Browsing by Author "Lee, Chi-Feng"

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Morphological determination of face-centered-cubic metallic nanoparticles by X-ray diffraction
(2012-03-01)
Lee, Chi-Feng
;
Chang, Chia-Lun
;
Yang, Jing-Cyuan
;
Lai, Hsiang-Yu
;
Chen, Chun-Hua
X-ray diffraction studies of face-centered-cubic metallic nanoparticles with different morphologies are discussed based on the experimental data and the calculation of the Debye equation with the truncated and perfect strain models. At least four basic morphologies frequently observed in face-centered-cubic metallic nanoparticles, namely sphere, cube, decahedron, and icosahedron, can be clearly distinguished from their characteristic integrated intensity ratios of the first two X-ray diffraction peaks, that is, (200) to (111). (C) 2011 Elsevier Inc. All rights reserved.
Structural and Optical Properties of Novel In(2)O(3) Nanoparticle-Assembled Nanorods
(2010-09-01)
Lai, Hsiang-Yu
;
Chen, Chun-Hua
;
Lee, Chi-Feng
;
材料科學與工程學系
;
Department of Materials Science and Engineering
In(2)O(3) nanoparticle-assembled nanorods with distinct surface morphologies have been newly synthesized by a dehydration process of self-assembled In(OH)(3) nanorods obtained from a liquid-based route. The reaction mechanism and the structural transformation between these two one-dimensional nanorods, In(2)O(3) and In(OH)(3), were precisely characterized by means of various qualitative and quantitative analyses with X-ray scattering simulations. The broad absorption band in the UV-visible spectrum evidently originates from the nanoparticle-assembling effect within the In(2)O(3) nanorods. An intensive photoluminescence emission at 440 nm observed under an excitation wavelength of 325 nm is attributed to the existence of oxygen vacancies within the In(2)O(3) nanorods.
Structural and Optical Properties of Novel In2O3 Nanoparticle-Assembled Nanorods
(2010-09-01)
Lai, Hsiang-Yu
;
Chen, Chun-Hua
;
Lee, Chi-Feng
;
材料科學與工程學系
;
Department of Materials Science and Engineering
In2O3 nanoparticle-assembled nanorods with distinct surface morphologies have been newly synthesized by a dehydration process of self-assembled In(OH)(3) nanorods obtained from a liquid-based route. The reaction mechanism and the structural transformation between these two one-dimensional nanorods, In2O3 and In(OH)(3), were precisely characterized by means of various qualitative and quantitative analyses with X-ray scattering simulations. The broad absorption band in the UV-visible spectrum evidently originates from the nanoparticle-assembling effect within the In2O3 nanorods. An intensive photoluminescence emission at 440 nm observed under an excitation wavelength of 325 nm is attributed to the existence of oxygen vacancies within the In2O3 nanorods.