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A Thiol-Substituted Carotenoid Self-Assembles on Gold Surfaces

机译:金表面上的硫醇取代类胡萝卜素自组装体

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摘要

A thiol-substituted carotenoid, 7'-apo-7'-(4-mercaptomethylphenyl)-β-carotene, (AMC) was allowed to self-assemble on polycrystalline gold surfaces. The stability, packing density, optical absorption, and hydrophobicity of the resulting monolayers were investigated with X-ray photoelectron spectroscopy (XPS), Fourier transform infrared reflection-absorption spectroscopy (FTIR-RAS), UV-Vis spectroscopy, spectroscopic ellipsometry, and contact angle measurements. XPS and spectroscopic ellipsometry measurements reveal the saturation coverage is ~4 * 10~(14) AMC molecules/cm~2 and the film thickness is ~20 A, respectively. FTIR-RAS and contact angle measurements suggest that the polyene chains are packed well enough to create a hydrophobic interface.
机译:使硫醇取代的类胡萝卜素7'-apo-7'-(4-巯基甲基苯基)-β-胡萝卜素(AMC)在多晶金表面上自组装。用X射线光电子能谱(XPS),傅立叶变换红外反射吸收光谱(FTIR-RAS),紫外可见光谱,椭圆偏振光谱和接触法研究了所得单层的稳定性,堆积密度,光吸收和疏水性角度测量。 XPS和椭圆偏振光谱法测量结果表明,饱和覆盖率为〜4 * 10〜(14)AMC分子/ cm〜2,膜厚为〜20A。 FTIR-RAS和接触角测量结果表明,多烯链堆积得足够好,可以形成疏水界面。

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