Journal
ANALYST
Volume 135, Issue 7, Pages 1726-1730Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c000316f
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Funding
- NTU
- AcRF Tier 1
- MOE, POC [RG 20/07]
- DB, CRP [S08/1-82563404]
- NRF [NRF-CRP2-2007-0]
- A*STAR [092 101 0064]
- Centre for Biomimetic Sensor Science at NTU in Singapore
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Single-walled carbon nanotube (SWCNT) microarrays are successfully patterned on SiO2 substrates based on an evaporation-induced self-assembly mechanism. On these SWCNT micropatterns, the highly electroactive polycrystalline Pt nanoparticles (PtNPs) are deposited by using the electrochemical method. The obtained PtNP-SWCNT nanocomposites exhibit a low detection limit for hydrogen peroxide (4 mu M). The further investigation on a glucose oxidase (GOx)/BSA/PtNP-SWCNT based biosensor indicates that the detection limit and sensitivity for glucose are 0.04 mM and 4.54 mu A mM(-1) cm(-2), respectively. Our results prove that the improved electrocatalytic activity originates from the PtNP-SWCNT micropatterns, which provide a potential platform to immobilize different enzymes used for bioelectrochemical applications.
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