Open AccessRoom temperature methane sensor based on single wall CNTs/SnO 2 nanoparticles
Author(s) -
Dehghani Sajjad,
Mohammadzadeh Maryam,
Sheikhi Mohammad Hossein,
MoravvejFarshi Mohammad Kazem
Publication year - 2019
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2018.5417
Subject(s) - carbon nanotube , materials science , nanoparticle , methane , scanning electron microscope , nanotechnology , chemical engineering , fabrication , explosive material , optoelectronics , composite material , chemistry , organic chemistry , engineering , medicine , alternative medicine , pathology
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.