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Cu 2 O Nanowires in an Alumina Template: Electrochemical Conditions for the Synthesis and Photoluminescence Characteristics
Author(s) -
Ko Eunseong,
Choi Jinsub,
Okamoto Koichi,
Tak Yongsug,
Lee Jaeyoung
Publication year - 2006
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200600060
Subject(s) - photoluminescence , nanowire , materials science , crystallite , electrochemistry , band gap , chemical engineering , diffusion , porosity , layer (electronics) , deposition (geology) , analytical chemistry (journal) , nanotechnology , electrode , metallurgy , chemistry , composite material , optoelectronics , paleontology , physics , chromatography , sediment , biology , engineering , thermodynamics
10.1002/cphc.200600060.abs Cu 2 O nanowires, mainly consisting of (100) and (200) polycrystalline structures with a length of 4 μm are prepared by electrochemical deposition using a porous alumina template. It is found that the optimized electrochemical conditions to prepare Cu 2 O nanowires are different from those for the formation of a bulk thin Cu 2 O layer since different pH values are found between the tip of the pores and the bulk, due to diffusion limits in porous alumina with an extremely high aspect ratio of 300. We point out that Cu 2 O (200), Cu 2 O (111), Cu, and co‐deposited alloys can be obtained under specific electrochemical conditions. In addition, the optical band gap of the prepared Cu 2 O nanowires with a length of 4 μm and a diameter of 200 nm is estimated to be 2.17 eV from photoluminescence measurements.