title: Photonic crystal borax competitive binding carbohydrate sensing motif.
abstract: We developed a photonic crystal sensing method for diol containing species such as carbohydrates based on a poly(vinyl alcohol) (PVA) hydrogel containing an embedded crystalline colloidal array (CCA). The polymerized CCA (PCCA) diffracts visible light. We show that in the presence of borax the diffraction wavelength shifts as the concentration of glucose changes. The diffraction shifts result from the competitive binding of glucose to borate, which reduces the concentration of borate bound to the PVA diols.
authors.affiliation: Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
authors.forename: Qingzhou
authors.initials: Q
authors.lastname: Cui
authors.forename: Michelle M
authors.initials: MM
authors.lastname: Ward Muscatello
authors.forename: Sanford A
authors.initials: SA
authors.lastname: Asher
mesh_terms: D001881:Borates / Q000737:chemistry*; D002241:Carbohydrates / Q000737:chemistry*; D055664:Electrochemical Techniques; D055095:Optics and Photonics / Q000295:instrumentation* / Q000379:methods*; D011142:Polyvinyl Alcohol
chemical_list: D001881:Borates; D002241:Carbohydrates; C018851:borax; D011142:Polyvinyl Alcohol