کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1589542 | 1001999 | 2009 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the accuracy of maximum entropy reconstruction of high-resolution Z-contrast STEM images
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: On the accuracy of maximum entropy reconstruction of high-resolution Z-contrast STEM images On the accuracy of maximum entropy reconstruction of high-resolution Z-contrast STEM images](/preview/png/1589542.png)
چکیده انگلیسی
The accuracy of maximum entropy reconstruction of Z-contrast STEM images has been evaluated with the effects of experimental variables and noise taken into account by the means of image simulation. As the specimen contains atom species of greatly different atomic numbers, special attention is given to the reliability of the position and composition of lighter atoms that are determined from Z-contrast images in the presence of heavier atoms. When the noise is moderate (SNR >2.5), the position of atom columns can be measured within an accuracy of 0.03Â nm. With a higher signal-to-noise ratio (SNR >5) the composition of lighter atoms can be resolved reliably from the Z-contrast images. However, when image noise increases, the relative intensity of lighter atoms may deviate from the actual value in the specimen object function.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Micron - Volume 40, Issue 2, February 2009, Pages 247-254
Journal: Micron - Volume 40, Issue 2, February 2009, Pages 247-254
نویسندگان
Xiahan Sang, Kui Du, Mujin Zhuo, Hengqiang Ye,