Preparation and Characterization of Polycrystalline Cuprous Oxide Nanowires via Polyol Synthesis
Date Issued
2009
Date
2009
Author(s)
Lo, Kang-Jung
Abstract
A simple method was developed to prepare polycrystalline cuprous oxide nanostructures in organic solutions. In this study, CuCl dissolved in ethylene glycol was used as the precursor, which then mixed with polyvinylpyrrolidone (PVP) before raising temperature to 150 oC and maintaining for a designated period of time. Nanowires were formed initially and characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), atomic force microscopy (AFM) and x-ray photoelectron spectrometry (XPS). These nanowires were polycrystalline Cu2O, as determined by selective-area electron diffraction (SAED). With a longer reaction time, the surface of nanowires became smoother. Factors including the temperature, the counter-ion of the precursor, the existence of PVP and the structure directing effect of the solvent that may affect the formation of polycrystalline nanowires are discussed. At last, a plausible mechanism was proposed to explain the anisotropic growth of the 1D nanostructure.
Subjects
nanowire
copper
polycrystalline
ethylene glycol
growth mechanism
Type
thesis
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