Journal
NANOSCALE RESEARCH LETTERS
Volume 10, Issue -, Pages -Publisher
SPRINGEROPEN
DOI: 10.1186/s11671-015-0962-8
Keywords
Silver nanorod array; Oblique angle deposition; SERS; Thermal evaporation
Funding
- Public Health and Welfare Research Program [2010-0020794]
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning, Korea [2013R1A1A2074801]
- Ultrashort Quantum Beam Facility Program through Gwangju Institute of Science and Technology
- National Research Foundation of Korea [2013R1A1A2074801] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Aligned silver nanorod (AgNR) array films were fabricated by oblique thermal evaporation. The substrate temperature during evaporation was varied from 10 to 100 degrees C using a home-built water cooling system. Deposition angle and substrate temperature were found to be the most important parameters for the morphology of fabricated films. Especially, it was found that there exists a critical temperature at similar to 90 degrees C for the formation of the AgNR array. The highest enhancement factor of the surface-enhanced Raman scattering (SERS), observed in the Ag films coated with benzenethiol monolayer, was similar to 6 x 10(7). Hot spots, excited in narrow gaps between nanorods, were attributed to the huge enhancement factor by our finite-difference time-domain (FDTD) simulation reflecting the real morphology.
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