Facile fabrication of large area of aggregated gold nanorods film for efficient surface-enhanced Raman scattering

Yuling Wang, Shaojun Guo, Hongjun Chen, Erkang Wang*

*Corresponding author for this work

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

An effective and facile method for fabrication of large area of aggregated gold nanorods (AuNRs) film was proposed by self-assembly of AuNRs at a toluene/water interface for the first time. It was found that large area of aggregated AuNRs film could be formed at the interface of toluene and water due to the interfacial tension between the two phases. The obtained large area of aggregated AuNRs film exhibits strong surface-enhanced Raman scattering (SERS) activity with 4-aminothiophenol (4-ATP) and 2-aminothiophenol (2-ATP) as the probe molecules based on the strong electromagnetic coupling effect between the very adjacent AuNRs. Enhancement factors (EF) were used to estimate the SERS activity of the aggregated AuNRs film, which is obtained to be 1.7 × 105 for 7a vibration of 4-ATP. SERS intensity is compared with AuNRs deposited directly on glass, indicating high SERS activity and reproducibility of the aggregated AuNRs film. In addition, SERS activity has also been successfully demonstrated for dye molecule (Rhodamin 6G (R6G)) and biological small molecule (adenine) on the aggregated AuNRs film, showing great potential of the aggregated AuNRs film as a convenient and powerful SERS substrate for biological tags and biological molecular detection.

Original languageEnglish
Pages (from-to)82-87
Number of pages6
JournalJournal of Colloid and Interface Science
Volume318
Issue number1
DOIs
Publication statusPublished - 1 Feb 2008
Externally publishedYes

Keywords

  • Au nanorods
  • Self-assembly
  • SERS

Fingerprint Dive into the research topics of 'Facile fabrication of large area of aggregated gold nanorods film for efficient surface-enhanced Raman scattering'. Together they form a unique fingerprint.

Cite this