Article
Materials Science, Ceramics
Aleksandar Ciric, Jovana Perisa, Mina Medic, Sanja Kuzman, Zoran Ristic, Zeljka Antic, Miroslav D. Dramicanin
Summary: The luminescence thermometry based on the intensity ratio of Cr3+ and host emissions in the Cr3+ activated MgTiO3 phosphor powder shows good temperature sensing properties over the 100-350 K range. The powder prepared using sol-gel and molten salt methods has a small crystallite size and exhibits strong temperature-dependent emission spectra. This method demonstrates high sensitivity, temperature resolution, and repeatability for luminescence temperature sensing applications.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Anfei Chen, Hailin Gong, Rongfei Wei, Hai Guo, Fangfang Hu
Summary: Developing transparent glass ceramics (GC) with high stability and good repeatability for optical fiber temperature sensing is significant. In this study, NaGd2F7 nanocrystals (NCs) were successfully produced through self-crystallization, and their dispersion in the glass host was controlled by heat treatment. The enhanced up-conversion intensity and prolonged lifetime of Tm3+ emission demonstrate better crystallization of NaGd2F7 GC. The optical temperature performance of NaGd2F7 GC based on fluorescence intensity ratio was explored, showing high sensitivity and precision, making it a potential material for temperature measurement.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Fengkai Shang, Chunhai Hu, Wei Xu, Xin Zhu, Di Zhao, Wenbin Zhang, Zhiguo Zhang, Wenwu Cao
Summary: Rare earth ions activated nanomaterials show promise for optical thermometry due to their unique photoluminescence characteristics. By utilizing phonon-assisted energy transfer, sensitive temperature measurement has been achieved with maximum relative sensitivities of approximately 2.3% K-1 in specific temperature ranges. Laser-induced heating effect significantly influences measurement sensitivity, but can be enhanced by utilizing square wave laser excitation in physiological temperature region.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
J. Y. Chen, J. Q. Chen, L. J. Li, W. N. Zhang, L. P. Chen, H. Guo
Summary: Due to technological advancements, high-precision optical thermometers have gained significant attention from researchers. In this study, Ca3LiZnV3O12:Sm3+ phosphors with two luminescent centers were synthesized and extensively characterized for their structure, luminescent properties, and energy transfer. The thermochromic behavior of the phosphors was observed through different thermal responses in the emission and excitation spectra of VO43- and Sm3+. A four-mode luminescent thermometry based on fluorescence intensity, fluorescence intensity ratio, Commission Internationale de L'Eclairage coordinates, and excitation intensity ratio was designed, demonstrating excellent temperature sensitivity. The findings suggest that Ca3LiZnV3O12:Sm3+ could be a promising candidate for temperature monitoring applications.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Physics, Applied
Dinesh K. Bommidi, Andrea D. Pickel
Summary: Nitrogen vacancy (NV) centers, commonly used for thermometry, show temperature-dependent excited state lifetimes in individual nanodiamonds, which could lead to new approaches for all-optical temperature measurements. Experimental results demonstrate a significant decrease in excited state lifetimes with increasing temperature, providing potential for high-resolution single-ND temperature sensing.
APPLIED PHYSICS LETTERS
(2021)
Article
Optics
Li He, Jinshu Huang, Zhengce An, Haozhang Huang, Yu Zhao, Kexin Zhong, Bo Zhou
Summary: In this study, we designed a NaYF4:Yb3+/Tm3+@NaYF4 core-shell nanostructure to achieve thermochromic upconversion and high thermal sensitivity. We found that the blue upconversion emission of Tm3+ decreased while the deep-red emission increased with elevating temperature. The sample also showed a gradual emission color change from blue to purplish-red, and the optimal relative sensitivity reached 2.79% K-1.
