کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1522090 1511815 2014 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Factors to determine the pressure change tendencies in pressure-induced phase transition of semiconductor nanocrystals
ترجمه فارسی عنوان
عوامل تعیین گرایش تغییر فشار در انتقال فاز ناشی از فشار نانوبلورهای نیمه هادی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی


• Size-dependent phase transition pressure for nanocrystals is discussed.
• Variation tendencies of phase transition pressure can be determined.
• Surface energy, surface stress and gram-atom volume are the decisive parameters.
• Individual contributions of surface energy and surface stress are clarified.
• Model predictions agree well with the experimental and theory results.

A critical rule without free parameters to estimate the size-dependent enhancement or reduction of phase transition pressure ΔPe(D) for phase transitions of nanocrystals is established where D denotes the size of nanocrystals. ΔPe(D) function is determined by D, surface energy γ, surface stress f and gram-atom volume Vg of the two transition phases. Also, the individual contributions of γ and f on ΔPe(D) can be separated. Our model predictions agree well with the corresponding experimental and theoretical results. This model is of fundamental significance in understanding the essence of size-dependent pressure induced phase transition and guiding the experimental scientists to estimate their results.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 147, Issues 1–2, 15 September 2014, Pages 95–98
نویسندگان
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