Title :
Local field enhancement dependence on nanoparticle´s geometry in Au/TiO2/Ti/Si SERS-active substrate for biochemical sensors
Author :
Cheng, Hui-Wen ; Li, Yiming
Author_Institution :
Inst. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
In this work, we study the effect of surface roughness and shape of Au nanoparticles on the local field enhancement of SERS-active substrates. Our 3D FDTD simulation predicts that the substrate with roughened surface exhibits large field enhancement, especially for cubic shape of nanoparticle. The field enhancement of spherical and cubic nanoparticles is enlarged by Au/Ag alloy and Au nanocage structure which is useful for biochemical sensing applications.
Keywords :
biosensors; chemical sensors; finite difference time-domain analysis; gold; nanoparticles; silicon; surface enhanced Raman scattering; surface roughness; titanium compounds; 3D FDTD simulation; Au-TiO2-Ti-Si; SERS-active substrate; biochemical sensing applications; biochemical sensors; cubic nanoparticles; cubic shape; local field enhancement dependence; nanocage structure; nanoparticle geometry; roughened surface; spherical nanoparticles; surface roughness; Electric fields; Gold; Nanoparticles; Shape; Substrates; Surface roughness; 3D finite-difference time-domain simulation; Au nanoparticle; Maxwell´s equation; field enhancement; hydrothermal treatment;
Conference_Titel :
Nanoelectronics Conference (INEC), 2011 IEEE 4th International
Conference_Location :
Tao-Yuan
Print_ISBN :
978-1-4577-0379-9
Electronic_ISBN :
2159-3523
DOI :
10.1109/INEC.2011.5991779
