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Iordanova R, Gancheva M, Koseva I, Tzvetkov P, Ivanov P. The Influence of High-Energy Milling on the Phase Formation, Structural, and Photoluminescent Properties of CaWO 4 Nanoparticles. MATERIALS (BASEL, SWITZERLAND) 2024; 17:3724. [PMID: 39124385 PMCID: PMC11313661 DOI: 10.3390/ma17153724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2024] [Revised: 07/15/2024] [Accepted: 07/19/2024] [Indexed: 08/12/2024]
Abstract
CaWO4 nanoparticles were obtained by facile mechanochemical synthesis at room temperature, applying two different milling speeds. Additionally, a solid-state reaction was employed to assess the phase composition, structural, and optical characteristics of CaWO4. The samples were analyzed by X-ray diffraction (XRD), transition electron microscopy (TEM), and Raman, infrared (IR), ultraviolet-visible (UV-Vis) reflectance, and photoluminescence (PL) spectroscopies. The phase formation of CaWO4 was achieved after 1 and 5 h of applied milling speeds of 850 and 500 rpm, respectively. CaWO4 was also obtained after heat treatment at 900 °C for 12 h. TEM and X-ray analyses were used to calculate the average crystallite and grain size. The Raman and infrared spectroscopies revealed the main vibrations of the WO4 groups and indicated that more distorted structural units were formed when the compound was synthesized by the solid-state method. The calculated value of the optical band gap of CaWO4 significantly increased from 2.67 eV to 4.53 eV at lower and higher milling speeds, respectively. The determined optical band gap of CaWO4, prepared by a solid-state reaction, was 5.36 eV. Blue emission at 425 (422) nm was observed for all samples under an excitation wavelength of 230 nm. CaWO4 synthesized by the solid-state method had the highest emission intensity. It was established that the intensity of the PL peak depended on two factors: the morphology of the particles and the crystallite sizes. The calculated color coordinates of the CaWO4 samples were located in the blue region of the CIE diagram. This work demonstrates that materials with optical properties can be obtained simply and affordably using the mechanochemical method.
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Affiliation(s)
- Reni Iordanova
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev, Str. Bld. 11, 1113 Sofia, Bulgaria (I.K.); (P.T.)
| | - Maria Gancheva
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev, Str. Bld. 11, 1113 Sofia, Bulgaria (I.K.); (P.T.)
| | - Iovka Koseva
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev, Str. Bld. 11, 1113 Sofia, Bulgaria (I.K.); (P.T.)
| | - Peter Tzvetkov
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev, Str. Bld. 11, 1113 Sofia, Bulgaria (I.K.); (P.T.)
| | - Petar Ivanov
- Institute of Optical Materials and Technologies “Acad. Jordan Malinowski”, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria;
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2
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Petrulenas A, Mackonis P, Rodin AM. Signal-to-idler energy conversion from 1.9 to 2.3 µm by transient stimulated Raman chirped-pulse amplification. OPTICS LETTERS 2023; 48:1598-1601. [PMID: 37221719 DOI: 10.1364/ol.481811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 03/08/2023] [Indexed: 05/25/2023]
Abstract
The combination of optical parametric and transient stimulated Raman amplification of chirped pulses demonstrates a new approach for idler energy buildup in the short-wave (SW)IR range. Optical parametric chirped-pulse amplification (OPCPA) output pulses in the wavelength range from ∼1800 nm to ∼2000 nm for the signal and from ∼2100 nm to ∼2400 nm for the idler were used as pump and Stokes seed, respectively, in a stimulated Raman amplifier based on a KGd(WO4)2 crystal. Both OPCPA and its supercontinuum seed were pumped with ∼1.2-ps transform-limited pulses from a Yb:YAG chirped-pulse amplifier. The transient stimulated Raman chirped-pulse amplifier provides a 33% increase in idler energy with nearly transform-limited ∼53-fs pulses after compression.
