Based on a brief review of the traditional surface patterning research, this article introduces the recent progress in the research on surface patterning via molecular self-assembly. Because the size scale of molecula...Based on a brief review of the traditional surface patterning research, this article introduces the recent progress in the research on surface patterning via molecular self-assembly. Because the size scale of molecular self-assemblies is in the range of 1-100 nm, the method of molecular self-assembly can easily lead to the construction of ordered structures in nanometer scale, and thus break through the size limit of traditional lithography. Some novel ways of molecular self-assembly for surface patterning are particularly introduced in this review, including supramo-lecular architecture at interface, chemisorption of dendron thoils, and surface aggregation of bolaform amphiphiles. Provided that we know more and more about the basic principles governing the surface morphology, it is believed that interfacial molecular assembly would be a very competitive supramolecular technique, and a potential application in many fields such as surface property adjustment, organic patterned devices, surface molecular展开更多
Gas sensors based on organic semiconductors receive tremendous attentions owing to their advantages on high selectivity and room temperature operation. However, until now, most organic semiconductor based sensors stil...Gas sensors based on organic semiconductors receive tremendous attentions owing to their advantages on high selectivity and room temperature operation. However, until now, most organic semiconductor based sensors still suffered from problems, such as low sensitivity, slow response/recovery speed and poor stability. In addition, a clear correlation between the sensing performance and the film property is still absent. Herein, we report the investigation on sensing performance of a series of organic films with various morphologies. By simply adjusting the quality of self-assembled monolayer(SAM) on the silicon wafer surface, we obtain organic semiconductor 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene) films with varied morphologies and different charge transport abilities. The film with a small grain size and a continuous morphology presents the highest sensing performance to NO2, with a sensitivity up to 730%/ppm(ppm=parts per million, vo-lume ratio). We thus reveal that the high sensitivity of the organic film is evident related with the charge transport ability and initial conductivity of the films, as well as the morphologies of both modification layer and the active films.展开更多
Understanding the structure-performance relationship is crucial for optimizing the performance of organic thin film transistors. Here, two interface modification methods wereapplied to modulate the thin film morpholog...Understanding the structure-performance relationship is crucial for optimizing the performance of organic thin film transistors. Here, two interface modification methods wereapplied to modulate the thin film morphology of the organic semiconductor, 6,13-bis（triisopropylsilylethynyl）pentacene（TIPS-pentacene）. The resulting different film morphologies and packing structures led to distinct charge transport abilities. A substantial 40-fold increase in charge carrier mobility was observed on the octadecyltrichlorosilane（OTS）-modified sample compared to that of the transistor on the bare substrate. A better charge mobility greater than 1 cm^2· V^-1· s^-1 is realized on the p-sexiphenyl（p-6P）- modified transistors due to the large grain size, good continuity and, importantly, the intimate π-π packing in each domain.展开更多
Organic electrochemical transistor(OECT)with bulk current modulation capability based on the ion penetration into the organic semiconducting channel exhibits unique features,including high transconductance,low voltage...Organic electrochemical transistor(OECT)with bulk current modulation capability based on the ion penetration into the organic semiconducting channel exhibits unique features,including high transconductance,low voltage and large capacitance.The high current at a low voltage,together with the compatibility with aqueous environment,makes OECT particularly suitable for bioelectronic applications,such as biological interfacing,printed logic circuitry and neuromorphic devices.展开更多
Female chemical scientists are an important talent resource in chemical research world-wide,paticularly in China,with many extrordinary women in all disciplines of chemistry.The special issue on Women in Chemistry aim...Female chemical scientists are an important talent resource in chemical research world-wide,paticularly in China,with many extrordinary women in all disciplines of chemistry.The special issue on Women in Chemistry aims to demonstrate the importance of women in various fields of chemistry and encourage young female scientists to enhance their professional confidence,which is conducive to promoting chemical research.展开更多
Self-assembled supramolecular networks are promising spacer layer for electronic decoupling from the metal substrate.However,the mechanism behind of how the intrinsic electronic structure of spacer layers affects the ...Self-assembled supramolecular networks are promising spacer layer for electronic decoupling from the metal substrate.However,the mechanism behind of how the intrinsic electronic structure of spacer layers affects the adsorbate is still unclear.Here a hydrogen bonded network composed of n-type semiconducting molecules 3,4,9,10-perylene-tetracarboxylic-dianhydride(PTCDA)is prepared under ultra-high vacuum to serve as a spacer layer for functional organics C60 on Au(111).The geometric and electronic information of C60 was investigated by scanning tunneling microscopy and scanning tunneling spectroscopy(STM/STS)at 5 K.Effective decoupling from the metal surface yields an energy gap of 3.67 eV for C602nd,merely considering the HOMO-LUMO peak separation.The broadening of resonance peaks in STS measurements however indicates unneglected interlayer interactions in this hetero-organic system.Moreover,we scrutinize the nucleation sites of C60 on PTCDA layer and attribute this to the decreased diffusion capability on a less dense molecular arrangement possessing inhomogeneous spatial distribution of unoccupied molecular orbitals.展开更多
基金This work was supported by the State Major Basic Research & Development Program (Grant No. G2000078102) the National Natural Science Foundation of China (Grant Nos. 20074014 and 59928303).
