کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8037940 | 1518317 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Visualization of steps and surface reconstructions in Helium Ion Microscopy with atomic precision
ترجمه فارسی عنوان
تجسم مراحل و بازسازی سطح در میکروسکوپ هلیوم یون با دقت اتمی
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کلمات کلیدی
میکروسکوپ هلیوم یون، کانالینگ آلیاژ سطح، کنتراست قدم میکروسکوپ الکترونی کم انرژی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
چکیده انگلیسی
Helium Ion Microscopy is known for its surface sensitivity and high lateral resolution. Here, we present results of a Helium Ion Microscopy based investigation of a surface confined alloy of Ag on Pt(111). Based on a change of the work function of 25 meV across the atomically flat terraces we can distinguish Pt rich from Pt poor areas and visualize the single atomic layer high steps between the terraces. Furthermore, dechanneling contrast has been utilized to measure the periodicity of the hcp/fcc pattern formed in the 2-3 layers thick Ag/Pt alloy film. A periodicity of 6.65 nm along the ã11¯2ã surface direction has been measured. In terms of crystallography a hcp domain is obtained through a lateral displacement of a part of the outermost layer by 1/3 of a nearest neighbor spacing along ã11¯2ã. This periodicity is measured with atomic precision: coincidence between the Ag and the Pt lattices is observed for 23 Ag atoms on 24 Pt atoms. The findings are perfectly in line with results obtained with Low Energy Electron Microscopy and Phase Contrast Atomic Force Microscopy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultramicroscopy - Volume 162, March 2016, Pages 17-24
Journal: Ultramicroscopy - Volume 162, March 2016, Pages 17-24
نویسندگان
Gregor Hlawacek, Maciej Jankowski, Herbert Wormeester, Raoul van Gastel, Harold J.W. Zandvliet, Bene Poelsema,