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3
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Guo F, Yu P, Gao Z, Wang Z, Tao X. Spontaneous Raman spectra analysis and efficient nanosecond pulse Raman laser of a BaTeW 2O 9 crystal. OPTICS LETTERS 2022; 47:4624-4627. [PMID: 36107048 DOI: 10.1364/ol.470067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 08/16/2022] [Indexed: 06/15/2023]
Abstract
In this Letter, the spontaneous Raman spectra of a novel, to the best of our knowledge, crystal α-BaTeW2O9 (α-BTW) are characterized and analyzed. The relative Raman gain coefficient of the α-BTW crystal is calculated to be 0.84 times that of YVO4. With a 35-mm-long crystal, the first-order Raman laser of α-BTW operating at 1178 nm is realized. The simple external resonator setup is employed in the first-order Raman laser of α-BTW. The pump source is a lamp-pumped electric-optical Q switched Nd:YAG laser amplifier system operating at 1064 nm with a pulse width of 10 ns. The Raman laser exhibits a threshold of 14.7 MW/cm2. In our experiments, a maximum pulse energy of 21.5 mJ is obtained with an optical-to-optical conversion efficiency and slope efficiency of 43.6%, 57.9%, respectively. Due to its high laser damage threshold, relative high Raman gain coefficient, and excellent thermal properties, the α-BTW crystal is a potential Raman material.
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Stimulated Raman Scattering in Pb(MoO4)1−x(WO4)x with x = 0, 0.5, 0.8 and 1.0 with Combined Frequency Shifts on High- and Low-Frequency Raman Modes under Synchronous Picosecond Laser Pumping. CRYSTALS 2022. [DOI: 10.3390/cryst12020148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Comparative characteristics of spontaneous and stimulated Raman scattering in Pb(MoO4)1−x(WO4)x single crystals (x = 0, 0.5, 0.8, and 1.0) including both the high (ν1) and low (ν2) frequency internal anionic group vibrations have been investigated. It was found that among these crystals, Pb(MoO4)0.2(WO4)0.8 is the most suitable for multi-wavelength Raman laser in several Raman modes simultaneously. This is caused by the optimal relative Mo/W content corresponding to the most efficient coherent combination of the (MoO4)2− and (WO4)2− vibrations enhancing the output radiation characteristics of the synchronously pumped Pb(MoO4)0.2(WO4)0.8 Raman laser. Oscillation of up to twelve, closely spaced SRS components in a range of 1128–1360 nm and the strongest pulse shortening down to 1.16 ps in comparison with not only PbMoO4 and PbWO4 but also with all the earlier investigated nominally pure scheelite-like tungstate and molybdate crystals has been achieved.
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Nishigata Y, Sasaki S, Miyamoto K, Omatsu T. Cascaded vector vortex mode generation from a solid-state Raman laser. APPLIED OPTICS 2021; 60:10638-10642. [PMID: 35200927 DOI: 10.1364/ao.443596] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 11/01/2021] [Indexed: 06/14/2023]
Abstract
Cascaded vector vortex mode generation from a Ba(NO3)2 Raman laser cavity pumped by a vector LG0,2 green laser was demonstrated for the first time to our knowledge. The generated Stokes outputs exhibited a second-order vector vortex beam as evidenced by linearly polarized flower-shaped spatial forms with four petals. The achieved optical conversion efficiencies of the first, second, and third Stokes outputs were 6.59%, 4.22%, and 0.11%, respectively, at a maximum pump energy of 3.6 mJ (360 mW).
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Zhao Y, Wang X, Hu R, Li Y. Linear red/green ratiometric thermometry of Ho 3+/Cr 3+ co-doped red up-conversion tungstate materials. Dalton Trans 2021; 50:15821-15830. [PMID: 34708846 DOI: 10.1039/d1dt03211a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Existing optical thermometers are faced with the challenges of high sensitivity limited to a very narrow high temperature range, while also lacking low temperature sensing performance. A new linear up-conversion (UC) optical thermometer with high sensitivity over a wide temperature range was reported here. The introduction of Cr3+ optimized the red-green (R/G) ratio and improved the temperature sensing characteristics of Ho3+-doped tungstate materials. Notably, as a temperature-related parameter, the R/G emission intensity ratio of Ho3+/Cr3+ co-doped tungstate material fitted well linearly with temperature. The slope of the fitted line corresponded to the absolute sensitivity value; that is, the sensitivity was constantly 0.0217 K-1 over the wide range of 163-663 K. This new UC temperature sensor with high sensitivity extended a new field of optical temperature measurement and demonstrated the possibility of applying this linear sensitivity effect in sensing applications. Most importantly, from an optical temperature sensing point of view, this study provided a novel and effective strategy for linear optical temperature measurement.
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Affiliation(s)
- Yan Zhao
- Key Laboratory of Advanced Civil Engineering Materials of the Ministry of Education, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, 4800 Cao'an Road, Shanghai 201804, China.
| | - Xusheng Wang
- Key Laboratory of Advanced Civil Engineering Materials of the Ministry of Education, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, 4800 Cao'an Road, Shanghai 201804, China.
| | - Rui Hu
- Key Laboratory of Advanced Civil Engineering Materials of the Ministry of Education, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, 4800 Cao'an Road, Shanghai 201804, China. .,The Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yanxia Li
- Key Laboratory of Advanced Civil Engineering Materials of the Ministry of Education, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, 4800 Cao'an Road, Shanghai 201804, China.
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Abstract
In the past few decades, the multifunctional optical crystals for all-solid-state Raman lasers have been widely studied by many scholars due to their compactness, convenience and excellent performance. In this review, we briefly show two kinds of multifunctional Raman crystals: self-Raman (laser and Raman effects) crystals and self-frequency-doubled Raman (frequency-doubling and Raman effects) crystals. We firstly introduce the properties of the self-Raman laser crystals, including vanadate, tungstate, molybdate and silicate doped with rare earth ions, as well as self-frequency-doubled Raman crystals, including KTiOAsO4 (KTA) and BaTeMo2O9 (BTM). Additionally, the domestic and international progress in research on multifunctional Raman crystals is summarized in the continuous wave, passively Q-switched, actively Q-switched and mode-locked regimes. Finally, we present the bottleneck in multifunctional Raman crystals and the outlook for future development. Through this review, we contribute to a general understanding of multifunctional Raman crystals.
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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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9
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Chen J, Dong L, Liu F, Xu H, Liu J. Investigation of Yb:CaWO 4 as a potential new self-Raman laser crystal. CrystEngComm 2021. [DOI: 10.1039/d0ce01538e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
High-quality Yb:CaWO4 crystal was grown using the Czochralski method; laser action and self-Raman conversion were demonstrated.
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Affiliation(s)
- Junxian Chen
- College of Physics
- Qingdao University
- Qingdao 266071
- China
| | - Liang Dong
- College of Physics
- Qingdao University
- Qingdao 266071
- China
| | - Fenfen Liu
- College of Physics
- Qingdao University
- Qingdao 266071
- China
| | - Honghao Xu
- College of Physics
- Qingdao University
- Qingdao 266071
- China
| | - Junhai Liu
- College of Physics
- Qingdao University
- Qingdao 266071
- China
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10
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Mackonis P, Petrulenas A, Rodin AM, Girdauskas V, Michailovas A. Two-stage transient stimulated Raman chirped-pulse amplification in KGd(WO 4) 2 with compression to 145 fs. OPTICS LETTERS 2020; 45:6627-6630. [PMID: 33325855 DOI: 10.1364/ol.408478] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 10/20/2020] [Indexed: 06/12/2023]
Abstract
We report efficient amplification of chirped supercontinuum pulses in a two-stage stimulated Raman amplifier based on double tungstate [KGd(WO4)2] crystals, pumped with 1.2 ps transform-limited pulses at a 1030 nm wavelength. The second stage demonstrates a conversion efficiency of 55% with an output pulse energy of 0.6 mJ at a 1135 nm wavelength. The amplified Stokes bandwidth is 10 times the pump bandwidth, providing 145 fs pulses after compression.
