Article
Materials Science, Multidisciplinary
Xuezhu Sha, Hui Zheng, Baojiu Chen, Jinsu Zhang, Xiangping Li, Sai Xu, Jiashi Sun, Xizhen Zhang, Yongze Cao, Yanqiu Zhang, Xin Wang, Yuhang Zhang, Haiping Xia
Summary: This study synthesized core-shell nanoparticles with both photothermal conversion and temperature detection capabilities, finding that different coatings did not significantly affect their performance. The photothermal conversion capacity increased with higher Yb3+ concentration and 980 nm laser excitation power.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Chemistry, Physical
Qixiao Wu, Zheng Xu, S. Wageh, Ahmed Al-Ghamdi, Suling Zhao
Summary: A series of NaYF4:Yb3+, Tm3+@NaYF4:Yb3+, Er3+ core@shell nanocrystals with different sensitizer contents were synthesized to investigate the impact of sensitizer Yb3+ on upconversion luminescence. The results showed that as the Yb3+ content increased, the green upconversion luminescence decayed faster than the red, and the red to green upconversion luminescence ratio significantly increased in samples highly doped with Yb3+.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Condensed Matter
Yang Yu, Sai Xu, Muhan Jiang, Ruixin Song, Jie Li, Yuefeng Gao, Xizhen Zhang, Xiangping Li, Hongquan Yu, Baojiu Chen
Summary: In this study, upconversion core-shell nanoparticles with dual functions of temperature sensing and photothermal conversion were successfully synthesized using a high-temperature thermal decomposition method. Both the designed core-shell nanoparticles and bare core nanoparticles exhibited similar excellent temperature sensing performances. Furthermore, it was found that the photothermal conversion ability of the core-shell UCNPs was greatly improved by coating with the NaYF4: Sm3+/Yb3+ outer shell.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Chemistry, Multidisciplinary
Mingzhou Meng, Rui Zhang, Xinmeng Fa, Jianghua Yang, Zhenlong Cheng, Anees A. Ansari, Jun Ou, Christian Wurth, Ute Resch-Genger
Summary: NaYF4:Yb3+/Tm3+@NaYF4:Yb3+/Er3+ nanoparticles doped with Tm3+ and Er3+ were prepared by the solvothermal method, resulting in increased fluorescence intensity and simultaneous temperature measurements on multiple thermocouple energy levels.
Article
Nanoscience & Nanotechnology
Mingzhou Meng, Tianmei Zhang, Jiaoyu Wang, Zhenlong Cheng, Yuanli Liu, Xin Qiao, Jian Wen, Ute Resch-Genger, Wen Long, Jun Ou
Summary: The core-shell NaYF4:Yb3+/Tm3+@NaYF4:Yb3+ upconversion nanoparticles were prepared successfully by a solvothermal method and coated with mesoporous silica (mSiO2) to enhance their hydrophilicity. The nanoparticles demonstrated good temperature sensing performance and intense fluorescence emission. They also showed high reliability and accuracy in temperature measurement in phosphate-buffered saline (PBS) solution. This study provides a potential platform for real-time temperature monitoring and thermotherapy of cancer cells.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Hualin Wu, Xianming Zhang, Ying Zhao, Xuefeng Leng, Xinyue Huang, Bangxing Li
Summary: This paper proposes an optical ammonia sensor based on Yb3+, Er3+, Tm3+ co-doped NaYF4 up-conversion material/ phenol red composites. The concentration of ammonia can be measured by detecting the absorption intensity of up-conversion luminescence. The sensor exhibits fast response and recovery time.
Article
Materials Science, Multidisciplinary
Jingxin Ding, Huazhen Liao, Libin Pang, Deping Wang, Song Ye
Summary: This study successfully synthesized core-shell up-conversion nanoparticles and found that they exhibit improved thermal sensitivity compared to core-only structured thermometers. The spectral study showed that the up-conversion luminescence intensity of the core-shell nanoparticles was significantly enhanced. The use of Stark-LIR techniques allowed for the calculation of the relative thermal sensitivity of the core-shell nanoparticles, with CS-4Er@1Gd showing the highest sensitivity.
Article
Nanoscience & Nanotechnology
Schindra Kumar Ray, Bhupendra Joshi, Jin Hur
Summary: In this study, rare earth-doped α-NiMoO4 nanoparticles were successfully synthesized, and white light emission was obtained by tuning the concentrations of different dopant ions. The nanoparticles exhibited white color emission and could be potential candidates for white-light devices.
