Highly Ordered Ag/Cu Hybrid Nanostructure Arrays for Ultrasensitive Surface-Enhanced Raman Spectroscopy

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Kun Chen
  • Xinyi Zhang
  • Yongliang Zhang
  • Haitao Li
  • Timothy Williams
  • Douglas R. MacFarlane

Detail(s)

Original languageEnglish
Article number1600115
Journal / PublicationAdvanced Materials Interfaces
Volume3
Issue number13
Online published6 Apr 2016
Publication statusPublished - 8 Jul 2016
Externally publishedYes

Abstract

Despite significant progress recently made in this field, the practical application of surface-enhanced Raman spectroscopy (SERS) is frequently limited by the lack of highly sensitive, reproducible, and cost-effective substrates. The fabrication of SERS substrates with a consistently high density of hot-spots is a key step to address this issue. Here, a simple approach is reported for the fabrication of Ag/Cu hybrid nanostructure arrays as highly sensitive and cost-effective substrates for SERS application. By effectively tuning the gap size between neighboring nanorods to sub-10 nm and increasing the packing density of nanorods, ordered Cu nanorod arrays can be used as cheap and effective SERS substrates in their own right. After sputtering a very thin layer of Ag nanoparticles on the surface of the Cu nanorods to get sub-5 nm gaps, further field enhancement is enabled. A cascaded field enhancement has been evidenced by the electromagnetic simulations. The Ag/Cu hybrid nanostructure arrays exhibit a detection limit down to 10−15 m for nonresonant molecules such as benzenethiol.

Research Area(s)

  • benzenethiol, hybrid nanostructures, nanorod arrays, surface-enhanced Raman spectroscopy, ultrasensitive

Citation Format(s)

Highly Ordered Ag/Cu Hybrid Nanostructure Arrays for Ultrasensitive Surface-Enhanced Raman Spectroscopy. / Chen, Kun; Zhang, Xinyi; Zhang, Yongliang et al.
In: Advanced Materials Interfaces, Vol. 3, No. 13, 1600115, 08.07.2016.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review