title: Synthesis, characterization of Ag-Au core-shell bimetal nanoparticles and its application for electrocatalytic oxidation/sensing of l-methionine.
abstract: The Ag-Au core-shell bimetal nanoparticles (BNPs) was prepared using chemical reduction method. The prepared Ag-Au core-shell BNPs were characterized by UV-Visible (UV-Vis) spectroscopy, field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD), atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) pattern. These results showed the Ag-Au BNPs exhibited core-shell shape. The Ag-Au core-shell BNPs was examined towards electrocatalytic oxidation of l-methionine (l-Met) by cyclic voltammetry (CV), linear sweep voltammetry (LSV) and chronoamperometry. According to the results, l-Met is determined with detection limit of 30μM. Interference studies in biological buffer was also studied.
authors: Department of Chemistry, Annamalai University, Annamalainagar 608 002, Tamil Nadu, India.
authors: M
authors: M
authors: Murugavelu
authors: Department of Chemistry, Annamalai University, Annamalainagar 608 002, Tamil Nadu, India. Electronic address: bkarthi_au@yahoo.com.
authors: B
authors: B
authors: Karthikeyan
mesh_terms: D015374:Biosensing Techniques / Q000379:methods*; D002384:Catalysis; D058266:Dielectric Spectroscopy; D000067493:Dynamic Light Scattering; D055664:Electrochemical Techniques; D004566:Electrodes; D006046:Gold / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008715:Methionine / Q000097:blood*; D018625:Microscopy, Atomic Force; D010084:Oxidation-Reduction; D056951:Photoelectron Spectroscopy; D015203:Reproducibility of Results; D012834:Silver / Q000737:chemistry*; D013052:Spectrometry, X-Ray Emission; D013056:Spectrophotometry, Ultraviolet; D055672:Static Electricity; D014961:X-Ray Diffraction
chemical_list: D012834:Silver; D006046:Gold; D008715:Methionine
keywords: Ag-Au core-shell; Cyclic voltammetry; Electrocatalytic; l-methionine