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Title: Enhanced thermal stability of Ag nanorods through capping

Ag nanorods may serve as sensors in the detection of trace amounts of chemical agents, even single molecules, through surface enhanced Raman spectroscopy (SERS). However, thermal coarsening of Ag nanorods near room temperature limits their applications. This letter proposes the use of a thin oxide capping layer to enhance the thermal stability of Ag nanorods beyond 100 °C. Using electron microscopy characterization and SERS tests, the authors show that the proposed method is effective in stabilizing both morphology and sensitivity of Ag nanorods. The results of this work extend the applicability of Ag nanorods as chemical sensors to higher temperatures.
Authors:
;  [1] ;  [2] ;  [3]
  1. Department of Mechanical Engineering, University of Connecticut, Storrs, Connecticut 06269 (United States)
  2. Department of Mechanical Engineering, University of North Florida, Jacksonville, Florida 32224 (United States)
  3. Department of Mechanical and Industrial Engineering, Northeastern University, Boston, Massachusetts 02115 (United States)
Publication Date:
OSTI Identifier:
22392069
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 21; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ELECTRON MICROSCOPY; NANOSTRUCTURES; OXIDES; RAMAN SPECTROSCOPY; SENSORS; SILVER; SURFACES