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Title: Nucleation and growth kinetics for intercalated islands during deposition on layered materials with isolated pointlike surface defects

Abstract

Theory and stochastic lattice-gas modeling is developed for the formation of intercalated metal islands in the gallery between the top layer and the underlying layer at the surface of layered materials. Our model for this process involves deposition of atoms, some fraction of which then enter the gallery through well-separated pointlike defects in the top layer. Subsequently, these atoms diffuse within the subsurface gallery leading to nucleation and growth of intercalated islands nearby the defect point source. For the case of a single point defect, continuum diffusion equation analysis provides insight into the nucleation kinetics. However, complementary tailored lattice-gas modeling produces a more comprehensive and quantitative characterization. We analyze the large spread in nucleation times and positions relative to the defect for the first nucleated island. We also consider the formation of subsequent islands and the evolution of island growth shapes. The shapes reflect in part our natural adoption of a hexagonal close-packed island structure. As a result, motivation and support for the model is provided by scanning tunneling microscopy observations of the formation of intercalated metal islands in highly-ordered pyrolytic graphite at higher temperatures.

Authors:
 [1];  [1];  [2];  [3];  [1];  [1];  [1];  [1];  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States); Xiamen Univ., Xiamen (China)
  3. National Chung Cheng Univ., Chiayi (Taiwan)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1406561
Report Number(s):
IS-J-9466
Journal ID: ISSN 2475-9953; PRMHAR; TRN: US1703265
Grant/Contract Number:  
AC02-07CH11358; 105-2115-M-011-MY2
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Volume: 1; Journal Issue: 5; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Han, Yong, Lii-Rosales, A., Zhou, Y., Wang, C. -J., Kim, M., Tringides, M. C., Wang, C. -Z., Thiel, P. A., and Evans, James W. Nucleation and growth kinetics for intercalated islands during deposition on layered materials with isolated pointlike surface defects. United States: N. p., 2017. Web. doi:10.1103/PhysRevMaterials.1.053403.
Han, Yong, Lii-Rosales, A., Zhou, Y., Wang, C. -J., Kim, M., Tringides, M. C., Wang, C. -Z., Thiel, P. A., & Evans, James W. Nucleation and growth kinetics for intercalated islands during deposition on layered materials with isolated pointlike surface defects. United States. doi:10.1103/PhysRevMaterials.1.053403.
Han, Yong, Lii-Rosales, A., Zhou, Y., Wang, C. -J., Kim, M., Tringides, M. C., Wang, C. -Z., Thiel, P. A., and Evans, James W. Fri . "Nucleation and growth kinetics for intercalated islands during deposition on layered materials with isolated pointlike surface defects". United States. doi:10.1103/PhysRevMaterials.1.053403. https://www.osti.gov/servlets/purl/1406561.
@article{osti_1406561,
title = {Nucleation and growth kinetics for intercalated islands during deposition on layered materials with isolated pointlike surface defects},
author = {Han, Yong and Lii-Rosales, A. and Zhou, Y. and Wang, C. -J. and Kim, M. and Tringides, M. C. and Wang, C. -Z. and Thiel, P. A. and Evans, James W.},
abstractNote = {Theory and stochastic lattice-gas modeling is developed for the formation of intercalated metal islands in the gallery between the top layer and the underlying layer at the surface of layered materials. Our model for this process involves deposition of atoms, some fraction of which then enter the gallery through well-separated pointlike defects in the top layer. Subsequently, these atoms diffuse within the subsurface gallery leading to nucleation and growth of intercalated islands nearby the defect point source. For the case of a single point defect, continuum diffusion equation analysis provides insight into the nucleation kinetics. However, complementary tailored lattice-gas modeling produces a more comprehensive and quantitative characterization. We analyze the large spread in nucleation times and positions relative to the defect for the first nucleated island. We also consider the formation of subsequent islands and the evolution of island growth shapes. The shapes reflect in part our natural adoption of a hexagonal close-packed island structure. As a result, motivation and support for the model is provided by scanning tunneling microscopy observations of the formation of intercalated metal islands in highly-ordered pyrolytic graphite at higher temperatures.},
doi = {10.1103/PhysRevMaterials.1.053403},
journal = {Physical Review Materials},
number = 5,
volume = 1,
place = {United States},
year = {2017},
month = {10}
}

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