Part III: Surface-enhanced Raman scattering of amino acids and their homodipeptide monolayers deposited onto colloidal gold surface
Part III: Surface-enhanced Raman scattering of amino acids and their homodipeptide monolayers deposited onto colloidal gold surface
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DOI：
10.1366/000370205775142520
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发表时间：
2005-12-01
影响因子：
3.5
通讯作者：
Proniewicz, LM
中科院分区：
文献类型：
--
作者：
Podstawka, E;Ozaki, Y;Proniewicz, LM
采用表面增强拉曼散射（SERS）技术测量了沉积在胶体金表面上的各种氨基酸单层：l -蛋氨酸（Met）、l -半胱氨酸（Cys）、l -甘氨酸（Gly）、l -亮氨酸（Leu）、l -苯丙氨酸（Phe）和l -脯氨酸（Pro）及其同二肽（Met-Met、Cys-Cys、Gly-Gly、Leu-Leu、Phe-Phe和Pro-Pro）。通过对SERS光谱的详细分析，预测了氨基酸及其同型二肽的取向，以及它们的官能团与金表面的特定竞争相互作用。所进行的分析使我们能够为金表面上的每个氨基酸和同型二肽提出特定的表面几何形状。此外，我们比较了这些分子在胶体金和胶体银表面吸附的结构。
Surface-enhanced Raman scattering (SERS) spectra were measured for monolayers of various amino acids: L-methionine (Met), L-cysteine (Cys), L-glycine (Gly), L-leucine (Leu), L-phenylalanine (Phe), and L-proline (Pro) and their homodipeptides (Met-Met, Cys-Cys, Gly-Gly, Leu-Leu, Phe-Phe, and Pro-Pro) deposited onto a colloidal gold surface. Orientation of amino acids and their homodipeptides, as well as specific-competitive interactions of their functional groups with the gold surface, were predicted by detailed spectral analysis of the obtained SERS spectra. The analysis performed allowed us to propose a particular surface geometry for each amino acid and homodipeptide on the gold surface. In addition, we compared the structures of these molecules adsorbed on colloidal gold and silver surfaces.