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Samal SK, Kulkarni S, Yadav J, Naidu BS. Er 3+-activated Ba 2V 2O 7 upconversion nanosheets for dual-mode temperature sensing. NANOSCALE 2024; 16:7443-7452. [PMID: 38516872 DOI: 10.1039/d3nr06401h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
So far, there has been substantial research on non-contact luminescence thermometry approaches that rely on luminescence intensity ratio (LIR) technology. However, there is limited availability of phosphors doped with Er3+ ions that exhibit on-par luminescence and high sensitivity. In this work, samples of Ba2V2O7:Er3+ were synthesized using a sol-gel method aided by citric acid. The luminescence properties of these samples, including upconversion and down-shifting, were investigated using both ultraviolet and 980 nm laser stimulation. When subjected to ultraviolet (UV) light, the sample exhibits a distinct broadband emission that appears pale green. This emission is a distinguishing property of the sample and is attributed to the presence of V2O72- ions. Upon being stimulated by a 980 nm laser, the sample exhibits standard green up-conversion Er3+ emission bands. Concurrently, an assessment was conducted on the phosphor's ability to measure temperature by analysing the LIR between the thermally coupled 2H11/2, 4S3/2 energy levels (TCELs) and the non-thermally coupled 2H11/2, 4F9/2 energy levels (NTCELs) of the Er3+ ion. The corresponding highest sensitivity of temperature for TCELs and NTCELs can position Ba2V2O7:Er3+ nanosheets as a capable option for materials utilized in temperature-sensing applications.
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Affiliation(s)
- Satish Kumar Samal
- Energy and Environment Unit, Institute of Nanoscience and Technology (INST), Mohali, Punjab, 140306, India.
| | - Sahana Kulkarni
- Energy and Environment Unit, Institute of Nanoscience and Technology (INST), Mohali, Punjab, 140306, India.
| | - Jyoti Yadav
- Energy and Environment Unit, Institute of Nanoscience and Technology (INST), Mohali, Punjab, 140306, India.
| | - Boddu S Naidu
- Energy and Environment Unit, Institute of Nanoscience and Technology (INST), Mohali, Punjab, 140306, India.
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2
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Kachou I, Saidi K, Ekim U, Dammak M, Çelikbilek Ersundu M, Ersundu AE. Advanced temperature sensing with Er 3+/Yb 3+ co-doped Ba 2GdV 3O 11 phosphors through upconversion luminescence. Dalton Trans 2024; 53:2357-2372. [PMID: 38214574 DOI: 10.1039/d3dt04015a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
Optical thermometry is a non-contact temperature sensing technique with widespread applications. It offers precise measurements without physical contact, making it ideal for situations where contact-based methods are impractical. However, improving the accuracy of optical thermometry remains an ongoing challenge. Herein, enhancing the thermometric properties of luminescent thermometers through novel materials or strategies is crucial for developing more precise sensors. Hence, the present study focuses on the application of four-mode luminescence thermometric techniques in sol-gel synthesized Er3+/Yb3+ co-doped Ba2GdV3O11 phosphors for optical temperature sensing in the temperature range of 298-573 K. The upconversion (UC) luminescence is achieved under excitations of 980 nm or 1550 nm, resulting in bright yellow-green emission in the visible spectral range. Temperature sensing is realized by exploiting the UC emissions of 4S3/2, 2H11/2 and 4F7/2 bands, which represent intensity ratios of thermally coupled levels (TCELs) and non-thermally coupled levels (NTCELs) of Er3+/Yb3+, along with the emission lifetimes at 4S3/2. The relative sensitivity (Sr) values for TCELs exhibit a gradual decrease with rising temperature, reaching a maximum of 1.1% K-1 for 980 nm excitation and 0.86% K-1 for 1550 nm excitation at 298 K. Conversely, for NTCELs, the highest Sr value observed is 0.9% K-1 at 298 K for 1550 nm excitation. Moreover, the emission lifetimes at 4S3/2 yield notably high Sr values of up to 5.0% μs K-1 (at 425 K). Furthermore, the studied phosphors have a sub-degree thermal resolution, making them excellent materials for accurate temperature sensing. Overall, this study provides a promising new direction for the development of more precise and reliable optical thermometry techniques, which could have important implications for a range of scientific and industrial optical temperature sensing applications.
