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

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2020,（3）
• 页码范围: 27-30
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL202018.031201

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 (～20 μm 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 110 μm.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.