A Thiol-Substituted Carotenoid Self-Assembles on Gold Surfaces

A Thiol-Substituted Carotenoid Self-Assembles on Gold Surfaces

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 spectrosco...

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Veröffentlicht in:The journal of physical chemistry. B 2002-03, Vol.106 (11), p.2933-2936
Hauptverfasser: Liu, Dezhong, Szulczewski, Gregory J, Kispert, Lowell D, Primak, Alex, Moore, Thomas A, Moore, Ana L, Gust, Devens
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container_end_page 2936
container_issue 11
container_start_page 2933
container_title The journal of physical chemistry. B
container_volume 106
creator Liu, Dezhong
Szulczewski, Gregory J
Kispert, Lowell D
Primak, Alex
Moore, Thomas A
Moore, Ana L
Gust, Devens
description 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 × 1014 AMC molecules/cm2 and the film thickness is ∼20 Å, respectively. FTIR-RAS and contact angle measurements suggest that the polyene chains are packed well enough to create a hydrophobic interface.
doi_str_mv 10.1021/jp011876a
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title A Thiol-Substituted Carotenoid Self-Assembles on Gold Surfaces
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