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Affiliation(s)
- Ikhlas Kachou
- Laboratoire de Physique Appliquée, Groupe de Physique des Matériaux Luminescents, Faculté des Sciences de Sfax, Département de Physique, Université de Sfax, BP 1171, Sfax, Tunisia.
| | - Kamel Saidi
- Laboratoire de Physique Appliquée, Groupe de Physique des Matériaux Luminescents, Faculté des Sciences de Sfax, Département de Physique, Université de Sfax, BP 1171, Sfax, Tunisia.
| | - Utku Ekim
- Yildiz Technical University, Faculty of Chemical and Metallurgical Engineering, Department of Metallurgical and Materials Engineering, Glass Research and Development Laboratory, Istanbul, 34220, Turkiye.
| | - Mohamed Dammak
- Laboratoire de Physique Appliquée, Groupe de Physique des Matériaux Luminescents, Faculté des Sciences de Sfax, Département de Physique, Université de Sfax, BP 1171, Sfax, Tunisia.
| | - Miray Çelikbilek Ersundu
- Yildiz Technical University, Faculty of Chemical and Metallurgical Engineering, Department of Metallurgical and Materials Engineering, Glass Research and Development Laboratory, Istanbul, 34220, Turkiye.
| | - Ali Erçin Ersundu
- Yildiz Technical University, Faculty of Chemical and Metallurgical Engineering, Department of Metallurgical and Materials Engineering, Glass Research and Development Laboratory, Istanbul, 34220, Turkiye.
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Hong J, Liu F, Dramićanin MD, Zhou L, Wu M. The Upconversion Luminescence of Ca 3Sc 2Si 3O 12:Yb 3+,Er 3+ and Its Application in Thermometry. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1910. [PMID: 37446426 DOI: 10.3390/nano13131910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 06/14/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023]
Abstract
To develop novel luminescent materials for optical temperature measurement, a series of Yb3+- and Er3+-doped Ca3Sc2Si3O12 (CSS) upconversion (UC) phosphors were synthesized by the sol-gel combustion method. The crystal structure, phase purity, and element distribution of the samples were characterized by powder X-ray diffraction and a transmission electron microscope (TEM). The detailed study of the photoluminescence emission spectra of the samples shows that the addition of Yb3+ can greatly enhance the emission of Er3+ by effective energy transfer. The prepared Yb3+ and Er3+ co-doped CSS phosphors exhibit green emission bands near 522 and 555 nm and red emission bands near 658 nm, which correspond to the 2H11/2→4I15/2, 4S3/2→4I15/2, and 4F9/2→4I15/2 transitions of Er3+, respectively. The temperature-dependent behavior of the CSS:0.2Yb3+,0.02Er3+ sample was carefully studied by the fluorescence intensity ratio (FIR) technique. The results indicate the excellent sensitivity of the sample, with a maximum absolute sensitivity of 0.67% K-1 at 500 K and a relative sensitivity of 1.34% K-1 at 300 K. We demonstrate here that the temperature measurement performance of FIR technology using the CSS:Yb3+,Er3+ phosphor is not inferior to that of infrared thermal imaging thermometers. Therefore, CSS:Yb3+,Er3+ phosphors have great potential applications in the field of optical thermometry.
