Journal
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
Volume 27, Issue 3, Pages 297-302Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.pnsc.2017.04.005
Keywords
In-situ secondary growth; Prussian blue film; Regular nanostructure; Electrochemistry; Biosensors
Funding
- Innovative Research Team Program of the Ministry of Education of China [IRT13070]
- Jiangsu Province Natural Science Foundation for the Youth [BK20140931]
- Top-notch Academic Programs Project of Jiangsu Higher Education Institutions (TAPP)
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A regular nanostructure has been widely confirmed to result ina marked improvement in material performance in biosensing applications. In the present study, a regular nanostructured Prussian blue (PB) film with two heterogeneous crystal layers was synthesized in-situ using a secondary growth method. A PB seed layer was first controlled to form uniform cube-like crystal nuclei through an ultrasonic reaction with a single reactant. Then, well-defined 100 nm PB nanocubes were further crystallized on this seed layer using a self-assembly approach. In order to accelerate the electron transfer rate during the enzyme reaction for glucose detection, the graphene was used as the main cross-linker to immobilize glucose oxidase on the PB film. The as-prepared biosensor exhibited high electrocatalysis and electron conductivity for the detection of trace glucose with a sensitivity of 141.5 mu AmM-1 cm(-2), as well as excellent anti-interference ability in the presence of ascorbic acid and uric acid under a low operation potential of -0.05 V.
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