Abstract: Luminescent nanomaterials doped with lanthanide ions (Ln³⁺) have broad range of applications, e.g. as biomarkers, smart luminescent tracers, light sources, security marks for anti-counterfeiting, optical sensors of pressure and temperature, etc. These various applications are mainly related to the multicolor emission, long-lasting radiative lifetimes, resistance to photobleaching and thermal degradation, as well as ability to formation of stable colloids by the mentioned Ln³⁺ doped nanomaterials.

Alike pressure and temperature are fundamental physical quantities, state functions affecting physicochemical properties of the materials. The conventional methods of their determination require a physical contact with the measured object and/or cannot be used for the exact determination of local pressure/temperature, in the sub-micro sized areas. These issues can be resolved by the use of optical, contactless manometers and thermometers, based on the lanthanide (Ln) doped nanomaterials, i.e. optical nanosensors of pressure and temperature.

Here we show recent advancements in the field of development of luminescent, optical pressure and temperature sensors based on the multi-functional, lanthanide-doped (nano)materials, core/shell type nanostructures, hybrid and composite nanomaterials, including their introduction in the cellulose fibers for anti-counterfeiting purposes[1].This work emphasizes also on combination of different concepts of pressure sensing, and the development of first luminescent pressure sensor working within 9-orders of magnitude (from 10^-4 to 10⁵ bar), allowing alike low (vacuum) and high pressure sensing [2].

Keywords: Nanomaterials, Luminescence, Lanthanides, Optical sensors

References:
[1] M. Runowski, P. Woźny, S. Lis, et al. Adv. Mater. Technol. 5, 1901091 (2020)
[2] M. Runowski, P. Woźny, I. R. Martín, J. Mater. Chem. C. 9, 4643-4651 (2021)

Biography: Marcin Runowski is an associate professor in the Adam Mickiewicz University, Faculty of Chemistry, Department of Rare Earths (Poznań, Poland). His current research interests focus on development of multifunctional lanthanide-doped (nano)materials, and their application as optical (nano)sensors of temperature and low (vacuum) and high pressures, including studies under extreme conditions, using high-resolution and time-resolved laser spectroscopy. He is the author of over 60 publications in the peer-reviewed journals, including one patent and two patent applications