期刊
JOURNAL OF LUMINESCENCE
卷 184, 期 -, 页码 110-116出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2016.12.006
关键词
Graphene; Graphene quantum dots; Optical sensor; Photoluminance; Glucose sensor
类别
Quantum Dots (QDs) show promise materials for many technological applications. In this work we utilized a simple route to prepare graphene quantum dots (GQDs) using glucose carbonization. GQDs functionalized with phenylboronic add receptors were employed as a sensing material for a nonenzymatic glucose sensor. Photoluminance spectra of GQDs were used as a property of optical sensor for glucose. GQDs considered as a good sensing probe because of its low toxicity, high photoluminance, water solubility and excelent photochemical properties. The prepared GQDs were characterized using UV-visible, Raman and photoluminance spectroscopies, X-ray diffraction and high resolution transmission electron microscopy (HRTEM). HRTEM micrographs confirmed the preparation of 7-10 nm GQDs and the emission peak of the GQDs appeared at 450 nm. The developed sensor has linear response to glucose over a concentration range of 4-40 mM with a correlation coefficient of 0.97 and a low detection limit of approximately 3.0 mM. (C) 2016 Elsevier B.V. All rights reserved.
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