Article
Engineering, Electrical & Electronic
Bo Li, Dayuan Zhang, Christian Brackmann, Lei Han, Zhanyu Feng, Qiang Gao, Zhongshan Li
Summary: Nonintrusive temperature measurement is crucial in combustion research. In this study, a thermometric technique based on femtosecond two-photon laser-induced fluorescence of carbon monoxide (CO-fs-TPLIF) was proposed. The technique allows for simultaneous excitation and detection of dual vibrational bands of CO, enabling assessment of temperature-dependent Boltzmann distribution and extraction of temperature from fluorescence spectra. Two temperature calibration methods were developed.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Chemistry, Physical
Xiao Liu, Siqi Shi, Kai Yang, Liang Chen, Degang Deng, Shiqing Xu
Summary: SrGa2B2O7: Bi3+, Eu3+ phosphors were successfully synthesized through high temperature solid-state method, with their structure, luminescent characteristics and temperature sensing properties studied. The phosphors exhibited high absolute and relative temperature sensitivity, making them a promising optical thermometric material for temperature sensing applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Thermodynamics
Vladimir Dulin, Dmitriy Sharaborin, Roman Tolstoguzov, Aleksei Lobasov, Leonid Chikishev, Dmitriy Markovich, Sirui Wang, Chen Fu, Xunchen Liu, Yuyang Li, Yi Gao
Summary: The present study assesses the effectiveness of single-shot 2D temperature measurements using thermally assisted OH PLIF, finding that the method is most sensitive to temperature changes for the Q(1)(8) transitions. Experimental results show that this approach can effectively detect hot regions in turbulent flames.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Materials Science, Ceramics
Zhaojie Wu, Li Li, Yongjie Wang, Faling Ling, Zhongmin Cao, Sha Jiang, Guotao Xiang, Xianju Zhou, Yongbin Hua, Jae Su Yu
Summary: A dual-mode optical thermometer utilizing a double-perovskite Mn4+/Sm3+ co-doped luminescent material was designed for precise temperature detection. The thermometer achieves accurate temperature measurement and high sensitivity through the fluorescence intensity ratio (FIR) and decay lifetime techniques.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Abbi L. Mullins, Aleksandar Ciric, Ivana Zekovic, J. A. Gareth Williams, Miroslav D. Dramicanin, Ivana Radosavljevic Evans
Summary: A series of La1-xGa0.99O3:Cr-0.01, Nd-x phosphors were synthesized for luminescence thermometry. The compounds feature near infra-red emissions from transition metal and rare earth activator ions, making them attractive for potential in vivo applications. The thermometric analysis showed high sensitivity, excellent temperature resolution, and high stability by monitoring the luminescence intensity ratio between Cr3+ and Nd3+ emissions.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Analytical
Xiazhen Bao, Xuehui Cao, Kaili Ai, Yao Cui, Zhengang Han, Bo Zhou, Congde Huo
Summary: In this study, a dual-reaction-site and dual-channel turn-on fluorescent probe Cyan-S-Nap was developed for selectively detecting GSH. The probe exhibited two independent fluorescent channels in visible and near-infrared regions, allowing precise detection of GSH concentration fluctuations. The probe was also capable of imaging mitochondrial GSH in dual channels and monitoring changes in GSH levels modulated by reactive oxygen species in living cells and zebrafish.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Mechanics
Elliott W. Lewis, Timothy C. W. Lau, Zhiwei Sun, Zeyad T. Alwahabi, Graham J. Nathan
Summary: This study investigates the correlation between local particle volume fraction and temperature in a particle-laden jet with radiative heating. The results show that the particle volume fraction is higher in the hot regions and lower in the cold regions. Additionally, an increase in the local particle volume fraction leads to higher temperatures around individual particles, while the variation in local gas temperature near particles increases with a decrease in particle diameter.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2022)
Article
Optics
Yanting Zhu, Chenxia Li, Degang Deng, Hua Yu, Hao Li, Le Wang, Changyu Shen, Xufeng Jing, Shiqing Xu
Summary: A series of Eu2+/Cr3+ co-doped BaAl12O19 phosphor was synthesized via traditional high temperature solid stated method, with research on its temperature-sensitive characteristic. The phosphor can be used for thermometry based on fluorescence intensity ratio, utilizing the emissions of Eu2+ ion and Cr3+ ion separated well. Its dual-mode optical thermometry has potential application prospects in the field of optical thermometry.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Li Li, Xinji Li, Zhaojie Wu, Yongbin Hua, Xianju Zhou, Yongjie Wang, Zhongmin Cao, Sha Jiang, Guotao Xiang, Jae Su Yu
Summary: In this study, color tunable phosphors of Mn4+ and Tb3+ co-doped double-perovskite SrGdLiTeO6 (SGLT) were successfully synthesized and their crystal parameters and photoluminescence performances were investigated. By adjusting the doping ratio and temperature, the emission color of the phosphors could be tuned, and a wide temperature-range optical thermometry was developed.
