Exfoliation of Alpha-Germanium : A Covalent Diamond-Like Structure

Détails bibliographiques
Publié dans:	Advanced materials (Deerfield Beach, Fla.). - 1998. - 33(2021), 10 vom: 12. März, Seite e2006826
Auteur principal:	Gibaja, Carlos (Auteur)
Autres auteurs:	Rodríguez-San-Miguel, David, Paz, Wendel S, Torres, Iñigo, Salagre, Elena, Segovia, Pilar, Michel, Enrique G, Assebban, Mhamed, Ares, Pablo, Hernández-Maldonado, David, Ramasse, Quentin, Abellán, Gonzalo, Gómez-Herrero, Julio, Varela, Maria, Palacios, Juan José, Zamora, Félix
Format:	Article en ligne
Langue:	English
Publié:	2021
Accès à la collection:	Advanced materials (Deerfield Beach, Fla.)
Sujets:	Journal Article 2D materials alpha-germanium nanolayers bandgap modulation gram-scale preparation liquid-phase exfoliation

Description
Résumé:	© 2021 Wiley-VCH GmbH. 2D materials have opened a new field in materials science with outstanding scientific and technological impact. A largely explored route for the preparation of 2D materials is the exfoliation of layered crystals with weak forces between their layers. However, its application to covalent crystals remains elusive. Herein, a further step is taken by introducing the exfoliation of germanium, a narrow-bandgap semiconductor presenting a 3D diamond-like structure with strong covalent bonds. Pure α-germanium is exfoliated following a simple one-step procedure assisted by wet ball-milling, allowing gram-scale fabrication of high-quality layers with large lateral dimensions and nanometer thicknesses. The generated flakes are thoroughly characterized by different techniques, giving evidence that the new 2D material exhibits bandgaps that depend on both the crystallographic direction and the number of layers. Besides potential technological applications, this work is also of interest for the search of 2D materials with new properties
Description:	Date Revised 10.03.2021 published: Print-Electronic Citation Status PubMed-not-MEDLINE
ISSN:	1521-4095
DOI:	10.1002/adma.202006826