Dual-mode vehicles with simultaneous thermometry and drug release properties based on hollow Y₂O₃:Er,Yb and Y₂O₂SO₄:Er,Yb spheres

Abstract

Hollow Y2O3 and Y2O2SO4 materials doped with Er3+ and Yb3+ can be successfully used for simultaneous luminescence thermometry and drug delivery applications.

Near-infrared optical nanothermometry via upconversion of Ho3+-sensitized nanoparticles

“…The parameters characterizing prepared optical temperature sensors were determined using the ratiometric approach. To describe the properties of the NaYF 4 :Ho 3+ @NaYF 4 sample, the luminescence intensity ratio ( LIR ), which is a ratio of the luminescence intensity from the upper ( I U ) and lower ( I L ) states, was used 4 , 42 , 43 : …”

“…The most important parameter related to temperature-dependent luminescence, especially for the application in optical temperature sensors, is the relative sensitivity ( S R ) of the material to the temperature changes, determined as the rate of LIR changes with the temperature 4 , 43 , 44 : …”

Turning 3D Covalent Organic Frameworks into Luminescent Ratiometric Temperature Sensors

“…Both approaches yield strongly emitting luminescent materials that are suitable for thermometric applications, which are also studied in detail in this work. The 3D COF-based materials proposed here could be potentially used in biological thermometer applications or in combined catalysis-thermometry applications, as shown in some of our earlier work on lanthanide 2D COF hybrid materials and lanthanide MOF nanocomposites. − , The combination of a porous COF material with a luminescent lanthanide emitter (NP or complex) allows one to move toward multifunctional applications, such as the combination of thermometry with drug delivery . It has to be noted that the developed nanocomposite materials allow movement toward different thermometry systems, which are otherwise not attainable when grafting lanthanides onto a COF (such as the presented upconverting system, where the sensitizer and activator need to be in certain proximity to one another).…”

“…[23][24][25]27 The combination of a porous COF material with a luminescent lanthanide emitter (NP or complex) allows one to move toward multifunctional applications, such as the combination of thermometry with drug delivery. 35 It has to be noted that the developed nanocomposite materials allow movement toward different thermometry systems, which are otherwise not attainable when grafting lanthanides onto a COF (such as the presented upconverting system, where the sensitizer and activator need to be in certain proximity to one another). In general, the use of 3D COFs is highly beneficial because of their unique porous features in terms of having an ordered pore structure and their excellent performances compared to 2D frameworks.…”

Exploring the potential of lanthanide-doped oxyfluoride materials for bright green upconversion and their promising applications towards temperature sensing and drug delivery

“…The DE for the aforementioned particles agrees well with the spectroscopically expected value of the energy difference between the 2 H 11/2 and 4 S 3/2 level. 52,53 Relative sensitivity S r , which is independent of the operational principle of the thermometer, represents the relative change of the thermometric parameter per unit temperature change (in %K À1 ) (eqn (2)). 52 This makes it possible to compare various thermometric materials directly and quantitatively.…”