Nanoscale Shape and Size Control of Cubic, Cuboctahedral, and Octahedral Cu-Cu2O Core-Shell Nanoparticles on Si(100) by One-Step, Templateless, Capping-Agent-Free Electrodeposition

Title
Nanoscale Shape and Size Control of Cubic, Cuboctahedral, and Octahedral Cu-Cu2O Core-Shell Nanoparticles on Si(100) by One-Step, Templateless, Capping-Agent-Free Electrodeposition
Author(s)
손영구라디[라디]프라드한[프라드한]리융[리융]
Keywords
SOLUTION-PHASE SYNTHESIS; COPPER NANOPARTICLES; ELECTROCHEMICAL DEPOSITION; CONDUCTING POLYMER; SENSING PROPERTIES; CU2O NANOCUBES; THIN-FILMS; GROWTH; NUCLEATION; SILICON
Issue Date
201003
Publisher
AMER CHEMICAL SOC
Citation
ACS NANO, v.4, no.3, pp.1553 - 1560
Abstract
Cu-Cu2O core-shell nanoparticles (NPs) of different shapes over an extended nanosize regime of 5-400 nm have been deposited on a H-terminated Si(100) substrate by using a simple, one-step, templateless, and capping-agent-free electrochemical method. By precisely controlling the electrolyte concentration [CuSO4 center dot 5H(2)O] below their respective critical values, we can obtain cubic, cuboctahedral, and octahedral NPs of different average size and number density by varying the deposition time under a few seconds (<6 s). Combined glancing-incidence X-ray diffraction and depth-profiling X-ray photoelectron spectroscopy studies show that these NPs have a crystalline core-shell structure, with a face-centered cubic metallic Cu core and a simple cubic Cu2O shell with a CuO outerlayer. The shape control of Cu-Cu2O core-shell NPs can be understood in terms of a diffusion-limited progressive growth model under different kinetic conditions as dictated by different [CuSO4 center dot 5H(2)O] concentration regimes.
URI
http://hdl.handle.net/YU.REPOSITORY/22748http://dx.doi.org/10.1021/nn100023h
ISSN
1936-0851
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이과대학 > 화학생화학부 > Articles
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