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Thermal and Optical Properties of In and In 2 O 3 Nanoparticles Synthesized Using Pulsed Plasma in Water
Author(s) -
Kelgenbaeva Zhazgul,
Khandaker Jahirul I.,
Ihara Hirotaka,
Omurzak Emil,
Sulaimankulova Saadat,
Mashimo Tsutomu
Publication year - 2018
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201700910
Subject(s) - tetragonal crystal system , materials science , nanoparticle , rietveld refinement , thermogravimetric analysis , annealing (glass) , lattice constant , analytical chemistry (journal) , indium , thermal stability , band gap , oxide , diffraction , crystal structure , nanotechnology , crystallography , chemical engineering , optics , optoelectronics , chemistry , composite material , metallurgy , chromatography , engineering , physics
We present small indium (In) nanoparticles with an average diameter of 4.5 nm synthesized by pulsed plasma in water. Slightly increased lattice constants and thermal stability of the tetragonal In are revealed by X‐ray diffraction analysis, Rietveld refinement, and thermogravimetric analysis. The highly crystalline body‐centered cubic indium oxide (In 2 O 3 ) nanoparticles with an average diameter of 12 nm and various shapes (semispherical, semihexagonal, and semicubic) are obtained by annealing the as‐synthesized In nanoparticles at 450 °C. The bandgap energy of the In 2 O 3 nanoparticles is 3.63 eV; the value is 25% higher than that of bulk In 2 O 3 and comparable to those of In 2 O 3 nanoparticles/thin films prepared by other methods, despite their smaller size.