TY - JOUR
T1 - Phase-field modelling of 2D island growth morphology in chemical vapor deposition
AU - Fashu, Simbarashe
AU - Yang, Jing
AU - Yang, Laishan
AU - Wang, Nan
N1 - Publisher Copyright:
© 2020, EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2020/9/1
Y1 - 2020/9/1
N2 - Abstract.: The rich island morphology of two-dimensional (2D) materials during chemical vapor deposition (CVD) growth process is studied using a computational model based on a Burton-Cabrera-Frank (BCF) type crystal growth theory. A previously formulated phase-field (PF) model for the BCF crystal growth process is employed to investigate the effect of various growth conditions, such as the concentration of absorbed atoms on the substrate and the growth temperature, that have been experimentally known to significantly impact the island morphology. It is shown that, within this simple model, the rich morphology of 2D islands in CVD growth can be well reproduced. With increasing substrate temperature, the 2D island changes from dendritic to compact shape. When considering the energy difference between the zigzag and the armchair edges of the 2D island, most commonly known morphologies, from quasi-sixfold compact islands to spiky triangular and compact triangular shapes, are observed in the model. Growth mechanisms associated with different island shapes and potential model improvements are also discussed. Graphical abstract: [Figure not available: see fulltext.].
AB - Abstract.: The rich island morphology of two-dimensional (2D) materials during chemical vapor deposition (CVD) growth process is studied using a computational model based on a Burton-Cabrera-Frank (BCF) type crystal growth theory. A previously formulated phase-field (PF) model for the BCF crystal growth process is employed to investigate the effect of various growth conditions, such as the concentration of absorbed atoms on the substrate and the growth temperature, that have been experimentally known to significantly impact the island morphology. It is shown that, within this simple model, the rich morphology of 2D islands in CVD growth can be well reproduced. With increasing substrate temperature, the 2D island changes from dendritic to compact shape. When considering the energy difference between the zigzag and the armchair edges of the 2D island, most commonly known morphologies, from quasi-sixfold compact islands to spiky triangular and compact triangular shapes, are observed in the model. Growth mechanisms associated with different island shapes and potential model improvements are also discussed. Graphical abstract: [Figure not available: see fulltext.].
KW - Topical issue: Branching Dynamics at the Mesoscopic Scale
UR - http://www.scopus.com/inward/record.url?scp=85090872754&partnerID=8YFLogxK
U2 - 10.1140/epje/i2020-11981-8
DO - 10.1140/epje/i2020-11981-8
M3 - 文章
C2 - 32920678
AN - SCOPUS:85090872754
SN - 1292-8941
VL - 43
JO - European Physical Journal E
JF - European Physical Journal E
IS - 9
M1 - 57
ER -