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Published: May 23, 2011 r 2011 American Chemical Society 9152 dx.doi.org/10.1021/ja201015c |J. Am. Chem. Soc. 2011, 133, 91529155
 

Summary: Published: May 23, 2011
r 2011 American Chemical Society 9152 dx.doi.org/10.1021/ja201015c |J. Am. Chem. Soc. 2011, 133, 91529155
COMMUNICATION
pubs.acs.org/JACS
2-D Array Photonic Crystal Sensing Motif
Jian-Tao Zhang, Luling Wang, Jia Luo, Alexander Tikhonov, Nikolay Kornienko, and Sanford A. Asher*
Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
bS Supporting Information
ABSTRACT: We have developed the first high-diffraction-
efficiency two-dimensional (2-D) photonic crystals for
molecular recognition and chemical sensing applications.
We prepared close-packed 2-D polystyrene particle arrays
by self-assembly of spreading particle monolayers on mer-
cury surfaces. The 2-D particle arrays amazingly diffract 80%
of the incident light. When a 2-D array was transferred onto
a hydrogel thin film showing a hydrogel volume change in
response to a specific analyte, the array spacing was altered,
shifting the 2-D array diffraction wavelength. These 2-D
array photonic crystals exhibit ultrahigh diffraction efficien-
cies that enable them to be used for visual determination of

  

Source: Asher, Sanford A. - Department of Chemistry, University of Pittsburgh

 

Collections: Materials Science; Chemistry