کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5397033 | 1505775 | 2007 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural and electronic properties of atomic-size wires at low temperatures
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We have studied structural and electrical behavior of gold nanowires generated by mechanical elongation at liquid nitrogen temperature. Real-time observations using a low temperature sample holder in a high resolution transmission electron microscopy and, an ultra-high-vacuum compatible mechanically controllable break junction modified to cool the sample region have been used. It has been observed that the narrowest region of gold constrictions is crystalline and defect-free at room temperature, but this pattern is quite different at 150Â K. Extended defects (e.g. twins) generate defective nanometer constrictions, indicating a very different structural evolution pattern during stretching. The generation of different atomic arrangements can be also deduced from transport measurements at low temperature. Finally, one-atom-size nanowires seem to be more stable at 150Â K, as revealed by very long conductance plateaus at one quantum of conductance (lasting â¼5-10 times longer than at room temperature).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volumes 156â158, May 2007, Pages 20-24
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volumes 156â158, May 2007, Pages 20-24
نویسندگان
M. Lagos, V. Rodrigues, D. Ugarte,