Toward Two-Dimensional All-Carbon Heterostructures via Ion Beam Patterning of Single-Layer Graphene

Autor(en)

Jani Kotakoski, Christian Brand, Yigal Lilach, Ori Cheshnovsky, Clemens Mangler, Markus Arndt, Jannik C. Meyer

Abstrakt

Graphene has many claims to fame: it is the thinnest possible membrane, it has unique electronic and excellent mechanical properties, and it provides the perfect model structure for studying materials science at the atomic level. However, for many practical studies and applications the ordered hexagon arrangement of carbon atoms in graphene is not directly suitable. Here, we show that the atoms can be locally either removed or rearranged into a random pattern of polygons using a focused ion beam (FIB). The atomic structure of the disordered regions is confirmed with atomic-resolution scanning transmission electron microscopy images. These structural modifications can be made on macroscopic scales with a spatial resolution determined only by the size of the ion beam. With just one processing step, three types of structures can be defined within a graphene layer: chemically inert graphene, chemically active amorphous 2D carbon, and empty areas. This, along with the changes in properties, gives promise that FIB patterning of graphene will open the way for creating all-carbon heterostructures to be used in fields ranging from nanoelectronics and chemical sensing to composite materials.

Organisation(en)

Physik Nanostrukturierter Materialien, Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Tel Aviv University

Journal

Nano Letters: a journal dedicated to nanoscience and nanotechnology

Band

15

Seiten

5944-5949

Anzahl der Seiten

6

ISSN

1530-6984

DOI

https://doi.org/10.1021/acs.nanolett.5b02063

Publikationsdatum

09-2015

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik, 210004 Nanomaterialien

Schlagwörter

ASJC Scopus Sachgebiete

Condensed Matter Physics, Mechanical Engineering, Bioengineering, Allgemeine Chemie, Allgemeine Materialwissenschaften

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/7b52b959-8576-4fcc-81ee-4ff5a50888bc