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11
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Zharikov EV, Subbotin KA, Titov AI, Lis DA, Voronov VV, Senin VG, Dudnikova VB. Growth and the Actual Compositions of Cation-Deficient Sodium-Gadolinium Molybdate Single Crystals. CRYSTAL RESEARCH AND TECHNOLOGY 2020. [DOI: 10.1002/crat.201900238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Evgeny V. Zharikov
- Prokhorov General Physics Institute of the Russian Academy of Sciences; 38 Vavilov st. Moscow 119991 Russia
| | - Kirill A. Subbotin
- Prokhorov General Physics Institute of the Russian Academy of Sciences; 38 Vavilov st. Moscow 119991 Russia
- University of Chemical Technology of Russia; 9 Miusskaya sq. Moscow 125047 Russia
| | - Anatoly I. Titov
- Prokhorov General Physics Institute of the Russian Academy of Sciences; 38 Vavilov st. Moscow 119991 Russia
- University of Chemical Technology of Russia; 9 Miusskaya sq. Moscow 125047 Russia
| | - Denis A. Lis
- Prokhorov General Physics Institute of the Russian Academy of Sciences; 38 Vavilov st. Moscow 119991 Russia
| | - Valery V. Voronov
- Prokhorov General Physics Institute of the Russian Academy of Sciences; 38 Vavilov st. Moscow 119991 Russia
| | - Valery G. Senin
- Vernadskii Institute of Geochemistry and Analytical Chemistry of Russian Academy of Sciences; 19, Kosygina st. Moscow 119991 Russia
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12
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Subbotin KA, Titov AI, Lis DA, Senin VG, Dudnikova VB, Zharikov EV. Growth, Compositions, and Mechanical Characteristics of Sodium–Gadolinium Molybdate Single Crystals. CRYSTALLOGR REP+ 2020. [DOI: 10.1134/s106377452002025x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Adusumalli VKB, Runowski M, Lis S. 3,5-Dihydroxy Benzoic Acid-Capped CaF 2:Tb 3+ Nanocrystals as Luminescent Probes for the WO 4 2- Ion in Aqueous Solution. ACS OMEGA 2020; 5:4568-4575. [PMID: 32175503 PMCID: PMC7066553 DOI: 10.1021/acsomega.9b03956] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 02/18/2020] [Indexed: 06/10/2023]
Abstract
We report a facile and effective luminescence method for the determination of the WO4 2- ion in aqueous medium at initial pH = 6.3. This is achieved using 3,5-dihydroxybenzoic acid-capped CaF2:Tb3+ (5%) nanocrystals (NCs) as a luminescent probe. This is accomplished based on the energy transfer luminescence from the WO4 2- ion to the Tb3+ ion in small-size CaF2:Tb3+ NCs. Hydroxyl groups on the surface ligand helps in binding the tungstate ion to the surface of the NCs. With the gradual addition of the WO4 2- ion, the intensity of the Tb3+ excitation and emission spectra significantly increased. The linear range of the detection was from 1 to 10 μM for the WO4 2- ion (R 2 = 0.99). The calculated detection limit was 0.4 μM (by applying the 3σ/K criterion).
