Memristors have recently emerged as promising contenders for in-memory computing and artificial neural networks,attributed to their analogies to biological synapses and neurons in structural and electrical behaviors.F...Memristors have recently emerged as promising contenders for in-memory computing and artificial neural networks,attributed to their analogies to biological synapses and neurons in structural and electrical behaviors.From the diversity level,a variety of materials have been demonstrated to have great potential for memristor applications.Herein,we focus on one class of crystalline materials(CMs)-based flexible memristors with state-of-the-art experimental demonstrations.Firstly,the typical device structure and switching mechanisms are introduced.Secondly,the recent advances on CMs-based flexible memristors,including 2 D materials,metal-organic frameworks,covalent organic frameworks,and perovskites,as well as their applications for data storage and neuromorphic devices are comprehensively summarized.Finally,the future challenges and perspectives of CMs-based flexible memristors are presented.展开更多
Recently, it has been reported that physisorbed adsorbates can be trapped between the bottom surface of twodimensional(2D) materials and supported substrate to form2 D confined films. However, the influence of such 2D...Recently, it has been reported that physisorbed adsorbates can be trapped between the bottom surface of twodimensional(2D) materials and supported substrate to form2 D confined films. However, the influence of such 2D confined adsorbates on the properties of 2D materials is rarely explored. Herein, we combined atomic force microscopy(AFM), Kelvin probe force microscopy(KPFM) and Raman spectroscopy especially the ultralow frequency(ULF) Raman spectroscopy to explore the influence of 2D confined organic adlayer thickness on the ULF breathing modes of few-layer MoS2 and WSe2nanosheets. As the thickness of organic adlayers increased, red shift, coexistence of blue and red shifts as well as blue shift of ULF breathing mode was observed. KPFM measurement confirmed the enhanced n-doping and p-doping behaviors of organic adlayers as their thickness increased,respectively. Our results will provide new insights into the interaction between 2D confined adsorbates and bottom surface of 2D nanosheets, which could be useful for modulating properties of 2D materials.展开更多
基金the support from the starting funding of City University of Hong Kong(9380117)the 111 Project(D20015)+5 种基金the financial support from the National Natural Science Foundation of China(22008164)the Natural Science Foundation of Jiangsu Province(BK20190939)the Natural Science Foundation of Jiangsu Higher Education Institutions of China(19KJB150018)supported by the Natural Science Foundation of Jiangsu Higher Education Institutions(18KJA470004)the Six Talent Peaks Project of Jiangsu Province,China(XCL-078)Suzhou Key Laboratory for Low Dimensional Optoelectronic Materials and Devices(SZS201611)。
文摘Memristors have recently emerged as promising contenders for in-memory computing and artificial neural networks,attributed to their analogies to biological synapses and neurons in structural and electrical behaviors.From the diversity level,a variety of materials have been demonstrated to have great potential for memristor applications.Herein,we focus on one class of crystalline materials(CMs)-based flexible memristors with state-of-the-art experimental demonstrations.Firstly,the typical device structure and switching mechanisms are introduced.Secondly,the recent advances on CMs-based flexible memristors,including 2 D materials,metal-organic frameworks,covalent organic frameworks,and perovskites,as well as their applications for data storage and neuromorphic devices are comprehensively summarized.Finally,the future challenges and perspectives of CMs-based flexible memristors are presented.
基金supported by the National Natural Science Foundation of China (21571101 and 51322202)the Natural Science Foundation of Jiangsu Province in China (BK20161543 and BK20130927)+1 种基金the Joint Research Fund for Overseas Chinese, Hong Kong and Macao Scholars (51528201)Natural Science Foundation of Jiangsu Higher Education Institutions of China (15KJB430016)
文摘Recently, it has been reported that physisorbed adsorbates can be trapped between the bottom surface of twodimensional(2D) materials and supported substrate to form2 D confined films. However, the influence of such 2D confined adsorbates on the properties of 2D materials is rarely explored. Herein, we combined atomic force microscopy(AFM), Kelvin probe force microscopy(KPFM) and Raman spectroscopy especially the ultralow frequency(ULF) Raman spectroscopy to explore the influence of 2D confined organic adlayer thickness on the ULF breathing modes of few-layer MoS2 and WSe2nanosheets. As the thickness of organic adlayers increased, red shift, coexistence of blue and red shifts as well as blue shift of ULF breathing mode was observed. KPFM measurement confirmed the enhanced n-doping and p-doping behaviors of organic adlayers as their thickness increased,respectively. Our results will provide new insights into the interaction between 2D confined adsorbates and bottom surface of 2D nanosheets, which could be useful for modulating properties of 2D materials.
