Schemes for single electron transistor based on double quantum dot islands utilizing a graphene nanoscroll, carbon nanotube and fullerene

Khademhosseini, V., Dideban, D., Ahmadi, M. T. and Heidari, H. (2022) Schemes for single electron transistor based on double quantum dot islands utilizing a graphene nanoscroll, carbon nanotube and fullerene. Molecules, 27(1), 301. (doi: 10.3390/molecules27010301)

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The single electron transistor (SET) is a nanoscale switching device with a simple equivalent circuit. It can work very fast as it is based on the tunneling of single electrons. Its nanostructure contains a quantum dot island whose material impacts on the device operation. Carbon allotropes such as fullerene (C60), carbon nanotubes (CNTs) and graphene nanoscrolls (GNSs) can be utilized as the quantum dot island in SETs. In this study, multiple quantum dot islands such as GNS-CNT and GNS-C60 are utilized in SET devices. The currents of two counterpart devices are modeled and analyzed. The impacts of important parameters such as temperature and applied gate voltage on the current of two SETs are investigated using proposed mathematical models. Moreover, the impacts of CNT length, fullerene diameter, GNS length, and GNS spiral length and number of turns on the SET’s current are explored. Additionally, the Coulomb blockade ranges (CB) of the two SETs are compared. The results reveal that the GNS-CNT SET has a lower Coulomb blockade range and a higher current than the GNS-C60 SET. Their charge stability diagrams indicate that the GNS-CNT SET has smaller Coulomb diamond areas, zero-current regions, and zero-conductance regions than the GNS-C60 SET.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Heidari, Professor Hadi
Creator Roles:
Heidari, H.Validation
Authors: Khademhosseini, V., Dideban, D., Ahmadi, M. T., and Heidari, H.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Molecules
ISSN (Online):1420-3049
Published Online:04 January 2022
Copyright Holders:Copyright © 2022 The Authors
First Published:First published in Molecules 27(1): 301
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
304896EPSRC-IAA: Early Stage Commercialisation of a PET Imaging Agent for the Detection of Cardiovascular Disease and CancerAndrew SutherlandEngineering and Physical Sciences Research Council (EPSRC)EP/R511705/1Chemistry