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Two-dimensional photonic crystal surfactant detection

Zhang, JT and Smith, N and Asher, SA (2012) Two-dimensional photonic crystal surfactant detection. Analytical Chemistry, 84 (15). 6416 - 6420. ISSN 0003-2700

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We developed a novel two-dimensional (2-D) crystalline colloidal array photonic crystal sensing material for the visual detection of amphiphilic molecules in water. A close-packed polystyrene 2-D array monolayer was embedded in a poly(N-isopropylacrylamide) (PNIPAAm)-based hydrogel film. These 2-D photonic crystals placed on a mirror show intense diffraction that enables them to be used for visual determination of analytes. Binding of surfactant molecules attaches ions to the sensor that swells the PNIPAAm-based hydrogel. The resulting increase in particle spacing red shifts the 2-D diffracted light. Incorporation of more hydrophobic monomers increases the sensitivity to surfactants. © 2012 American Chemical Society.


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Item Type: Article
Status: Published
CreatorsEmailPitt UsernameORCID
Zhang, JT
Smith, N
Asher, SAasher@pitt.eduASHER
Date: 7 August 2012
Date Type: Publication
Journal or Publication Title: Analytical Chemistry
Volume: 84
Number: 15
Page Range: 6416 - 6420
DOI or Unique Handle: 10.1021/ac300174m
Schools and Programs: Dietrich School of Arts and Sciences > Chemistry
Refereed: Yes
ISSN: 0003-2700
PubMed ID: 22720790
Date Deposited: 14 Feb 2013 21:16
Last Modified: 02 Feb 2019 16:58


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