Fabrication and characterization of flexible and tunable plasmonic nanostructures

Mehmet Kahraman, Pallavi Daggumati, Ozge Kurtulus, Erkin Seker, Sebastian Wachsmann-Hogiu

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Abstract

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.

Original languageEnglish (US)
Article number3396
JournalScientific Reports
Volume3
DOIs
StatePublished - Dec 2 2013

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Nanostructures
Raman Spectrum Analysis
Microspheres
Nanospheres
Glass
Microscopy
Spectrum Analysis
Lasers
Fungi

ASJC Scopus subject areas

  • General

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Fabrication and characterization of flexible and tunable plasmonic nanostructures. / Kahraman, Mehmet; Daggumati, Pallavi; Kurtulus, Ozge; Seker, Erkin; Wachsmann-Hogiu, Sebastian.

In: Scientific Reports, Vol. 3, 3396, 02.12.2013.

Research output: Contribution to journalArticle

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