Share Email Print
cover

Proceedings Paper

Controllable preparation and optical properties of Ag columnar thin films
Author(s): Xu Huang; Yan-juan Liao; Hong Wang; Jing-nan Huang; Shao-ji Jiang
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Noble metal nano-structured thin films show great electromagnetic enhancement due to the surface plasmon resonance effect. It can be used for surface enhanced Raman scattering (SERS), which means markers of ultra low concentration can be detected, having great potential in biosensing applications. In this work, we introduce glancing angle deposition (GLAD), which is based on the traditional physical vapor deposition, to prepare vertical columnar thin films (CTFs). Anodic aluminum oxide (AAO) is used as template during vacuum deposition, and nanodots of ordered distribution are obtained. Subsequently, these nanodots are used as the pre-constructs in GLAD, and the fabricated columns have a much bigger separation. Rhodamine 6G (R6G) SERS spectra of the nanostructure thin films are measured to study their optical properties. Due to the separation of columns, CTFs on nanodots show stronger intensity than CTFs on blank substrates. What’s more, the uniformity is also improved by the separation, making the substrates more applicable for biosensing. CTFs on nanodots of different heights are prepared. SERS measurements show that as the height increases, SERS effect increases due to much more hot spots of electromagnetic enhancement and coupling. Our method proves to be a feasible, low-cost, large-area preparation method for ultra high sensitivity SERS substrate.

Paper Details

Date Published: 25 October 2016
PDF: 6 pages
Proc. SPIE 9686, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices, 96861M (25 October 2016); doi: 10.1117/12.2241149
Show Author Affiliations
Xu Huang, Sun Yat-Sen Univ. (China)
Yan-juan Liao, Sun Yat-Sen Univ. (China)
Hong Wang, Sun Yat-Sen Univ. (China)
Jing-nan Huang, Sun Yat-Sen Univ. (China)
Shao-ji Jiang, Sun Yat-Sen Univ. (China)


Published in SPIE Proceedings Vol. 9686:
8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices
Yadong Jiang; Bernard Kippelen; Junsheng Yu, Editor(s)

© SPIE. Terms of Use
Back to Top