Ag Nanodot Array as a Platform for Surface-Enhanced Raman Scattering
- Ag Nanodot Array as a Platform for Surface-Enhanced Raman Scattering
- 정미; 김승규; 이석; 김재헌; 우덕하
- Ag nanodot array; SERS; Plasmonic material; Nanoporous alumina mask; Methylene Blue
- Issue Date
- Journal of nanophotonics
- VOL 7, NO 1, 073798-11-073798-8
- Well-ordered Ag nanodot array on indium-tin-oxide (ITO) glass is adopted as a sensor
platform based on surface-enhanced Raman scattering (SERS). SERS has attracted extensive
attention in the development of sensitive chemical or biological sensors due to its property
of the amplification of electromagnetic fields on a metal nanostructure. The key issue for
the applications of SERS is to secure the fabrication technique of a noble metal nanostructured
surface. For an SERS-active surface with stability and reproducibility, a Ag nanodot array is
fabricated on the ITO glass using a nanoporous alumina mask with uniform through holes.
The signal intensity of SERS from methylene blue (MB) adsorbed on the Ag nanodot array
showed much stronger scattering than the one from the Ag film of 50-nm thick. The SERS
intensity on the Ag nanodot array is consistently enhanced by increased concentration of
MB. These results confirm that the Ag nanodot array on ITO glass can be utilized as a stable
platform for the sensitive detection of chemical materials based on SERS.
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