TY - GEN
T1 - Effects of shape and size on field enhancement of Au nanoparticles on SERS-active substrates
AU - Cheng, Hui Wen
AU - Li, Yiming
AU - Yang, Jung Yen
PY - 2010
Y1 - 2010
N2 - In this work, we study surface enhanced Raman spectroscopy (SERS) active substrates with low background for the detection of Rhodamine 6G. In our experimental evaluations, the surface enhanced Raman scattering signals from the surface substrates with a duration of 12-hour treatment and without treatment are obtained. Through three-dimensional (3D) finite-difference time-domain (FDTD) numerical simulation, we find that the structures with vertical variations of surface have larger field enhancement than that of horizontal variations which implies a strong positive effect on the local field enhancement. Moreover, the field enhancements are sensitive to the diameter and the shape of Au nanoparticles. We further find the 35-nm cubic shape of Au nanoparticle shows relatively larger electric field enhancement than that of spherical one.
AB - In this work, we study surface enhanced Raman spectroscopy (SERS) active substrates with low background for the detection of Rhodamine 6G. In our experimental evaluations, the surface enhanced Raman scattering signals from the surface substrates with a duration of 12-hour treatment and without treatment are obtained. Through three-dimensional (3D) finite-difference time-domain (FDTD) numerical simulation, we find that the structures with vertical variations of surface have larger field enhancement than that of horizontal variations which implies a strong positive effect on the local field enhancement. Moreover, the field enhancements are sensitive to the diameter and the shape of Au nanoparticles. We further find the 35-nm cubic shape of Au nanoparticle shows relatively larger electric field enhancement than that of spherical one.
UR - http://www.scopus.com/inward/record.url?scp=79951837900&partnerID=8YFLogxK
U2 - 10.1109/NANO.2010.5697814
DO - 10.1109/NANO.2010.5697814
M3 - Conference contribution
AN - SCOPUS:79951837900
SN - 9781424470334
T3 - 2010 10th IEEE Conference on Nanotechnology, NANO 2010
SP - 732
EP - 735
BT - 2010 10th IEEE Conference on Nanotechnology, NANO 2010
T2 - 2010 10th IEEE Conference on Nanotechnology, NANO 2010
Y2 - 17 August 2010 through 20 August 2010
ER -