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Affiliation(s)
- Venkata
N. K. B. Adusumalli
- Department of Rare Earths, Faculty
of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego
8, 61-614 Poznań, Poland
| | - Marcin Runowski
- Department of Rare Earths, Faculty
of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego
8, 61-614 Poznań, Poland
| | - Stefan Lis
- Department of Rare Earths, Faculty
of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego
8, 61-614 Poznań, Poland
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Chang M, Wang M, Shu M, Zhao Y, Ding B, Huang S, Hou Z, Han G, Lin J. Enhanced photoconversion performance of NdVO 4/Au nanocrystals for photothermal/photoacoustic imaging guided and near infrared light-triggered anticancer phototherapy. Acta Biomater 2019; 99:295-306. [PMID: 31437636 DOI: 10.1016/j.actbio.2019.08.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 08/12/2019] [Accepted: 08/15/2019] [Indexed: 01/04/2023]
Abstract
Although neodymium vanadate (NdVO4) has been investigated and applied in some fields owing to its intensive ultraviolet (UV) light absorption, weak absorption in visible (Vis) and near infrared (NIR) regions constrains its environmental remediation and biomedical applications. Herein, plasmonic precious metal Au as light trapping agent is deposited onto NdVO4 to form metal/semiconductor hybrid nanostructure for improving the Vis/NIR light absorption. NdVO4/Au heterojunction nanocrystals (NCs) were synthesized by NdVO4 nanorods (NRs) and plasmonic Au nanoparticles (NPs), followed by introducing polyvinylpyrrolidone (PVP) to enhance stability and biocompatibility, which exhibit elevated photocatalytic performance for organic dye degradation, photothermal conversion effect as high as 32.15% and cytotoxic reactive oxygen species (ROS) production ability. NdVO4/Au can be internalized efficiently via endocytosis and cause apparent phototoxicity on HeLa cells. In vivo experiments further show that NdVO4/Au can act as a high-efficiency NIR light-triggered anticancer agent with excellent tumor inhibition effect. In addition, based on outstanding light-to-heat conversion performance and thermal expansion effect under NIR irradiation, NdVO4/Au provides photothermal (PT) and photoacoustic (PA) dual-modal imaging platform for precise cancer diagnosis and treatment. STATEMENTS OF SIGNIFICANCE: It's the first report on integrating precious metal Au and rare earth orthovanadates semiconductor into NdVO4/Au heterojunction NCs. The as-prepared NdVO4/Au heterojunction NCs exhibits improved absorption in Vis/NIR region and increased generation efficiency of photo-induced electron/hole pairs due to the LSPR effect, which results in enhanced photothermal conversion efficiency and the production ability of cytotoxic O2- and OH in comparison with pristine NdVO4. For further clinical application, NdVO4/Au heterojunction NCs could be served as anticancer therapeutic agent for PA/PT dual-modal imaging guided and NIR-triggered photothermal/photodynamic synergistic anticancer treatment.
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Li M, Takei T, Zhu Q, Kim BN, Li JG. Morphology Tailoring of ZnWO4 Crystallites/Architectures and Photoluminescence of the Doped RE3+ Ions (RE = Sm, Eu, Tb, and Dy). Inorg Chem 2019; 58:9432-9442. [PMID: 31241327 DOI: 10.1021/acs.inorgchem.9b01271] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Nagyné-Kovács T, Shahnazarova G, Lukács IE, Szabó A, Hernadi K, Igricz T, László K, Szilágyi IM, Pokol G. Effect of pH in the Hydrothermal Preparation of Bi 2WO 6 Nanostructures. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E1728. [PMID: 31141883 PMCID: PMC6600692 DOI: 10.3390/ma12111728] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 05/20/2019] [Accepted: 05/23/2019] [Indexed: 11/24/2022]
Abstract
In this study, Bi2WO6 was prepared by the hydrothermal method. The effects of reaction temperature (150/170/200 °C) and reaction time (6/12/24 h) were investigated. The role of strongly acidic pH (1 >) and the full range between 0.3 and 13.5 were studied first. Every sample was studied by XRD and SEM; furthermore, the Bi2WO6 samples prepared at different temperatures were examined in detail by EDX and TEM, as well as FT-IR, Raman and UV-vis spectroscopies. It was found that changing the temperature and time slightly influenced the crystallinity and morphology of the products. The most crystallized product formed at 200 °C, 24 h. The pure, sheet-like Bi2WO6, prepared at 200 °C, 24 h, and 0.3 pH, gradually transformed into a mixture of Bi2WO6 and Bi3.84W0.16O6.24 with increasing pH. The nanosheets turned into a morphology of mixed shapes in the acidic range (fibers, sheets, irregular forms), and became homogenous cube- and octahedral-like shapes in the alkaline range. Their band gaps were calculated and were found to vary between 2.66 and 2.59 eV as the temperature increased. The specific surface area measurements revealed that reducing the temperature favors the formation of a larger surface area (35.8/26/21.6 m2/g belonging to 150/170/200 °C, respectively).