JOURNAL OF LUMINESCENCE
(2024)
Article
Spectroscopy
Fengya Hu, Dong Zhang, Yongjin Wu, Chengmei Sun, Chengcheng Xu, Qingru Wang, Yanru Xie, Qiang Shi, Shuhong Li, Kai Wang
Summary: Cubic type ZnTiO3 nanophosphors were synthesized and studied for their photoluminescence properties with Eu3+/Mn4+ co-doping and Mn4+ modification. The results showed that the surface modification by transition metals improved the temperature sensing performance of the crystals.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Physics, Multidisciplinary
S. Ernst, P. J. Scheidegger, S. Diesch, L. Lorenzelli, C. L. Degen
Summary: We conducted measurements on the photoluminescence properties of single nitrogen-vacancy centers in diamond at various temperatures. We observed a significant reduction in PL intensity and spin contrast between 10K and 100K, which recovered to high levels at lower and higher temperatures. We also discovered a diverse dependence on magnetic bias field and crystal strain.
PHYSICAL REVIEW LETTERS
(2023)
Article
Optics
Pan Lu, Lin Lin, Zheng Li, Zhuohong Feng, Yuanming Yang, Jieyi Cai, Zhezhe Wang, Zhiqiang Zheng
Summary: Dual-phase compounds consisting of CsPbBr3 perovskite quantum dots and NaYF4:Ho3+ nanoparticles were prepared and characterized for their luminescence properties. The compounds showed different trends in fluorescence intensity at varying temperatures, and were found to have high sensitivity and suitability as temperature sensors based on fluorescence intensity ratios.
Article
Chemistry, Physical
XiuSha Peng, Jing Chen, YiHang Chen, YunCheng Jiang, RongFei Wei, WeiDong Zhou, HuiJun Li, Hai Guo
Summary: An array of Y2Mg2Al2Si2O12:Bi3+,Eu3+ phosphors with high energy transfer efficiency and excellent temperature sensing properties were successfully synthesized in this study. These samples may have important application value in the field of temperature measurement.
JOURNAL OF ALLOYS AND COMPOUNDS
(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
Chemistry, Inorganic & Nuclear
Raul Isaac Lopez-Esquivel, Juan Carlos Guzman-Olguin, Ismael A. Garduno-Wilches, Laura Esther Lopez Ruiz, Teodoro Rivera Montalvo, Jose Guzman-Mendoza
Summary: In this study, we utilized 395 nm ultraviolet radiation to excite the matrix of barium hafnate doped with europium ions, resulting in the development of an optical temperature sensor. Luminescent analysis conducted within the physiological range revealed significant variations in luminescent intensity across all transitions. When the temperature of the material increased from 289.7 to 323.8 K, a relative sensitivity of 1574.3/T^2 was achieved. The 5D0 -> 7F2 transition exhibited the best temperature resolution (1.1 x 102 K).
APPLIED RADIATION AND ISOTOPES
(2023)
Article
Materials Science, Multidisciplinary
Jovana Peris, Vesna Dordevic, Zoran Ristic, Mina Medic, Sanja Kuzman, Zeljka Antic, Miroslav D. Dramicanin
Summary: The potential of Eu3+, Mn4+ co-doped YAG for dual-activated luminescence intensity ratio thermometry is investigated. The samples were prepared and characterized, and the optimal concentrations of Mn4+ and Eu3+ were determined. Sensitivities were calculated using luminescence intensity ratio as the indicator of temperature.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Optics
Haihong Xiao, Qingyu Meng, Changwen Wang
Summary: Eu3+ doped CaWO4 phosphors with different concentrations were synthesized by hydrothermal method. XRD and FE-SEM were employed to investigate the structure and morphology of the samples. The temperature dependent excitation and emission spectra of the phosphors were measured. The results showed that the luminescence of WO42- decreased with temperature increase, while the luminescence of Eu3+ exhibited a novel trend of first rising and then decreasing, which is attributed to the enhancement of energy transfer effect from the matrix to Eu3+. The Eu3+ and WO42- luminescence exhibited markedly different thermal quenching trends, and the relative sensitivity reached a maximum value of 3.25% K-1 at 303 K. The phosphor also exhibited a significant change in luminescence color from blue to orange-red with increasing temperature. Therefore, Eu3+ doped CaWO4 phosphor shows great potential as an optical temperature sensing material.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Physical
Sen Yang, Yinghao Wei, Qi Wang, Zhijun Sun, Ai-Hua Li
Summary: In this study, a high-performance microcrystal based on heavily doped Tm3+ was designed to achieve self-trapped excitons and Tm3+ near-infrared emission. The application of its luminescent properties in temperature sensing was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Fengkai Shang, Chunhai Hu, Wei Xu, Le Zhao, Shuning Zong, Miao Yao, Fengze Bai, Zhiguo Zhang
Summary: Luminescence thermometry using rare earth doped materials has shown promising applications, but achieving sensitive and accurate temperature sensing over a wide range remains a challenge. By utilizing the inverse thermal responses of near-infrared emissions in Nd3+-Yb3+ codoped phosphors and modifying the aluminate host matrix with SiO2, enhanced thermometric capabilities were achieved for temperatures ranging from 303 to 773 K.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Optics
