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Gold nanoparticles (GNPs) were electrochemically deposited on the graphene and chitosan modified glassy carbon electrode and characterized by scanning electron microscope and cyclic voltammetry, respectively. A simple non-enzymatic H 2 O 2 sensor was developed based on the direct electrochemistry of H 2 O 2 in the presence of GNPs. Under the optimized conditions, the...
An electrochemical cholesterol biosensor based on the direct electron transfer of cholesterol oxidase (ChOx) immobilized on gold nanoparticles-decorated multiwalled carbon nanotubes (GNPs-MWCNTs) was fabricated. GNPs-MWCNTs were prepared based on the reduction of HAuCl 4 in the presence of carboxyl group functionalized MWCNTs. Transmission electron microscopy image shows that rounded gold...
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