title: High spatially resolved morphological, structural and spectroscopical studies on copper oxide nanocrystals.
abstract: Copper oxide nanocrystals decorated on multi-wall carbon nanotubes have been prepared. Comprehensive morphological, structural and spectroscopical studies have been carried out on the nanometre/atomic scale by the combination of high-resolution transmission electron microscopy and electron energy-loss near-edge structure in electron energy-loss spectroscopy, which has a high spatially resolved capacity advantage over the normally used analytical techniques such as x-ray powder diffraction (XRD) and x-ray photoelectron spectroscopy (XPS). The result reveals that highly crystalline cubic Cu(2)O nanocrystals with highly uniform dispersion, homogeneous size of about 5.3 nm and nearly spherical morphology are synthesized as the predominant phase, while rare individual monoclinic CuO nanocrystals with irregular shape are still present as the minor phase. The analysis based on the survey result and the structural symmetry difference between Cu(2)O and CuO demonstrates that XRD underestimates the presence of the CuO phase with much lower structural symmetry while XPS overestimates the proportion of CuO phase.
authors: Department of Physics and Center for Electron Microscopy, Wuhan University, Wuhan 430072, People's Republic of China. Key Laboratory of Acoustic and Photonic Materials and Devices of Ministry of Education, Wuhan University, Wuhan 430072, People's Republic of China.
authors: Jianbo
authors: J
authors: Wang
authors: Luying
authors: L
authors: Li
authors: Dongxia
authors: D
authors: Xiong
authors: Renhui
authors: R
authors: Wang
authors: Dongshan
authors: D
authors: Zhao
authors: Changping
authors: C
authors: Min
authors: Ying
authors: Y
authors: Yu
authors: Lili
authors: L
authors: Ma