Title

Room temperature hydrogen gas sensitivity of nanocrystalline pure tin oxide

Authors

Authors

S. Shukla;S. Seal

Comments

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Abbreviated Journal Title

J. Nanosci. Nanotechnol.

Keywords

nanocrystalline; oxygen-ion vacancies; sensor; sol-gel; tin oxide; SOL-GEL PROCESS; SENSING CHARACTERISTICS; FILM THICKNESS; H-2 SENSOR; THIN-FILM; SNO2; CO; SIZE; NANOPARTICLES; Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials; Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter

Abstract

Nanocrystalline (6-8 nm) tin oxide (SnO2) 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-SnO2 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-SnO2 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-SnO2 thin film sensor.

Journal Title

Journal of Nanoscience and Nanotechnology

Volume

4

Issue/Number

1-2

Publication Date

1-1-2004

Document Type

Article

Language

English

First Page

141

Last Page

145

WOS Identifier

WOS:000220646100020

ISSN

1533-4880

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