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Shape-, size-, and density-tunable synthesis and optical properties of copper nanoparticles

Abstract

Copper nanoparticles (NPs) with tunable shape (cube, hemisphere and agglomerate), size (42 nm-146 nm) and density were synthesized on ITO substrate by electrochemical deposition. SEM, TEM, SAED, XRD, XAES and UV-vis spectrophotometry were employed to characterize the nanoparticles. The important parameters including capping agent, Cu2+ concentration, applied potential and deposition time were chosen to determine the final morphology and composition of nanoparticles. Sodium citrate, serving as capping agent and reducing agent, absorbed selectively on Cu {111} faces instead of {100} faces, which affected thermodynamic equilibrium in crystal growth, reduced aggregation and contributed to the synthesis of pure Cu NPs. Copper source, applied potential and deposition time affected dynamic process and thereby controlling the nuclei number and growth rate. The optical properties of copper nanoparticles were studied by UV-visible absorption spectroscopy, and it was found the intensity and position of LSPR peak was strongly related to the shape, size and density of Cu NPs. Cu NPs with tunable LSPR peak may be conducive to design biosensors, catalysis, optoelectronic devices, etc.

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Publication details

The article was received on 20 Apr 2017, accepted on 15 May 2017 and first published on 15 May 2017


Article type: Paper
DOI: 10.1039/C7CE00750G
Citation: CrystEngComm, 2017, Accepted Manuscript
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    Shape-, size-, and density-tunable synthesis and optical properties of copper nanoparticles

    C. Wei and Q. Liu, CrystEngComm, 2017, Accepted Manuscript , DOI: 10.1039/C7CE00750G

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