Journal article
A Graphene-Edge Ferroelectric Molecular Switch
Department of Micro- and Nanotechnology, Technical University of Denmark1
Nanocarbon, Department of Micro- and Nanotechnology, Technical University of Denmark2
Center for Nanostructured Graphene, Centers, Technical University of Denmark3
Theoretical Nanoelectronics, Department of Micro- and Nanotechnology, Technical University of Denmark4
Technical University of Denmark5
Polytechnic University of Milan6
We show that polar molecules (water, ammonia, and nitrogen dioxide) adsorbed solely at the exposed edges of an encapsulated graphene sheet exhibit ferroelectricity, collectively orienting and switching reproducibly between two available states in response to an external electric field. This ferroelectric molecular switching introduces drastic modifications to the graphene bulk conductivity and produces a large and ambipolar charge bistability in micrometer-size graphene devices.
This system comprises an experimental realization of envisioned memory capacitive (“memcapacitive”) devices whose capacitance is a function of their charging history, here conceived via confined and correlated polar molecules at the one-dimensional edge of a two-dimensional crystal.
Language: | English |
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Publisher: | American Chemical Society |
Year: | 2018 |
Pages: | 4675-4683 |
ISSN: | 15306992 and 15306984 |
Types: | Journal article |
DOI: | 10.1021/acs.nanolett.8b00797 |
ORCIDs: | 0000-0001-7373-0643 , Bøggild, Peter , Santos, Jaime Eduardo Vieira da Silva Moutinho , Gunst, Tue , Booth, Timothy J. and Brandbyge, Mads |