A sub-sampled approach to extremely low-dose STEM

作者：Stevens A; Luzi L; Yang H; Kovarik L; Mehdi B L; Liyu A; Gehm M E; Browning N D

来源：Applied Physics Letters, 2018, 112(4): 043104.

DOI：10.1063/1.5016192

<jats:p>The inpainting of deliberately and randomly sub-sampled images offers a potential means to image specimens at a high resolution and under extremely low-dose conditions (≤1 e−/Å2) using a scanning transmission electron microscope. We show that deliberate sub-sampling acquires images at least an order of magnitude faster than conventional low-dose methods for an equivalent electron dose. More importantly, when adaptive sub-sampling is implemented to acquire the images, there is a significant increase in the resolution and sensitivity which accompanies the increase in imaging speed. We demonstrate the potential of this method for beam sensitive materials and in-situ observations by experimentally imaging the node distribution in a metal-organic framework.</jats:p>

• 出版日期2018-1-22