کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1667078 1008841 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal evolution of the morphology of Ni/Ag/Si(111)-√3 × √3 surface
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Thermal evolution of the morphology of Ni/Ag/Si(111)-√3 × √3 surface
چکیده انگلیسی

The temperature-driven changes in morphology of the interface formed by room temperature (RT) deposition of Ni atoms onto an Ag/Si(111)-√3 × √3 surface were investigated by scanning tunneling microscopy. Roughly 70% of Ni deposition diffused into bulk substrate within the temperature range between RT and 573 K. The images as obtained after annealing up to 670 K correspond to the formation of nano-sized islands of nickel silicides. Two types of islands, large triangular islands typical of the whole range of applied coverage, and smaller islands of different shapes, coexist at Ni coverage higher than 1 monolayer. Annealing above 870 K led to the formation of a 7 × 7 phase in coexistence with small 5 × 5 domains at the expense of a complete disappearance of the √3 × √3 phase. Also, formation of Ni,Si alloy was observed at the temperature, along with segregation of bulk-dissolved Ni species onto the surface.


► We examine changes in morphology of Ni/Ag/Si(111)-√3 × √3 surface upon annealing.
► 70% of deposited Ni atoms diffuse into the bulk after annealing at 570 K.
► A variety of nano-sized Ni, Si islands develops after annealing at 670 K.
► 5 × 5 reconstruction as an evidence for mass transport during the island growth.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 520, Issue 21, 31 August 2012, Pages 6551–6555
نویسندگان
, , , ,