Coexistence of Different Structural Phases in Thioaromatic Monolayers on Au(111)
| العنوان: | Coexistence of Different Structural Phases in Thioaromatic Monolayers on Au(111) |
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| المؤلفون: | Manfred Buck, Alexander Birkner, Claus Fuxen, Christof Wöll, Waleed Azzam, Hai-Tao Rong |
| المصدر: | Langmuir. 19:4958-4968 |
| بيانات النشر: | American Chemical Society (ACS), 2003. |
| سنة النشر: | 2003 |
| مصطلحات موضوعية: | Yield (engineering), Chemistry, Surfaces and Interfaces, Substrate (electronics), Molecular axis, Condensed Matter Physics, law.invention, Crystallography, Adsorption, law, Phase (matter), Monolayer, Electrochemistry, Molecule, General Materials Science, Scanning tunneling microscope, Spectroscopy |
| الوصف: | Self-assembled monolayers formed by adsorption of 4-methyl-4'-mercaptobiphenyl, CH 3 -(C 6 H 4 ) 2 -SH (BPT), on Au(111) have been studied using scanning tunneling microscopy. The results show that with increasing coverage (resulting from longer immersion times) BPT forms a series of different structural phases with different molecular arrangements, closely resembling the behavior reported previously for n-alkanethiolate adlayers. For short immersion times, striped structures are observed (a and β), where the molecules are orientated with their axes parallel to the surface. Longer immersion times yield additional phases, namely, an ordered Χ-phase, where the molecules are proposed to be oriented with their molecular axis tilted away from the surface, a disordered δ phase, and, finally, a densely packed (2√3 × √3) ∈ phase where the molecular axes are orientated almost upright. Unexpectedly, for BPT after adsorption small islands are seen on the Au substrate instead of the etch pits commonly observed after formation of organothiolate adlayers. |
| تدمد: | 1520-5827 0743-7463 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::c8cfc8a27c99a14528c7e924b99ec19a https://doi.org/10.1021/la020868y |
| رقم الأكسشن: | edsair.doi...........c8cfc8a27c99a14528c7e924b99ec19a |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 15205827 07437463 |
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