electrodeposition of flower-like nickel oxide on single layer graphene
TRANSCRIPT
Electrodeposition of flower-like nickel oxide onCVD-grown graphene to develop an
electrochemical non-enzymatic biosensor
Arunkumar Rengaraj,‡a Yuvaraj Haldorai,‡b Cheol Hwan Kwak,a Seungbae Ahn,cKi-Joon Jeon,c Seok Hoon Park,d Young-Kyu Han*b and Yun Suk Huh
aDepartment of Biological Engineering, Biohybrid Systems Research Center (BSRC), Inha University, Republic of Korea
bDepartment of Energy and Materials Engineering, Dongguk University-Seoul, Republic of Korea
cDepartment of Environmental Engineering, Inha University, Republic of Korea
J. Mater. Chem. B
Inha universityDepart. Of Biological EngineeringNano-Bio Analysis Lab, Yun's Group
Introduction
Cholesterol
Lipid molecule
Required to maintain both membrane
structural integrity and fluidity
plantcentric.wordpress.com
Inha universityDepart. Of Biological EngineeringNano-Bio Analysis Lab, Yun's Group
www.cellbiol.net
Introduction
Inha universityDepart. Of Biological EngineeringNano-Bio Analysis Lab, Yun's Group
Introduction
Inha universityDepart. Of Biological EngineeringNano-Bio Analysis Lab, Yun's Group
• The only problem with the graphene is that high quality graphene is a great conductor that does not have a band gap (It cant be switched off).
• To use Graphene in the creation of future nana electronic devices ,a band gap will need to engineered.
Introduction
Inha universityDepart. Of Biological EngineeringNano-Bio Analysis Lab, Yun's Group
• A mediator is a low molecular weight redox couple which can transfer electrons from the active site of the enzyme to the surface of the electrode, thereby
establishing electrical contact between the two.
• The purpose of using metallised electrodes is to créate conditions in which the oxidation of enzymatically generated H2O2 can be achieved at a lower applied
potential, by creating a highly catalytic surface.
• In addition to reducing the effect of interferents, due to the lower applied potential, the signal-to-noise ratio is increased due to an increased electrochemically
active area.
• Nickel 's high electrical conductivity lends itself to many electronics applications.
• Nickel oxide/active carbon composites as the electrode materials for super-capacitors
NiO as a mediator
Introduction
Inha universityDepart. Of Biological EngineeringNano-Bio Analysis Lab, Yun's Group
Mechanism of Cholesterol sensor
Scheme
Inha universityDepart. Of Biological EngineeringNano-Bio Analysis Lab, Yun's Group
Characterization
Inha universityDepart. Of Biological EngineeringNano-Bio Analysis Lab, Yun's Group
Characterization
Inha universityDepart. Of Biological EngineeringNano-Bio Analysis Lab, Yun's Group
Characterization
Inha universityDepart. Of Biological EngineeringNano-Bio Analysis Lab, Yun's Group
ElectrochemicalCharacterization
Inha universityDepart. Of Biological EngineeringNano-Bio Analysis Lab, Yun's Group
Sensing of Cholesterol
Inha universityDepart. Of Biological EngineeringNano-Bio Analysis Lab, Yun's Group
Sensing of Cholesterol
Inha universityDepart. Of Biological EngineeringNano-Bio Analysis Lab, Yun's Group
Stability of the sample
Inha universityDepart. Of Biological EngineeringNano-Bio Analysis Lab, Yun's Group
Comparison
Inha universityDepart. Of Biological EngineeringNano-Bio Analysis Lab, Yun's Group
Conclusion