Ambient pressure syntheses of size-controlled corundum-type In2O3 nanocubes.
Hydrolysis of In(O-iPr)3 by 10 molar excess of water at 90 degrees C in a surfactant/solvent mixture of oleylamine/oleic acid/trioctylamine provides very small nanoparticles (<5 nm in diameter) of In(O)(OH). Subsequent in situ thermolysis of the formed In(O)(OH) nanoparticles at 350 degrees C and ambient pressure produces monodisperse h-In2O3 nanocubes, which can form an extended two-dimensional array on a flat surface. The size of the In2O3 nanocubes (8, 10, and 12 nm) could be easily controlled by the simple change in the amounts of employed surfactants. The h-In2O3 nanocube samples show blue PL emissions at room temperature due to, presumably, systematic oxygen vacancy.
Lee
Chang Hoon
CH
Department of Chemistry and Center for Electro- and Photo-Responsive Molecules, Korea University, Seoul, Korea 136-701.
Kim
Minsik
M
Kim
Taekhoon
T
Kim
Ansoon
A
Paek
Jungsun
J
Lee
Ju Wook
JW
Choi
Sung-Yool
SY
Kim
Kyuwon
K
Park
Jong-Bong
JB
Lee
Kwangyeol
K