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Affiliation(s)
- Teodóra Nagyné-Kovács
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Műegyetem rakpart 3., H-1111 Budapest, Hungary.
| | - Gubakhanim Shahnazarova
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Műegyetem rakpart 3., H-1111 Budapest, Hungary.
| | - István Endre Lukács
- Research Institute for Technical Physics and Materials Science, Hungarian Academy of Sciences, Konkoly Thege M. út 29-33., H-1121 Budapest, Hungary.
| | - Anna Szabó
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich B.tér 1., H-6720 Szeged, Hungary.
| | - Klara Hernadi
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich B.tér 1., H-6720 Szeged, Hungary.
| | - Tamás Igricz
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Műegyetem rakpart 3., H-1111 Budapest, Hungary.
| | - Krisztina László
- Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, Műegyetem rakpart 3., H-1111 Budapest, Hungary.
| | - Imre M Szilágyi
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Műegyetem rakpart 3., H-1111 Budapest, Hungary.
| | - György Pokol
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Műegyetem rakpart 3., H-1111 Budapest, Hungary.
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2., H-1117 Budapest, Hungary.
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Stimulated Raman Scattering in Alkali-Earth Tungstate and Molybdate Crystals at Both Stretching and Bending Raman Modes under Synchronous Picosecond Pumping with Multiple Pulse Shortening Down to 1 ps. CRYSTALS 2019. [DOI: 10.3390/cryst9030167] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Comparative investigation of characteristics of spontaneous and stimulated Raman scattering (SRS) in different alkali-earth tungstate and molybdate crystals at both high and low frequency anionic group vibrations is presented. It has been found that, among these crystals, the SrMoO4 and SrWO4 crystals are the most perspective for SRS generation on both stretching and bending modes of internal anionic group vibrations with the strongest SRS pulse shortening under synchronous laser pumping because of not only highly intense stretching mode Raman line for efficient primary extra cavity long-shifted SRS conversion but also the widest bending mode Raman line for the strongest SRS pulse shortening down to the inverse width of the widest Raman line (~1 ps) at secondary intracavity short-shifted SRS conversion. The strongest 26-fold pump pulse shortening down to 1.4 ps at the Stokes component with the combined Raman shift in the synchronously pumped extra cavity SrMoO4 and SrWO4 Raman lasers has been demonstrated. It was found that synchronously pumped cascade SRS with combined Raman shift is more efficient in the SrWO4 crystal because the bending mode Raman line is more intense relative to the stretching mode Raman line than that in SrMoO4.
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Shutova M, Shutov AD, Zhdanova AA, Thompson JV, Sokolov AV. Coherent Raman Generation Controlled by Wavefront Shaping. Sci Rep 2019; 9:1565. [PMID: 30733515 PMCID: PMC6367464 DOI: 10.1038/s41598-018-38302-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Accepted: 12/21/2018] [Indexed: 12/03/2022] Open
Abstract
We investigate the possibility of tailoring coherent Raman generated spectra via adaptive wavefront optimization. Our technique combines a spatial light modulator and a spectrometer providing a feedback loop. The algorithm is capable of controlling the Raman generation, producing broader spectra and an improved overall efficiency, and increasing the intensity of high-order sidebands. Moreover, by wavefront optimization we can extend the generated spectra towards the blue spectral region and increase the total power of generated sidebands. Mutual coherence and equal frequency separation of the multiple Raman sidebands are of interest for the synthesis of ultrashort light pulses with the total spectral bandwidth extending over ultraviolet, visible and near-infrared wavelengths.
