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Title: Light and phospholipid driven structural transitions in nematic microdroplets

We studied the UV-irradiation and phospholipid driven bipolar-radial structural transitions within azoxybenzene nematic liquid crystal (LC) droplets dispersed in water. It was found that the UV-irradiation induced trans-cis isomerisation of LC molecules could enable structural transitions into radial-type configurations at a critical UV-irradiation time t{sub c}. In particular, we show that under appropriate conditions, a value of t{sub c} could sensitively fingerprint the concentration of phospholipid molecules present in LC-water dispersions. This demonstrated proof-of-principle mechanism could be exploited for development of sensitive detectors for specific nanoparticles (NPs), where value of t{sub c} reveals concentration of NPs.
Authors:
; ;  [1] ;  [2] ;  [3]
  1. Moscow State University of Instrument Engineering and Computer Science, Stromynka 20, Moscow 107996 (Russian Federation)
  2. Condensed Matter Physics Department, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana (Slovenia)
  3. (Slovenia)
Publication Date:
OSTI Identifier:
22350887
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 15; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CONCENTRATION RATIO; CONFIGURATION; DETECTION; DISPERSIONS; DROPLETS; IRRADIATION; ISOMERIZATION; LIQUID CRYSTALS; MOLECULES; NANOPARTICLES; PHOSPHOLIPIDS; ULTRAVIOLET RADIATION; VISIBLE RADIATION; WATER