title: 2-D array photonic crystal sensing motif.
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 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.
authors: Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
authors: Jian-Tao
authors: JT
authors: Zhang
authors: Luling
authors: L
authors: Wang
authors: Jia
authors: J
authors: Luo
authors: Alexander
authors: A
authors: Tikhonov
authors: Nikolay
authors: N
authors: Kornienko
authors: Sanford A
authors: SA
authors: Asher