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Affiliation(s)
- Junyu Hong
- School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
| | - Feilong Liu
- School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China
| | - Miroslav D Dramićanin
- Center of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, PO Box 522, 11001 Belgrade, Serbia
| | - Lei Zhou
- School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
| | - Mingmei Wu
- School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
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4
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Liang Z, Wu J, Cui Y, Sun H, Ning CZ. Self-optimized single-nanowire photoluminescence thermometry. LIGHT, SCIENCE & APPLICATIONS 2023; 12:36. [PMID: 36740693 PMCID: PMC9899784 DOI: 10.1038/s41377-023-01070-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 12/22/2022] [Accepted: 01/02/2023] [Indexed: 06/18/2023]
Abstract
Nanomaterials-based photoluminescence thermometry (PLT) is a new contact-free photonic approach for temperature sensing, important for applications ranging from quantum technology to biomedical imaging and diagnostics. Even though numerous new materials have been explored, great challenges and deficiencies remain that hamper many applications. In contrast to most of the existing approaches that use large ensembles of rare-earth-doped nanomaterials with large volumes and unavoidable inhomogeneity, we demonstrate the ultimate size reduction and simplicity of PLT by using only a single erbium-chloride-silicate (ECS) nanowire. Importantly, we propose and demonstrate a novel strategy that contains a self-optimization or "smart" procedure to automatically identify the best PL intensity ratio for temperature sensing. The automated procedure is used to self-optimize key sensing metrics, such as sensitivity, precision, or resolution to achieve an all-around superior PLT including several record-setting metrics including the first sensitivity exceeding 100% K-1 (~138% K-1), the highest resolution of 0.01 K, and the largest range of sensible temperatures 4-500 K operating completely within 1500-1800 nm (an important biological window). The high-quality ECS nanowire enables the use of well-resolved Stark-sublevels to construct a series of PL intensity ratios for optimization in infrared, allowing the completely Boltzmann-based sensing at cryogenic temperature for the first time. Our single-nanowire PLT and the proposed optimization strategy overcome many existing challenges and could fundamentally impact PL nano-thermometry and related applications such as single-cell thermometry.
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Affiliation(s)
- Zhang Liang
- Department of Electronic Engineering, Tsinghua University, 100084, Beijing, China
- College of Integrated Circuits and Optoelectronic Chips, Shenzhen Technology University, 518118, Shenzhen, Guangdong, China
| | - Jinhua Wu
- Department of Electronic Engineering, Tsinghua University, 100084, Beijing, China
| | - Ying Cui
- Department of Electronic Engineering, Tsinghua University, 100084, Beijing, China
| | - Hao Sun
- Department of Electronic Engineering, Tsinghua University, 100084, Beijing, China
| | - Cun-Zheng Ning
- Department of Electronic Engineering, Tsinghua University, 100084, Beijing, China.
- College of Integrated Circuits and Optoelectronic Chips, Shenzhen Technology University, 518118, Shenzhen, Guangdong, China.
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5
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Prasad M, Rai VK. Simultaneous effects of synthesis temperature and dopants on MgWO 4UC phosphors. Methods Appl Fluoresc 2022; 10. [PMID: 35472670 DOI: 10.1088/2050-6120/ac6ab7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 04/26/2022] [Indexed: 11/11/2022]
Abstract
A sequence of coactivated divalent-metal tungstate Er3+/Yb3+/Mn4+: MgWO4 phosphors have been successfully developed to study the effect of synthesis temperature on the crystal structure, surface morphology, fluorescence, temperature sensing and the dynamics involved in the processes. Upconversion (UC) intensity of the Er3+/Yb3+: MgWO4 phosphors increased by ~ 109 and ~ 778 times on increasing the synthesis temperature from 800 ºC to 1000 ºC and 1200 ºC. UC intensity of the Er3+/Yb3+/Mn4+: MgWO4 phosphors has been significantly improved up to ~ 90 times via charge compensation. The incorporation of Mn4+ in the Er3+/Yb3+ codoped crystal system shifted the UC spectra from sharp green peaks to broadband emission along with amended sensing abilities. The ratiometric techniques of thermally coupled stark sublevels of the Er3+ have been used to achieve a wide temperature range (300 - 623K). The prepared nanophosphors show maximum absolute & relative sensitivities ~ 25.86×10-3 K-1 @453K and ~ 10.39×10-3 K-1 @303 K respectively with an accuracy of ± 0.42K@303K.