文摘Based on a brief review of the traditional surface patterning research, this article introduces the recent progress in the research on surface patterning via molecular self-assembly. Because the size scale of molecular self-assemblies is in the range of 1-100 nm, the method of molecular self-assembly can easily lead to the construction of ordered structures in nanometer scale, and thus break through the size limit of traditional lithography. Some novel ways of molecular self-assembly for surface patterning are particularly introduced in this review, including supramo-lecular architecture at interface, chemisorption of dendron thoils, and surface aggregation of bolaform amphiphiles. Provided that we know more and more about the basic principles governing the surface morphology, it is believed that interfacial molecular assembly would be a very competitive supramolecular technique, and a potential application in many fields such as surface property adjustment, organic patterned devices, surface molecular
基金supported by the National Key Research and Development Program of China(No.2018YFE0200700)the National Natural Science Foundation of China(Nos.51773143,51821002)the Fund of the German-Chinese Transregional Collaborative Research Centre TRR 61(No.21661132006)。
文摘Gas sensors based on organic semiconductors receive tremendous attentions owing to their advantages on high selectivity and room temperature operation. However, until now, most organic semiconductor based sensors still suffered from problems, such as low sensitivity, slow response/recovery speed and poor stability. In addition, a clear correlation between the sensing performance and the film property is still absent. Herein, we report the investigation on sensing performance of a series of organic films with various morphologies. By simply adjusting the quality of self-assembled monolayer(SAM) on the silicon wafer surface, we obtain organic semiconductor 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene) films with varied morphologies and different charge transport abilities. The film with a small grain size and a continuous morphology presents the highest sensing performance to NO2, with a sensitivity up to 730%/ppm(ppm=parts per million, vo-lume ratio). We thus reveal that the high sensitivity of the organic film is evident related with the charge transport ability and initial conductivity of the films, as well as the morphologies of both modification layer and the active films.
基金Supported by the National Natural Science Foundation of China（Nos. 11304213, 51503138, 21527805）, and the China Postdoctoral Science Foundation（Nos.2014M550304, 2015M581856, 2015T80579）.
文摘Understanding the structure-performance relationship is crucial for optimizing the performance of organic thin film transistors. Here, two interface modification methods wereapplied to modulate the thin film morphology of the organic semiconductor, 6,13-bis（triisopropylsilylethynyl）pentacene（TIPS-pentacene）. The resulting different film morphologies and packing structures led to distinct charge transport abilities. A substantial 40-fold increase in charge carrier mobility was observed on the octadecyltrichlorosilane（OTS）-modified sample compared to that of the transistor on the bare substrate. A better charge mobility greater than 1 cm^2· V^-1· s^-1 is realized on the p-sexiphenyl（p-6P）- modified transistors due to the large grain size, good continuity and, importantly, the intimate π-π packing in each domain.
基金This work was supported by the National Key Research and Development Program of China(No.2018YFE0200700)the National Natural Science Foundation of China(Nos.51773143,51821002)+1 种基金the German-Chinese Transregional Collaborative Research Centre TRR 61(No.21661132006)the Fund of Collaborative Innovation Center of Suzhou Nano Science&Technology,the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD),China and the 111 Project of China.
文摘Organic electrochemical transistor(OECT)with bulk current modulation capability based on the ion penetration into the organic semiconducting channel exhibits unique features,including high transconductance,low voltage and large capacitance.The high current at a low voltage,together with the compatibility with aqueous environment,makes OECT particularly suitable for bioelectronic applications,such as biological interfacing,printed logic circuitry and neuromorphic devices.
文摘Female chemical scientists are an important talent resource in chemical research world-wide,paticularly in China,with many extrordinary women in all disciplines of chemistry.The special issue on Women in Chemistry aims to demonstrate the importance of women in various fields of chemistry and encourage young female scientists to enhance their professional confidence,which is conducive to promoting chemical research.
基金Supported by the National Natural Science Foundation of China(Nos.21673154,21790053)the Project of the Ministry of Science and Technology of China(No.2017YFA0205002).
文摘Self-assembled supramolecular networks are promising spacer layer for electronic decoupling from the metal substrate.However,the mechanism behind of how the intrinsic electronic structure of spacer layers affects the adsorbate is still unclear.Here a hydrogen bonded network composed of n-type semiconducting molecules 3,4,9,10-perylene-tetracarboxylic-dianhydride(PTCDA)is prepared under ultra-high vacuum to serve as a spacer layer for functional organics C60 on Au(111).The geometric and electronic information of C60 was investigated by scanning tunneling microscopy and scanning tunneling spectroscopy(STM/STS)at 5 K.Effective decoupling from the metal surface yields an energy gap of 3.67 eV for C602nd,merely considering the HOMO-LUMO peak separation.The broadening of resonance peaks in STS measurements however indicates unneglected interlayer interactions in this hetero-organic system.Moreover,we scrutinize the nucleation sites of C60 on PTCDA layer and attribute this to the decreased diffusion capability on a less dense molecular arrangement possessing inhomogeneous spatial distribution of unoccupied molecular orbitals.
