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Regulating the upconversion luminescence properties of Tm/Yb-codoped ZrScWPO microparticles with a negative thermal expansion effect through thermal stimulation for optical thermometry.
Dalton Trans
March 2024
Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University, 315211 Ningbo, Zhejiang, China.
Tm/Yb-codoped ZrScWPO microparticles were prepared in order to solve the problems of the severe thermal quenching and unsatisfactory thermometric properties of most luminescent materials. The synthesized materials exhibit a rarely observed negative thermal expansion (NTE) effect, which was verified by X-ray diffraction experiments, performed under high temperature conditions. Upon excitation with a 980 nm laser, bright blue upconversion (UC) emissions originating from Tm were observed.
View Article and Find Full Text PDFIntra-cluster energy transfer editing in a dual-emitting system to tap into lifetime thermometry.
Chem Commun (Camb)
November 2023
Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, K1N 6N5, Canada.
The impact of composition control and energy transfer on luminescence thermometry was investigated in a Tb/Eu dual-emitting molecular cluster-aggregate, known as {Ln}. The study of lifetime dynamics sheds new light on how one can take advantage of rational planning to enhance thermometric performance and gaining insights into intriguing optical properties.
View Article and Find Full Text PDFOptical temperature sensing of the non-thermally coupled energy levels (N-TCLs) based on fluorescence intensity ratio (FIR) technologies has excellent temperature sensitivity and signal recognition properties. In this study, a novel strategy is established to enhance the low-temperature sensing properties by controlling photochromic reaction process in NaBiTaO: Er/Yb samples. The maximum relative sensitivity reaches up to 5.
View Article and Find Full Text PDFApplication and comparison of thermistors and fiber optic temperature sensor reference for ILP measurement of magnetic fluids in double cell magnetic hyperthermia.
Heliyon
June 2022
Research Centre for Engineering Sciences, Functional Soft Materials Research Group, University of Pannonia, 10 Egyetem St, H-8200 Veszprém, Hungary.
One of the simplest way to characterize the heating efficiency of magnetic fluids used in hyperthermia treatment is the calorimetric measurement of the specific loss power with direct temperature detection. However, the performance of metallic sensors in an alternating magnetic field is degraded by the self-heating of the probes, and electromagnetic interference can be also significant. In our double cell differential thermometric system these disturbing effects can be compensated.
View Article and Find Full Text PDFUse of subcutaneous transponders to monitor body temperature in laboratory rats.
J Pharmacol Toxicol Methods
March 2022
Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (UBA), Ciudad Universitaria UBA, Pabellón 2, Piso 4, Ciudad de Buenos Aires C1428EGA, Argentina; Instituto IQUIBICEN, Ciudad Universitaria UBA, Pabellón 2, Piso 4, Consejo Nacional de Investigaciones Científicas (CONICET), Ciudad de Buenos Aires C1428EGA, Argentina. Electronic address:
Implantable radiofrequency transponders may be adequate for the characterization of hazardous chemicals targeting body temperature control in experimental animals when colonic probes and automated monitoring systems based on intraperitoneal transmitters are not available, installable or applicable for any reason. In this work, we summarize a series of experiments showing the implantation protocol and utility of rice-grain size transponders to monitor subcutaneous temperature (T) after exposure to pharmacological or toxicological treatments targeting body temperature control in laboratory rats. In addition, to explore the responsiveness of this thermometric system, the influence of physiological activity on T readings was examined by monitoring T after a motor exercise in a RotaRod system.
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