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Surface Plasmon Enhanced Transmission with Self-assembled Hexagonal Nanohole Arrays

Published online by Cambridge University Press:  01 February 2011

Yi Lou ,
Nathan Westcott ,
John McGlade ,
John F. Muth  and
Muhammad Yousaf
Yi Lou
Affiliation:
ylou@ncsu.edu, NC State University, Electrical and Computer Engineering, Raleigh, North Carolina, United States
Nathan Westcott
Affiliation:
nwestcot@email.unc.edu, University of North Carolina, Chemistry, Chapel Hill, North Carolina, United States
John McGlade
Affiliation:
jemcglad@ncsu.edu, NC State University, Electrical and Computer Engineering, Raleigh, North Carolina, United States
John F. Muth
Affiliation:
muth@ncsu.edu, NC State University, Electrical and Computer Engineering, Raleigh, North Carolina, United States
Muhammad Yousaf
Affiliation:
mnyousaf@email.unc.edu, University of North Carolina, Chemistry, Chapel Hill, North Carolina, United States
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Abstract

The optical properties of hexagonal nanohole arrays in gold films are investigated. Nanosphere lithography combined with reactive ion etching has been applied as a low cost method to fabricate nanohole arrays with hexagonal symmetry where the size and spacing of the holes can be independently controlled. In this study, the spacing between the nanoholes is 600 nm with the hole diameter varied between 450 and 250 nm. The transmission spectra of the surface patterns with different film thickness are collected with normally incident light. The color of the reflected light from the nanohole array was found to change from green to red as the diameter of the holes was reduced. One application of these films is to study cell adhesion to small areas with controlled size. We explore the possibility of making isolated cell adhesion dots by chemically modifying the nanohole area. Swiss 3T3 cells were adhered onto the patterned surface and imaged using environmental SEM and fluorescent microscopy.

Keywords

Auself-assemblycolloid
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1133: Symposium AA – Materials for Optical Sensors in Biomedical Applications , 2008 , 1133-AA04-05
Copyright
Copyright © Materials Research Society 2009

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References

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