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Shi J, Zhang H, Snyder A, Wang MX, Xie J, Porterfield DM, Stanciu LA. An aqueous media based approach for the preparation of a biosensor platform composed of graphene oxide and Pt-black. Biosens Bioelectron 2012; 38:314-20. [PMID: 22748962 PMCID: PMC3420981 DOI: 10.1016/j.bios.2012.06.007] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2012] [Revised: 06/04/2012] [Accepted: 06/06/2012] [Indexed: 02/01/2023]
Abstract
The combination of Pt nanoparticles and graphene was more effective in enhancing biosensing than either nanomaterial alone according to previous reports. Based on the structural similarities between water soluble graphene oxide (GrO(x)) and graphene, we report the fabrication of an aqueous media based GrO(x)/Pt-black nanocomposite for biosensing enhancement. In this approach GrO(x) acted as a nanoscale molecular template for the electrodeposition of Pt-black, an amorphously nanopatterned isoform of platinum metal. Scanning electron microscopy (SEM) images and energy-dispersive X-ray spectroscopy (EDS) showed that Pt-black was growing along GrO(x). The effective surface area and electrocatalytic activity towards H(2)O(2) oxidation of GrO(x)/Pt-black microelectrodes were significantly higher than for Pt-black microelectrodes. When used to prepare a bio-nanocomposite based on protein functionalization with the enzyme glucose oxidase (GOx), the GrO(x)/Pt-black microbiosensors exhibited improved sensitivity over the Pt-black microbiosensors. This suggested that the GrO(x)/Pt-black nanocomposite facilitated an increase in electron transfer, and/or minimized mass transport limitations as compared to Pt-black used alone. Glucose microbiosensors based on GrO(x)/Pt-black exhibited high sensitivity (465.9 ± 48.0 nA/mM), a low detection limit of 1 μM, a linear response range of 1 μM-2mM, and response time of ≈ 4s. Additionally the sensor was stable and highly selective over potential interferents.
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Affiliation(s)
- Jin Shi
- Birck-Bindley Physiological Sensing Facility, Purdue University, 1203 W. State Street, West Lafayette, IN 47907
- Department of Agricultural & Biological Engineering, Purdue University, 225 S. University Street, West Lafayette, IN 47907
| | - Hangyu Zhang
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, West Lafayette, IN 47907
| | - Alexandra Snyder
- School of Materials Engineering, Purdue University, 701 W. Stadium Avenue, West Lafayette, IN 47907
| | - Mei-xian Wang
- Department of Mechanical Engineering, Purdue School of Engineering and Technology, IUPUI, 723 W. Michigan Street, Room SL 260 M Indianapolis, IN 46202
| | - Jian Xie
- Department of Mechanical Engineering, Purdue School of Engineering and Technology, IUPUI, 723 W. Michigan Street, Room SL 260 M Indianapolis, IN 46202
| | - D. Marshall Porterfield
- Birck-Bindley Physiological Sensing Facility, Purdue University, 1203 W. State Street, West Lafayette, IN 47907
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, West Lafayette, IN 47907
- Department of Agricultural & Biological Engineering, Purdue University, 225 S. University Street, West Lafayette, IN 47907
- Department of Horticulture and Landscape Architecture, Purdue University, 625 Agriculture Mall Drive, West Lafayette, IN 47907
| | - Lia A. Stanciu
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, West Lafayette, IN 47907
- School of Materials Engineering, Purdue University, 701 W. Stadium Avenue, West Lafayette, IN 47907
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Tian J, Zhao H, Zhao H, Quan X. Photoelectrochemical immunoassay for microcystin-LR based on a fluorine-doped tin oxide glass electrode modified with a CdS-graphene composite. Mikrochim Acta 2012. [DOI: 10.1007/s00604-012-0872-8] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Brondani D, Scheeren CW, Dupont J, Vieira IC. Halloysite clay nanotubes and platinum nanoparticles dispersed in ionic liquid applied in the development of a catecholamine biosensor. Analyst 2012; 137:3732-9. [DOI: 10.1039/c2an35313j] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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