期刊
BIOSENSORS & BIOELECTRONICS
卷 63, 期 -, 页码 325-330出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2014.07.059
关键词
Carbon tetrabromide precursor; Chemical vapor deposition; Carbon nanotube nanocomposite; Nickel nanoparticle electrocatalyst; Atomic layer deposition; Enzyme-free glucose biosensor
类别
资金
- National Research Foundation of Korea (NRF) - Ministry of Science, ICTAMP
- Future Planning (MSIP) [2011-0028594]
- Converging Research Center Program through the MSIP [20131(000173)]
- National Research Foundation of Korea [2011-0028594] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A useful strategy has been developed to fabricate carbon-nanotube-nickel (CNT-Ni) nanocomposites through atomic layer deposition (ALD) of Ni and chemical vapor deposition (CVD) of functionalized CNTs. Various techniques, including scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS), were used to characterize the morphology and the structure of as-prepared samples. It was confirmed that the products possess uniform Ni nanoparticles that are constructed by finely controlled deposition of Ni onto oxygen or bromine functionalized CNT surface. Electrochemical studies indicate that the CNT-Ni nanocomposites exhibit high electrocatalytic activity for glucose oxidation in alkaline solutions, which enables the products to be used in enzyme-free electrochemical sensors for glucose determination. It was demonstrated that the CNT-Ni glucose biosensor offers a variety of merits, such as a wide linear response window for glucose concentrations of 5 mu M-2 mM, short response time (3 s), a low detection limit (2 mu M), high sensitivity (1384.1 mu A mM(-1) cm(-2)), and good selectivity and repeatability. (C) 2014 Elsevier B.V. All rights reserved.
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