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231224s2015 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.5b03273
|2 doi
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|a pubmed24n0848.xml
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|a (NLM)26551320
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Terse-Thakoor, Trupti
|e verfasserin
|4 aut
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|a Electrochemically Functionalized Seamless Three-Dimensional Graphene-Carbon Nanotube Hybrid for Direct Electron Transfer of Glucose Oxidase and Bioelectrocatalysis
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|c 2015
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 16.09.2016
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|a Date Revised 01.12.2015
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Three-dimensional seamless chemical vapor deposition (CVD) grown graphene-carbon nanotubes (G-CNT) hybrid film has been studied for its potential in achieving direct electron transfer (DET) of glucose oxidase (GOx) and its bioelectrocatalytic activity in glucose detection. A two-step CVD method was employed for the synthesis of seamless G-CNT hybrid film where CNTs are grown on already grown graphene film on copper foil using iron as a catalyst. Physical characterization using SEM and TEM show uniform dense coverage of multiwall carbon nanotubes (MWCNT) grown directly on graphene with seamless contacts. The G-CNT hybrid film was electrochemically modified to introduce oxygenated functional groups for DET favorable immobilization of GOx. Pristine and electrochemically functionalized G-CNT film was characterized by electrochemical impedance spectroscopy (EIS), cyclic voltammetry, X-ray photoelectron-spectroscopy, and Raman spectroscopy. The DET between GOx and electrochemically oxidized G-CNT electrode was studied using cyclic voltammetry which showed a pair of well-defined and quasi-reversible redox peaks with a formal potential of -459 mV at pH 7 corresponding to the redox site of GOx. The constructed electrode detected glucose concentration over the clinically relevant range of 2-8 mM with the highest sensitivity of 19.31 μA/mM/cm(2) compared to reported composite hybrid electrodes of graphene oxide and CNTs. Electrochemically functionalized CVD grown seamless G-CNT structure used in this work has potential to be used for development of artificial mediatorless redox enzyme based biosensors and biofuel cells
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a Enzymes, Immobilized
|2 NLM
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|a Nanotubes, Carbon
|2 NLM
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|a Graphite
|2 NLM
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|a 7782-42-5
|2 NLM
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|a Glucose Oxidase
|2 NLM
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| 650 |
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|a EC 1.1.3.4
|2 NLM
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| 700 |
1 |
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|a Komori, Kikuo
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ramnani, Pankaj
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lee, Ilkeun
|e verfasserin
|4 aut
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| 700 |
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|a Mulchandani, Ashok
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 31(2015), 47 vom: 01. Dez., Seite 13054-61
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:31
|g year:2015
|g number:47
|g day:01
|g month:12
|g pages:13054-61
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|u http://dx.doi.org/10.1021/acs.langmuir.5b03273
|3 Volltext
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|d 31
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|h 13054-61
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