Atom-by-atom nucleation and growth of graphene nanopores.
Proc Natl Acad Sci U S A
; 109(16): 5953-7, 2012 Apr 17.
Article
en En
| MEDLINE
| ID: mdl-22492975
ABSTRACT
Graphene is an ideal thin membrane substrate for creating molecule-scale devices. Here we demonstrate a scalable method for creating extremely small structures in graphene with atomic precision. It consists of inducing defect nucleation centers with energetic ions, followed by edge-selective electron recoil sputtering. As a first application, we create graphene nanopores with radii as small as 3 Å, which corresponds to 10 atoms removed. We observe carbon atom removal from the nanopore edge in situ using an aberration-corrected electron microscope, measure the cross-section for the process, and obtain a mean edge atom displacement energy of 14.1 ± 0.1 eV. This approach does not require focused beams and allows scalable production of single nanopores and arrays of monodisperse nanopores for atomic-scale selectively permeable membranes.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Microscopía Electrónica de Transmisión
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Nanoporos
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Grafito
Idioma:
En
Revista:
Proc Natl Acad Sci U S A
Año:
2012
Tipo del documento:
Article
País de afiliación:
Estados Unidos