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Electronic behavior of carbon clusters/hafnium oxide composite material
H. Matsui,T. Kuroda,T. Kawahara,S. Karuppuchamy,R. Kudoh,M. Yoshihara 한국물리학회 2009 Current Applied Physics Vol.9 No.1
An alternating hafnium-O-phenylene hybrid copolymer was calcined under the reduced pressure at 400–700 ℃ to obtain black-colored materials. XRD and TEM analyses showed that the calcined materials were composed of carbon clusters with the diameters of 20 nm and hafnium oxide particles with the diameters of a few nm. ESR spectral examinations revealed that the calcined materials formed a stable cation radical on the carbon clusters and exhibited an oxidation–reduction function. When Au particles were supported on the material, an efficient oxidation–reduction function was found to appear. An alternating hafnium-O-phenylene hybrid copolymer was calcined under the reduced pressure at 400–700 ℃ to obtain black-colored materials. XRD and TEM analyses showed that the calcined materials were composed of carbon clusters with the diameters of 20 nm and hafnium oxide particles with the diameters of a few nm. ESR spectral examinations revealed that the calcined materials formed a stable cation radical on the carbon clusters and exhibited an oxidation–reduction function. When Au particles were supported on the material, an efficient oxidation–reduction function was found to appear.