- Prof. Dr. Mark W. Meisel: Persistent Photocontrol of Magnetism above 77 K in Nanoscaled Heterostructures of Cyanometallate Coordination Networks
- 6. 4. 2016, 14:50
- lecture room F2, first floor Ke Karlovu 5
- more information
Abstract:
Using nanometer-sized heterostructures of cyanometallate coordination networks, specifically core@shell nanoparticles of CoFe@CrCr-PBA (PBA = Prussian blue analogues), irradiation by white light at 80 K modifies the magnetic response, and these changes remain intact and persist without continued irradiation to nominally 125 K [1]. The effect arises from thermally induced interface strain, which is relaxed by irradiation of the photactive consituent, CoFe-PBA. The ferrimagnetic domains the CrCr-PBA in the strained interface region are affected and generate the persistent changes of the magnetism in low fields. The road to these discoveries and the present roadblocks to higher temperatures will be overviewed.
[1] O.N. Risset, T.V. Brinzari, M.W. Meisel, D.R. Talham, Chem. Mater. 27 (2015) 6185.