Wydział Chemii

Marcin Runowski

Andrii Shyichuk

Artur Tymiński

Tomasz Grzyb

Víctor Lavín

Stefan Lis

2018

ACS Applied Materials and Interfaces

10

17269-17279

10.1021/acsami.8b02853

Naukowa

Angielski

Artykuł

Upconversion luminescence of nano-sized Yb³⁺ and Tm³⁺ codoped rare earth phosphates, that is, LaPO₄ and YPO₄, has been investigated under high-pressure (HP, up to ∼25 GPa) and high-temperature (293–773 K) conditions. The pressure-dependent luminescence properties of the nanocrystals, that is, energy red shift of the band centroids, changes of the band ratios, shortening of upconversion lifetimes, and so forth, make the studied nanomaterials suitable for optical pressure sensing in nanomanometry. Furthermore, thanks to the large energy difference (∼1800 cm^–1), the thermalized states of Tm³⁺ ions are spectrally well-separated, providing high-temperature resolution, required in optical nanothermometry. The temperature of the system containing such active nanomaterials can be determined on the basis of the thermally induced changes of the Tm³⁺ band ratio (³F_2,3 → ³H₆/³H₄ → ³H₆), observed in the emission spectra. The advantage of such upconverting optical sensors is the use of near-infrared light, which is highly penetrable for many materials. The investigated nanomanometers/nanothermometers have been successfully applied, as a proof-of-concept of a novel bimodal optical gauge, for the determination of the temperature of the heated system (473 K), which was simultaneously compressed under HP (1.5 and 5 GPa).

energy transfer, lifetimes, Ln3+-doped luminescent nanoparticles, upconversion optical pressure and temperature gauge, nanomaterials’ compression in DAC, rare earth ions

http://dx.doi.org/10.1021/acsami.8b02853

https://www.acs.org/content/acs/en.html