Visual measurement of the microscopic temperature of porous graphene based on cholesteric liquid crystal microcapsules  

作　　者：Haoyan Jiang Yaoyi Tang Xiaohan Zeng Ruiwen Xiao Peng Lü Lei Wang Yanqing Lu 姜浩研;唐姚懿;曾筱涵;肖芮文;吕鹏;王磊;陆延青(College of Electronic and Optical Engineering&College of Microelectronics,Nanjing University of Posts and Telecommunications,Nanjing 210023,China;National Laboratory of Solid State Microstructures,Key Laboratory of Intelligent Optical Sensing and Manipulation,and College of Engineering and Applied Sciences,Nanjing University,Nanjing 210093,China)

机构地区：[1]College of Electronic and Optical Engineering&College of Microelectronics,Nanjing University of Posts and Telecommunications,Nanjing 210023,China [2]National Laboratory of Solid State Microstructures,Key Laboratory of Intelligent Optical Sensing and Manipulation,and College of Engineering and Applied Sciences,Nanjing University,Nanjing 210093,China

出　　处：《Chinese Optics Letters》2020年第3期27-30,共4页中国光学快报（英文版）

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);the Open Foundation Project of the National Laboratory of Solid State Microstructures,China;the China Postdoctoral Science Foundation(No.2019M651768)。

摘　　要：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.

关 键 词：POROUS GRAPHENE CHOLESTERIC liquid crystal microcapsule MICROSCOPIC TEMPERATURE VISUAL measurement 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TP212.11[自动化与计算机技术—检测技术与自动化装置]