Share Email Print
cover

Proceedings Paper

Gold sputtered Blu-Ray disks as novel and cost effective sensors for surface enhanced Raman spectroscopy
Author(s): Michél K. Nieuwoudt; Jacob W. Martin; Reece N. Oosterbeek; Nina I. Novikova; Xindi Wang; Jenny Malmström; David E. Williams; M. Cather Simpson
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Surface Enhanced Raman spectroscopy (SERS) offers sensitive and non-invasive detection of a variety of compounds as well as unparalleled information for establishing the molecular identity of both inorganic and organic compounds, not only in biological fluids but in all other aqueous and non-aqueous media. The localized hotspots produced through SERS at the solution/nanostructure interface of clustered gold or silver nano-particles enables detection levels of parts per trillion. Recent developments in advanced fabrication methods have enabled the manufacture of SERS substrates with repeatable surface nanostructures which provide reproducible quantitative analysis, historically a weakness of the SERS technique. In this paper we describe the novel use of gold sputtered Blu-Ray surfaces as SERS substrates. Blu-Ray disks provide ideal surfaces of SERS substrates with their repeatable and regular nano-gratings. We show that the unique surface features and composition of the recording surface enables the formation of gold nano-islands with nanogaps, simply through gold sputtering, and relate this to a 600 fold signal increase of the melamine Raman signal in aqueous solutions and detection to 68 ppb. Melamine is a triazine compound and appears not only as environmental contaminant in environmental groundwater but also as an adulterant in foods due to its high nitrogen content. We have shown significant SERS signal enhancements for spectra of melamine using gold-sputtered Blu-Ray disk surfaces, with reproducibility of 12%. Blu-Ray disks have a unique combination of design, surface features and composition of the recording surface which makes them ideal for preparation of SERS substrates by gold sputter-coating.

Paper Details

Date Published: 9 March 2015
PDF: 8 pages
Proc. SPIE 9332, Optical Diagnostics and Sensing XV: Toward Point-of-Care Diagnostics, 933207 (9 March 2015); doi: 10.1117/12.2078638
Show Author Affiliations
Michél K. Nieuwoudt, The Univ. of Auckland (New Zealand)
Jacob W. Martin, The Univ. of Auckland (New Zealand)
Reece N. Oosterbeek, The Univ. of Auckland (New Zealand)
Nina I. Novikova, The Univ. of Auckland (New Zealand)
Xindi Wang, The Univ. of Auckland (New Zealand)
Jenny Malmström, The Univ. of Auckland (New Zealand)
David E. Williams, The Univ. of Auckland (New Zealand)
M. Cather Simpson, The Univ. of Auckland (New Zealand)


Published in SPIE Proceedings Vol. 9332:
Optical Diagnostics and Sensing XV: Toward Point-of-Care Diagnostics
Gerard L. Coté, Editor(s)

© SPIE. Terms of Use
Back to Top