材料科学
石墨烯
聚苯胺
纳米复合材料
拉曼光谱
傅里叶变换红外光谱
化学工程
检出限
扫描电子显微镜
场发射显微术
复合材料
纳米技术
复合数
聚合
聚合物
衍射
光学
统计
物理
工程类
数学
作者
Guifang Luo,Lei Xie,Meng He,Rawat Jaisutti,Zhigang Zhu
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2021-05-03
卷期号:32 (30): 305501-305501
被引量:35
标识
DOI:10.1088/1361-6528/abf455
摘要
Abstract A flexible fabric gas sensor for the detection of sub-ppm-level NH 3 is reported in this paper. The reduced graphene oxide (rGO)-polyaniline (PANI) nanocomposite was successfully coated on cotton thread via an in situ polymerization technique. The morphology, microstructure and composition were analyzed by field-emission scanning electron microscope, x-ray diffraction, Fourier transform infrared spectroscopy and Raman spectroscopy. Furthermore, we have studied the responses of the rGO-PANI nanocomposite-based flexible sensors for the detection of NH 3 varying from 1–100 ppm, operated at 22 °C. At the optimized concentration of rGO, the response of these sensors increased by 4–5 times in comparison with the pristine rGO and PANI. These flexible sensors exhibited fast response, remarkable long-term stability, good selectivity and a low detection limit. The sensing mechanism for the high sensing performance has been thoroughly discussed and it is mainly due to the distinctive 1D fiber structure, the formation of a p-p heterojunction between the rGO nanosheets and PANI. The rGO-PANI composite-based fabric sensor with low power consumption is a potential flexible electronic device for the detection of NH 3 .
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