Journal
ACS NANO
Volume 6, Issue 6, Pages 5190-5197Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn300947n
Keywords
plasmonics; laser-direct-writing technique; hotspot; fluorescence enhancement; SERS
Categories
Funding
- National Science Council, Taiwan [99-2120-M-002-012, 99-2911-1-002-127, 100-2120-M-002-008, 100-2923-M-002-007-MY3]
- National Center for Theoretical Sciences, Taipei Office, Molecular Imaging Center of National Taiwan University
- National Center for High-Performance Computing, Taiwan
- U.S. Air Force Office of Scientific Research [FA9550-10-1-0417]
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Using a femtosecond laser, we have transformed the laser-direct-writing technique into a highly efficient method that can process AgOx thin films into Ag nanostructures at a fast scanning rate of 2000 mu m(2)/min. The processed AgOx thin films exhibit broad-band enhancement of optical absorption and effectively function as active SERS substrates. Probing of the plasmonic hotspots with dyed polymer beads indicates that these hotspots are uniformly distributed over the treated area.
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