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Title: Localized surface plasmon behavior of Ag-Cu alloy nanoparticles stabilized by rice-starch and gelatin

The purpose of this communication was to understand localized surface plasmon behavior of a series of Ag-Cu alloy nanoparticles capped by rice-starch and gelatin. The structures of dried powders were investigated with the help of X-ray diffraction. The analysis revealed Ag-rich and Cu-rich phases with maximum solid solubility of Cu ∼9 atom per cent; 8 atom per cent and Ag ∼ 16 atom per cent; 14 atom per cent in rice-starch and gelatin capped samples respectively. Transmission electron microscope was used for knowing the particle size as well as to supplement FCC phase formations of Ag-rich and Cu-rich solid phases arrived at based on X-ray diffraction studies. The UV-Vis spectra of sols were examined for the formation and stability of alloy nanoparticles. The temporal evolution of LSPR curves gave us to assert that the sol is stable for more than two months. Small angle X-ray scattering in the sol state was extensively utilized to understand nature of suspensions in terms of fractals. Such a study is important for having a correlation between LSPR behaviors with those of nanoparticle dispersion in aqueous media. It is believed that this work will be a contribution to the emerging field of plasmonics that includemore » applications in the area of photophysical processes and photochemical reactions.« less
Authors:
;  [1] ; ;  [2]
  1. Department of Metallurgical Engineering, IIT (BHU), Varanasi and DST Unit on Nanoscience and Technology, BHU, Varanasi-221 005 (India)
  2. DefenceMetallurgical Research Laboratory, KanchanBagh, Hyderabad-500058 (India)
Publication Date:
OSTI Identifier:
22492122
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 10; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COPPER ALLOYS; CORRELATIONS; FCC LATTICES; FRACTALS; GELATIN; NANOPARTICLES; PARTICLE SIZE; PHOTOCHEMICAL REACTIONS; POWDERS; SILVER ALLOYS; SMALL ANGLE SCATTERING; SOLIDS; SOLS; STARCH; SURFACES; SUSPENSIONS; TRANSMISSION ELECTRON MICROSCOPY; ULTRAVIOLET SPECTRA; VISIBLE SPECTRA; X-RAY DIFFRACTION