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Graphened IR Screens: A New Spectroscopic Platform For Bio-Species

Published online by Cambridge University Press:  02 September 2019

Amrita Banerjee
Affiliation:
Electronic Imaging Center, New Jersey Institute of Technology, Newark, NJ 07102, U.S.A.
Dieter Moeller
Affiliation:
Electronic Imaging Center, New Jersey Institute of Technology, Newark, NJ 07102, U.S.A.
Haim Grebel
Affiliation:
Electronic Imaging Center, New Jersey Institute of Technology, Newark, NJ 07102, U.S.A.
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Abstract

Metallo-dielectric screens are periodic structures, which are at resonance with the infrared (IR) wavelength of interest: a standing wave of surface charges is formed at resonance conditions, which enables transmission or, reflection of certain IR bands. Graphene is a monolayer thick crystal of carbon. It is chemically inert and exhibits very large electronic mobility. Recently, we succeeded in fabricating mono and a few-layered suspended graphene on top of these screens. We combined these two unique components in fabricating novel platforms, which enhance IR signals of soft bio-species. Specifically, we used these platforms to examine IR spectra of a model protein, cytochrome c from a bovine heart tissue. Clear Raman signal variation as a function of platform orientation has been demonstrated. Accentuation of the IR absorption spectra was shown as well.

Type
Research Article
Copyright
Copyright © Materials Research Society 2009

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