Structural Characterization of Graphene Nanosheets for Miniaturization of Potentiometric Urea Lipid Film Based Biosensors |
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| Authors: | Georgia‐Paraskevi Nikoleli Muhammad Q Israr Nikolaos Tzamtzis Dimitrios P Nikolelis Magnus Willander Nikolas Psaroudakis |
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| Institution: | 1. Laboratory of Inorganic & Analytical Chemistry, School of Chemical Engineering, Dept 1, Chemical Sciences, National Technical University of Athens, 9 Iroon Polytechniou St., Athens 157 80, Greece;2. Department of Science and Technology, Campus Norrk?ping, Link?ping University, SE‐60174 Norrk?ping, Sweden;3. Laboratory of Environmental Chemistry, Department of Chemistry, University of Athens, Panepistimiopolis‐Kouponia, GR‐15771 Athens, Greece tel: ++302107274754;4. Laboratory of Inorganic Chemistry, Department of Chemistry, University of Athens, Panepistimiopolis‐Kouponia, GR‐15771 Athens, Greece |
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| Abstract: | 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. |
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| Keywords: | Stabilized lipid films Urea biosensors Electrochemistry Graphene nanosheets Miniaturization |
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