4.7 Review

An Overview of Modeling Approaches for Compositional Control in III-V Ternary Nanowires

Journal

NANOMATERIALS
Volume 13, Issue 10, Pages -

Publisher

MDPI
DOI: 10.3390/nano13101659

Keywords

III-V ternary nanowires; composition; modeling; vapor-liquid-solid mechanism; growth kinetics

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In this review, the modeling strategies for the growth process of III-V ternary nanowires are discussed and categorized into liquid-solid and vapor-solid approaches. The basic ideas, similarities, differences, and key factors influencing the compositions of III-V nanowires are analyzed. This review provides a foundation for selecting the most appropriate modeling approach for a specific material system and epitaxy technique.
Modeling of the growth process is required for the synthesis of III-V ternary nanowires with controllable composition. Consequently, new theoretical approaches for the description of epitaxial growth and the related chemical composition of III-V ternary nanowires based on group III or group V intermix were recently developed. In this review, we present and discuss existing modeling strategies for the stationary compositions of III-V ternary nanowires and try to systematize and link them in a general perspective. In particular, we divide the existing approaches into models that focus on the liquid-solid incorporation mechanisms in vapor-liquid-solid nanowires (equilibrium, nucleation-limited, and kinetic models treating the growth of solid from liquid) and models that provide the vapor-solid distributions (empirical, transport-limited, reaction-limited, and kinetic models treating the growth of solid from vapor). We describe the basic ideas underlying the existing models and analyze the similarities and differences between them, as well as the limitations and key factors influencing the stationary compositions of III-V nanowires versus the growth method. Overall, this review provides a basis for choosing a modeling approach that is most appropriate for a particular material system and epitaxy technique and that underlines the achieved level of the compositional modeling of III-V ternary nanowires and the remaining gaps that require further studies.

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