Abstract
An electrochemiluminescence (ECL) sensor was developed with carboxylated graphene-loaded [email protected] core-shell nanoparticles. Scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscope (TEM) and inductive coupling plasma (ICP) were applied to characterizing COOH-G/[email protected] nanocomposites. Electrochemical performance of the nanocomposites was evaluated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Based on ECL experimental results, we can find COOH-G/@[email protected] nanocomposites have good electrocatalytic ability for glucose, so we construct a glucose electrochemiluminescence (ECL) sensor. When the glucose concentration range is from 0.005 to 1500 μM, the linear response of ECL intensity to glucose concentration was valid with detection limit of 0.02 μM. In addition, the developed sensor not only has good stability, repeatability and sensitivity for the detection of glucose, but also can be successfully used for glucose monitoring in human serum samples.
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