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Structural Characterization of Graphene Nanosheets for Miniaturization of Potentiometric Urea Lipid Film Based Biosensors
Author(s) -
Nikoleli GeorgiaParaskevi,
Israr Muhammad Q.,
Tzamtzis Nikolaos,
Nikolelis Dimitrios P.,
Willander Magnus,
Psaroudakis Nikolas
Publication year - 2012
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201200104
Subject(s) - graphene , biosensor , potentiometric titration , urea , materials science , fourier transform infrared spectroscopy , characterization (materials science) , nanotechnology , chemical engineering , electrode , analytical chemistry (journal) , chemistry , chromatography , organic chemistry , engineering
The present article describes a miniaturized potentiometric urea lipid film based biosensor on graphene nanosheets. Structural characterization of graphene nanosheets for miniaturization of potentiometric urea lipid film based biosensors have been studied through atomic force microscopy (AFM) and transmission electron microscopy (TEM) measurements. UV‐Vis and Fourrier transform IR (FTIR) spectroscopy have been utilized to study the pre‐ and postconjugated surfaces of graphene nanosheets. The presented potentiometric urea biosensor exhibits good reproducibility, reusability, selectivity, rapid response times (∼4 s), long shelf life and high sensitivity of ca. 70 mV/decade over the urea logarithmic concentration range from 1×10 −6 M to 1×10 −3 M.