期刊
BIOSENSORS & BIOELECTRONICS
卷 60, 期 -, 页码 325-331出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2014.04.044
关键词
Electrogenerated chemiluminescence; Sensor; C-60; Gold nanoparticles; L-Cysteine; Phenolic compounds
类别
资金
- National Natural Science Foundation of China [21075100, 21275119]
- Specialized Research Fund for the Doctoral Program of Higher Education [20100182110015]
- State Key Laboratory of Electroanalytical Chemistry (SKLEAC) [2010009]
- Natural Science Foundation Project of Chongqing City [CSTC-2011BA7003]
- Fundamental Research Funds for the Central Universities [XDJK2012A004]
This paper described a novel strategy for the construction of an electrogenerated chemiluminescence (ECL) sensor based on gold nanoparticles@C-60 (AuNPs@C-60) hybrid for detecting phenolic compounds. First, C-60 was functionalized with L-cysteine. Subsequently, with C-60 as the core, gold nanoparticles (AuNPs) are synthesized and grown through an in situ reduction method in the presence of ascorbic acid (AA). The resulted flowerlike AuNPs@C-60 nanoparticles were modified onto the glassy carbon electrode to achieve the sensor (AuNPs@C-60/GCE). Here, L-cysteine not only can improve the biocompatibility and hydrophilicity of C-60 but also can enhance the electrogenerated chemiluminescence (ECL) of peroxydisulfate system. Furthermore, both AuNPs and C-60 are also beneficial to the ECL of the peroxydisulfate system. Due to the combination of L-cysteine, AuNPs and C-60, the proposed ECL sensor exhibited an excellent analytical performance. Under an optimum condition, the ECL intensity increased linearly with phenolic compounds. The linear ranges of 6.2 x 10(-8)-1.2 x 10(-4) M, 5.0 x 10(-8)-1.1 X 10(-4) M and 5.0 x 10(-8)-1.1 x 10(-4) M were obtained for catechol (CC), hydroquinone (HQ) and p-cresol (PC), respectively, and the detection limits were 2.1 x 10(-8) M, 1.5 x 10(-8) M and 1.7 x 10(-8) M, respectively. The AuNPs@C-60 hybrid might hold a new opportunity to develop an ECL sensor. (C) 2014 Elsevier B.V. All rights reserved.
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