Ethylenediamine Promotes Cu Nanowire Growth by Inhibiting Oxidation of Cu(111).

Journal Article

The synthesis of metal nanostructures usually requires a capping agent that is generally thought to cause anisotropic growth by blocking the addition of atoms to specific crystal facets. This work uses a series of electrochemical measurements with a quartz crystal microbalance and single-crystal electrodes to elucidate the facet-selective chemistry occurring in the synthesis of Cu nanowires. Contrary to prevailing hypotheses, ethylenediamine, a so-called capping agent in the synthesis of Cu nanowires, causes anisotropic growth by increasing the rate of atomic addition to (111) facets at the end of a growing nanowire relative to (100) facets on the sides of a nanowire. Ethylenediamine increases the reduction rate of Cu(OH)2- on a Cu(111) surface relative to Cu(100) by selectively inhibiting the formation of Cu oxide on Cu(111). This work demonstrates how studying facet-selective electrochemistry can improve the understanding of the processes by which atoms assemble to form anisotropic metal nanostructures.

Full Text

Duke Authors

Cited Authors

  • Kim, MJ; Flowers, PF; Stewart, IE; Ye, S; Baek, S; Kim, JJ; Wiley, BJ

Published Date

  • January 2017

Published In

Volume / Issue

  • 139 / 1

Start / End Page

  • 277 - 284

PubMed ID

  • 27976885

Electronic International Standard Serial Number (EISSN)

  • 1520-5126

International Standard Serial Number (ISSN)

  • 0002-7863

Digital Object Identifier (DOI)

  • 10.1021/jacs.6b10653

Language

  • eng