Seminarium Fizyki Ciała Stałego

sala 0.06, ul. Pasteura 5
2023-06-02 (10:15) Calendar icon
dr hab. Switlana Stelmach (Institute of High Pressure Physics Polish Academy of Sciences, Warsaw)

“Atomic structure of nanocrystals - diffraction studies assisted by molecular dynamics"

The tools commonly used in crystallography for diffractometric studies of crystalline materials are of limited use for studying the atomic structure of nanomaterials. Due to the large fraction of atoms located at the surface a nanocrystal must not be considered as a small single crystal. The need for a new method of structural studies of nanocrystalline materials, and creation of a sub-section of Crystallography named Nano-Crystallography is presented and justified. The essence of the new methodology is the identification of the surface and non-uniform bulk structure of nanoparticles based on experimentally measured atomic Pair Distribution Function.
Using experimental large Q diffraction data and molecular dynamics simulations the shape, the surface structure and lattice deformation in the interior of nano-size grains were identified and quantitatively described. Examples of results on CdSe quantum dots, diamond and SiC nano-crystals will be presented.

Uwaga
Seminarium w trybie Hybrydowym
Faculty of Physics room 0.06
link to remote mode:
https://zoom.us/j/7218838148
szczegóły patrz instrukcja :
instrukcja: (pdf file)

Attention
The seminar in the Hybrid mode
Faculty of Physics room 0.06
for details see instruction :
instruction: (pdf file)

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