Nano Archive

Nanoparticle size-dependent lowering of temperature for phase transition from In(OH)3 to in2O3

Singh, V. N and Mehta, B. R. (2005) Nanoparticle size-dependent lowering of temperature for phase transition from In(OH)3 to in2O3. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 5 (3). 431-435(5). ISSN 1533-4880

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Abstract

Phase transformation of In(OH)3 to In2O3 has been studied as a function of nanoparticle size without any alteration of nanoparticle size during transformation. Chemically capped In(OH)3 nanoparticles having sizes of 15, 11, and 8 nm transform to In2O3 at temperatures of 285, 272, and 255°C, respectively. This first-time unambiguous observation of size-dependent lowering of transformation temperature represents a thermodynamic characteristic of the nanoparticle system. The results have been explained in terms of a lower cohesive energy of surface atoms and an increase in surface-to-volume ratio with a decrease in nanoparticle size.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:5064
Deposited By:JNCASR
Deposited On:27 May 2009 10:20
Last Modified:27 May 2009 10:20

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