Giant domain formation in Langmuir–Blodgett films based on Alkylammonium–Au(dmit)2 salt
| Autor: | Michio Sugi, Yasuhiro F. Miura, K. Hayashi, M. Kitao, M. Takagi, Haruki Matsui |
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| Rok vydání: | 2008 |
| Předmět: |
Superconductivity
Fabrication Chemistry Metals and Alloys Nanotechnology Surfaces and Interfaces Crystallographic defect Langmuir–Blodgett film Surfaces Coatings and Films Electronic Optical and Magnetic Materials Metal Chemical physics visual_art Microscopy Materials Chemistry visual_art.visual_art_medium Grain boundary Thin film |
| Zdroj: | Thin Solid Films. 516:2518-2521 |
| ISSN: | 0040-6090 |
| Popis: | The crossed polarized-light microscopy has revealed that the as-deposited LB film of the 2C 14 –Au(dmit) 2 salt consists of giant domains of several hundred microns, which have a uni-axial molecular arrangement. By the electrochemical oxidation, the giant domains disappear and smaller domains of 5–10 μm appear. According to the atomic force microscopy (AFM) observation, the as-deposited film consists of domains of several microns but it appears that the observed domains are fragments formed by cracks generated in much larger domains, as seen by the shapes. It is hypothesized that there exist giant domains at the air/water interface but cracks are made during the transfer process. Thus, the uni-axial molecular arrangement is kept over the macroscopic range. Considering the random potentials set up by grain boundaries and/or defects, fabrication of the crack-free LB film is considered to be indispensable for realizing metallic properties down to much lower temperatures and global superconductivity. |
| Databáze: | OpenAIRE |
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