Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Atomic-scale electron-beam sculpting of defect-free graphene
  nanostructures   In order to harvest the many promising properties of graphene in (electronic)
applications, a technique is required to cut, shape or sculpt the material on a
nanoscale without damage to its atomic structure, as this drastically
influences the electronic properties of the nanostructure. Here, we reveal a
temperature-dependent self-repair mechanism allowing damage-free atomic-scale
sculpting of graphene using a focused electron beam. We demonstrate that by
sculpting at temperatures above 600 {\deg}C, an intrinsic self-repair mechanism
keeps the graphene single-crystalline during cutting, even thought the electron
beam induces considerable damage. Self-repair is mediated by mobile carbon
ad-atoms constantly repairing the defects caused by the electron beam. Our
technique allows reproducible fabrication and simultaneous imaging of
single-crystalline free-standing nanoribbons, nanotubes, nanopores, and single
carbon chains.

25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph