Multilayer enhanced SERS active materials: fabrication, characterization, and application to trace chemical detection

Honggang Li; Caitlin E. Baum; Jian Sun; Brian M. Cullum

doi:10.1117/12.668935

19 May 2006 Multilayer enhanced SERS active materials: fabrication, characterization, and application to trace chemical detection

Honggang Li, Caitlin E. Baum, Jian Sun, Brian M. Cullum

Author Affiliations +

Proceedings Volume 6218, Chemical and Biological Sensing VII; 621804 (2006) https://doi.org/10.1117/12.668935
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

Abstract

A multilayer surface-enhanced Raman scattering (SERS) substrate geometry providing significantly greater SERS enhancements, longer active lifetimes, better reproducibility, and lower detection limits for trace chemical analysis than traditional SERS substrates has been developed. We have fabricated and characterized this novel class of multilayered metal film-based SERS substrates, which are capable of enhancing SERS signals over an order of magnitude relative to conventional metal film over nanostructure substrates. These multilayer enhanced metal film substrates are fabricated by repeated vapor deposition of metal films over nanometer sized structures. Different sizes of nanostructures were evaluated in order to obtain the optimal SERS enhancements. Meanwhile, different dielectric coatings were fabricated between silver layers, and SERS enhancements were evaluated for each type. Additionally, different metals, such as gold, were used to further optimize the stability and reproducibility of these novel substrates. Silver oxide layers produced at elevated temperatures were also investigated to accelerate the fabrication rate of these multilayer substrates. Finally, this paper also discusses the application of these novel multilayer substrates for trace detection of chemical agents and simulants.

Citation Download Citation

Honggang Li, Caitlin E. Baum, Jian Sun, and Brian M. Cullum "Multilayer enhanced SERS active materials: fabrication, characterization, and application to trace chemical detection", Proc. SPIE 6218, Chemical and Biological Sensing VII, 621804 (19 May 2006); https://doi.org/10.1117/12.668935

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available