Evaluation of n-type ternary metal oxide NiMn2O4 nanomaterial for humidity sensing

TitleEvaluation of n-type ternary metal oxide NiMn2O4 nanomaterial for humidity sensing
Publication TypeJournal Article
Year of Publication2014
AuthorsGawli, Y, Badadhe, SS, Basu, A, Guin, D, Shelke, MV, Ogale, S
JournalSensors and Actuators B-Chemical
Date PublishedFEB
Type of ArticleArticle
KeywordsHumidity, Impedance, Nanoparticles, NiMn2O4, Oleic acid, Sensor

Synthesis of mono-dispersed oleic acid (OA) capped NiMn2O4 (NMO) nanoparticles and their use for humidity sensing is reported. Oleic acid capped NMO (NMO-cOA) nanoparticles are synthesized from nickel oleate and manganese oleate complex. NiMn2O4 is obtained by removing oleic acid capping at 500 degrees C in air. X-ray diffraction analysis shows formation of pure NiMn2O4 phase which is also confirmed by HRTEM-SAED analysis. The TEM analysis also shows that the nanoparticles are nearly mono-dispersed. Doctor bladed films of NMO nanoparticles are seen to exhibit excellent humidity sensing property. The resistivity is seen to change by two orders with humidity change from 11% RH to 92% RH with fairly good linearity over the entire range. The response and recovery times are also fast. (C) 2013 Elsevier B.V. All rights reserved.

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Divison category: 
Biochemical Sciences
Physical and Materials Chemistry