Article
Chemistry, Multidisciplinary
Uliana Kostiv, Marta Maria Natile, Daniel Jirak, Denisa Pulpanova, Klara Jirakova, Magda Vosmanska, Daniel Horak
Summary: Upconverting nanoparticles with gadolinium enrichment were synthesized and characterized for bimodal imaging purposes. A 2.5 nm NaGdF4 shell grown on the core nanoparticles led to a 26-fold enhancement in emission under excitation, impacting both T-1 and T-2 relaxation times. PEG-Ner modification significantly increased the relaxivities of the nanoparticles, demonstrating their potential as a diagnostic tool for magnetic resonance imaging.
Article
Chemistry, Multidisciplinary
Preeti Verma, Debasish Sarkar, Parasmani Rajput, Manvendra Narayan Singh, Rajendra Sharma, Supratim Giri
Summary: This paper investigates the influence of non-lanthanide dopant insertion on the structural attributes of UC crystals through synchrotron-based X-ray probing, revealing that Li+ doping leads to variations in crystal structures without predictable effects on UCL intensity behavior. The study highlights the existence of local lattice disorder reflected in lattice strain, which correlates with changes in UCL intensity regardless of activator ions, indicating a perturbation of local symmetry field connected with local disorder not always manifested through average structural attributes like lattice parameters.
Article
Chemistry, Multidisciplinary
Tomasz Grzyb, Piotr Kaminski, Dominika Przybylska, Artur Tyminski, F. Sanz-Rodriguez, Patricia Haro Gonzalez
Summary: This study synthesized nanoparticles based on host compound NaYF4 with core@shell structures, utilizing different laser wavelengths for excitation and studying emission properties in detail, demonstrating adjustable up-conversion emission and multifunctionality. The impact of doping ions on the emission of NPs was explored, revealing various absorption and emission processes under different laser excitations.
Article
Instruments & Instrumentation
Jurgis Grube, Jelena Butikova
Summary: This study investigates the temperature dependence of Tm3+ up-conversion luminescence in NaYF4:Tm3+, Yb3+ core-shell nanoparticles. The results show that the intensity of Tm3+ up-conversion luminescence increases significantly at lower temperatures, emitting intense blue and ultraviolet radiation. Measurements of Tm3+ up-conversion luminescence spectra at different temperatures reveal three quenching mechanisms associated with temperature variations.
APPLIED SPECTROSCOPY
(2023)
Article
Chemistry, Physical
Weichang Li, Lili Hu, Wei Chen, Shiyu Sun, Malgorzata Guzik, Georges Boulon
Summary: In this study, beta-NaYF4:Er3+ and beta-NaYF4:Er3+,Tm3+ microcrystals were synthesized using a hydrothermal method. The addition of Tm3+ ions inhibited green up-conversion emissions and enhanced red up-conversion emissions in beta-NaYF4:Er3+. The optimal concentrations of Er3+ and Tm3+ ions were determined to achieve the desired red fluorescence emission under near infrared excitation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Environmental
Zhouze Chen, Yuxing Shi, Jialin Lu, Longwen Cao, Yuan Tian, Lizhuang Chen, Feng Guo, Weilong Shi
Summary: In this study, a new photocatalytic material NYF@ZIS for hydrogen production under near-infrared (NIR) irradiation was developed by coating ZnIn2S4 nanosheets on the surface of NaYF:Yb3+/Tm3+ hexagonal prisms. The results showed that NYF@ZIS exhibited excellent photocatalytic performance and outperformed previously reported NIR-driven photocatalysts.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Physics, Condensed Matter
Wei Zhou, Jian Yang, Xiangliang Jin, Yan Peng, Jun Luo
Summary: A novel strategy for optical thermometers using NaYF4:Gd3+/Yb3+/Er3+/Tm3+ nanorods is reported, which generate thermally enhanced near-infrared upconversion emission. The fluorescence intensity ratio (FIR) between Tm3+ near-infrared emission and Er3+ green emission as a function of temperature is studied. Results show that NaYF4:Gd3+/Yb3+/Er3+/Tm3+ nanorods can be used as high-quality candidates for thermometers with high sensitivity and wide temperature range.
PHYSICA B-CONDENSED MATTER
(2023)