Hydrogen-Bonding Recognition-Induced Color Change of Gold Nanoparticles for Visual Detection of Melamine in Raw Milk and Infant Formula

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• 作者：Kelong Ai ; Yanlan Liu ; Lehui Lu
• 刊名：Journal of the American Chemical Society
• 出版年：2009
• 出版时间：July 15, 2009
• 年：2009
• 卷：131
• 期：27
• 页码：9496-9497
• 全文大小：154K
• 年卷期：v.131,no.27(July 15, 2009)
• ISSN：1520-5126

文摘

The color change induced by triple hydrogen-bonding recognition between melamine and a cyanuric acid derivative grafted on the surface of gold nanoparticles can be used for reliable detection of melamine. Since such a color change can be readily seen by the naked eye, the method enables on-site and real-time detection of melamine in raw milk and infant formula even at a concentration as low as 2.5 ppb without the aid of any advanced instruments.