Visual measurement of the microscopic temperature of porous graphene based on cholesteric liquid crystal microcapsules
Visual measurement of the microscopic temperature of porous graphene based on cholesteric liquid crystal microcapsules
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DOI：
10.3788/col202018.031201
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发表时间：
2020-02
影响因子：
3.5
通讯作者：
Haoyan Jiang;Yaoyi Tang;Xiaohan Zeng;R. Xiao;Peng Lü;L. Wang;Yan-qing Lu
中科院分区：
文献类型：
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作者：
Haoyan Jiang;Yaoyi Tang;Xiaohan Zeng;R. Xiao;Peng Lü;L. Wang;Yan-qing Lu
测量石墨烯的微观温度具有挑战性。我们采用双折射液晶微胶囊作为温度传感器，通过定量可视化的方法检测三维多孔石墨烯的局部温度。基于CLCM（尺寸为1.20 μm），我们以0.1°C的精度测量了小区域内的温度变化。通过分析两个CLCM之间的颜色变化，我们展示了在直径约为110 μm的区域内温度的动态变化。此外，通过比较三种CLCM之间的颜色演变，我们可视化的各向异性的热性能的微区。这种方便且低成本的温度测量方法有望进一步改善石墨烯基器件。
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°C. 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.