期刊
BIOSENSORS & BIOELECTRONICS
卷 96, 期 -, 页码 186-193出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2017.05.014
关键词
Gold-silver alloy; Graphene; Encapsulation; Electrocatalysts; Serotonin; Electrochemical sensors
类别
资金
- Basic Research Program through the National Research Foundation (NRF) - Ministry of Science, ICT & Future Planning of Republic of Kore [2017R1A2B3004917, 2014R1A4A1008140, 2016M3A-7B4900117]
- National Research Foundation of Korea [2017R1A2B3004917, 2016M3A7B4900117, 2014R1A4A1008140] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A high quality graphene-encapsulated AuAg alloy (AuAg-GR) nanohybrid with homogeneous structure and good reproducibility over a desired area was successfully fabricated. Taking benefits of the unique architecture, such nanohybrid was employed as an efficient electrocatalyst for sensing application. The AuAg-GR based sensor could sensitively detected neurotransmitter serotonin (5-HT) with wide linear detection range (2.7 nM to 4.82 mu M), very low detection limit (1.6 nM), negligible interference, and excellent reproducibility. In addition, AuAg-GR based sensor accurately determined 5-HT in human serum samples. This is due to the enhanced catalytic activity of GR nanosheets-encapsulated AuAg nanostructures, which possessed well monodispersion of AuAg alloy, greater electrochemical active sites, and good charge transfer possibility. The obtained results imply that such nanohybrid is a potential candidate for synthesizing electrochemical sensors in requirement of high sensitivity, long-term stability, and good reproducibility.
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