Spontaneous formation of two-dimensional gold networks at the air-water interface and their application in Surface-Enhanced Raman Scattering (SERS)

Hongjun Chen, Yuling Wang, Heqing Jiang, Baifeng Liu, Shaojun Dong*

*Corresponding author for this work

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Two-dimensional (2-D) gold networks were spontaneously formed at the air-water interface after HAuCl4 reacted with fructose at 90°C in a sealed vessel, in a reaction in which fructose acted as both a reducing and a protecting agent. Through fine-tuning of the molar ratio of HAuCl4 to fructose, the thus-formed 2-D gold networks can be changed from a coalesced pattern to an interconnected pattern. In the coalesced pattern, some well-defined singlesaystalline gold plates at the micrometer-scale could be seen, while in the interconnected pattern, many sub-micrometer particles and some irregular gold plates instead of well-defined gold plates appeared. It is also found that the 2-D gold networks in the form of an interconnected pattern can be used as substrates for surface-enhanced Raman scattering (SERS) because of the strong localized electromagnetic field produced by the gaps between the neighboring particles in the 2-D gold networks.

Original languageEnglish
Pages (from-to)1771-1776
Number of pages6
JournalCrystal Growth and Design
Volume7
Issue number9
DOIs
Publication statusPublished - Sep 2007
Externally publishedYes

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