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Journal of Nanomaterials
Volume 2013 (2013), Article ID 530701, 6 pages
http://dx.doi.org/10.1155/2013/530701
Research Article

A Covalently Imprinted Photonic Crystal for Glucose Sensing

School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China

Received 27 April 2013; Revised 9 June 2013; Accepted 9 June 2013

Academic Editor: Amir Kajbafvala

Copyright © 2013 Fei Xue et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We demonstrate a glucose-sensing material based on the combination of photonic crystal templating and a molecular-imprinting technique. In the presence of the target molecule glucose, poly(N-isopropylacrylamide-co-2-hydroxyethyl methacrylate) hydrogel with pendent phenylboronic acid groups was synthesized in the void of a poly(methyl methacrylate) (PMMA) colloidal crystal. After removing the PMMA photonic crystal template and glucose molecules, a 3D-ordered porous covalently imprinted photonic crystal (CIPC) hydrogel was created. The unique 3D-ordered porous hydrogel revealed optical changes in response to glucose concentration. At pH = 11 and , the diffraction of CIPC redshifted from 725 nm to 880 nm in response to 20 mmol L−1 glucose. Due to the covalently imprinted recognizer, boronic acid group, the selectivity of the CIPC towards glucose over D-ribose and L-rhamnose was improved significantly.