SnO2 nanowires decorated by insulating amorphous carbon layers for improved room-temperature NO2 sensing

被引：32

作者：

Choi, Myung Sik ^{[1
]}

Na, Han Gil ^{[1
]}

Bang, Jae Hoon ^{[1
]}

Mirzaei, Ali ^{[2
,3
]}

Han, Seungmin ^{[1
]}

Lee, Ha Young ^{[1
]}

Kim, Sang Sub ^{[4
]}

Kim, Hyoun Woo ^{[1
,2
]}

Jin, Changhyun ^{[5
]}

机构：

[1] Hanyang Univ, Div Mat Sci & Engn, Seoul 133791, South Korea

[2] Hanyang Univ, Res Inst Ind Sci, Seoul 133791, South Korea

[3] Shiraz Univ Technol, Dept Mat Sci & Engn, Shiraz, Iran

[4] Inha Univ, Dept Mat Sci & Engn, Incheon 402751, South Korea

[5] Yonsei Univ, Dept Mat Sci & Engn, Seoul 03722, South Korea

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2021年 / 326卷

基金：

新加坡国家研究基金会;

关键词：

Amorphous carbon; Tin oxide; Gas sensor; Room temperature; METAL-OXIDE NANOSTRUCTURES; GAS SENSOR; FACILE SYNTHESIS; FIELD-EMISSION; DIRECT GROWTH; PERFORMANCE; FILMS; ZNO; HETEROJUNCTION; NANOPARTICLES;

D O I：

10.1016/j.snb.2020.128801

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We fabricated gas sensors by decorating amorphous carbon layers on the surfaces of SnO2 nanowires. Pretreatment and functionalization were not required for the synthesis of the SnO2-based nanocomposite, requiring only short few-second processing times. A sensing mechanism is proposed to explain the room-temperature (24 degrees C) operation of the gas sensor. The amorphous carbon not only increased the surface area, but also provided electronic effects improving the NO(2 )gas sensing likely by supplying electrons to the SnO2 and/or changing the conducting channel width inside the SnO2 by carrier transfer. The optimized gas sensor, having high response and high selectivity, can be utilized for room-temperature NO2 gas sensing applications.

引用

页数：11

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