%A JT Zhang
%A L Wang
%A J Luo
%A A Tikhonov
%A N Kornienko
%A SA Asher
%J Journal of the American Chemical Society
%T 2-D array photonic crystal sensing motif
%X 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 mercury 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 efficiencies that enable them to be used for visual determination of analyte concentrations. ? 2011 American Chemical Society.
%N 24
%P 9152 - 9155
%V 133
%D 2011
%R 10.1021/ja201015c
%L pittir17285