文章基本信息

标题：Highly Sensitive NH3 Wireless Sensor Based on Ag-RGO Composite Operated at Room-temperature
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作者：Lei Zhang ; Qiulin Tan ; Hairong Kou 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2019
卷号：9
期号：1
页码：1-10
DOI：10.1038/s41598-019-46213-9
出版社：Springer Nature
摘要：The detection of ammonia (NH 3 ) in low concentrations is very important in the chemical industry and for human health. In this paper, we present reduced graphene oxide (RGO) decorated with silver nanoparticles (AgNPs) as a sensing material for NH 3 . A simple, environmentally friendly, and cost-efficient green approach for the preparation of the sensing material is proposed. X-ray diffraction (XRD), Raman spectroscopy, and field emission scanning electron microscopy (FE-SEM) were used to analyze the crystalline structure, material composition, and surface appearance characteristics of the sensing material. By combining the material with a commercial near-field communication (NFC) tag, a wireless gas sensor was built. The enhanced NH 3 -sensing performance is mainly due to the synergistic effect between Ag and RGO. More specifically, AgNPs enhanced the adsorption capacity of RGO for NH 3 electrons. The excellent performance of the sensor shows that it has potential for applications in food safety, environment, and human health monitoring.