石墨烯
材料科学
光纤传感器
重复性
氧化物
相对湿度
响应时间
光纤
灵敏度(控制系统)
湿度
光电子学
动态范围
光学
纳米技术
纤维
计算机科学
电子工程
复合材料
化学
热力学
物理
计算机图形学(图像)
工程类
冶金
色谱法
作者
Yi Xiao,Jun Zhang,Xiang Cai,Shaozao Tan,Jianhui Yu,Huihui Lu,Yunhan Luo,Guozhen Liao,Shiping Li,Jieyuan Tang,Zhe Chen
出处
期刊:Optics Express
[The Optical Society]
日期:2014-12-12
卷期号:22 (25): 31555-31555
被引量:93
摘要
Graphene-based electrical chemical vapor sensors can achieve extremely high sensitivity, whereas the comparatively slow sensing response and recovery, the research focused on only low concentration detection, have been known as drawbacks for many applications requiring rapid and high concentration detection. Here we report a novel graphene-based fiber-optic relative humidity (RH) sensor relying on fundamentally different sensing mechanism. The sensor can achieve power variation of up to 6.9 dB in high relative humidity range (70-95%), and display linear response with correlation coefficient of 98.2%, sensitivity of 0.31 dB/%RH, response speed of faster than 0.13%RH/s, and good repeatability in 75-95%RH. Theoretical analysis of sensing mechanism can explain the experimental result, and reveal the broad applying prospect of the sensor for other kinds of chemical vapor detection. This novel graphene-based optical sensor provides a beneficial complement to the existing electrical ones, and will promote the employment of graphene in chemical sensing techniques.
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