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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.

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