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Affiliation(s)
- Manisha Prasad
- IITISM, Department of Physics, Dhanbad, Jharkhand, 826004, INDIA
| | - Vineet Kumar Rai
- Laser and Spectroscopy Laboratory Department of Physics, IITISM, Dhanbad, 826004, Dhanbad, Jharkhand, 826004, INDIA
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6
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Kolesnikov IE, Afanaseva EV, Kurochkin MA, Vaishlia EI, Kalinichev AA, Kolesnikov EY, Lähderanta E. Upconverting NIR-to-NIR LuVO 4:Nd 3+/Yb 3+ Nanophosphors for High-Sensitivity Optical Thermometry. ACS APPLIED MATERIALS & INTERFACES 2022; 14:1757-1764. [PMID: 34978182 DOI: 10.1021/acsami.1c20937] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Accurate contactless thermometry is required in many rapidly developing modern applications such as biomedicine, micro- and nanoelectronics, and integrated optics. Ratiometric luminescence thermal sensing attracts a lot of attention due to its robustness toward systematic errors. Herein, a phonon-assisted upconversion in LuVO4:Nd3+/Yb3+ nanophosphors was successfully applied for temperature measurements within the 323-873 K range via the luminescence intensity ratio technique. Dual-activating samples were obtained by codoping and mixing single-doped nanopowders. The effect of the type of dispersion system and the Yb3+ doping concentration was studied in terms of thermometric performances. The relative thermal sensitivity reached a value of 2.6% K-1, while the best temperature resolution was 0.2 K. The presented findings show the way to enhance the thermometric characteristics of contactless optical sensors.
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Affiliation(s)
- Ilya E Kolesnikov
- St. Petersburg State University, Universitetskaya nab. 7-9, 199034 St. Petersburg, Russia
- LUT University, Skinnarilankatu 34, 53850 Lappeenranta, Finland
| | - Elena V Afanaseva
- Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya str. 29, 195251 St. Petersburg, Russia
| | - Mikhail A Kurochkin
- St. Petersburg State University, Universitetskaya nab. 7-9, 199034 St. Petersburg, Russia
| | - Elena I Vaishlia
- Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya str. 29, 195251 St. Petersburg, Russia
| | - Alexey A Kalinichev
- St. Petersburg State University, Universitetskaya nab. 7-9, 199034 St. Petersburg, Russia
| | - Evgenii Yu Kolesnikov
- Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya str. 29, 195251 St. Petersburg, Russia
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7
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Yang Q, Zhao L, Fang Z, Yang Z, Cao J, Cai Y, Zhou D, Yu X, Qiu J, Xu X. Transparent perovskite glass-ceramics for visual optical thermometry. J RARE EARTH 2021. [DOI: 10.1016/j.jre.2020.05.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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8
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Nexha A, Carvajal JJ, Pujol MC, Díaz F, Aguiló M. Lanthanide doped luminescence nanothermometers in the biological windows: strategies and applications. NANOSCALE 2021; 13:7913-7987. [PMID: 33899861 DOI: 10.1039/d0nr09150b] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The development of lanthanide-doped non-contact luminescent nanothermometers with accuracy, efficiency and fast diagnostic tools attributed to their versatility, stability and narrow emission band profiles has spurred the replacement of conventional contact thermal probes. The application of lanthanide-doped materials as temperature nanosensors, excited by ultraviolet, visible or near infrared light, and the generation of emissions lying in the biological window regions, I-BW (650 nm-950 nm), II-BW (1000 nm-1350 nm), III-BW (1400 nm-2000 nm) and IV-BW (centered at 2200 nm), are notably growing due to the advantages they present, including reduced phototoxicity and photobleaching, better image contrast and deeper penetration depths into biological tissues. Here, the different mechanisms used in lanthanide ion-doped nanomaterials to sense temperature in these biological windows for biomedical and other applications are summarized, focusing on factors that affect their thermal sensitivity, and consequently their temperature resolution. Comparing the thermometric performance of these nanomaterials in each biological window, we identified the strategies that allow boosting of their sensing properties.
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Affiliation(s)
- Albenc Nexha
- Universitat Rovira i Virgili, Departament de Química Física i Inorgànica, Física i Cristal·lografia de Materials i Nanomaterials (FiCMA-FiCNA)-EMaS, Campus Sescelades, E-43007, Tarragona, Spain.
