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Pacakova, Barbara ; Vullum, Per Erik ; Kirch, Alexsandro ; Breu, Josef ; Miranda, Caetano Rodrigues ; Fossum, Jon Otto:
Large bandgap insulating superior clay nanosheets.
In: MRS Bulletin.
Bd. 47
(2022)
Heft 12
.
- S. 1198-1203.
ISSN 0883-7694
DOI: https://doi.org/10.1557/s43577-022-00349-8
Abstract
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.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Keywords: | X-RAY-DIFFRACTION; OPTICAL-PROPERTIES; H-BN; MICA; GAP; INTERCALATION; SPECTROSCOPY; INSIGHTS; NA |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Lehrstuhl Anorganische Chemie I > Lehrstuhl Anorganische Chemie I - Univ.-Prof. Dr. Josef Breu |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Eingestellt am: | 06 Apr 2023 06:47 |
| Letzte Änderung: | 06 Apr 2023 06:47 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/75848 |