期刊
BIOSENSORS & BIOELECTRONICS
卷 71, 期 -, 页码 18-24出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2015.04.019
关键词
Biofuel cell; Microfluidic paper-based analytical devices; Glucose dehydrogenase; Nanoporous PtNi; Bilirubin oxidase
类别
资金
- National Natural Science Foundation of China, China [21475052, 21277058, 21175058]
- Natural Science Foundation of Shandong Province, China [ZR2012BZ002]
A mediator-less and compartment-less glucose/O-2 enzymatic biofuel cell (BFC) was introduced into microfluidic paper-based analytical devices (mu-PADs) that relies on flow in hollow channels with silver nanoparticles/graphene modified paper electrode as the anodic and cathodic substrate, to implement self-powered sensitive carcinoembryonic antigen (CEA) detection. Glucose dehydrogenase (GDH)-gold nanoparticles bioconjugate modified with CEA acted as a biocatalyst for enhancing glucose oxidation in the bioanode, as well as the transducing enzyme for signaling magnification. Similarly, nanoporous PtNi/bilirubin oxidase (BUD) acted as a biocatalyst for enhancing O-2 reduction in the biocathode. With an increase in the concentration of CEA, the amount of CEA-Au-GDH bioconjugate on bioanode decreases, thus leading to the lower output of the as-prepared SEC. This proposed BFC-based self-powered immunosensor for CEA possessed largely increased linear detection range from 1 pg mL(-1) to 0.5 mu g with a detection limit of 0.7 pg mL(-1). The proposed BFC-based self-powered immunosensor shows high sensitivity, stability, and reproducibility and can become a promising platform for other protein detection. (C) 2015 Elsevier B.V. All rights reserved.
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