Electro-Spun nanofibers(ESNs),with their design flexibility,tailorable morphologies,and high surface area,are well-favored as triboelectric nanogenerator(TENG)materials for wearable electronics.Here,various aspects of...Electro-Spun nanofibers(ESNs),with their design flexibility,tailorable morphologies,and high surface area,are well-favored as triboelectric nanogenerator(TENG)materials for wearable electronics.Here,various aspects of ESNs-based wearable TENGs were examined.After introducing the most common TENG operating modes,an insightful overview of wearable TENG applications based on ESNs was presented.In this survey,a special attention is paid to wearable sensing,human-machine interaction,self-powered devices,and amplified energy harvesting.Efforts towards improving energy conversion efficiency,material durability,and compatibility with diverse wearable platforms were visited.Finally,a perspective based on particularly material aspect of ESNs is given,which could be insightful in tackling prevailing challenges and giving birth to new directions.展开更多
The compelling demand for higher performance and lower cost in the optoelectronics industry has driven the development of organic semiconductors.Molecular crystalline semiconductors(MCSs),especially two-dimensional MC...The compelling demand for higher performance and lower cost in the optoelectronics industry has driven the development of organic semiconductors.Molecular crystalline semiconductors(MCSs),especially two-dimensional MCSs(2D-MCSs),possess intrinsic ordered structure,quantum confinement effect,high mobility,unique optical and electrical properties,and more ecological and cheaper production,which make great promises in high-performance optoelectronic applications.Here we provide a review of design principles and synthetic strategies for 2D-MCS materials,exploiting their potential as a revolution option in associated optoelectronic devices.The merits and limitations of each strategy are presented,and these molecular crystals are considered as a competitive choice for emerging semiconducting materials in information science.Finally,the current challenges and future perspectives in this field are also elaborated.展开更多
Two-dimensional transition metal dichalcogenides (2D TMDs) possess a tunable excitonic light emission that is sensitive to external conditions such as electric field, strain, and chemical doping. In this work, we re...Two-dimensional transition metal dichalcogenides (2D TMDs) possess a tunable excitonic light emission that is sensitive to external conditions such as electric field, strain, and chemical doping. In this work, we reveal the interactions between DNA nucleobases, i.e., adenine (A), guanine (G), cytosine (C), and thymine (T) and monolayer WS2 by investigating the changes in the photoluminescence (PL) emissions of the monolayer WS2 after coating with nucleobase solutions. We found that adenine and guanine exert a clear effect on the PL profile of the monolayer WS2 and cause different PL evolution trends. In contrast, cytosine and thymine have little effect on the PL behavior. To obtain information on the interactions between the DNA bases and WS2, a series of measurements were conducted on adenine-coated WS2 monolayers, as a demonstration. The p-type doping of the WS2 monolayers on the introduction of adenine is clearly shown by both the evolution of the PL spectra and the electrical transport response. Our findings open the door for the development of label-free optical sensing approaches in which the detection signals arise from the tunable excitonic emission of the TMD itself rather than the fluorescence signals of label molecules. This dopant-selective optical response to the DNA nucleobases fills the gaps in previously reported optical biosensing methods and indicates a potential new strategy for DNA sequencing.展开更多
基金National Natural Science Foundation of China grant NSFC 11774170(ME)100 Foreign Talents Project in Jiangsu Province grant JSA2016003(ME)National Natural Science Foundation of China grant NSFC 62288102(WH):National Key Research and Development Program of China grant 2020YFA0709900(WH).
摘要Electro-Spun nanofibers(ESNs),with their design flexibility,tailorable morphologies,and high surface area,are well-favored as triboelectric nanogenerator(TENG)materials for wearable electronics.Here,various aspects of ESNs-based wearable TENGs were examined.After introducing the most common TENG operating modes,an insightful overview of wearable TENG applications based on ESNs was presented.In this survey,a special attention is paid to wearable sensing,human-machine interaction,self-powered devices,and amplified energy harvesting.Efforts towards improving energy conversion efficiency,material durability,and compatibility with diverse wearable platforms were visited.Finally,a perspective based on particularly material aspect of ESNs is given,which could be insightful in tackling prevailing challenges and giving birth to new directions.
基金support from National Key Research and Development Program of China(No.2017YFB1002900)the National Natural Science Foundation of China(Nos.91833306,62104104,22105105,and 61935017)+3 种基金China Postdoctoral Science Foundation(Nos.2020M671459 and 2020M671555)NUPT Scientific Foundation(No.NY220086),Jiangsu Province Postdoctoral Research Fund(Nos.SBH20005 and 2021K449C)Projects of International Cooperation and Exchanges NSFC(No.51811530018)China National Postdoctoral Program for Innovative Talents(No.BX20200170).
摘要The compelling demand for higher performance and lower cost in the optoelectronics industry has driven the development of organic semiconductors.Molecular crystalline semiconductors(MCSs),especially two-dimensional MCSs(2D-MCSs),possess intrinsic ordered structure,quantum confinement effect,high mobility,unique optical and electrical properties,and more ecological and cheaper production,which make great promises in high-performance optoelectronic applications.Here we provide a review of design principles and synthetic strategies for 2D-MCS materials,exploiting their potential as a revolution option in associated optoelectronic devices.The merits and limitations of each strategy are presented,and these molecular crystals are considered as a competitive choice for emerging semiconducting materials in information science.Finally,the current challenges and future perspectives in this field are also elaborated.
基金This work is supported by the Singapore Ministry of Education under MOE Tier 1 RG178/15 and MOE Tier 1 RG100/15. C. X. C. thanks the support by the National Young 1000 Talent Plan of China and the Shanghai Municipal Natural Science Foundation (No. 16ZR1402500). M. E. appreciates the support by National Synergetic Innovation Center for Advanced Materials (SICAM), the start-up fund by Nanjing Tech University, and Jiangsu 100 Talent.
摘要Two-dimensional transition metal dichalcogenides (2D TMDs) possess a tunable excitonic light emission that is sensitive to external conditions such as electric field, strain, and chemical doping. In this work, we reveal the interactions between DNA nucleobases, i.e., adenine (A), guanine (G), cytosine (C), and thymine (T) and monolayer WS2 by investigating the changes in the photoluminescence (PL) emissions of the monolayer WS2 after coating with nucleobase solutions. We found that adenine and guanine exert a clear effect on the PL profile of the monolayer WS2 and cause different PL evolution trends. In contrast, cytosine and thymine have little effect on the PL behavior. To obtain information on the interactions between the DNA bases and WS2, a series of measurements were conducted on adenine-coated WS2 monolayers, as a demonstration. The p-type doping of the WS2 monolayers on the introduction of adenine is clearly shown by both the evolution of the PL spectra and the electrical transport response. Our findings open the door for the development of label-free optical sensing approaches in which the detection signals arise from the tunable excitonic emission of the TMD itself rather than the fluorescence signals of label molecules. This dopant-selective optical response to the DNA nucleobases fills the gaps in previously reported optical biosensing methods and indicates a potential new strategy for DNA sequencing.
基金the National Natural Science Foundation of China (No.61774040)the National Young 1000 Talent Plan of China,the Shanghai Municipal Natural Science Foundation (No. 16ZR1402500)the Opening project of State Key Laboratory of Functional Materials for Informatics (Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences),Singapore Ministry of Education (MOE)Tier 1RG199/17,NTU Start-up grant M4080513,US NSF MRI-1229208and UB RENEW Institute.M.E.acknowledges support by Jiangsu 100 Talent and Six Categories of Talent.