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9
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Xiang G, Xia Q, Liu X, Wang Y, Jiang S, Li L, Zhou X, Ma L, Wang X, Zhang J. Upconversion nanoparticles modified by Cu 2S for photothermal therapy along with real-time optical thermometry. NANOSCALE 2021; 13:7161-7168. [PMID: 33889886 DOI: 10.1039/d0nr09115d] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Highly effective photothermal conversion performance coupled with high resolution temperature detection in real time is urgently needed for photothermal therapy (PTT). Herein, ultra-small Cu2S nanoparticles (NPs) were designed to absorb on the surface of NaScF4: Yb3+/Er3+/Mn2+@NaScF4@SiO2 NPs to form a central-satellite system, in which the Cu2S NPs play the role of providing significant light-to-heat conversion ability and the Er3+ ions in the NaScF4: Yb3+/Er3+/Mn2+ cores act as a thermometric probe based on the fluorescence intensity ratio (FIR) technology operating in the biological windows. A wavelength of 915 nm is used instead of the conventional 980 nm excitation wavelength to eliminate the laser induced overheating effect for the bio-tissues, by which Yb3+ can also be effectively excited. The temperature resolution of the FIR-based optical thermometer is determined to be better than 0.08 K over the biophysical temperature range with a minimal value of 0.06 K at 298 K, perfectly satisfying the requirements of biomedicine. Under the radiation of 915 nm light, the Cu2S NPs exhibit remarkable light-to-heat conversion capacity, which is proved by photothermal ablation testing of E. coli. The results reveal the enormous potential of the present NPs for PTT integrated with real-time temperature sensing with high resolution.
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Affiliation(s)
- Guotao Xiang
- Department of Mathematics and Physics, Chongqing University of Posts and Telecommunications, 2 Chongwen Road, Chongqing 400065, China.
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10
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Nexha A, Pujol MC, Carvajal JJ, Díaz F, Aguiló M. Effect of the Size and Shape of Ho, Tm:KLu(WO 4) 2 Nanoparticles on Their Self-Assessed Photothermal Properties. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:485. [PMID: 33673013 PMCID: PMC7918361 DOI: 10.3390/nano11020485] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 02/02/2021] [Accepted: 02/11/2021] [Indexed: 01/06/2023]
Abstract
The incorporation of oleic acid and oleylamine, acting as organic surfactant coatings for a novel solvothermal synthesis procedure, resulted in the formation of monoclinic KLu(WO4)2 nanocrystals. The formation of this crystalline phase was confirmed structurally from X-ray powder diffraction patterns and Raman vibrational modes, and thermally by differential thermal analysis. The transmission electron microscopy images confirm the nanodimensional size (~12 nm and ~16 nm for microwave-assisted and conventional autoclave solvothermal synthesis) of the particles and no agglomeration, contrary to the traditional modified sol-gel Pechini methodology. Upon doping with holmium (III) and thulium (III) lanthanide ions, these nanocrystals can generate simultaneously photoluminescence and heat, acting as nanothermometers and as photothermal agents in the third biological window, i.e., self-assessed photothermal agents, upon excitation with 808 nm near infrared, lying in the first biological window. The emissions of these nanocrystals, regardless of the solvothermal synthetic methodology applied to synthesize them, are located at 1.45 μm, 1.8 μm and 1.96 μm, attributed to the 3H4 → 3F4 and 3F4 → 3H6 electronic transition of Tm3+ and 5I7 → 5I8 electronic transition of Ho3+, respectively. The self-assessing properties of these nanocrystals are studied as a function of their size and shape and compared to the ones prepared by the modified sol-gel Pechini methodology, revealing that the small nanocrystals obtained by the hydrothermal methods have the ability to generate heat more efficiently, but their capacity to sense temperature is not as good as that of the nanoparticles prepared by the modified sol-gel Pechnini method, revealing that the synthesis method influences the performance of these self-assessed photothermal agents. The self-assessing ability of these nanocrystals in the third biological window is proven via an ex-vivo experiment, achieving thermal knowledge and heat generation at a maximum penetration depth of 2 mm.
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Affiliation(s)
| | | | - Joan Josep Carvajal
- Campus Sescelades, Física i Cristalografia de Materials i Nanomaterials (FiCMA-FiCNA)-EMaS, Departament de Química Física i Inorgànica, Universitat Rovira I Virgili, E-43007 Tarragona, Spain; (A.N.); (M.C.P.); (F.D.); (M.A.)
