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Electrical Tunability of Surface Tension of Vertical Graphene Nanosheets

Published online by Cambridge University Press:  15 April 2020

Mahmood Akbari ,
Mohammed Kamruddin ,
Razieh Morad  and
Malik Maaza
Mahmood Akbari*
Affiliation:
UNESCO-UNISA Africa Chair in Nanoscience & Nanotechnology (U2ACN2), College of Graduate Studies, University of South Africa (UNISA), Pretoria, South Africa Nanoscience African Network (NANOAFNET), Material Research Division, iThemba LABS-National Research Foundation, Somerset West, 7129, South Africa
Mohammed Kamruddin
Affiliation:
Surface and Nanoscience Division, Materials Science Group, Indira Gandhi Centre for Atomic Research, Tamil Nadu-603102, India
Razieh Morad
Affiliation:
UNESCO-UNISA Africa Chair in Nanoscience & Nanotechnology (U2ACN2), College of Graduate Studies, University of South Africa (UNISA), Pretoria, South Africa Nanoscience African Network (NANOAFNET), Material Research Division, iThemba LABS-National Research Foundation, Somerset West, 7129, South Africa
Malik Maaza
Affiliation:
UNESCO-UNISA Africa Chair in Nanoscience & Nanotechnology (U2ACN2), College of Graduate Studies, University of South Africa (UNISA), Pretoria, South Africa Nanoscience African Network (NANOAFNET), Material Research Division, iThemba LABS-National Research Foundation, Somerset West, 7129, South Africa
*
*(Email: makbari@tlabs.ac.za)
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Abstract

The contact angle is a material property determined by the surface tensions between substrate, liquid and the air. In this study, the surface wettability of vertical graphene nanosheets (VGNs) which are carbon nanostructures consisting of a few layers of graphene sheets vertically standing on the substrates, were developed by applying different voltages on the substrate. The contact angle of the water droplet on VGNs/Cu decreased from 123° to 16° with increasing the applied voltage which indicated the hydrophobic and hydrophilic transition of VGNs surfaces. It is anticipated that this member of the carbon material family (VGNs) could serve as a tunable wettability coting for future improvements in electronic devices and open a new perspective to the construction of smart material surfaces.

Keywords

2D materialsgraphenemorphologynanostructureplasma-enhanced CVD (PECVD) (deposition)
Type
Articles
Information
MRS Advances , Volume 5 , Issue 44: Nanoscale and Quantum Materials , 2020 , pp. 2291 - 2298
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Copyright
Copyright © Materials Research Society 2020

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