Fabrication and Characterization of Flexible and Tunable Plasmonic Nanostructures

We present a novel method to fabricate flexible and tunable plasmonic nanostructures based on combination of soft lithography and nanosphere lithography and perform a comprehensive structural and optical characterization of these structures. Spherical latex particles are uniformly deposited on glass...

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Bibliographic Details
Published in:Scientific reports 2013-12, Vol.3 (1), p.3396, Article 3396
Main Authors: Kahraman, Mehmet, Daggumati, Pallavi, Kurtulus, Ozge, Seker, Erkin, Wachsmann-Hogiu, Sebastian
Format: Article
Language:English
Subjects:
140/133
639/301/1019/1021
639/638/11/511
Absorption spectroscopy
Atomic force microscopy
Fabrication
Humanities and Social Sciences
Latex
Lithography
multidisciplinary
Optical properties
Polydimethylsiloxane
Raman spectroscopy
Science
Spectroscopy
Spectrum analysis
Wavelength
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Summary:We present a novel method to fabricate flexible and tunable plasmonic nanostructures based on combination of soft lithography and nanosphere lithography and perform a comprehensive structural and optical characterization of these structures. Spherical latex particles are uniformly deposited on glass slides and used as molds for polydimethylsiloxane to obtain nanovoid structures. The diameter and depth of the nanostructures are controlled by the size of the latex particles. These surfaces are coated with a thin Ag layer for fabrication of uniform plasmonic nanostructures. Structural characterization of these surfaces is performed by SEM and AFM. Optical properties of these plasmonic nanostructures are evaluated via UV/Vis absorption spectroscopy, dark field microscopy and surface–enhanced Raman spectroscopy (SERS). Position of the surface plasmon absorption depends on the diameter and depth of the nanostructures. SERS enhancement factor (measured up to 1.4 × 10 6 ) is dependent on the plasmon absorption wavelength and laser wavelength used in these experiments.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep03396