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1 November 1996 Molecular length dependent polarizability
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Electric Field Induced Second Harmonic GEneration (EFISH) and the electro-optic Kerr effect were applied to solutions of double stranded DNA, in which the average strand length varied from 2958 base pairs to 140 base pairs. This size range covers the transition from the `rod-like' model (which applies to samples < about 300 base pairs) to the `worm- like' model. In both these electro-optic measurements the electric dipole moment is primarily ionic in nature, and shows a saturating length dependence, although saturation occurred at different lengths. Saturation occurred at longer lengths for EFISH than for the Kerr effect.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Maryanne C. J. Large, Werner J. Blau, David T. Croke, Peter McWilliam, and Francois Kajzar "Molecular length dependent polarizability", Proc. SPIE 2852, Nonlinear Optical Properties of Organic Materials IX, (1 November 1996);

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