A Graphene-Edge Ferroelectric Molecular Switch

Research output: Contribution to journalJournal article – Annual report year: 2018Researchpeer-review

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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.
Original languageEnglish
JournalNano letters
Volume18
Issue number8
Pages (from-to)4675-4683
Number of pages9
ISSN1530-6984
DOIs
Publication statusPublished - 2018
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • Graphene edges, Polar molecules, Ferroelectricity, Mqemcapacitor, Hysteresis, Molecular switch

ID: 152181006