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CX Wu

Publications and source records attributed to CX Wu.

4 recordsLinked to original sources
PubMed2000

Analysis of weak-anchoring effect in nematic liquid crystals

A generalized Rapini-Papoular-type anchoring energy formula [J. Phys. (Paris) Colloq. 30, C4-54 (1969)] with two coupling constants is established through a second-order spherical-harmonic expansion. Using this formula, we analyze the threshold and saturation properties of twisted nematic devices with unidirectional planar anchorage, assuming that the azimuthal and polar anchoring strengths are both finite and distinct from each other. We also discuss the voltage-controlled-twist effect [G. P. Bryan-Brown et al., Nature (London) 392, 365 (1998)]. It is shown that the predicted behavior is consistent with the experimental observations.

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PubMed1999

Analysis of the Dielectric Relaxation Property of Phospholipid Monolayers by Maxwell Displacement Current Measurement.

Using the Maxwell displacement current (MDC) measurement with alternating monolayer compression and expansion process, the dielectric property of monolayers has been investigated. The monolayer expansion and compression processes were analyzed on the basis of the Debye theory, and the relaxation time of dl-alpha-dilaurylphosphatidylcholine (DLPC) was determined using a whole curve of MDCs. It was suggested that the interaction among molecules makes a contribution to the dielectric relaxation phenomena, although the change in the orientational order of polar molecules is a main contribution of MDC. Copyright 1999 Academic Press.

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