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Mater Sci Nanotechnol 2017 | Volume 1 Issue 2
allied
academies
Nanomaterials and Nanochemistry
November 29-30, 2017 | Atlanta, USA
International Conference on
C
VD graphene is an ideal candidate for a newclass of sensor
systems, which were not possible before. This is due to
its 2-d nature (inert, conductive where the conductivity can
be modulated when exposed to various ions, molecules,
and gases). Also, Graphene is mechanically very strong yet
flexible so that it can be applied on various shapes and
forms; in addition to its tolerance to high temperatures
(stable till 700 ᵒC). Furthermore, the electrical characteristics
of the graphene changes when chemical molecules in the
surrounding covalently or non-covalently interact with the
graphene. Thesemolecules act as dopants that shift the fermi
energy of the graphene. The goal of this work is to fabricate
a kelvins structure like sensor with a graphene mat as an
active material between four metal pads made of Aluminum
over titanium. In this study graphene sensor device based
on kelvin structure is fabricated to detect NaCl salt in water
solution. The successful operation of such a sensor opens
a path to utilizing graphene-based devices for monitoring
other scales, including CaCO
3
and BaSO
4
which are common
for scale precipitation in the oil industry. The used graphene
is grown in our lab on a copper foil, transferred to sensor
structure and used as a sensing material. The electrical
response of the fabricated sensor is studied by means of
measuring changes in the electrical resistance before and
after using the NaCl salt solution.
e:
hyounes@masdar.ac.aeFabrication of CVD graphene-based kelvin sensor for online scale monitoring system
Hammad Younes
Masdar Institute of Science and Technology, UAE