1H MAS NMR Study of Cysteine-Coated Gold Nanoparticles

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• 作者：Anuji Abraham ; Andrew J. Ilott ; Joel Miller ; Terry Gullion
• 刊名：The Journal of Physical Chemistry B
• 出版年：2012
• 出版时间：July 12, 2012
• 年：2012
• 卷：116
• 期：27
• 页码：7771-7775
• 全文大小：223K
• 年卷期：v.116,no.27(July 12, 2012)
• ISSN：1520-5207

文摘

¹H MAS NMR experiments were performed on gold nanoparticles coated with l-cysteine. The experiments show that l-cysteine molecules are zwitterions and support a structural model of cysteine forming two layers. The inner layer is composed of cysteine molecules chemisorbed to the gold surface via the sulfur atom. The outer layer interacts with the chemisorbed layer. The ¹H NMR suggests that the cysteine in the outer layer exhibits large amplitude motion about specific carbon鈥揷arbon bonds.