Lattice constants of Langmuir-Blodgett films measured by atomic force microscopy |
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| Institution: | 1. Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran;2. Materials Research Group, Department of Mechanical Engineering, University of Southampton, Southampton SO17 1BJ, United Kingdom |
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| Abstract: | Langmuir-Blodgett (LB) films are examples of soft organic and related biological samples. Therefore it is essential to make sure that the mechanical scanning process does not disturb the specimen. We describe atomic force microscopy measurements of the lattice constants of Cd arachidate LB films. A lattice constant dhk is revealed correctly by scanning parallel to the corresponding lattice line hk]. Scanning in deviating directions enlarges the lattice spacing. The phenomena are explained with a simple model. Previous studies where such artefacts have not been reported are discussed. |
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