Enhanced thermal stability of Ag nanorods through capping

Journal Article · Mon Nov 24 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4902829· OSTI ID:22392069

Bachenheimer, Lou; Elliott, Paul ^[1]; Stagon, Stephen ^[2]; Huang, Hanchen ^[3]

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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)

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.

• OSTI ID: 22392069
• Journal Information: Applied Physics Letters, Vol. 105, Issue 21; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRON MICROSCOPY
NANOSTRUCTURES
OXIDES
RAMAN SPECTROSCOPY
SENSORS
SILVER
SURFACES