期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 150, 期 1, 页码 183-190出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2010.07.018
关键词
Fast response; Photonic crystal; pH sensor; Hydrogel; Inverse opal
资金
- Korean Government (MOEHRD) [KRF-2008-331-D00153]
- US DOE 'Light-Material Interactions in Energy Conversion' Energy Frontier Research Center [DE-SC0001293]
- National Research Foundation of Korea [2008-331-D00153] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Polymer hydrogels can exhibit large reversible volume changes in response to external stimuli, and thus are regarded as excellent materials for chemical sensors. In this report, we demonstrate a mechanically robust and fast response photonic crystal pH sensor fabricated by templated photo-polymerization of hydrogel monomers within the interstitial space of a self-assembled colloidal photonic crystal Through-out a rigorous optimization of the photo-polymerization. pH sensors showing a response time of less than 105 upon a pH change were fabricated. Repeated pH changes revealed that the sensor has a long lifetime (>6 months) without degradation of the response time or reproducibility in pH-driven color change. (C) 2010 Elsevier B V All rights reserved.
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