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Large bandgap insulating superior clay nanosheets

Title data

Pacakova, Barbara ; Vullum, Per Erik ; Kirch, Alexsandro ; Breu, Josef ; Miranda, Caetano Rodrigues ; Fossum, Jon Otto:
Large bandgap insulating superior clay nanosheets.
In: MRS Bulletin. Vol. 47 (2022) Issue 12 . - pp. 1198-1203.
ISSN 0883-7694

Abstract in another language

One can find conductive, semiconducting, and insulating single nanosheets with unique electronic properties that are tied to their two-dimensional (2D) structure. Here, we report on wide-bandgap 2D insulator nanosheets obtained by delamination of a synthetic 2D fluorohectorite clay mineral showing one of the largest bandgap insulators in the world. The bandgap was determined experimentally to be up to 7.1-8.2 eV measured by electron energy-loss spectroscopy in a high-resolution transmission electron microscope. The experimental data were supported by DFT calculations giving a bandgap of 5.5 eV. The single fluorohectorite clay crystalline nanosheets are 0.95-nm, and they can be synthetized with high-aspect ratios and lateral dimensions up to dozens of microns. These properties render these nanosheets promising candidates for practical applications in manually assembled or self-assembled electronic heterostructures, potentially serving as insulating nanosheets in graphene or various (semi)conductive 2D material-based devices.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry I > Chair Inorganic Chemistry I - Univ.-Prof. Dr. Josef Breu
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 06 Apr 2023 06:47
Last Modified: 06 Apr 2023 06:47