Investigations on Ru doped ZnO: strain calculations and gas sensing study

TitleInvestigations on Ru doped ZnO: strain calculations and gas sensing study
Publication TypeJournal Article
Year of Publication2009
AuthorsNavale, SC, Ravi, V, Mulla, IS
JournalSensors and Actuators B-Chemical
Volume139
Issue2
Pagination466-470
Date PublishedJUN
ISSN0925-4005
KeywordsCitrate gel, Ethanol sensor, LPG sensor, Nanomaterials, ruthenium
Abstract

Pure and ruthenium (Ru) doped nano-crystalline zinc oxide (ZnO) powders were synthesized by using well-known citrate gel route. Citric acid acts as a chelating agent and thus helps in the formation of nanoparticles. The detailed X-ray diffraction (XRD) studies using Hall equation reveal that in the nanoscale dimensions, incorporation of Ru modulates the lattice strain. It is interesting to note that on Ru doping, the compressive strain present in the undoped ZnO changes into tensile strain. We have tested the response of these specimens individually for reducing gases like H(2), LPG (liquefied petroleum gas), C(2)H(5)OH (ethanol), CO, acetone and oxidizing gases like NO, and Cl(2). Undoped ZnO responses perceptibly to LPG while Ru doped sample highly senses ethanol vapors. This might be due to either change in composition on Ru doping or/and difference between basicity of LPG and C(2)H(5)OH vapors. (C) 2009 Elsevier B.V. All rights reserved.

DOI10.1016/j.snb.2009.03.068
Type of Journal (Indian or Foreign)Foreign
Impact Factor (IF)3.368
Divison category: 
Physical and Materials Chemistry