Xiyu Zhang, Feng Qin, Leipeng Li, Ting Liu, Honglin Zhang, Hua Zhao, Zhiguo Zhang
Summary: Utilizing the intensity ratio between the fluorescence and phosphorescence of lutecium hematoporphyrin (Lu-HMME) for optical thermometry, the emission intensity ratio was confirmed to follow the Boltzmann distribution law, making Lu-HMME a candidate for optical high-temperature sensors with high relative sensitivity and good temperature resolution.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Physical
Meng Kou, Feng Qin, Weiming Lv, Xiyu Zhang, Yongda Wang, Hua Zhao, Zhiguo Zhang
Summary: This study proposes a new method to obtain the Stern-Volmer constant (K-SV) by steady fluorescence and finds that the oxygen content can influence the fluorescence intensity through the quenching of the excited triplet state (T-1). The research not only offers a convenient way to achieve K-SV but also advances the field of regulable fluorescence correlation.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Zhaoxin Zhong, Biao Zhang, Ziyi Tian, Jian Ye, Haoqian Zhang, Ye Gao, Qiang Liu, Zhiguo Zhang, Feng Ye
Summary: In this study, high aspect ratio carbon fibers were introduced to inhibit the drying shrinkage and improve the porosity of aqueous gel-cast porous LAS/SiC ceramics.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Xinyu Ai, Zhiguo Zhang
Summary: A quantitative measurement model for sulfate in the temperature range of 298.15-343.15 K based on vacuum ultraviolet absorption spectroscopy was developed to measure SO3 without impurity gas interference in coal-fired power plants. A vacuum ultraviolet absorption spectrum measurement system was established to eliminate oxygen interference. The relationship between vacuum ultraviolet absorption of sulfate and temperature was revealed, and a universal sulfate concentration measurement model was established. The model showed low average relative calculation error for trace sulfate, supporting its measurement.
Article
Materials Science, Ceramics
Biao Zhang, Zhaoxin Zhong, Jiaqi Tang, Jian Ye, Feng Ye, Zhiguo Zhang, Qiang Liu
Summary: In this research, a series of three-dimensional architectures formed by SiC nanowires with different microstructures were fabricated to enhance the low-frequency wave absorption ability. The bamboo-shaped SiC nanowires in the felt increased the permittivity and conductivity loss and produced multiple scattering effects on the incident EM waves. The density of the SiC nanowire felt was as low as 0.022 g/cm3 due to the high porosity of 3D networks, fulfilling the requirements of lightweight and efficient electromagnetic wave absorption.
CERAMICS INTERNATIONAL
(2023)
Article
Physics, Applied
Jiaming Li, Xudong Qi, Kai Li, Ming Lu, Zhaoliang Yu, Duo Wang, Shichong Xu, Enwei Sun, Zhiguo Zhang
Summary: A photoluminescence (PL) method is proposed to characterize the phase transition processes of Li+/Er3+:BaTiO3 (BLET) ferroelectric ceramics using infrared fluorescence intensities. The fluorescence intensities are used to detect the phase transition of BLET ceramics in multiple phase transition regions. The change in fluorescence intensities at the phase transition is attributed to a variation in the radiative transition probability of the I-4(13/2) level. By elucidating the relationship between fluorescence properties and the phase structure, our research contributes to a better understanding of the PL characteristics and phase structure of ferroelectric materials, and further enhances the application potential of PL methods in the detection of ferroelectric phase transition.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Meng Kou, Feng Qin, Yongda Wang, Xiyu Zhang, Zheng Hu, Zhiguo Zhang
Summary: Environmental heavy atoms can enhance the room temperature phosphorescence emissions of Gd-HMME through the external heavy atom effect. In this study, a method is used to separate the external effect from the total effect and to define a quantity that describes the intrinsic nature of the external effect. The phosphorescent transition rate (kP) increases linearly with the environmental Gd3+ concentration, while the slope kappa is independent of Gd3+ concentration and only depends on the type of environmental heavy atoms.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Engineering, Multidisciplinary
Yongda Wang, Feng Qin, Honglin Zhang, Meng Kou, Zhiguo Zhang
Summary: A high-performance oxygen sensor is developed using room temperature phosphorescence. The sensor probe is made of Sol-gel matrix doped with Palladium (II) octaethylporphyrin (PdOEP) and has a sensitivity of 29.23 kPa(-1). The sensor incorporates a dual-channel structure to eliminate excitation source fluctuations and uses a photomultiplier tube equipped photon counter to enhance the signal-to-noise ratio. The detection limit of the system is 0.1 Pa with an indication error of +/- 1.5%.
