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.