Fabrication of tunable plasmonic 3D nanostructures for SERS applications
| Autor: | Handan Yüksel, Mehmet Kahraman, Ayse Ozbay, Ramazan Solmaz |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Nanostructure Polydimethylsiloxane Surface plasmon technology industry and agriculture Physics::Optics Nanotechnology 02 engineering and technology Surface-enhanced Raman spectroscopy 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Soft lithography 0104 chemical sciences Nanomaterials chemistry.chemical_compound chemistry Nanosphere lithography Physics::Chemical Physics 0210 nano-technology Plasmon |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.2214058 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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