TY - GEN
T1 - Simulation of Raman enhancement in SERS-Active substrates with Au layer considering different geometry of nanoparticles
AU - Cheng, Hui Wen
AU - Li, Yiming
PY - 2010
Y1 - 2010
N2 - In this work, we study surface enhanced Raman spectroscopy (SERS) active substrates for the detection of Rhodamine 6G. To examine the electromagnetic enhancement, with different shape of nanoparticle, we apply the finite-difference timedomain (FDTD) algorithm to analyze the structures by solving a set of coupled Maxwell's equations in differential form. The field enhancements are investigated in the visible regime with the wavelength of 633 nm. In the experimental measurement, the surface enhanced Raman scattering signals from the surface of substrates with 12-hour hydrothermal treatment and without treatment are performed and compared. Through the three-dimensional (3D) FDTD calculation, the enhancements with different shape of nanoparticle are tested and obtained which are nanoparticle, gold nanocage and gold/silver alloy for spherical, cubic and pyramidical shapes. The results show that the enhancement of spherical and cubic shapes can be much improved by nanocage and gold/siliver alloy structures.
AB - In this work, we study surface enhanced Raman spectroscopy (SERS) active substrates for the detection of Rhodamine 6G. To examine the electromagnetic enhancement, with different shape of nanoparticle, we apply the finite-difference timedomain (FDTD) algorithm to analyze the structures by solving a set of coupled Maxwell's equations in differential form. The field enhancements are investigated in the visible regime with the wavelength of 633 nm. In the experimental measurement, the surface enhanced Raman scattering signals from the surface of substrates with 12-hour hydrothermal treatment and without treatment are performed and compared. Through the three-dimensional (3D) FDTD calculation, the enhancements with different shape of nanoparticle are tested and obtained which are nanoparticle, gold nanocage and gold/silver alloy for spherical, cubic and pyramidical shapes. The results show that the enhancement of spherical and cubic shapes can be much improved by nanocage and gold/siliver alloy structures.
KW - Electromagnetic enhancement
KW - Finite-difference time-domain
KW - Gold nanocage
KW - Gold/silver alloy
KW - Hydrothermally treated substrate
KW - Nanoparticle
KW - Surface-enhanced raman spectroscopy (SERS)
UR - http://www.scopus.com/inward/record.url?scp=78751694508&partnerID=8YFLogxK
U2 - 10.1109/IWCE.2010.5677966
DO - 10.1109/IWCE.2010.5677966
M3 - Conference contribution
AN - SCOPUS:78751694508
SN - 9781424493845
T3 - 2010 14th International Workshop on Computational Electronics, IWCE 2010
SP - 263
EP - 266
BT - 2010 14th International Workshop on Computational Electronics, IWCE 2010
T2 - 2010 14th International Workshop on Computational Electronics, IWCE 2010
Y2 - 26 October 2010 through 29 October 2010
ER -