Room temperature methane sensor based on single wall CNTs/SnO 2 nanoparticles

Micro & nano letters

article

Sajjad Dehghani¹  Maryam Mohammadzadeh²  Mohammad Hossein Sheikhi³  Mohammad Kazem Moravvej-Farshi⁴ 

[1] Faculty of Advanced Technologies, Shiraz University;Department of Chemistry, College of Sciences, Shiraz University;School of Electrical and Computer Engineering, Shiraz University;Faculty of Electrical and Computer Engineering, Advanced Devices Simulation Lab, Tarbiat Modares University

关键词: electron beam deposition;    X-ray diffraction;    scanning electron microscopy;    nanoparticles;    gas sensors;    carbon nanotubes;    nanofabrication;    nanosensors;    organic compounds;    nanocomposites;    semiconductor materials;    tin compounds;    electron beam deposition;    X-ray diffraction analysis;    low power consumption;    room temperature methane sensor;    carbon nanotubes;    scanning electron microscopy;    single wall CNT-SnO2 nanoparticles;    low-cost SnO2 nanoparticles;    crystallography;    charge transfer mechanism;    sensing behaviour;    temperature 293 K to 298 K;    C-SnO2;   

DOI  :  10.1049/mnl.2018.5417

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Fabrication and characterisation of a new methane sensor based on carbon nanotubes (CNTs) is proposed. The sensor uses low-cost SnO 2 nanoparticles and it can detect 0.5% of methane at room temperature. SnO 2 nanoparticles were deposited by electron beam deposition. The crystallography of CNT and SnO 2 was investigated by X-ray diffraction analysis. The presence of SnO 2 nanoparticles on CNTs was confirmed by scanning electron microscope images. The study’s room temperature sensor is applicable in explosive environments like refineries. Furthermore, it is easily reversible (i.e. it can return to its initial state) in air at room temperature. Low power consumption and high sensitivity are also the other advantages of this sensor. Finally, a charge transfer mechanism is proposed to describe the sensing behaviour.

【 授权许可】

CC BY|CC BY-ND|CC BY-NC|CC BY-NC-ND