NTx的异质结构提供了可扩展的可用性,以构建高性能的全光纤激光器.展开更多
Two pairs of Pt(Ⅱ) enantiomers((RR)/(SS)-Py Pt,((RR)/(SS)-Py: N,N’-(1,2-diphenylethane-1,2-diyl)dipicolinamide;(RR)-P/M-QPt,((RR)/(SS)-Q: N,N’-((1R,2R)-1,2-diphenylethane-1,2-diyl)bis(quinoline-2-carboxamide)) were...Two pairs of Pt(Ⅱ) enantiomers((RR)/(SS)-Py Pt,((RR)/(SS)-Py: N,N’-(1,2-diphenylethane-1,2-diyl)dipicolinamide;(RR)-P/M-QPt,((RR)/(SS)-Q: N,N’-((1R,2R)-1,2-diphenylethane-1,2-diyl)bis(quinoline-2-carboxamide)) were synthesized, respectively, with good circularly polarized luminescence(CPL) and tunable dissymmetry factors(g) by molecular self-induction with(RR)/(SS)-1,2-diphenylethane-1,2-diamine as carbon chiral sources. In the(RR)-P-QPt and(SS)-M-QPt, specific P-and M-configurations were effectively induced from intrinsic chiral carbon centres(R or S), ingeniously avoiding the racemic mixture formation and chiral separation. Furthermore, the chirality originating from both chiral carbon centres and helicene-like structure improves the g factor significantly, which provides a new molecular design strategy for chiral Pt(II) enantiomers with good CPL properties.展开更多
Among 2D materials(Xenes)which are at the forefront of research activities,borophene,is an exciting new entry due to its uniquely varied optical,electronic,and chemical properties in many polymorphic forms with widely...Among 2D materials(Xenes)which are at the forefront of research activities,borophene,is an exciting new entry due to its uniquely varied optical,electronic,and chemical properties in many polymorphic forms with widely varying band gaps including the lightest 2D metallic phase.In this paper,we used a simple selective chemical etching to prepare borophene with a strong near IR light-induced photothermal effect.The photothermal efficiency is similar to plasmonic Au nanoparticles,with the added benefit of borophene being degradable due to electron deficiency of boron.We introduce this selective chemical etching process to obtain ultrathin and large borophene nanosheets(thickness of ~4 nm and lateral size up to ~600 nm)from the precursor of AlB_(2).We also report first-time observation of a selective Acid etching behavior showing HCl etching of Al to form a residual B lattice,while HF selectively etches B to yield an Al lattice.We demonstrate that through surface modification with polydopamine(PDA),a biocompatible smart delivery nanoplatform of B@PDA can respond to a tumor environment,exhibiting an enhanced cellular uptake efficiency.We demonstrate that borophene can be more suitable for safe photothermal theranostic of thick tumor using deep penetrating near IR light compared to gold nanoparticles which are not degradable,thus posing longterm toxicity concerns.With about 40 kinds of borides,we hope that our work will open door to more discoveries of this top-down selective etching approach for generating borophene structures with rich unexplored thermal,electronic,and optical properties for many other technological applications.展开更多
基金This work was supported by the National Key R&D Program of China(2019YFB2204500).
文摘Two-dimensional black phosphorus(2D BP),well known as phosphorene,has triggered tremendous attention since the first discovery in 2014.The unique puckered monolayer structure endows 2D BP intriguing properties,which facilitate its potential applications in various fields,such as catalyst,energy storage,sensor,etc.Owing to the large surface area,good electric conductivity,and high theoretical specific capacity,2D BP has been widely studied as electrode materials and significantly enhanced the performance of energy storage devices.With the rapid development of energy storage devices based on 2D BP,a timely review on this topic is in demand to further extend the application of 2D BP in energy storage.In this review,recent advances in experimental and theoretical development of 2D BP are presented along with its structures,properties,and synthetic methods.Particularly,their emerging applications in electrochemical energy storage,including Li−/K−/Mg−/Na-ion,Li–S batteries,and supercapacitors,are systematically summarized with milestones as well as the challenges.Benefited from the fast-growing dynamic investigation of 2D BP,some possible improvements and constructive perspectives are provided to guide the design of 2D BP-based energy storage devices with high performance.
基金This work is supported by the State Key Research Development Program of China(Grant No.2019YFB2203503)the National Natural Science Fund(Grant Nos.61875138,61435010,and 61961136001)+1 种基金the Natural Science Foundation of Guangdong Province(Grant No.2020A1515010612)the Longhua District Science and Innovation Commission Project Grants(JCYJ201904)to Shenzhen International Institute for Biomedical Research.
