NDLI: Enzyme-less and low-potential sensing of glucose using a glassy carbon electrode modified with palladium nanoparticles deposited on graphene-wrapped carbon nanotubes

Content Provider	Springer Nature Link
Author	Nayak, Pranati Nair, Santhosh P. Ramaprabhu, Sundara
Copyright Year	2015
Abstract	The article describes an amperometric sensor for enzyme-less detection of glucose based on homogeneously anchored Pd nanoparticles (Pd-NPs) on graphene - wrapped carbon nanotubes (Pd-GWCNTs) as sensing matrix. The unique features of GWCNTs (such as the highly protruded outer graphene layer and an inner tubular morphology) result in enhanced electrochemical performance compared to the use of conventional multi walled carbon nanotubes (MWCNTs). Glucose electro-oxidation occurs at a rather low working potential (+50 mV vs Ag/AgCl), and glucose can be continuously sensed in 0.1 M NaOH solution in concentrations of up to 19.5 mM. The sensor possesses good reproducibility, a fast response time, stable amperometric response and a lower detection limit. Due to its low working potential, it is not interfered by dopamine, uric acid, ascorbic acid, sucrose, fructose and lactose. We presume that these beneficial properties are a result of the synergetic advantages of using catalytic Pd NPs and graphene wrapped CNTs, both of which facilitate low-potential electrooxidation of glucose. Graphical abstract Enzyme-less sensing of glucose is demonstrated at a low working potential using a glassy carbon electrode modified with palladium nanoparticles anchored on highly wrinkled graphene wrapped carbon nanotubes.
Starting Page	1055
Ending Page	1062
Page Count	8
File Format	PDF
ISSN	00263672
Journal	Microchimica Acta
Volume Number	183
Issue Number	3
e-ISSN	14365073
Language	English
Publisher	Springer Vienna
Publisher Date	2015-12-30
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Solar reduction Glucose sensor Nonenzymatic sensing Electro-oxidation Amperometry Cyclic voltammetry HRTEM XPS Raman spectroscopy Nanochemistry Nanotechnology Characterization and Evaluation of Materials Analytical Chemistry Microengineering
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry

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