Sprayed, Scalable, Wearable, and Portable NO2 Sensor Array Using Fully Flexible AgNPs-All-Carbon Nanostructures

文献类型： 外文期刊

第一作者： Li, Weiwei

作者： Li, Weiwei;Cai, Li;Yang, Xiaokuo;Li, Weiwei;Teng, Changjiu;Sun, Yilin;Sun, Mengxing;Li, Xian;Xie, Dan;Ren, Tianling;Xiang, Lan;Xu, Jian-Long;Li, Xian

作者机构：

关键词： Flexible sensors; wearable electronics; spray coating; Ag nanoparticles; all-carbon

期刊名称：ACS APPLIED MATERIALS & INTERFACES （ 影响因子：9.229； 五年影响因子：9.57 ）

ISSN： 1944-8244

年卷期： 2018 年 10 卷 40 期

页码：

收录情况： SCI

摘要： Flexible chemical sensors usually require transfer of prepared layers or whole device onto special flexible substrates and further attachment to target objects, limiting the practical applications. Herein, a sprayed gas sensor array utilizing silver nanoparticles (AgNPs)-all-carbon hybrid nanostructures is introduced to enable direct device preparation on various target objects. The fully flexible device is formed using metallic single-walled carbon nanotubes as conductive electrodes and AgNPs-decorated reduced graphene oxide as sensing layers. The sensor presents sensitive response (R-a/R-g) of 6.0-20 ppm NO2, great mechanical robustness (3000 bending cycles), and obvious sensing ability as low as 0.2 ppm NO2 at room temperature. The sensitivity is about 3.3 and 13 times as that of the sample based on metal electrodes and the sample without AgNP decoration. The fabrication method demonstrates good scalability and suitability on the planar and nonplanar supports. The devices attached on a lab coat or the human body perform stable performance, indicating practicability in wearable and portable fields. The flexible and scalable sensor provides a new choice for real-time monitoring of toxic gases in personal mobile electronics and human-machine interactions.

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