TY - JOUR
T1 - Detailed study of surface-enhanced Raman scattering from metallic nanosculptured thin films and their potential for biosensing
AU - Shalabney, Atef
AU - Khare, Chinmay
AU - Bauer, Jens
AU - Rauschenbach, Bernd
AU - Abdulhalim, I.
N1 - Funding Information: This research is supported by the Singapore National Research Foundation under CREATE programme: Nanomaterials for Energy and Water Management and by the Graduate school ‘Build-MoNa (University Leipzig, Germany) funded within the German Excellence Initiative of the Deutsche Forschungsgemeinschaft (DFG). We would like to thank Prof. Akhlesh Lakhtakia and Dr. Christian Patzig for their support in the initial stages of this project. C.K. and J.B. fabricated the STF samples and performed the SEM images under the guidance of B.R. A.S. performed the design of the samples, the SERS measurements and analysis under the supervision of I.A. I.A. was responsible for the overall research and manuscript preparation.
PY - 2012/1/1
Y1 - 2012/1/1
N2 - Surface-enhanced Raman scattering (SERS) from silver nanosculptured thin films (STF) was studied in detail for biosensing. The influences of the nanostructures' sizes, topology, the substrate features, and the preparation conditions on the enhancement were examined. Enhancement factors on the order of 107 were obtained from silver nanorods deposited on bare silicon substrates with respect to their dense counterparts, using 4-aminotheophenol (4-ATP) for the Raman emission. The low detection limit that can be achieved with STFs is below 1 μg/lit of the probe molecule 4-ATP in Ethanol solution. Theoretical modeling based on a single small spheroidal nanoparticle helped in explaining the main properties of SERS from STFs. Stability of the films was noticed over a period of one year without significant degradation.
AB - Surface-enhanced Raman scattering (SERS) from silver nanosculptured thin films (STF) was studied in detail for biosensing. The influences of the nanostructures' sizes, topology, the substrate features, and the preparation conditions on the enhancement were examined. Enhancement factors on the order of 107 were obtained from silver nanorods deposited on bare silicon substrates with respect to their dense counterparts, using 4-aminotheophenol (4-ATP) for the Raman emission. The low detection limit that can be achieved with STFs is below 1 μg/lit of the probe molecule 4-ATP in Ethanol solution. Theoretical modeling based on a single small spheroidal nanoparticle helped in explaining the main properties of SERS from STFs. Stability of the films was noticed over a period of one year without significant degradation.
KW - Raman enhancement factor
KW - glancing angle deposition
KW - sculptured thin films
KW - surface-enhanced Raman scattering
UR - http://www.scopus.com/inward/record.url?scp=84869232009&partnerID=8YFLogxK
U2 - 10.1117/1.JNP.6.061605
DO - 10.1117/1.JNP.6.061605
M3 - Article
SN - 1934-2608
VL - 6
JO - Journal of Nanophotonics
JF - Journal of Nanophotonics
IS - 1
M1 - 061605
ER -