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|a E 1.99:1530276
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|a Structure of nanoscale-pitch helical phases
|h [electronic resource] :
|b Blue phase and twist-bend nematic phase resolved by resonant soft X-ray scattering.
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|a Washington, D.C. :
|b United States. Department of Energy. Office of Basic Energy Sciences ;
|a Oak Ridge, Tenn. :
|b distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
|c 2017.
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|a p. 6694-6699 :
|b digital, PDF file.
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|a text
|b txt
|2 rdacontent.
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|a computer
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|2 rdamedia.
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|a online resource
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|a Published through SciTech Connect.
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|a 08/18/2017.
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|a "ark:/13030/qt7b27z977"
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|a Soft Matter 13 38 ISSN 1744-683X; SMOABF AM.
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|a Mirosław Salamończyk; Nataša Vaupotič; Damian Pociecha; Cheng Wang; Chenhui Zhu; Ewa Gorecka.
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|a Periodic structures of phases with orientational order of molecules but homogenous electron density distribution: a short pitch cholesteric phase, blue phase and twist-bend nematic phase, were probed by resonant soft X-ray scattering (RSoXS) at the carbon K-edge. The theoretical model shows that in the case of a simple heliconical nematic structure, two resonant signals corresponding to the full and half pitch band should be present, while only the full pitch band is observed experimentally. This suggests that the twist-bend nematic phase has a complex structure with a double-helix built of two interlocked, shifted helices. We confirm that the helical pitch in the twist-bend nematic phase is in a 10 nm range for both the chiral and achiral materials. We also show that the symmetry of the blue phase can be unambiguously determined through a resonant enhancement of the X-ray diffraction signals, by including polarization effects, which are found to be an important indicator in phase structure determination.
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|b AC02-05CH11231.
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| 650 |
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|a Inorganic, Organic, Physical, And Analytical Chemistry.
|2 edbsc.
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| 710 |
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|a Lawrence Berkeley National Laboratory.
|4 res.
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|a United States.
|b Department of Energy.
|b Office of Basic Energy Sciences.
|4 spn.
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|a United States.
|b Department of Energy.
|b Office of Scientific and Technical Information.
|4 dst.
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|u http://www.osti.gov/scitech/biblio/1530276
|z Full Text (via OSTI)
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|a .b107874817
|b 10-03-19
|c 10-03-19
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|a web
|b 10-03-19
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|s aa475f90-545d-5b26-adb1-945ec428b1fb
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|p Can circulate
|a University of Colorado Boulder
|b Online
|c Online
|d Online
|e E 1.99:1530276
|h Superintendent of Documents classification
|i web
|n 1
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