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Volume 4
Nano Research & Applications
ISSN: 2471-9838
Page 88
&
JOINT EVENT
October 04-05, 2018 Moscow, Russia
2
nd
Edition of International Conference on
26
th
International Conference on
Advanced Nanotechnology
Materials Technology and Manufacturing Innovations
Advanced Nanotechnology 2018
& Materials-Manufacturing 2018
October 04-05, 2018
Ionizing radiation sensors based on carbon nanotubes
Kenneth Fontánez
1
, Molina B
1
, Cotto M
1
, Duconge J
1
, Morant C
2
, Pinilla S
2
and
Márquez F
1
1
Universidad of Turabo, USA
2
Universidad Autónoma de Madrid, Spain
C
arbon nanotubes (CNTs) are attracting much attention as promising materials for application in nanodevices
due to their excellent electrical conductivity, optical, thermal and mechanical properties arising from their quasi-
one-dimensional structure. Among these potential applications, the use of SWNTs as ionization radiation sensors is
particularly of relevant interest. One of the key features of SWNTs for electronic and optoelectronic applications are that
their metallic or semiconductive character depends on the chirality. The presence of a defect in the nanotube walls, i.e.
a single atom missing, can result, locally, in the change of the chirality, thus into the variation of the nanotube electronic
characteristics (semiconductor-metal junction) within a structure that is only a few nanometers wide. Variations of these
electrical properties may be measured and, from these results, a clear correlation with the dose of radiation generated
by the local defect in the nanotube can be established. In this investigation, we have deposited CNTs using an inter-
digitalized growth pattern (see Figure), which has been connected to two gold electrodes. The morphological and
structural properties of the CNTs before and after exposure to ion implantation were characterized by SEM, TEM, and
Raman. The conductivity measured by this device was evaluated before and after being exposed to different doses of ion
implantation, using an Ar+ gun. The results obtained clearly show a continuous decrease in conductivity, as the time
of ion implantation increases. These results open a wide range of applications of these materials in the development of
radiation sensors.
kenneth.fontanez@gmail.comNano Res Appl 2018, Volume 4
DOI: 10.21767/2471-9838-C5-021