文摘Monoelemental two-dimensional(2D)materials(Xenes)aroused a tremendous attention in 2D science owing to their unique properties and extensive applications.Borophene,one emerging and typical Xene,has been regarded as a promising agent for energy,sensor,and biomedical applications.However,the production of borophene is still a challenge because bulk boron has rather intricate spatial structures and multiple chemical properties.In this review,we describe its excellent properties including the optical,electronic,metallic,semiconducting,photoacoustic,and photothermal properties.The fabrication methods of borophene are also presented including the bottom-up fabrication and the top-down fabrication.In the end,the challenges of borophene in the latest applications are presented and perspectives are discussed.
基金supported by the State Key Research Development Program of China(2019YFB2203503)the National Natural Science Foundation of China(61435010,61575089,61705140 and 61805146)+1 种基金the Science and Technology Innovation Commission of Shenzhen(JCYJ20180305125141661,JCYJ20180307164612205,and GJHZ20180928160209731)support from the Instrumental Analysis Center of Shenzhen University(Xili Campus)。
文摘具有良好单色性的可调谐光纤激光器是密集波分复用传输系统中的关键组件.传统的调制方法难与全光通信网络兼容.本文中,我们利用MXene(Ti2NTx)的强光热效应,对基于迈克尔逊干涉仪的全光波长调谐光纤激光器进行了研究.对于全光调制器来说,信号光的相移,随控制光功率具有0.03πm W-1的线性关系.获得25 d B的调制深度,有利于提高调制器的灵敏度以实现快速的波长扫描.另外,实现的全光波长调谐激光器具有大边模抑制比,宽波长调谐范围和窄3-dB光谱宽度.这种新颖的基于Ti2NTx的全光波长调谐器不仅扩展了全光调制器的应用领域,而且也为基于Ti2NTx的异质结构提供了可扩展的可用性,以构建高性能的全光纤激光器.
基金supported by the National Natural Science Foundation of China (Nos. 51773088 and 21975119)。
文摘Two pairs of Pt(Ⅱ) enantiomers((RR)/(SS)-Py Pt,((RR)/(SS)-Py: N,N’-(1,2-diphenylethane-1,2-diyl)dipicolinamide;(RR)-P/M-QPt,((RR)/(SS)-Q: N,N’-((1R,2R)-1,2-diphenylethane-1,2-diyl)bis(quinoline-2-carboxamide)) were synthesized, respectively, with good circularly polarized luminescence(CPL) and tunable dissymmetry factors(g) by molecular self-induction with(RR)/(SS)-1,2-diphenylethane-1,2-diamine as carbon chiral sources. In the(RR)-P-QPt and(SS)-M-QPt, specific P-and M-configurations were effectively induced from intrinsic chiral carbon centres(R or S), ingeniously avoiding the racemic mixture formation and chiral separation. Furthermore, the chirality originating from both chiral carbon centres and helicene-like structure improves the g factor significantly, which provides a new molecular design strategy for chiral Pt(II) enantiomers with good CPL properties.
基金supported by Guangdong Scientific and Technological Project(2019B1515120043,2020A151501612,2021A1515220109,and 2022B1515020093)the Science and Technology Innovation Commission of Shenzhen(KCXFZ20201221173413038)+1 种基金the Longhua District Science and Innovation Commission Project Grants of Shenzhen(JCYJ201904)the support from Instrumental Analysis Center of Shenzhen University(Xili Campus).
文摘Among 2D materials(Xenes)which are at the forefront of research activities,borophene,is an exciting new entry due to its uniquely varied optical,electronic,and chemical properties in many polymorphic forms with widely varying band gaps including the lightest 2D metallic phase.In this paper,we used a simple selective chemical etching to prepare borophene with a strong near IR light-induced photothermal effect.The photothermal efficiency is similar to plasmonic Au nanoparticles,with the added benefit of borophene being degradable due to electron deficiency of boron.We introduce this selective chemical etching process to obtain ultrathin and large borophene nanosheets(thickness of ~4 nm and lateral size up to ~600 nm)from the precursor of AlB_(2).We also report first-time observation of a selective Acid etching behavior showing HCl etching of Al to form a residual B lattice,while HF selectively etches B to yield an Al lattice.We demonstrate that through surface modification with polydopamine(PDA),a biocompatible smart delivery nanoplatform of B@PDA can respond to a tumor environment,exhibiting an enhanced cellular uptake efficiency.We demonstrate that borophene can be more suitable for safe photothermal theranostic of thick tumor using deep penetrating near IR light compared to gold nanoparticles which are not degradable,thus posing longterm toxicity concerns.With about 40 kinds of borides,we hope that our work will open door to more discoveries of this top-down selective etching approach for generating borophene structures with rich unexplored thermal,electronic,and optical properties for many other technological applications.