Article
Optics
Zhiyang Sun, Yongda Wang, Zhiguo Zhang
Summary: The study investigates the impact of port fraction on the radiant flux of an integrating cavity and establishes a theoretical model for light propagation in an arbitrary-shaped cavity. The relationship between port fraction, radiant flux, and diffuse reflectance is derived and experimentally validated in the absence of gas absorption. A method for measuring the diffuse reflectance of the integrating cavity is proposed, which effectively minimizes the influence of light source fluctuations on the measurement.
APPLIED PHYSICS B-LASERS AND OPTICS
(2023)
Article
Optics
Junqi Cui, Wei Xu, Miao Yao, Longjiang Zheng, Chunhai Hu, Zhiguo Zhang, Zhen Sun
Summary: A novel strategy using convolutional neural network for luminescence thermometry is proposed, which can autonomously select and extract multiple temperature-dependent features for regression temperature calculation, fully utilizing the temperature-dependent spectral data. Compared with traditional ratiometric technology and multiple linear regression method, the proposed method exhibits significantly higher accuracy, indicating the potential of deep learning in the field of luminescence thermometry.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Physical
Meng Kou, Feng Qin, Weiming Lu'', Zheng Hu, Zhiguo Zhang
Summary: Modern photodynamic therapy relies on the interaction between photosensitizer and oxygen to produce singlet oxygen. Energy transfer from the triplet excited state of photosensitizer to the excited state of oxygen is well-established, while the transfer from the singlet excited state is believed to be insignificant. However, our study provides evidence of energy transfer between the singlet excited state and oxygen in the production of singlet oxygen. This finding has been verified through fluorescence intensity measurements and ultrafast pump probe experiments.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Engineering, Mechanical
Ye Yuan, Bin Liu, Han Jia, Chi Zhang, Zhiguo Zhang, Suhao Wang, Yuzhen Yang, Xun Wang, Xiaobin Cheng, Zhaoli Yan, Jun Yang
Summary: This article introduces a nondestructive testing method based on honeycomb structure. By analyzing and experimental testing, it is found that there is a special wave propagation gap in the honeycomb structure, which can be used to detect debonding defects. This method detects and locates the debonding defects in the honeycomb structure with high sensitivity and efficiency, and it has great potential to be widely used in field tests.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Materials Science, Ceramics
Wei Xu, Fengze Bai, Longjiang Zheng, Chunhai Hu, Zhiguo Zhang, Yungang Zhang, Zhen Sun
Summary: By doping Ga3+ in garnet-structured phosphors, the upconversion luminescence can be significantly enhanced, leading to color switching in response to temperature change.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Meng Kou, Feng Qin, Yongda Wang, Xiyu Zhang, Zheng Hu, Hua Zhao, Zhiguo Zhang
Summary: In this study, a method was proposed to accurately determine the Stern-Volmer constant (K(SV)) of the photosensitizer by measuring the oxygen-dependent consumption of 1,3-diphenylisobenzofuran. The consumption time (Δ) was introduced as a measurable quantity and obtained from the absorption spectrum with a high signal-to-noise ratio. Experimentally, rose Bengal and metalloporphyrin were used to validate this method, and the K(SV) values obtained were 43(1) kPa(-1) and verified the accuracy of this method.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
