Title

Micromachined Sol-Gel Carbon Nanotube/Sno2 Nanocomposite Hydrogen Sensor

Keywords

Hydrogen sensor; Micromachining; Sol-gel; SWCNT/SnO nanocomposite 2

Abstract

A novel micromachined single wall carbon nanotube (SWCNT) reinforced nanocrystalline tin dioxide gas sensor has been developed. The presence of SWCNT in SnO2 matrix was realized by a spin-on sol-gel process. The SWCNT/SnO2 sensor's sensitivity for hydrogen detection has greatly increased by a factor of three, in comparison to that of pure SnO2 sensor. The novel sensor also lowers the working temperature, response time and recovery time. The greatly improved performances are mainly attributed to the effective gas accessing nano passes through SWCNT plus the smaller distance between adjacent gas accessing boundaries formed by the distribution of tiny SWCNTs. Therefore, both the spatial requirement (D ≤ 2L, D is the distance between adjacent gas accessing boundaries and L is the space charge layer thickness) and surficial requirement (adequate gas activation area) are met and the maximum inherent sensitivity of SnO2 is achieved. © 2007 Elsevier B.V. All rights reserved.

Publication Date

3-28-2008

Publication Title

Sensors and Actuators, B: Chemical

Volume

130

Issue

2

Number of Pages

829-835

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.snb.2007.10.051

Socpus ID

41249083915 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/41249083915

This document is currently not available here.

Share

COinS