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Scientists at Pacific Northwest National Laboratory are using a fluid stage and scanning transmission electron microscopy (STEM) in an effort to unravel the nucleation and growth mechanisms of different nanostructures. The image is a high-angle annular dark field (HAADF) STEM micrograph of silver nanocrystals formed from an AgNO3 precursor solution inside the microscope. In situ growth of crystals from solution is induced by the electron beam as it scans the sample in the STEM. The image shows detail of the edge of an irradiated area as seen through 600-800nm of liquid using 300kV electrons. Total lateral dimensions are 2.4um X 2.4um. The different morphology of the resultant particles has been color coded. This research has potential impact in understanding the fundamental mechanisms behind the synthesis of nanostructured materials that can lead to improved control of the properties and function of the final system.

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Document Title: High-angle Annular Dark Field (HAADF)
Category: Science as Art
Media Type: Photos
Date of Image/Photo:
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URL of this page: http://picturethis.pnl.gov/picturet.nsf/by+id/DRAE-9N8TCY

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