DALTON TRANSACTIONS
(2023)
Article
Instruments & Instrumentation
R. Sakuma, Y. Nagai, H. Nakajima, K. -T. Lin, Y. Kajihara
Summary: In this study, a passive LWIR s-SNOM system with two probes was developed to achieve simultaneous near-field measurements at two different positions. This technique can serve as an effective nanoscale analysis tool for local carrier dynamics.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Chemistry, Multidisciplinary
Xiaofeng Wu, Shiping Zhan, Junbo Han, Yunxin Liu
Summary: Lattice self-adaptation is found to remarkably enhance the thermal sensitivity of upconversion nanoparticles by utilizing the thermally sensitive fluorescence intensity ratio of the dopant Er3+ and lattice distortion at the interface. The core/shell upconversion nanoparticles with lattice self-adaptation showed three times higher thermal sensitivity compared to core-only nanoparticles.
Article
Thermodynamics
Iztok Tiselj, Mohit Pramod Sharma, Bostjan Zajec, Nikola Veljanovski, Jan Kren, Leon Cizelj, Blaz Mikuz
Summary: The study investigates the fully developed turbulent flow of water in a square duct using thermography of a heated steel foil on part of the duct wall. Results show that thermal fluctuations around the heated foil provide an accurate description of turbulence, with temperature increments around 5 degrees C above the inlet value. The experiment's simple geometry and fully developed velocity field allow for accurate numerical simulation using Large Eddy Simulation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Damiano Auliano, Manuel Auliano, Erling Naess
Summary: This study investigates the temperature distribution and fluctuations in water forced-convective flow in a heated cavity channel. A new method for validating temperature measurements is proposed. The results show the presence of temperature turbulence intensity peaks within the laminar sublayer, and the position of the minimum point in the temperature distribution shifts with fluid velocity and heat flux. Furthermore, the passive cooling configuration presented in this study exhibits superior heat transfer performance compared to other configurations.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Materials Science, Multidisciplinary
Hongyu Lu, Yang Lu, Jiang Zhu, Jinxin Li, Jiayu Wang, Hua Zou
Summary: How to design a ratiometric thermometer with high sensitivity is a challenging task. In this study, a dual-wavelength excitation method was designed to achieve sensitivity superposition and improve the temperature-sensing performances. The experimental results demonstrate that the dual-wavelength excitation strategy can effectively enhance the sensitivity of Tm3+/Er3+-based thermometer and provide new insights into the design of ratiometric thermometers with high sensitivity.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2023)
Article
Thermodynamics
P. Cingi, A. Cimarelli, D. Angeli
Summary: Under Pr = 0.71 conditions, the transition mechanisms of natural convection flows between two differentially heated vertical plates are investigated. The first bifurcation from laminar conduction regime to steady convection occurs at Ra = 5708, but the subsequent transition to turbulence is highly sensitive to numerical choices. A bifurcation branch leading to chaos via a second bifurcation, Hopf bifurcation, and period-doubling cascade is observed, highlighting the importance of numerical aspects in predicting dynamical behavior and heat transfer rate.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
