کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7145605 1462071 2015 35 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Single-step electrochemical deposition of high performance Au-graphene nanocomposites for nonenzymatic glucose sensing
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Single-step electrochemical deposition of high performance Au-graphene nanocomposites for nonenzymatic glucose sensing
چکیده انگلیسی
In this paper, high-quality three-dimensional (3D) nanocomposites (Au nanoparticles anchored on graphene, denoted as Au-gra) were synthesized by a simple electrochemical approach, in which the reduction of Au ions and graphene oxide were achieved with a one-step process. The resulting hybrids were characterized by field-emission scanning electron microscopy (FE-SEM), Raman spectroscopy, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). It is found that Au nanoparticles have been successfully supported on the surface of graphene, and the nanocomposites uniformly modified on the electrode with 3D porous structures. Based on cyclic voltammetry and amperometric results, Au-gra efficiently catalyzed the oxidation of glucose in neutral media (0.1 M PBS, pH 7.4) and exhibited a rapid response time (about 3 s), a broad linear range (0.1-16 mM), good stability, and sensitivity estimated to be 4.56 μA cm−2 mM−1 (R = 0.992, 285.8 μA cm−2 mM−1 vs. geometric area). The electrochemical experiments were performed at a relatively low detection potential (i.e., 0 V), under which the impact from the oxidation of common interfering species could be effectively limited. These results indicated a great potential of Au-gra in fabricating novel non-enzymatic glucose sensors with high performance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 220, 1 December 2015, Pages 331-339
نویسندگان
, , , , , , , ,