Title

Room Temperature Hydrogen Gas Sensitivity Of Nanocrystalline Pure Tin Oxide

Keywords

Nanocrystalline; Oxygen-Ion Vacancies; Sensor; Sol-Gel; Tin Oxide

Abstract

Nanocrystalline (6-8 nm) tin oxide (SnO 2) thin film (100-150 nm) sensor is synthesized via sol-gel dip-coating process. The thin film is characterized using focused ion-beam microscopy (FIB) and high-resolution transmission electron microscopy (HRTEM) techniques to determine the film thickness and the nanocrystallite size. The utilization of nanocrystalline pure-SnO 2 thin film to sense a typical reducing gas such as hydrogen, at room temperature, is demonstrated in this investigation. The grain growth behavior of nanocrystalline pure-SnO 2 is analyzed, which shows very low activation energy (9 kJ/mol) for the grain growth within the nanocrystallite size range of 3-20 nm. This low activation energy value is correlated, via excess oxygen-ion vacancy concentration, with the room temperature hydrogen gas sensitivity of the nanocrystalline pure-SnO 2 thin film sensor.

Publication Date

1-1-2004

Publication Title

Journal of Nanoscience and Nanotechnology

Volume

4

Issue

1-2

Number of Pages

141-145

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1166/jnn.2004.022

Socpus ID

2342554357 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/2342554357

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