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A full 3D morphological and compositional characterization of nanoparticles is necessary to understand their property-structure relationships. While conventional electron microscopy makes it possible to ‘see’ even the smallest nanoparticles, it only yields a 2D projection image. However with the advances in particle synthesis leading to highly anisotropic nano-shapes, 2D projections are not enough. This problem has been solved by electron tomography, a technique in which a series of many 2D projection images at different tilt angles is taken to obtain the 3D object.
In this DENSsolutions Nanotalk, Dr. Wiebke Albrecht will present her approach to fast electron tomography using our specialized DENSsolutions heating tomography holder. She will show how she was able to decrease the time taken to acquire a tomography series by a factor of 10. She will also display recent results on nanoparticle transformations obtained by combining in situ tools with fast electron tomography. In this manner, she was able to visualize and quantify 3D nanoscale diffusion in metal nanoparticles. Specifically, she will show examples of surface diffusion of Au nanostars and AuPd octopods as well as elemental diffusion in Ag@Au nanoparticles of various shapes.
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Advanced in situ TEM solutions for heating, biasing, gas and liquid experiments. Stimulate your sample and start capturing dynamics today.
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