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

fYear

2011

fDate

21-24 June 2011

Firstpage

1

Lastpage

2

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanoelectronics Conference (INEC), 2011 IEEE 4th International

Conference_Location

Tao-Yuan

ISSN

2159-3523

Print_ISBN

978-1-4577-0379-9

Electronic_ISBN

2159-3523

Type

conf

DOI

10.1109/INEC.2011.5991779

Filename

5991779