Theoretical study of molecular aggregation in Langmuir-Blodgett films using a dipolar interaction model |
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Authors: | Kui Han Haipeng Li Gang Tang Yuxi Wu Hongtao Wang Xiaopeng Shen |
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Affiliation: | College of Science, China University of Mining & Technology, Xuzhou, Jiangsu Province 221008, PR China |
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Abstract: | We present a dipole-dipole interaction model based on the classical electrostatic theory in the Langmuir-Blodgett (LB) films to calculate the state of aggregation of rod-like molecules with permanent electronic dipole moment. The dependence of the molecular aggregation spectral properties on the structure parameters in the Z-type LB films, such as the intra-layer molecular separation distance, the adjacent layer separation distance, the molecular orientation angle and the layer number of LB films have been studied. It is found that the H-J-type transition of the aggregation could be realized by modulating the structure parameters of the LB films. The theoretical results show a qualitative agreement with experimental data. |
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Keywords: | 68.47.Pe 87.15.Nn 87,15.Kg |
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