Highly reproducible surface-enhanced raman scattering on a capillarity-assisted gold nanoparticle assembly

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Ronghui Que
  • Mingwang Shao
  • Shujuan Zhuo
  • Chunye Wen
  • Suidong Wang
  • And 1 others
  • Shuit-Tong Lee

Detail(s)

Original languageEnglish
Pages (from-to)3337-3343
Journal / PublicationAdvanced Functional Materials
Volume21
Issue number17
Publication statusPublished - 9 Sep 2011

Abstract

A facile method based on capillarity-assisted assembly is used to fabricate high-performance surface-enhanced Raman scattering (SERS) substrates employing clean Au nanoparticles (NPs). This method is better than micro-channel way because the former may supply large-area uniform assembly and overcome the uneven radial distribution. Such densely-arranged assembly of Au NPs exhibits high reproducibility and large Raman enhancement factors of 3 × 10 10, arising from strong electromagnetic field coupling induced by adjacent Au NPs. The spot-to-spot SERS signals show that the relative standard deviation (RSD) in the intensity of the main Raman vibration modes (1310, 1361, 1509, 1650 cm-1) of Rhodamine 6G at a concentration of 1 × 10-10 M are consistently less than 20%, demonstrating good spatial uniformity and reproducibility. The SERS signals of sudan dye at a 1 × 10-8 M concentration also shows high reproducibility with a low RSD of 10. The spot-to-spot SERS signals showed less than 20% relative standard deviation, convincingly demonstrating excellent spatial reproducibility. The substrate was stable, exhibiting excellent uniformity and sensitivity of Raman signals after storage in air for months. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Research Area(s)

  • assembly, capillarity, gold, nanoparticles, surface-enhanced raman scattering

Citation Format(s)

Highly reproducible surface-enhanced raman scattering on a capillarity-assisted gold nanoparticle assembly. / Que, Ronghui; Shao, Mingwang; Zhuo, Shujuan; Wen, Chunye; Wang, Suidong; Lee, Shuit-Tong.

In: Advanced Functional Materials, Vol. 21, No. 17, 09.09.2011, p. 3337-3343.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal