Molybdenum disulfide nanosheet decorated with silver nanoparticles for selective detection of dopamine
Document Type
Article
Publication Date
1-1-2019
Abstract
A metal-inorganic composite, comprises of silver-molybdenum disulfide nanosheets (Ag@MoS2) was synthesized at low temperature. The Ag@MoS2 composite was drop-casted onto a glassy carbon electrode (GCE) for a highly selective dopamine (DA) detection in the presence of interfering compounds such as uric acid (UA) and ascorbic acid (AA). The physicochemical analysis of the nanosheets was carried out with X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. The as-prepared Ag@MoS2-modified GCE displayed excellent electrocatalytic activity toward DA oxidation, with a 0.2 μM detection limit at a signal-to-noise ratio of 3 and an extensive linear detection range from 1 μM to 500 μM (R2 = 0.9983). The fabricated non-enzymatic electrochemical sensor demonstrated superior selectivity and stability for the detection of DA with the removal of AA and UA interfering compounds.
Keywords
Molybdenum disulfide, Silver nanoparticles, Dopamine, Sensor
Divisions
CHEMISTRY,PHYSICS,nanocat
Funders
Frontier Research Grant (FG030-17AFR),Faculty Research Grant (GPF064B 2018),University Malaya Centre for Ionic Liquids (UMCiL),UMRG Programme for Frontier Science (AFR) (Grant no: RP038C-17AFR)
Publication Title
Colloids and Surfaces B: Biointerfaces
Volume
176
Publisher
Elsevier