کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5350278 | 1503659 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
FIM tips in SPM: Apex orientation and temperature considerations on atom transfer and diffusion
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: FIM tips in SPM: Apex orientation and temperature considerations on atom transfer and diffusion FIM tips in SPM: Apex orientation and temperature considerations on atom transfer and diffusion](/preview/png/5350278.png)
چکیده انگلیسی
Atoms transferred to W(1Â 1Â 1) and W(1Â 1Â 0) tip apices from the Au(1Â 1Â 1) surface during tunneling and approach to mechanical contact experiments in STM are characterized in FIM at room temperature and at 158Â K. The different activation energies for diffusion on the (1Â 1Â 1) and (1Â 1Â 0) tip planes and the experiment temperature are shown to be important factors controlling the extent of changes to the atomic structure of the tip. W(1Â 1Â 1) tips are much better suited to scanning probe studies which require the characterization of an atomically defined tip and subsequent verification of its integrity in FIM. The statistics of the observed spikes in the tunneling current when the tips are approached to Au(1Â 1Â 1) are interpreted using a simple model of adatoms diffusing through the STM junction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 305, 30 June 2014, Pages 124-132
Journal: Applied Surface Science - Volume 305, 30 June 2014, Pages 124-132
نویسندگان
William Paul, David Oliver, Yoichi Miyahara, Peter Grütter,