Spontaneous Formation of Two-Dimensional Gold Networks at the Air-Water Interface and Their Application in Surface-Enhanced Raman Scattering (SERS)
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- 作者：Hongjun Chen ; Yuling Wang ; Heqing Jiang ; Baifeng Liu ; Shaojun Dong
- 刊名：Crystal Growth & Design
- 出版年：2007
- 出版时间：September 2007
- 年：2007
- 卷：7
- 期：9
- 页码：1771 - 1776
- 全文大小：848K
- 年卷期：v.7,no.9(September 2007)
- ISSN：1528-7505
文摘
Two-dimensional (2-D) gold networks were spontaneously formed at the air-water interface after HAuCl4 reactedwith fructose at 90 
C in a sealed vessel, in a reaction in which fructose acted as both a reducing and a protecting agent. Throughfine-tuning of the molar ratio of HAuCl4 to fructose, the thus-formed 2-D gold networks can be changed from a coalesced patternto an interconnected pattern. In the coalesced pattern, some well-defined single-crystalline gold plates at the micrometer-scale couldbe seen, while in the interconnected pattern, many sub-micrometer particles and some irregular gold plates instead of well-definedgold plates appeared. It is also found that the 2-D gold networks in the form of an interconnected pattern can be used as substratesfor surface-enhanced Raman scattering (SERS) because of the strong localized electromagnetic field produced by the gaps betweenthe neighboring particles in the 2-D gold networks.
C in a sealed vessel, in a reaction in which fructose acted as both a reducing and a protecting agent. Throughfine-tuning of the molar ratio of HAuCl4 to fructose, the thus-formed 2-D gold networks can be changed from a coalesced patternto an interconnected pattern. In the coalesced pattern, some well-defined single-crystalline gold plates at the micrometer-scale couldbe seen, while in the interconnected pattern, many sub-micrometer particles and some irregular gold plates instead of well-definedgold plates appeared. It is also found that the 2-D gold networks in the form of an interconnected pattern can be used as substratesfor surface-enhanced Raman scattering (SERS) because of the strong localized electromagnetic field produced by the gaps betweenthe neighboring particles in the 2-D gold networks.