TY - JOUR
T1 - Thickness of a metallic film, in addition to its roughness, plays a significant role in SERS activity
AU - Lee, Changwon
AU - Robertson, Christopher S.
AU - Nguyen, An H.
AU - Kahraman, Mehmet
AU - Wachsmann-Hogiu, Sebastian
PY - 2015/6/29
Y1 - 2015/6/29
N2 - In this paper we evaluate the effect of roughness and thickness of silver film substrates, fabricated on glass and polydimethylsiloxane (PDMS) templates, on surface-enhanced Raman Spectroscopy (SERS) activity. While the silver substrates obtained on glass templates exhibit nm-scale roughness, the silver substrates on PDMS templates show larger roughness, on the order of 10â €‰s of nm. These roughness values do not change significantly with the thickness of the silver film. The SERS intensities of 4-Aminothiophenol (ATP) deposited on these substrates strongly depend on both roughness and thickness, with more significant contribution from the roughness on thinner films. FEM simulations of the electric field intensities on surfaces of different thicknesses for rough and flat surfaces suggest higher localized plamons on thinner, rough surfaces. This study indicates that, besides roughness, the thickness of the metallic layer plays a significant role in the SERS activity.
AB - In this paper we evaluate the effect of roughness and thickness of silver film substrates, fabricated on glass and polydimethylsiloxane (PDMS) templates, on surface-enhanced Raman Spectroscopy (SERS) activity. While the silver substrates obtained on glass templates exhibit nm-scale roughness, the silver substrates on PDMS templates show larger roughness, on the order of 10â €‰s of nm. These roughness values do not change significantly with the thickness of the silver film. The SERS intensities of 4-Aminothiophenol (ATP) deposited on these substrates strongly depend on both roughness and thickness, with more significant contribution from the roughness on thinner films. FEM simulations of the electric field intensities on surfaces of different thicknesses for rough and flat surfaces suggest higher localized plamons on thinner, rough surfaces. This study indicates that, besides roughness, the thickness of the metallic layer plays a significant role in the SERS activity.
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U2 - 10.1038/srep11644
DO - 10.1038/srep11644
M3 - Article
AN - SCOPUS:84934284603
VL - 5
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
M1 - 11644
ER -