technology Discussed by Investigators at University of Utah -->
By a News Reporter-Staff News Editor at Science Letter -- Current study results on Nanotechnology have been published. According to news reporting from Salt Lake City, Utah, by NewsRx journalists, research stated, "Freeze-fracture transmission electron microscopy study of the nanoscale structure of the so-called 'twist-bend' nematic phase of the cyanobiphenyl (CB) dimer molecule CB(CH2)(7)CB reveals stripe-textured fracture planes that indicate fluid layers periodically arrayed in the bulk with a spacing of d similar to 8.3 nm. Fluidity and a rigorously maintained spacing result in long-range-ordered 3D focal conic domains."
The news correspondents obtained a quote from the research from the University of Utah, "Absence of a lamellar X-ray reflection at wavevector q similar to 2 pi/d or its harmonics in synchrotron-based scattering experiments indicates that this periodic structure is achieved with no detectable associated modulation of the electron density, and thus has nematic rather than smectic molecular ordering. A search for periodic ordering with d similar to in CB(CH2) 7CB using atomistic molecular dynamic computer simulation yields an equilibrium heliconical ground state, exhibiting nematic twist and bend, of the sort first proposed by Meyer, and envisioned in systems of bent molecules by Dozov and Memmer."
According to the news reporters, the research concluded: "We measure the director cone angle to be 0(TB) similar to 25 degrees and the full pitch of the director helix to be p(TB) similar to 8.3 nm, a very small value indicating the strong coupling of molecular bend to director bend."
For more information on this research see: Chiral heliconical ground state of nanoscale pitch in a nematic liquid crystal of achiral molecular dimers. Proceedings of the National Academy of Sciences of the United States of America, 2013;110(40):15931-15936. Proceedings of the National Academy of Sciences of the United States of America can be contacted at: Natl Acad Sciences, 2101 Constitution Ave NW, Washington, DC 20418, USA. (National Academy of Sciences - www.nasonline.org/; Proceedings of the National Academy of Sciences of the United States of America - www.nasonline.org/publications/pnas/)
Our news journalists report that additional information may be obtained by contacting D. Chen, University of Utah, Dept. of Mat Sci & Engn, Salt Lake City, UT 84112, United States. Additional authors for this research include J.H. Porada, J.B. Hooper, A. Klittnick, Y.Q. Shen, M.R. Tuchband, E. Korblova, D. Bedrov, D.M. Walba, M.A. Glaser, J.E. Maclennan and N.A. Clark (see also technology.html">Nanotechnology).
Keywords for this news article include: Utah, Nanoscale, United States, Salt Lake City, Nanotechnology, Emerging Technologies, North and Central America
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