Prof. Maarit Karppinen

Aalto University, Finland
Maarit Karppinen received her doctor degree from Helsinki University of Technology in 1993. After assoc. professorship at Tokyo Institute of Technology, Japan, she returned to Finland in 2006 to work as a full professor at Aalto University. In 2017 she was nominated as Aalto Distinguished Professor. She is renowned for her pioneering research on ALD/MLD fabricated inorganic-organic thin films; for this field she has received two European Researcher Council (ERC) Advanced Grants, in 2014 and 2023. Her group’s research covers both the design and synthesis of new materials and their characterization for a variety of functionalities and applications.

Talk title: Novel inorganic-organic materials through ALD/MLD as enablers of next-generation energy and nanotechnology applications
The combined ALD/MLD (atomic/molecular layer deposition) thin-film technique allows us to fabricate novel hybrid materials not readily accessible through any other fabrication route.¹ These include exciting in-situ crystalline metal-organic framework (MOF) materials,² and inorganic-organic interfaces and superlattice structures in which ultra-thin organic layers are introduced periodically between nm-scale metal oxide layers to e.g. enhance mechanical flexibility, provide electrical doping, block phonon conduction, or bring photoactivity. In this presentation, I will briefly discuss exciting examples of properties/functionalities realized for these materials: (i) electroactive lithium-organic thin films for battery components,³ (ii) luminescent lanthanide-organic layers for white-light phosphors and bioimaging,^4-6and (iii) ε-Fe₂O₃:azobenzene superlattice films for flexible and photo-responsive room-temperature magnets.^7,8

References
1.      J. Multia & M. Karppinen, Atomic/molecular layer deposition for designer’s functional metal-organic materials, Adv. Mater. Interfaces 9, 202200210 (2022).
2.      J. Multia, D.E. Kravchenko, V. Rubio-Giménez, A. Philip, R. Ameloot & M. Karppinen, Nanoporous metal-organic framework thin films prepared directly from gaseous precursors by atomic and molecular layer deposition: implications for microelectronics, ACS Appl. Nano Mater. 6, 827 (2023).
3.      J. Multia, J. Heiska, A. Khayyami & M. Karppinen, Electrochemically active in-situ crystalline lithium-organic thin films by ALD/MLD, ACS Appl. Mater. Interfaces 12, 41557 (2020).
4.      A. Ghazy, M. Lastusaari & M. Karppinen, White-light emitting multi-lanthanide terephthalate thin films by atomic/molecular layer deposition, J. Mater. Chem. C 11, 5331 (2023).
5.      A. Ghazy, M. Lastusaari & M. Karppinen, Excitation wavelength engineering through organic linker choice in luminescent atomic/molecular layer deposited lanthanide-organic thin films, Chem. Mater. 35, 5988 (2023).
6.      A. Ghazy, J. Ylönen, N. Subramaniyam & M. Karppinen, Atomic/molecular layer deposition of europium-organic thin films on nanoplasmonic structures towards FRET-based applications, Nanoscale 15, 15865 (2023).
7.      Philip, Y. Zhou, G.C. Tewari, S. van Dijken & M. Karppinen, Optically controlled large-coercivity room-temperature thin-film magnets, J. Mater. Chem. C 10, 294 (2022).
8.      T. Jussila, A. Philip, J. Linden & M. Karppinen, High-quality magnetically hard ε-Fe₂O₃ thin films through atomic layer deposition for room-temperature applications, Adv. Eng. Mater. 25, 2201262 (2023).