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Characterization of order in langmuir-blodgett monolayers by unenhanced Raman spectroscopy |
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| Institution: | 1. Department of Agriculture, University of Napoli Federico II, 80055 Portici NA, Italy;2. Department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, POB 653, Beer-Sheva 84105, Israel;3. Department of Chemical Sciences, University of Napoli Federico II, 80126 Napoli, Italy;1. The Pennsylvania State University, University Park, PA 16802, USA;2. Idaho National Laboratory, Idaho Falls, ID 83415, USA;3. The Pennsylvania State University, University Park, PA 16802, USA |
| Abstract: | Multichannel Raman spectroscopy utilizing a CCD detector is shown to be a sensitive technique for obtaining unenhanced Raman spectra of monolayer Langmuir-Blodgett films. Spectra of the C-H stretching region of cadmium stearate films with thicknesses from 1 to 27 layers reveal significant disruption of lateral packing and conformational disorder in the first few layers. Pretransitional disordering of the hydrocarbon tails is observed upon heating near to but below the melting point. |
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