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International Journal for Multiscale Computational Engineering

Published 6 issues per year

ISSN Print: 1543-1649

ISSN Online: 1940-4352

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.4 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.3 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 2.2 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00034 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.46 SJR: 0.333 SNIP: 0.606 CiteScore™:: 3.1 H-Index: 31

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DYNAMICS OF NANOSCALE VOID-FIBER ASSEMBLY FOR MATION INIRRADIATED AMORPHOUS MATERIALS

Volume 10, Issue 1, 2012, pp. 109-116
DOI: 10.1615/IntJMultCompEng.2011002152
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ABSTRACT

Ion beam experiments have revealed an intriguingobservation that a nanoscale porous structure containing uniformlysized nanofibers can form spontaneously in preamorphizedgermanium. Depending on the ion energy and ion dose, thenanoporous fiber assembly can either be exposed from the samplesurface or embedded under an intact surface cover. This paperproposes a phase field model that describes the dynamic processfor the formation of such a structure in an amorphous matrix. Inthis model, vacancies in an amorphous matrix are defined by localreduction of atomic density relative to the reference solid beforeirradiation, and the cavity is treated as a phase with the vacancyconcentration close to one. It is shown that interface migrationtogether with the competing actions between vacancy production andannihilation determines the morphology of irradiated material.The model suggests that with continuous supply of vacanciesthrough increasing irradiation doses, the morphology evolves intoa network structure composed of nearly uniform sizes ofnanofibers. The morphology and characteristic wavelengthpredicted by the model are consistent with experimentalobservations. The model also well predicts the effects of ionflux, temperature, and material properties on the uniquenanostructure evolution under irradiation.

REFERENCES
  1. Appleton, B. R., Holland, O. W., Narayan, J., Schow, O. E., Williams, J. S., Short, K. T., and Lawson, E. M., Characterization of damage in ion-implanted Ge. DOI: 10.1063/1.93643

  2. Bray, A. J., Theory of phase-ordering kinetics. DOI: 10.1080/00018739400101505

  3. Cahn, J.W. and Hilliard, J. E., Free energy of a nonuniform system, 1. Interfacial free energy. DOI: 10.1063/1.1744102

  4. Cuerno, R. and Castro, M., Possible origin for the experimental scarcity of KPZ scaling in non-conserved surface growth. DOI: 10.1016/S0378-4371(02)01148-2

  5. Facsko, S., Bobek, T., Stahl, A., and Kurz, H., Dissipative continuum model for self-organized pattern formation during ion-beam erosion. DOI: 10.1103/PhysRevB.69.153412

  6. Gago, R., Vazquez, L., Plantevin, O., Metzger, T. H., Munoz-Garcia, J., Cuerno, R., and Castro, M., Order enhancement and coarsening of self-organized silicon nanodot patterns induced by ion-beam sputtering. DOI: 10.1063/1.2398916

  7. Imada, M., Void Lattice formation—spinodal decomposition of vacancies. DOI: 10.1143/JPSJ.45.1443

  8. Khachaturyan, A. G., Theory of Structural Transformation in Solids.

  9. Kluth, S. M., Gerald, J. D. F., and Ridgway, M. C., Ion-irradiation-induced porosity in GaSb. DOI: 10.1063/1.1896428

  10. Kluth, S. M., Llewellyn, D., and Ridgway, M. C., Irradiation fluence dependent microstructural evolution of porous InSb. DOI: 10.1016/j.nimb.2005.08.182

  11. Lu, W. and Suo, Z., Dynamics of nanoscale pattern formation of an epitaxial monolayer. DOI: 10.1016/S0022-5096(01)00023-0

  12. Lu, W. and Suo, Z., Symmetry breaking in self-assembled monolayers on solid surfaces: anisotropic surface stress. DOI: 10.1103/PhysRevB.65.085401

  13. Munoz-Garcia, J., Castro, M., and Cuerno, R., Nonlinear ripple dynamics on amorphous surfaces patterned by ion beam sputtering. DOI: 10.1103/PhysRevLett.96.086101

  14. Nitta, N. and Taniwaki, M., Development of nano-fabrication technique utilizing self-organizational behavior of point defects induced by ion irradiation. DOI: 10.1016/j.physb.2005.12.218

  15. Nitta, N. and Taniwaki, M., Nano-fabrication utilizing point defects induced by ion-implantation. DOI: 10.1016/j.surfcoat.2006.09.315

  16. Nitta, N., Taniwaki, M., Hayashi, Y., and Yoshiie, T., Cellular structure formed by ion-implantation-induced point defect. DOI: 10.1016/j.physb.2005.12.220

  17. Nitta, N., Taniwaki, M., Hayashi, Y., and Yoshiie, T., Formation of cellular defect structure on GaSb ion-implanted at low temperature. DOI: 10.1063/1.1493662

  18. Olander, D. R., Fundamental aspects of nuclear reactor fuel elements, technical information center, office of public affairs.

  19. Perez-Bergquist, A., Zhu, S., Sun, K., Xiang, X., Zhang, Y., and Wang, L. M., Embedded nanofibers induced by high-energy ion irradiation of bulk GaSb. DOI: 10.1002/smll.200701236

  20. Sizmann, R., Effect of radiation upon diffusion in metals. DOI: 10.1016/0022-3115(78)90256-8

  21. Vinokur, M., An analysis of finite-difference and finite-volume formulations of conservation-laws. DOI: 10.1016/0021-9991(89)90063-6

  22. Wang, L. M. and Birtcher, R. C., Amorphization, morphological instability and crystallization of krypton ion irradiated germanium. DOI: 10.1080/01418619108225344

  23. Wang, L. M. and Birtcher, R. C., Radiation-induced formation of cavities in amorphous-germanium. DOI: 10.1063/1.102009

  24. Yu, H. C. and Lu,W., Dynamics of the self-assembly of nanovoids and nanobubbles in solids. DOI: 10.1016/j.actamat.2004.12.029

CITED BY
  1. Li Kun-Dar, Modeling of feature profile evolution for ion etching, Journal of Applied Physics, 113, 1, 2013. Crossref

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