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Affiliation(s)
- Mariia Shutova
- Institute for Quantum Science and Engineering, Department of Physics and Astronomy, Texas A&M University, College Station, TX, 77843-4242, USA.
| | - Anton D Shutov
- Institute for Quantum Science and Engineering, Department of Physics and Astronomy, Texas A&M University, College Station, TX, 77843-4242, USA
| | - Alexandra A Zhdanova
- Institute for Quantum Science and Engineering, Department of Physics and Astronomy, Texas A&M University, College Station, TX, 77843-4242, USA
| | - Jonathan V Thompson
- Institute for Quantum Science and Engineering, Department of Physics and Astronomy, Texas A&M University, College Station, TX, 77843-4242, USA
| | - Alexei V Sokolov
- Institute for Quantum Science and Engineering, Department of Physics and Astronomy, Texas A&M University, College Station, TX, 77843-4242, USA
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19
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Popov PA, Skrobov SA, Zharikov EV, Lis DA, Subbotin KA, Ivleva LI, Shlegel’ VN, Kosmyna MB, Shekhovtsov AN. Investigation of the Thermal Conductivity of Tungstate Crystals. CRYSTALLOGR REP+ 2018. [DOI: 10.1134/s1063774518010145] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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20
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Chanu TTT, Rajmuhon Singh N. Investigation on optical band gap, photoluminescence properties and concentration quenching mechanism of Pb 1-x Tb 3+xWO 4 green-emitting phosphors. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 191:539-546. [PMID: 29100195 DOI: 10.1016/j.saa.2017.10.060] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 10/18/2017] [Accepted: 10/23/2017] [Indexed: 06/07/2023]
Abstract
A series of monophasic Tb3+ (2, 5, 7, 10 and 15at%) doped PbWO4 phosphors were successfully prepared via hydrothermal method. X-ray diffraction patterns revealed that the prepared samples possess a high crystallinity with tetragonal scheelite-type structure. FT-IR and Raman analysis exhibited a WO stretching peak of WO42- group, which is also related to the scheelite structure. UV-visible diffuse reflectance spectra indicated a reduction in the optical band gap with the replacement of Pb2+ by Tb3+ ions. The presence of strong and intense emission peaks characteristic of Tb3+ with the dominant peak at 545nm (green, 5D4→7F5 transition) under UV irradiation at 320nm demonstrated an efficient energy transfer from the host to Tb3+ ions. Using Van Uitert's model, the concentration quenching mechanism between Tb3+ ions in PbWO4:Tb3+ phosphor was attributed to a dipole-dipole interaction and the critical distance was determined to be ~12Å. The decay lifetimes and CIE chromaticity co-ordinates of PbWO4:Tb3+ phosphors were also investigated in detail. These prepared materials might serve as a potential phosphor for LED applications.
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Affiliation(s)
| | - N Rajmuhon Singh
- Department of Chemistry, Manipur University, Canchipur-795 003, Imphal, Manipur, India.
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21
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Huang J, Li Q, Wang J, Jin L, Tian B, Li C, Shi Y, Wang Z, Hao J. Controllable synthesis of lanthanide Yb3+ and Er3+ co-doped AWO4 (A = Ca, Sr, Ba) micro-structured materials: phase, morphology and up-conversion luminescence enhancement. Dalton Trans 2018; 47:8611-8618. [DOI: 10.1039/c7dt04756h] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The combination of CDs can mainly maintain the morphologies of AWO4:Yb3+,Er3+ but prominently increase their up-conversion luminescence performance.
