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Non-Enzymatic Glucose Electrochemical Sensor Based on Silver Nanoparticle Decorated Organic Functionalized Multiwall Carbon Nanotubes,378. Ali A. Ensafi, N. Zandi-Atashbar, B. Rezaei, M. Ghiaci, M. Esmaili Chermahini, RSC Advances, 2016, 6, 60926-60932.
An e ffi cient, fast and stable non-enzymatic glucose sensor was prepared by decorating silver nanoparticles
on organic functionalized multiwall carbon nanotubes (AgNPs/F-MWCNTs). MWCNTs were functionalized
with organic amine chains and characterized using energy-dispersive X-ray and FT-IR spectroscopy.
Moreover, the decorated AgNPs monitored using transmission electron microscopy showed spherical
shapes with a mean size of 9.0 2.8 nm. For further study, a glassy carbon electrode (GCE) was
modi fi ed using the synthesized composite and evaluation of the modi fi cation was conducted using
cyclic voltammetry and electrochemical impedance spectroscopy. The electrochemical data revealed
that modi fi cation of the GCE leads to easier electron transfer compared to the bare unmodi fi ed GCE due
to the presence of the functionalized MWCNTs accompanied with the electrocatalytic e ff ect of the
decorated silver nanoparticles. Furthermore, the fabricated modi fi ed electrode was applied as a non-
enzymatic glucose sensor using electrochemical techniques including cyclic voltammetry and
hydrodynamic chronoamperometry. The results obtained from the amperometric analysis of glucose in
a 0.1 M NaOH solution indicated an e ffi cient performance of the electrode with a low detection limit of
0.03 m M and a high sensitivity of 1057.3 m A mM 1 , as well as a linear dynamic range of 1.3 to 1000 m M. A
practical application of this sensor was also examined by analyzing glucose in the presence of common
interfering species that exist in a real sample of human blood serum.