"Plasmon-Polaritons on Graphene-Metal Surface
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MAT-ME Joint Fall 2011 Seminar Series
Plasmon-Polaritons on Graphene-Metal Surface
Coskun Kocabas
Bilkent University, Department of Physics

ABSTRACT:
In this presentation, I will talk about a new application of graphene in the field of plasmonics.
We studied excitation of surface-plasmon polaritons on graphene-metal surface. The metal
surface is functionalized by transfer printing of a graphene layer grown by chemical vapor
deposition on copper foils. Surface plasmon resonance (SPR) characteristics of monolayer
and multilayer graphene on the metal surface are presented. The results reveal the essential
features of graphene layer predicted by the calculations based on transfer matrix method. As
an application, we fabricated a surface plasmon resonance sensor integrated with a
microfluidic device to study nonspecific physical interaction between graphene layer and
proteins. We obtained association and dissociation coefficient of a serum albumin protein
(BSA, Bovine Serum Albumin) adsorbed on graphene layer. We believe that graphene
functionalized SPR sensors could provide a new platform to study interactions between
graphene and molecules.


Wednesday, 16 November 2011, 13.40