Interfacial architecture on the fractal support: polycrystalline gold films as support for self-assembling monolayers
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Interfacial architecture on the fractal support: polycrystalline gold films as support for self-assembling monolayers
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| Creator |
Snopoka, B.
Strizhak, P. Kostyukevich, E. Serebriy, V. Lysenko, S. Shepeliavii, P. Priatkin, S.L. Kostuykevich, S. Shirshov, Yu. Venger, E. |
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| Description |
Multifractal analysis is performed for description of the surface topography of thin polycrystalline gold film. Its structure was modified by annealing at different temperatures in the range 20÷200 ⁰C and films were imaged by Atomic Force Microscopy. Image was analyzed as a collection of layers taken parallel to the mean surface. Fractal subsets with different scaling properties were described by multifractal divergence (e.g. the difference between maximal and minimal values of the f (a) spectrum). This allowed to highlight the effect of the temperature of film annealing on the surface structure. We found that fractal diversity jumps down in the temperature range 130÷140 ⁰C. Therefore, phase transition occurs in the system. Below the temperature of the phase transition the surface topography is characterized by high roughness and existence of small-scale irregularities. At critical temperature the surface structure undergoes morphological transition caused by melting of small-scale irregularities. The melting also results in a decrease of the surface roughness due to the flowing down of gold crystallites. A notable feature of the approach is its ability to highlight a possible influence of substrate structure on the adsorption/self-assembling processes at the interface, which may be disturbed by the surface irregularities. The typical and expressive example taken from the self-assembling on the polycrystalline substrate. Particularly, substrate topography determines an order of thiols layers resulting in peculiarities of chemical functionality of obtained material. It was shown that formation of well-ordered monolayers of ω-substituted alkanethiols on gold films occurs only if the freshly evaporated gold films were annealed at temperature more than ca.120 ⁰C. The analysis of surface peculiarities allows suggesting that this behavior is caused by disappearance of short-scale multifractal structures. Therefore, the multifractal analysis opens a new avenue for both characterization and direct prediction of surface properties. Particularly, it gives a hint regarding a formation of the Euclidean two-imensional structures at the multifractal substrates.
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| Date |
2017-06-10T08:07:43Z
2017-06-10T08:07:43Z 1999 |
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| Type |
Article
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| Identifier |
Interfacial architecture on the fractal support: polycrystalline gold films as support for self-assembling monolayers / B. Snopok, P. Strizhak, E. Kostyukevicha, V. Serebriy, S. Lysenko, P. Shepeliavii, S.L. Priatkin, S. Kostuykevich, Yu. Shirshov, E. Venger // Semiconductor Physics Quantum Electronics & Optoelectronics. — 1999. — Т. 2, № 3. — С. 86-97. — Бібліогр.: 30 назв. — англ.
1560-8034 PACS: 61.66.Hq, 61.43.Hv, 61.72.Cc, 68.35.Bs, 68.35.Rh, 67.70.+n, 81.65.Ya http://dspace.nbuv.gov.ua/handle/123456789/119875 |
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| Language |
en
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| Relation |
Semiconductor Physics Quantum Electronics & Optoelectronics
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| Publisher |
Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України
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