Research on Cu2 + trace detection of electrochemical biosensor based on composites of gold nanoparticles/reduced graphene oxide
LIANG Chong-jia
GUO Chuan-pan
FENG Xiao-zhong
WANG Ming-hua
ZHANG Zhi-hong
Abstract：The composites of gold nanoparticles/reduced graphene oxide (AuNPs/rGO)was synthesized by liquid phase one-step co-reduction method.The crystal structure and the surface morphology were character-ized by XRD and SEM.XPS was employed to characterize the chemical components before and after DNA ab-sorbed on AuNPs/rGO composites.Additionally,electrochemical impedance spectroscopy (EIS)was used to measure the electrochemical property changes of Cu2 + detection.The results showed that the AuNPs/rGO com-posites had good crystal structure.Comparing with graphene oxide,there were wrinkles and gold nanoparticles on the AuNPs/rGO composites surface.The XPS spectra showed that DNA was immobilized on the AuNPs/rGO composites surface successfully.And the developed electrochemical biosensor exhibited high sensitivity toward the determination Cu2 + with a low detection limit of 0.02 nmol /L.This biosensor aslo showed high se-lectivity and reusability.
Keywords：composites of AuNPs/rGOelectrochemical biosensorCu2 + trace detection
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 96-104 )