Lanthanide-doped Y3Ga5O12 garnets for nanoheating and nanothermometry in the first biological window

Optical Vacuum Sensor Based on Lanthanide Upconversion—Luminescence Thermometry as a Tool for Ultralow Pressure Sensing

“…Thanks to the high absorption cross‐section of Yb 3+ in the NIR range, and the presence of a ladder‐like structure of Ln 3+ energy levels, the upconverting materials codoped with Yb 3+ /Ln 3+ (Ln 3+ = Ho 3+ , Er 3+ , Tm 3+ ) may work not only as temperature sensors, but also as optical “heaters,” as during their irradiation with a high‐power NIR lasers they locally heat up . This is due to the occurrence of various nonradiative processes between the Ln 3+ ions, quenching luminescence of the material and leading to heat generation . Thanks to the efficient light‐to‐heat conversion, the optical heating phenomenon can be utilized in photothermal therapies, thermophotovoltaics, formation of new materials under extreme conditions, etc …”

“…This is due to the occurrence of various nonradiative processes between the Ln 3+ ions, quenching luminescence of the material and leading to heat generation . Thanks to the efficient light‐to‐heat conversion, the optical heating phenomenon can be utilized in photothermal therapies, thermophotovoltaics, formation of new materials under extreme conditions, etc …”

Up-Converting Lanthanide-Doped YAG Nanospheres

“…Furthermore, in last years, garnets with multimodal luminescence have appeared as attractive materials for new display devices and for enhancing the conversion efficiency of next generation solar cells via spectral modification (Mishra et al, 2014) or radiation detectors (Odziornek et al, 2018). Indeed, nanogarnets exhibiting upconversion (UC) photoluminescence (PL) (Wang and Liu, 2009;Haase and Schäfer, 2011) have gained interest for quantum information storage and processing (Kolesov et al, 2012), or biomedical applications, such as nanoheating and nanothermometry in the first biological window (Marciniak et al, 2017;Lozano-Gorrin et al, 2018). However, the studied systems are basically gallium-based garnets with infrared-to-visible light conversion (Pandozzi et al, 2005;Venkatramu et al, 2012;Rathaiah et al, 2015).…”

Enhancing the Relative Sensitivity of V5+, V4+ and V3+ Based Luminescent Thermometer by the Optimization of the Stoichiometry of Y3Al5−xGaxO12 Nanocrystals

“…Due to the fact that the optical properties of such nanoparticles are strongly affected by the temperature, their luminescence may be employed to non-contact temperature sensing (luminescent thermometry, LT). In LT, temperature readout relies on the analysis of thermally-affected spectroscopic parameters like emission intensity, luminescence lifetime, peak position, band shape and polarization anisotropy [14,15,16]. One of the most important advantages of LT in respect to other temperature measurement techniques is the fact that it provides a real-time temperature readout with unprecedented spatial and thermal resolution [15,17,18].…”

“…One of the most important advantages of LT in respect to other temperature measurement techniques is the fact that it provides a real-time temperature readout with unprecedented spatial and thermal resolution [15,17,18]. Additionally, temperature readout is provided in an electrically passive mode what enables to achieve the information about, i.e., the condition of living organisms where even small temperature fluctuations are usually accompanied by serious health diseases and improper cellular biochemical processes [16,19,20,21,22]. The use of the nanosized LTs enables the improvement of the spatial resolution of temperature readout.…”