Introducing carbon diffusion barriers for uniform, high-quality graphene growth from solid sources.
Nano Lett
; 13(10): 4624-31, 2013 Oct 09.
Article
em En
| MEDLINE
| ID: mdl-24024736
ABSTRACT
Carbon diffusion barriers are introduced as a general and simple method to prevent premature carbon dissolution and thereby to significantly improve graphene formation from the catalytic transformation of solid carbon sources. A thin Al2O3 barrier inserted into an amorphous-C/Ni bilayer stack is demonstrated to enable growth of uniform monolayer graphene at 600 °C with domain sizes exceeding 50 µm, and an average Raman D/G ratio of <0.07. A detailed growth rationale is established via in situ measurements, relevant to solid-state growth of a wide range of layered materials, as well as layer-by-layer control in these systems.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Carbono
/
Nanoestruturas
/
Grafite
Idioma:
En
Revista:
Nano Lett
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Reino Unido