TY - JOUR
T1 - Colloidal ceria nanocrystals
T2 - A tailor-made crystal morphology in supercritical water
AU - Zhang, Jing
AU - Ohara, Satoshi
AU - Umetsu, Mitsuo
AU - Naka, Takashi
AU - Hatakeyama, Yoshiharu
AU - Adschiri, Tadafumi
PY - 2007/1/20
Y1 - 2007/1/20
N2 - A simple, rapid and green chemistry approach to controlling the shape of ceria nanocrystals by tuning the interaction of organic molecules with various crystallographic planes of fluorite cubic ceria, using supercritical water as a reaction medium was investigated. Crystal structure and morphology of the synthesized ceria nanocrystals were characterized by means of powder X-ray diffraction, TEM, and HRTEM. The XRD patterns of the crystals indicated that they had a fluorite cubic structure. TEM images of the ceria nanocrystals with uncapped surfaces showed spherelike shapes with an average diameter of 7 nm, and the nanocrystals were aggregated. It was observed that these nanocrystals can be self-assembled into close-packed superlattices on carbon substrates. They can find application in a variety of areas, including photonics and catalysis.
AB - A simple, rapid and green chemistry approach to controlling the shape of ceria nanocrystals by tuning the interaction of organic molecules with various crystallographic planes of fluorite cubic ceria, using supercritical water as a reaction medium was investigated. Crystal structure and morphology of the synthesized ceria nanocrystals were characterized by means of powder X-ray diffraction, TEM, and HRTEM. The XRD patterns of the crystals indicated that they had a fluorite cubic structure. TEM images of the ceria nanocrystals with uncapped surfaces showed spherelike shapes with an average diameter of 7 nm, and the nanocrystals were aggregated. It was observed that these nanocrystals can be self-assembled into close-packed superlattices on carbon substrates. They can find application in a variety of areas, including photonics and catalysis.
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U2 - 10.1002/adma.200600964
DO - 10.1002/adma.200600964
M3 - Article
AN - SCOPUS:33846603307
SN - 0935-9648
VL - 19
SP - 203
EP - 206
JO - Advanced Materials
JF - Advanced Materials
IS - 2
ER -