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11
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Zheng L, Huang X, Zhong J, Wang Z, Cheng X. Upconversion luminescence and temperature sensing properties of NaGd(WO 4) 2:Yb 3+/Er 3+@SiO 2 core-shell nanoparticles. RSC Adv 2021; 11:3981-3989. [PMID: 35424360 PMCID: PMC8694333 DOI: 10.1039/d0ra10039k] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 01/05/2021] [Indexed: 11/23/2022] Open
Abstract
Optical thermometry based on the fluorescence intensity ratio (FIR) of two thermally coupled levels in lanthanide ions has potential application in non-contact optical temperature sensing techniques. In this work, a shell of SiO2 with tunable thickness was uniformly coated on NaGd(WO4)2:Yb3+/Er3+ core upconversion nanoparticles (UCNPs). The effects of the silica shell on UC luminescence and thermal sensing properties of core-shell NaGd(WO4)2:Yb3+/Er3+@SiO2 UCNPs were investigated. Under 980 nm laser excitation, the temperature-dependent UC emission spectra of obtained samples were measured. The FIR was analyzed based on the thermally coupled 2H11/2 and 4S3/2 levels of Er3+ in the biological temperature range of 300-350 K, in which the Boltzmann distribution is applied. The emission from the upper 2H11/2 state within Er3+ was enhanced as temperature increased due to the thermal effect. Absolute sensitivities (S A) and relative sensitivities (S R) of the core and core-shell UCNPs were calculated. It was found that after SiO2 coating, the maximum S A was enhanced by ∼2-fold (1.03% K-1 at 350 K). Especially, S A was as high as 2.14% K-1 at 350 K by analyzing the FIR of the non-thermally coupled 2H11/2 and 4F9/2 levels.
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Affiliation(s)
- Lu Zheng
- School of Materials, Sun Yat-sen University Guangzhou 510275 China
| | - Xinyi Huang
- School of Materials, Sun Yat-sen University Guangzhou 510275 China
| | - Jiuping Zhong
- School of Materials, Sun Yat-sen University Guangzhou 510275 China
| | - Zijun Wang
- Laboratoire de Physique de la Matière Condensée, Ecole Polytechnique, CNRS, IP Paris Palaiseau 91128 France
| | - Xiaoning Cheng
- Instrumental Analysis & Research Center, Sun Yat-sen University Guangzhou 510275 China
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12
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Perrella RV, de Sousa Filho PC. High-sensitivity dual UV/NIR-excited luminescence thermometry by rare earth vanadate nanoparticles. Dalton Trans 2020; 49:911-922. [DOI: 10.1039/c9dt04308j] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
High-crystallinity Ln3+-doped YVO4 nanoparticles combine multiple emissions under dual UV/NIR excitation, promoting high performance self-referenced luminescence thermometry.
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Affiliation(s)
- Rafael Vieira Perrella
- Department of Inorganic Chemistry
- Institute of Chemistry
- University of Campinas (Unicamp)
- São Paulo
- Brazil
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13
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Xiang G, Xia Q, Liu X, Wang X. Optical thermometry based on the thermally coupled energy levels of Er 3+ in upconversion materials. Dalton Trans 2020; 49:17115-17120. [PMID: 33020796 DOI: 10.1039/d0dt03100c] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Contactless thermometry with the requirements of high accuracy and high efficiency is an extremely acute need in many fields. Optical thermometers based on the fluorescence intensity ratio (FIR) of the thermally coupled energy levels of Er3+ have been demonstrated to be excellent candidates to afford that due to their advantages of high spatial resolution, rapid response, anti-jamming capability, etc. In this paper, we summarize the recent developments in optical thermometry based on the FIR of the electronic levels Er3+:2H11/2/4S3/2 and the Stark sublevels of Er3+:4F9/2 and Er3+:4I13/2 manifolds, including physical mechanism, improvement of thermometric sensitivity, biological application and so on. Moreover, the challenges in creating novel Er3+-based optical thermometers and potentially new research directions for future work are discussed in detail. Overall, the Er3+-based optical thermometers have exhibited outstanding advantages for non-contact temperature sensing, but great efforts are still needed to improve their key performance indicators for meeting the demands of practical applications.
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Affiliation(s)
- Guotao Xiang
- Department of Mathematics and Physics, Chongqing University of Posts and Telecommunications, 2 Chongwen Road, Chongqing 400065, China.
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