Free-standing bimetallic nanorings and nanoring arrays made by on-wire lithography

Cipto Liusman, Shuzhou Li, Xiaodong Chen, Wei Wei, Hua Zhang*, George C Schatz, Freddy Boey, Chad A Mirkin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

This paper describes a new strategy for synthesizing free-standing bimetallic nanorings and nanoring arrays based upon on-wire lithography and a galvanic replacement reaction. The strategy allows one to tune the diameter, length, and therefore aspect ratio of the nanorings. In addition, it can be used to produce arrays of nanorings in high yield with control over number and spacing. Spectroscopic studies and discrete dipole approximation calculations show that nanoring dimers exhibit greater surface enhanced Raman scattering than the analogous nanodisk dimers.

Original languageEnglish (US)
Pages (from-to)7676-7682
Number of pages7
JournalACS Nano
Volume4
Issue number12
DOIs
StatePublished - Dec 28 2010

Keywords

  • galvanic replacement reaction
  • nanoring arrays
  • nanorings
  • on-wire lithography
  • surface-enhanced Raman scattering

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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