Probing molecular interactions on carbon nanotube surfaces using surface plasmon resonance sensors

Date

2012

Authors

Kakenov, N.
Balci, O.
Balci, S.
Kocabas, C.

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Source Title

Applied Physics Letters

Print ISSN

0003-6951

Electronic ISSN

1077-3118

Publisher

A I P Publishing LLC

Volume

101

Issue

22

Pages

Language

English

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Abstract

In this work, we present a method to probe molecular interactions on single-walled carbon nanotube (SWNT) surfaces using a surface plasmon sensor. SWNT networks were synthesized by chemical vapor deposition and transfer-printed on gold surfaces. We studied the excitation of surface plasmon-polaritons on nanotube coated gold surfaces with sub-monolayer, monolayer, and multilayer surface coverage. Integrating the fabricated sensor with a microfluidic device, we were able to obtain binding dynamics of a bovine serum albumin (BSA) protein on SWNT networks with various tube densities. The results reveal the kinetic parameters for nonspecific binding of BSA on SWNT coated surfaces having various tube densities. © 2012 American Institute of Physics.

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