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Proceedings Paper

Fabrication of tunable plasmonic 3D nanostructures for SERS applications
Author(s): Ayse Ozbay; Handan Yuksel; Ramazan Solmaz; Mehmet Kahraman
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Paper Abstract

Surface-enhanced Raman scattering (SERS) is a powerful technique used for characterization of biological and nonbiological molecules and structures. Since plasmonic properties of the nanomaterials is one of the most important factor influencing SERS activity, tunable plasmonic properties (wavelength of the surface plasmons and magnitude of the electromagnetic field generated on the surface) of SERS substrates are crucial in SERS studies. SERS enhancement can be maximized by controlling of plasmonic properties of the nanomaterials. In this study, a novel approach to fabricate tunable plasmonic 3D nanostructures based on combination of soft lithography and nanosphere lithography is studied. Spherical latex particles having different diameters are uniformly deposited on glass slides with convective assembly method. The experimental parameters for the convective assembly are optimized by changing of latex spheres concentration, stage velocity and latex particles volume placed between to two glass slides that staying with a certain angle to each other. Afterwards, polydimethylsiloxane (PDMS) elastomer is poured on the deposited latex particles and cured to obtain nanovoids on the PDMS surfaces. The diameter and depth of the nanovoids on the PDMS surface are controlled by the size of the latex particles. Finally, fabricated nanovoid template on the PDMS surfaces are filled with the silver coating to obtain plasmonic 3D nanostructures. Characterization of the fabricated surfaces is performed by scanning electron microscopy (SEM) and atomic force microscopy (AFM). SERS performance of fabricated 3D plasmonic nanostructures will be evaluated using Raman reporter molecules.

Paper Details

Date Published: 22 April 2016
PDF: 6 pages
Proc. SPIE 9724, Plasmonics in Biology and Medicine XIII, 972410 (22 April 2016); doi: 10.1117/12.2214058
Show Author Affiliations
Ayse Ozbay, Gaziantep Üniv. (Turkey)
Handan Yuksel, Bingol Univ. (Turkey)
Ramazan Solmaz, Bingol Univ. (Turkey)
Mehmet Kahraman, Gaziantep Üniv. (Turkey)


Published in SPIE Proceedings Vol. 9724:
Plasmonics in Biology and Medicine XIII
Tuan Vo-Dinh; Joseph R. Lakowicz, Editor(s)

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