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Title: Change in Stripes for Cholesteric Shells via Anchoring in Moderation

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1406400
Grant/Contract Number:
FG02-05ER46199
Resource Type:
Journal Article: Published Article
Journal Name:
Physical Review X
Additional Journal Information:
Journal Volume: 7; Journal Issue: 4; Related Information: CHORUS Timestamp: 2017-11-01 16:32:44; Journal ID: ISSN 2160-3308
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Tran, Lisa, Lavrentovich, Maxim O., Durey, Guillaume, Darmon, Alexandre, Haase, Martin F., Li, Ningwei, Lee, Daeyeon, Stebe, Kathleen J., Kamien, Randall D., and Lopez-Leon, Teresa. Change in Stripes for Cholesteric Shells via Anchoring in Moderation. United States: N. p., 2017. Web. doi:10.1103/PhysRevX.7.041029.
Tran, Lisa, Lavrentovich, Maxim O., Durey, Guillaume, Darmon, Alexandre, Haase, Martin F., Li, Ningwei, Lee, Daeyeon, Stebe, Kathleen J., Kamien, Randall D., & Lopez-Leon, Teresa. Change in Stripes for Cholesteric Shells via Anchoring in Moderation. United States. doi:10.1103/PhysRevX.7.041029.
Tran, Lisa, Lavrentovich, Maxim O., Durey, Guillaume, Darmon, Alexandre, Haase, Martin F., Li, Ningwei, Lee, Daeyeon, Stebe, Kathleen J., Kamien, Randall D., and Lopez-Leon, Teresa. 2017. "Change in Stripes for Cholesteric Shells via Anchoring in Moderation". United States. doi:10.1103/PhysRevX.7.041029.
@article{osti_1406400,
title = {Change in Stripes for Cholesteric Shells via Anchoring in Moderation},
author = {Tran, Lisa and Lavrentovich, Maxim O. and Durey, Guillaume and Darmon, Alexandre and Haase, Martin F. and Li, Ningwei and Lee, Daeyeon and Stebe, Kathleen J. and Kamien, Randall D. and Lopez-Leon, Teresa},
abstractNote = {},
doi = {10.1103/PhysRevX.7.041029},
journal = {Physical Review X},
number = 4,
volume = 7,
place = {United States},
year = 2017,
month =
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevX.7.041029

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  • This paper describes the spectral broadening of cholesteric liquid crystal film prepared from a blend comprising a cross-linkable liquid crystal polymer and a non-cross-linkable low-molecular-weight liquid crystal. The spectral broadening arises from the formation of gradient pitch across the film thickness. It is shown that both phase-separation and in situ swelling during photopolymerization are important mechanisms for the resulting film structure. The surface anchoring is important to achieve high wavelength- and polarization-selective reflectance.
  • Certain physicochemical characteristics of particles of the cholesteric liquid-crystal dispersions of complexes of double-stranded nucleic acids with rare earth elements have been determined. It is shown for the first time that the binding of the rare earth cations to linear nucleic acid molecules ordered in the structure of particles of the cholesteric liquid crystal dispersions is accompanied not only by amplification of the abnormal band in the circular dichroism spectrum, but also by the disappearance of the characteristic maximum on the X-ray scattering curves for small angles. The (cholesteric 1-cholesteric 2) transition induced by rare earth cations is an examplemore » of the operation of a microscopic machine consisting of spatially ordered nucleic acid molecules. Particles of the cholesteric liquid crystal dispersions of nucleic acid complexes with rare earth elements hold the abnormal optical properties for a long time.« less
  • Here, we describe a new method to measure the activation energy required to remove a strongly-bound membrane-associated protein from a lipid membrane (anchoring energy). It is based on measuring the rate of release of a liposome-bound protein during centrifugation on a sucrose gradient as a function of time and temperature. The method was used to determine anchoring energy for the soluble dengue virus envelope protein (sE) strongly bound to 80:20 POPC:POPG liposomes at pH 5.5. We also measured the binding energy of sE at the same pH for the initial, predominantly reversible, phase of binding to a 70:30 PC:PG lipidmore » bilayer. The anchoring energy (37 +/- 1.7 kcal/mol, 20% PG) was found to be much larger than the binding energy (7.8 +/- 0.3 kcal/mol for 30% PG, or est. 7.0 kcal/mol for 20% PG). This is consistent with data showing that free sE is a monomer at pH 5.5, but assembles into trimers after associating with membranes. But, trimerization alone is insufficient to account for the observed difference in energies, and we conclude that some energy dissipation occurs during the release process. This new method to determine anchoring energy should be useful to understand the complex interactions of integral monotopic proteins and strongly-bound peripheral membrane proteins with lipid membranes.« less
  • Cerenkov emission in cholesteric liquid crystals is examined theoretically for first-order reflection. The energy lost by a particle per unit frequency per unit azimuth angle as a result of this emission is shown to contain one forbidden band and two polarization-forbidden bands as well as, in general, six square-root singularities on the boundaries of these forbidden bands. It is shown that the radiation intensity on the boundaries of the reflection regions exhibits well-defined beats, and is proportional to the fourth power of the specimen thickness at the intensity maxima. When the particle moves at right-angles to the optical axis ofmore » the cholesteric, the differential radiative energy loss is a rapidly-varying function of the position of the particle trajectory.« less