Chiral Ionic Liquid Monolayer-Stabilized Gold Nanoparticles: Synthesis, Self-Assembly, and Application to SERS

Chiral ionic liquid monolayer-stabilized gold nanoparticles were synthesized in a two-phase liquid−liquid system and found to self-assemble into ringlike structures at the air/water interface. Control experiments with long-chain ILs revealed that the molecular structure of the CIL significantly affe...

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Bibliographic Details
Published in:Langmuir 2010-07, Vol.26 (14), p.12209-12214
Main Authors: Bai, Xiangtao, Li, Xinwei, Zheng, Liqiang
Format: Article
Language:English
Subjects:
Air
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Gold - chemistry
Ionic Liquids - chemistry
Materials: Nano-and Mesostructured Materials, Polymers, Gels, Liquid Crystals, Composites
Metal Nanoparticles - chemistry
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Spectrum Analysis, Raman
Stereoisomerism
Water - chemistry
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Summary:Chiral ionic liquid monolayer-stabilized gold nanoparticles were synthesized in a two-phase liquid−liquid system and found to self-assemble into ringlike structures at the air/water interface. Control experiments with long-chain ILs revealed that the molecular structure of the CIL significantly affects the formation of the gold nanoparticle ring structures. A possible mechanism based on Marangoni−Bénard convection in evaporating droplets was proposed. These gold nanoparticle structures were shown to yield a large SERS enhancement for Rhodamine 6G.
ISSN:0743-7463
1520-5827
DOI:10.1021/la101602a