For this study, the researchers produced the metal halide perovskite CsPbBr3 in the form of nanowires. It is a type of nanomaterial that is often considered in electronics and energy applications. The research team studied the effect of temperature on the structure of the material.
“We started measuring at room temperature, and we could observe structural inhomogeneities within the nanowire. This had not been observed with such high resolution using nano focused X-rays before, so that was already exciting. However, the domains did not have any special pattern,” says Lucas Marçal, post doc at NanoLund. “We gradually increased the temperature, and suddenly, at 80°C, the pattern changed to a highly ordered state.”
Read the article in full on MAX IV:s webpage
Publication (open access)
Lucas A. B. Marçal, Eitan Oksenberg, Dmitry Dzhigaev, Susanna Hammarberg, Amnon Rothman, Alexander Björling, Eva Unger, Anders Mikkelsen, Ernesto Joselevich, and Jesper Wallentin, In Situ Imaging of Ferroelastic Domain Dynamics in CsPbBr3 Perovskite Nanowires by Nanofocused Scanning X-ray Diffraction, ACS Nano 2020, published online October 19, DOI: https://dx.doi.org/10.1021/acsnano.0c07426