Dynamics of nanoscopic water: Vibrational echo and infrared pump-probe studies of reverse micelles

Article Abstract:

The dynamics of water confined on nanometer length scales in AOT reverse micelles were studied with ultrafast infrared resolved stimulated vibrational echo and pump-probe spectroscopies. The vibrational echo data for the smallest reverse micelle displays a dependence on the detection wavelength which may indicate that multiple ensembles of water molecules are being observed.

Analysis, Water, Spectrum analysis, Spectroscopy, Micelles, Properties

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Ultrafast to slow orientational dynamics of a homeotropically aligned nematic liquid crystal

Article Abstract:

A study is conducted on the orientational dynamics of a homeotropically aligned nematic liquid crystal, 4'-pentyl-4-biphenylcarbonitrile (5-CB) using optical heterodyne detected optical Kerr effect experiments. The results suggest that temperature-dependent orientational dynamics in the nematic phase are very different than those observed in the isotropic phase.

All Other Basic Organic Chemical Manufacturing, Electronic components, not elsewhere classified, Other Electronic Component Manufacturing, Industrial Organic Chemicals, Liquid Crystals, Nitriles, Molecular dynamics

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Time domain optical studies of dynamics in supercooled o-terphenyl: Comparison to mode coupling theory on fast and slow time scales

Article Abstract:

Orientation relaxation of supercooled o-terphenyl (OTP) is evaluated over a wide range of temperatures and time scales by using optical heterodyne detected optical Kerr effect techniques. The dynamics exhibited by the supercooled glass-forming liquid OTP in the relaxation curves present features in agreement with the predictions of mode-coupling theory (MCT).

Chemistry, Physical and theoretical, Physical chemistry, Relaxation phenomena, Relaxation (Physics), Phenyl group

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