NDLI: Self-seeded growth of five-fold twinned copper nanowires: mechanistic study, characterization, and SERS applications.

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Self-seeded growth of five-fold twinned copper nanowires: mechanistic study, characterization, and SERS applications.

Content Provider	Semantic Scholar
Author	Yang, Hongjie He, Sheng-Yan Tuan, Hsing-Yu
Copyright Year	2014
Abstract	A comprehensive mechanistic study conducted on the formation mechanism of five-fold twinned copper nanowires by heating copper(I) chloride with oleylamine at 170 °C is presented. Electron microscopy and UV-visible absorption spectra are used to analyze the growth mechanism of copper nanowires. High-resolution transmission electron microscopy and selected-area electron diffraction are used to investigate the detailed structure of copper nanowires and nanoparticles, and a five-twinned structure is shown to exist in the copper nanowires and nanoparticles. Additionally, experiments have been performed to indirectly confirm that oleylamine preferentially adsorbs on the {100} facets of growing crystals. On the basis of the above results, the self-seeded growth of copper nanowires is confirmed. In the initial stage of reactions, copper nanoparticles with two distinctive sizes are formed. As the reaction proceeds, larger five-twinned copper nanoparticles serve as seeds for anisotropic crystal growth. Further, copper atoms generated from an Ostwald ripening process or reduction reactions of a copper(I) chloride-oleylamine complex continue to deposit and crystallize on the twin boundaries. Once the {110} planes are generated, oleylamine preferentially adsorbs on the newly formed {100} facets and then guides the formation of nanowires. The electrical resistivity of a single copper nanowire is measured to be 41.25 nΩ-m, which is of the same order of magnitude as the value of bulk copper (16.78 nΩ-m). Finally, an effective surface-enhanced Raman spectroscopy active substrate made of copper nanowire is used to detect the 4-mercaptobenzoic acid molecules.
File Format	PDF HTM / HTML
DOI	10.1021/la4036198
PubMed reference number	24367924
Journal	Medline
Volume Number	30
Issue Number	2
Alternate Webpage(s)	http://mx.nthu.edu.tw/~hytuan/paper/38.pdf
Alternate Webpage(s)	https://doi.org/10.1021/la4036198
Journal	Langmuir : the ACS journal of surfaces and colloids
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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