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Nanometal-Decorated Exfoliated Graphite Nanoplatelet Based Glucose Biosensors with High Sensitivity and Fast Response
Abstract
We report the novel fabrication of a highly sensitive, selective, fast responding, and affordable amperometric glucose biosensor using exfoliated graphite nanoplatelets (xGnPs) decorated with Pt and Pd nanoparticles. Nafion was used to solubilize metal-decorated graphite nanoplatelets, and a simple cast method with high content organic solvent (85 wt %) was used to prepare the biosensors. The addition of precious metal nanoparticles such as platinum (Pt) and palladium (Pd) to xGnP increased the electroactive area of the electrode and substantially decreased the overpotential in the detection of hydrogen peroxide. The Pt-xGnP glucose biosensor had a sensitivity of 61.5+/-0.6 microA/(mM x cm(2)) and gave a linear response up to 20 mM. The response time and detection limit (S/N=3) were determined to be 2 s and 1 microM, respectively. Therefore, this novel glucose biosensor based on the Pt nanoparticle coated xGnP is among the best reported to date in both sensing performance and production cost. In addition, the effects of metal nanoparticle loading and the particle size on the biosensor performance were systematically investigated.
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Cited by
Carbon as catalyst and support for electrochemical energy conversion
Trogadas, P., Fuller, T. F., & Strasser, P. (2014) · Carbon · doi:10.1016/j.carbon.2014.04.005 · Cited by 522
Tien, H.-W., Huang, Y.-L., Yang, S.-Y., Wang, J.-Y., & Ma, C.-C. M. (2011) · Carbon · doi:10.1016/j.carbon.2010.12.022 · Cited by 384
Metadata
- Authors
- Lu, J., Do, I., Drzal, L. T., Worden, R. M., & Lee, I.
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2008-09-03
- Volume
- 2
- Issue
- 9
- Pages
- 1825-1832
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W2036421175
- Cited by
- 438
- References
- 0
- FWCI
- 32.87
- Type
- journal article
- Language
- en
- Open access
- closed
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