Measuring the microscopic temperature of graphene is challenging.We used cholesteric liquid crystal microcapsules(CLCMs)as temperature sensors to detect the local temperature of three-dimensional porous graphene throu...Measuring the microscopic temperature of graphene is challenging.We used cholesteric liquid crystal microcapsules(CLCMs)as temperature sensors to detect the local temperature of three-dimensional porous graphene through quantitative visualization.Based on a CLCM(~20μm in size),we determined the temperature variation in a small area with an accuracy of 0.1℃.By analyzing the color changes between two CLCMs,we demonstrated the temperature changes dynamically in a region with a diameter of approximately 110μm.Furthermore,by comparing the color evolution among the three CLCMs,we visualized the anisotropic thermal properties in the micro-zone.This convenient and low-cost temperature measurement method is expected to further improve graphene-based devices.展开更多
基金supported by the Young Scientists Fund of the National Natural Science Foundation of China(No.61605088)the Natural Science Foundation of Jiangsu Province,China(No.BK20150845)+1 种基金the Open Foundation Project of the National Laboratory of Solid State Microstructures,Chinathe China Postdoctoral Science Foundation(No.2019M651768)。
文摘Measuring the microscopic temperature of graphene is challenging.We used cholesteric liquid crystal microcapsules(CLCMs)as temperature sensors to detect the local temperature of three-dimensional porous graphene through quantitative visualization.Based on a CLCM(~20μm in size),we determined the temperature variation in a small area with an accuracy of 0.1℃.By analyzing the color changes between two CLCMs,we demonstrated the temperature changes dynamically in a region with a diameter of approximately 110μm.Furthermore,by comparing the color evolution among the three CLCMs,we visualized the anisotropic thermal properties in the micro-zone.This convenient and low-cost temperature measurement method is expected to further improve graphene-based devices.
