کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8149357 | 1524379 | 2016 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Scenarios of stable VaporâLiquid DropletâSolid Nanowire growth
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
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چکیده انگلیسی
In the process of Nanowire (NW) growth under the VaporâLiquid DropletâSolid (VLS) scheme, the stages that reach the boundary of the crystallization front (the triple phase line (TPL)) under the droplet of the catalyst are either absorbed by the TPL, or accumulate ahead of it. It has been shown that, in the first case, TPL can release stages, which leads to a decrease in supersaturation necessary for NW growth. An equation has been derived, which defines the change in free surface energy of the three-phase system in the absorption (release) of a stage, being a function of the contact angle of the droplet, and the ratio between the phase conjugation angles interface at equilibrium shift in the boundary line. A thermodynamic model has been developed and three possible scenarios for sustainable NW growth: Non-Wetting, Wetting and Fully Wetting have been considered in accordance with the processes occurring at the interface of three phases. The results obtained for each scenario were used to analyze the polytypism of GaAs and InAs NW, the radial periodic instability of Si NW and the formation of “negative” NW.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 450, 15 September 2016, Pages 207-214
Journal: Journal of Crystal Growth - Volume 450, 15 September 2016, Pages 207-214
نویسندگان
Valery A. Nebol׳sin, Alexander I. Dunaev, Alexander F. Tatarenkov, Svetlana S. Shmakova,