Functionalized single-walled carbon nanohorns for electrochemical biosensing

Liu, Xiaoqing, Li, Haijuan, Wang, Fuan, Zhu, Shuyun, Wang, Yuling and Xu, Guobao (2010) Functionalized single-walled carbon nanohorns for electrochemical biosensing. Biosensors and Bioelectronics, 25 10: 2194-2199. doi:10.1016/j.bios.2010.02.027


Author Liu, Xiaoqing
Li, Haijuan
Wang, Fuan
Zhu, Shuyun
Wang, Yuling
Xu, Guobao
Title Functionalized single-walled carbon nanohorns for electrochemical biosensing
Journal name Biosensors and Bioelectronics   Check publisher's open access policy
ISSN 0956-5663
1873-4235
Publication date 2010-01-01
Year available 2010
Sub-type Article (original research)
DOI 10.1016/j.bios.2010.02.027
Open Access Status Not yet assessed
Volume 25
Issue 10
Start page 2194
End page 2199
Total pages 6
Place of publication Amsterdam, The Netherlands
Publisher Elsevier BV
Language eng
Subject 1304 Biophysics
2204 Religion and Religious Studies
1305 Biotechnology
1603 Demography
Abstract Single-walled carbon nanohorns (SWNHs), distinguished by their high purity and distinct structure, were noncovalently functionalized with poly(sodium 4-styrenesulfonate). The functionalized SWNHs were characterized by scanning electron microscopy, atomic force microscopy, ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, and thermogravimetry. Heme protein myoglobin was adsorbed onto surface of functionalized SWNHs to prepare electrochemical biosensor. Surface assembly process and direct electrochemistry of immobilized myoglobin were investigated by electrochemical impedance spectroscopy and cyclic voltammetry, respectively. The proposed biosensor exhibited good electrocatalysis to the reduction of hydrogen peroxide. The response was linear over the range 3-350μM with a detection limit of 0.5μM. Good reproducibility and stability of the biosensor were obtained toward hydrogen peroxide detection.
Keyword Biosensors
Carbon nanohorns
Carbon nanotubes
Heme proteins
Noncovalent functionalization
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Institute for Molecular Bioscience - Publications
 
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