| Characterization of self-assembled monolayers of thiols on Au(111) |
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| 引用本文： | 邓文礼,杨大本,方晔,白春礼. Characterization of self-assembled monolayers of thiols on Au(111)[J]. 中国科学B辑(英文版), 1996, 0(3) |
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| 作者姓名： | 邓文礼 杨大本 方晔 白春礼 |
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| 作者单位： | Institute of Chemistry，Chinese Academy of Sciences，Beijing 100080，China.，Department of Materials Science and Engineering，University of Electronic Science and Technology of China，Chengdu 610054，China，Institute of Chemistry，Chinese Academy of Sciences，Beijing 100080，China，Institute of Chemistry，Chinese Academy of Sciences，Beijing 100080，China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China |
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| 摘 要： | Self-assembled monolayers (SAMs) of n-butanethiol, n-dodecanethiol and their equimolar mixture on Au(111) were prepared and characterized by ellipsometry, contact angle measurement, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). Results revealed that these SAMs are oriented ultrathin films with the thickness of nanometer scale, and the SAMs were influenced by the molecular chain length, the lattice orientation and cleanliness of the substrates. The surface of the longer chain SAM is hydrophobic. The thicknesses of three SAMs of n-butanethiol, n-dodecanethiol and their mixture revealed by ellipsometry and XPS are about 0.59 - 0.67nm, 1.60- 1.69 nm and 1.23 - 1.32nm, respectively. AFM images further demonstrated that the SAM formed by the mixture has some microdomains with two different thicknesses.
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Characterization of self-assembled monolayers of thiols on Au(111) |
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| DENG Wenli YANG Daben. Characterization of self-assembled monolayers of thiols on Au(111)[J]. Science in China(Chemistry), 1996, 0(3) |
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| Authors: | DENG Wenli YANG Daben |
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| Abstract: | Self-assembled monolayers (SAMs) of n-butanethiol, n-dodecanethiol and their equimolar mixture on Au(111) were prepared and characterized by ellipsometry, contact angle measurement, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). Results revealed that these SAMs are oriented ultrathin films with the thickness of nanometer scale, and the SAMs were influenced by the molecular chain length, the lattice orientation and cleanliness of the substrates. The surface of the longer chain SAM is hydrophobic. The thicknesses of three SAMs of n-butanethiol, n-dodecanethiol and their mixture revealed by ellipsometry and XPS are about 0.59 - 0.67nm, 1.60- 1.69 nm and 1.23 - 1.32nm, respectively. AFM images further demonstrated that the SAM formed by the mixture has some microdomains with two different thicknesses. |
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| Keywords: | n-butanethiol n-dodecanethiol self-assembled monolayers. |
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