| Original Articles |
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Miscibility and Molecular Orientation of Carbazole in Mixed Langmuir and Langmuir--Blodgett Films |
| Md. N. Islam;D. Bhattacharjee;S. A. Hussain |
| Department of Physics, Tripura University, Suryamaninagar-799130, Tripura, India |
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| Cite this article: |
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Md. N. Islam, D. Bhattacharjee, S. A. Hussain 2007 Chin. Phys. Lett. 24 2044-2047 |
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Abstract We report the miscibility and molecular orientation of carbazole (CA) molecules in the mixed Langmuir and Langmuir--Blodgett (LB) films of CA
in polymethyl methacrylate (PMMA) and stearic acid (SA) matrices. The π-A isotherm confirms the formation of stable Langmuir films of CA mixed with either PMMA or SA at air--water interface. Characteristics of area per molecule versus molefraction and collapse pressure versus molefraction reveal complete demixing of CA and the matrix PMMA/SA molecules in the mixed films. Absorption spectroscopy certainly confirms the fact that CA molecules have preferred orientation on the substrate of the LB films.
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| Keywords:
68.37.-d
68.18.-g
68.47.Pe
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Received: 10 April 2007
Published: 25 June 2007
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| PACS: |
68.37.-d
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(Microscopy of surfaces, interfaces, and thin films)
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68.18.-g
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(Langmuir-Blodgett films on liquids)
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68.47.Pe
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(Langmuir-Blodgett films on solids; polymers on surfaces; biological molecules on surfaces)
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