期刊
ANALYTICA CHIMICA ACTA
卷 819, 期 -, 页码 94-101出版社
ELSEVIER
DOI: 10.1016/j.aca.2014.02.017
关键词
Hollow gold ruthenium; Nonenzymatic ascorbic acid sensor; Electrocatalyst; Amperometric sensor; Biosensor
资金
- Basic Science Program through the National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2013-020688, 2011-0015619]
- National Research Foundation of Korea [2011-0015619] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We report a new nonenzymatic amperometric detection of ascorbic acid (AA) using a glassy carbon (GC) disk electrode modified with hollow gold/ruthenium (hAu-Ru) nanoshells, which exhibited decent sensing characteristics. The hAu-Ru nanoshells were prepared by the incorporation of Ru on hollow gold (hAu) nanoshells from Co nanoparticle templates, which enabled AA selectivity against glucose without aid of enzyme or membrane. The structure and electrocatalytic activities of the hAu-Ru catalysts were characterized by spectroscopic and electrochemical techniques. The hAu-Ru loaded on GC electrode (hAu-Ru/GC) showed sensitivity of 426 mu A mM(-1) cm(-2) (normalized to the GC disk area) for the linear dynamic range of <5 mu M to 2 mM AA at physiological pH. The response time and detection limit were 1.6 s and 2.2 mu M, respectively. Furthermore, the hAu-Ru/GC electrode displayed remarkable selectivity for ascorbic acid over all potential biological interferents, including glucose, uric acid (UA), dopamine (DA), 4-acetamidophenol (AP), and nicotinamide adenine dinucleotide (NADH), which could be especially good for biological sensing. (C) 2014 Elsevier B.V. All rights reserved.
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