The morphology of doubly-clamped graphene nanoribbons

Autor(en)

Christian Brand, Mohammad R A Monazam, Clemens Mangler, Yigal Lilach, Ori Cheshnovsky, Markus Arndt, Jani Kotakoski

Abstrakt

Understanding the response of micro/nano-patterned graphene to mechanical forces is instrumental for applications such as advanced graphene origami and kirigami. Here, we analyze free-standing nanoribbons milled into single-layer graphene by focused ion beam processing. Using transmission electron microscopy, we show that the length L of the structures determines their morphology. Nanoribbons with L below 300 nm remain mainly flat, whereas longer ribbons exhibit uni-axial crumpling or spontaneous scrolling, a trend that is well reproduced by molecular dynamics simulations. We measure the strain of the ribbons as well as their crystallinity by recording nanometer-resolved convergent beam electron diffraction maps, and show that the beam tails of the focused ion beam cause significant amorphization of the structures adjacent to the cuts. The expansive or compressive strain in the structures remains below 4%. Our measurements provide experimental constraints for the stability of free-standing graphene structures with respect to their geometry, providing guidelines for future applications of patterned graphene.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation, Physik Nanostrukturierter Materialien

Externe Organisation(en)

Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), Tel Aviv University

Journal

2D Materials

Band

8

Anzahl der Seiten

7

ISSN

2053-1583

DOI

https://doi.org/10.1088/2053-1583/abe952

Publikationsdatum

04-2021

Peer-reviewed

Ja

ÖFOS 2012

103042 Elektronenmikroskopie, 210004 Nanomaterialien

Schlagwörter

ASJC Scopus Sachgebiete

Condensed Matter Physics, Mechanics of Materials, Mechanical Engineering, Allgemeine Chemie, Allgemeine Materialwissenschaften

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/26a314b3-b71c-4a8d-9990-53acce3de2f1