File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

DingFeng

Ding, Feng
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Silica Particle-Mediated Growth of Single Crystal Graphene Ribbons on Cu(111) Foil

Author(s)
Li, YunqingChoe, MyeonggiJin, SunghwanLuo, DaBakharev, Pavel V.Seong, Won KyungDing, FengLee, ZonghoonRuoff, Rodney S.
Issued Date
2022-06
DOI
10.1002/smll.202202536
URI
https://scholarworks.unist.ac.kr/handle/201301/58641
Fulltext
https://onlinelibrary.wiley.com/doi/10.1002/smll.202202536
Citation
SMALL, v.18, no.24, pp.2202536
Abstract
The authors report the growth of micrometer-long single-crystal graphene ribbons (GRs) (tapered when grown above 900 degrees C, but uniform width when grown in the range 850 degrees C to 900 degrees C) using silica particle seeds on single crystal Cu(111) foil. Tapered graphene ribbons grow strictly along the Cu direction on Cu(111) and polycrystalline copper (Cu) foils. Silica particles on both Cu foils form (semi-)molten Cu-Si-O droplets at growth temperatures, then catalyze nucleation and drive the longitudinal growth of graphene ribbons. Longitudinal growth is likely by a vapor-liquid-solid (VLS) mechanism but edge growth (above 900 degrees C) is due to catalytic activation of ethylene (C2H4) and attachment of C atoms or species ("vapor solid" or VS growth) at the edges. It is found, based on the taper angle of the graphene ribbon, that the taper angle is determined by the growth temperature and the growth rates are independent of the particle size. The activation enthalpy (1.73 +/- 0.03 eV) for longitudinal ribbon growth on Cu(111) from ethylene is lower than that for VS growth at the edges of the GRs (2.78 +/- 0.15 eV) and for graphene island growth (2.85 +/- 0.07 eV) that occurs concurrently.
Publisher
WILEY-V C H VERLAG GMBH
ISSN
1613-6810
Keyword (Author)
activation enthalpychemical vapor depositionCu(111)single-crystal graphene ribbonsvapor-liquid-solid (VLS)
Keyword
LIQUID-SOLID MECHANISMCARBON NANOTUBESNANORIBBONSNANOWIRES

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.