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Title: In-situ synthesis of Au nano particles of co-existing morphologies in liquid crystalline matrix

The present study describes the in-situ synthesis of Au nano particles (Au-NP) in the room temperature nematic liquid crystalline (LC) substance MBBA (N-4 methoxybenzylidene 4 butylaniline) without any external reducing or stabilizing agents. UV-Visible absorption and fluorescence spectroscopy clearly show formation of Au-NP within the LC matrix through the plasmon resonance peak for the NPs and EDAX measurements confirm this formation. Transmission electron Microscopy shows co-existence of spherical and prismatic NPs. FTIR spectroscopy shows a considerable shift in the C=N stretch band pointing to the location of the growth centre of the NPs. Polarization microscopy data indicates a definite phase ordering and texture transformation from Nematic to highly ordered smectic mesophase.
Authors:
;  [1]
  1. Surface Physics and Material Science Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Sector-1, Salt Lake, Kolkata-700064 (India)
Publication Date:
OSTI Identifier:
22490244
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1665; Journal Issue: 1; Conference: 59. DAE solid state physics symposium 2014, Tamilnadu (India), 16-20 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTROSCOPY; FLUORESCENCE SPECTROSCOPY; FOURIER TRANSFORMATION; GOLD; INFRARED SPECTRA; MATRIX MATERIALS; MORPHOLOGY; NANOPARTICLES; POLARIZATION; SYNTHESIS; TEMPERATURE RANGE 0273-0400 K; TEXTURE; TRANSMISSION ELECTRON MICROSCOPY; ULTRAVIOLET SPECTRA; VISIBLE SPECTRA