کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11026627 1666367 2019 24 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural analysis of single nanoparticles in liquid by low-dose STEM nanodiffraction
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Structural analysis of single nanoparticles in liquid by low-dose STEM nanodiffraction
چکیده انگلیسی
Liquid-cell TEM has enabled an interdisciplinary community of scientists to carry out atomic- / nano-scale studies of solid/liquid interfaces. Nevertheless, the restricted resolution of TEM in liquid media and the necessity to reduce the electron dose to avoid harmful radiolytic effects induced by the beam have limited the use of high resolution imaging to study the atomic structure of nanomaterials in liquid. Here we show that STEM nanodiffraction can be exploited in liquid-cell TEM experiments to overcome these two limitations. We evidence that this technique allows quick analysis of the structure of single gold nanoparticles whatever their zone axis orientation, which substantially increases the percentage of analysable nanostructures with respect to HRTEM investigations. Moreover, STEM nanodiffraction can also be used in very low dose conditions. The electron dose irradiating the analyzed nanostructures during data acquisition can be reduced by almost four orders of magnitude compared to conventional HRTEM analysis. Finally, dynamical analyses in reciprocal space are used to provide new insights into the shape-dependent rotation of nanocrystals in the liquid-cell.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Micron - Volume 116, January 2019, Pages 30-35
نویسندگان
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