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Affiliation(s)
- Jingbin Huang
- Henan Key Laboratory of Rare Earth Functional Materials
- The Key Laboratory of Rare Earth Functional Materials and Applications
- Zhoukou Normal University
- Zhoukou 466001
- P. R. China
| | - Qingfeng Li
- Henan Key Laboratory of Rare Earth Functional Materials
- The Key Laboratory of Rare Earth Functional Materials and Applications
- Zhoukou Normal University
- Zhoukou 466001
- P. R. China
| | - Jia Wang
- Henan Key Laboratory of Rare Earth Functional Materials
- The Key Laboratory of Rare Earth Functional Materials and Applications
- Zhoukou Normal University
- Zhoukou 466001
- P. R. China
| | - Lin Jin
- Henan Key Laboratory of Rare Earth Functional Materials
- The Key Laboratory of Rare Earth Functional Materials and Applications
- Zhoukou Normal University
- Zhoukou 466001
- P. R. China
| | - Boshi Tian
- Henan Key Laboratory of Rare Earth Functional Materials
- The Key Laboratory of Rare Earth Functional Materials and Applications
- Zhoukou Normal University
- Zhoukou 466001
- P. R. China
| | - Chunyang Li
- Henan Key Laboratory of Rare Earth Functional Materials
- The Key Laboratory of Rare Earth Functional Materials and Applications
- Zhoukou Normal University
- Zhoukou 466001
- P. R. China
| | - Yurong Shi
- Henan Key Laboratory of Rare Earth Functional Materials
- The Key Laboratory of Rare Earth Functional Materials and Applications
- Zhoukou Normal University
- Zhoukou 466001
- P. R. China
| | - Zhenling Wang
- Henan Key Laboratory of Rare Earth Functional Materials
- The Key Laboratory of Rare Earth Functional Materials and Applications
- Zhoukou Normal University
- Zhoukou 466001
- P. R. China
| | - Jianhua Hao
- Department of Applied Physics
- The Hong Kong Polytechnic University
- P. R. China
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22
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Nikkinen J, Härkönen A, Guina M. Sub-50 ps pulses at 620 nm obtained from frequency doubled 1240 nm diamond Raman laser. OPTICS EXPRESS 2017; 25:30365-30370. [PMID: 29221066 DOI: 10.1364/oe.25.030365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 11/04/2017] [Indexed: 06/07/2023]
Abstract
We report a monolithic 1240 nm diamond Raman laser producing pulses with duration of 42-62 ps at 100 kHz repetition rate, and maximum average power of 246 mW. The Raman laser is formed by a 0.5-mm thick planar diamond, coated on both sides and pumped by ~100 ps pulses from a Q-switched 1064 nm laser. The maximum conversion efficiency from 1064 nm to 1240 nm was about 25%. The 1240 nm signal was frequency-doubled in single-pass configuration through a 10-mm long LBO crystal, enabling generation of pulses with a duration of 29-46 ps at 620 nm. The maximum average power at 620 nm was 128 mW, and the maximum conversion efficiency from 1240 nm to 620 nm was 50%. The Raman laser provides an efficient and flexible way to extend short pulse operation to wavelengths in spectral domains difficult to reach, such as 620 nm and in addition provides a simple pulse shortening mechanisms.
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23
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Osewski P, Belardini A, Petronijevic E, Centini M, Leahu G, Diduszko R, Pawlak DA, Sibilia C. Self-Phase-Matched Second-Harmonic and White-Light Generation in a Biaxial Zinc Tungstate Single Crystal. Sci Rep 2017; 7:45247. [PMID: 28338074 PMCID: PMC5364410 DOI: 10.1038/srep45247] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 02/20/2017] [Indexed: 11/21/2022] Open
Abstract
Second-order nonlinear optical materials are used to generate new frequencies by exploiting second-harmonic generation (SHG), a phenomenon where a nonlinear material generates light at double the optical frequency of the input beam. Maximum SHG is achieved when the pump and the generated waves are in phase, for example through birefringence in uniaxial crystals. However, applying these materials usually requires a complicated cutting procedure to yield a crystal with a particular orientation. Here we demonstrate the first example of phase matching under the normal incidence of SHG in a biaxial monoclinic single crystal of zinc tungstate. The crystal was grown by the micro-pulling-down method with the (102) plane perpendicular to the growth direction. Additionally, at the same time white light was generated as a result of stimulated Raman scattering and multiphoton luminescence induced by higher-order effects such as three-photon luminescence enhanced by cascaded third-harmonic generation. The annealed crystal offers SHG intensities approximately four times larger than the as grown one; optimized growth and annealing conditions may lead to much higher SHG intensities.
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Affiliation(s)
- Pawel Osewski
- Institute of Electronic Materials Technology, Wolczynska 133, 01-919, Warsaw, Poland
| | | | | | - Marco Centini
- University of Rome "La Sapienza", 16 A. Scarpa, Rome, 00161, Italy
| | - Grigore Leahu
- University of Rome "La Sapienza", 16 A. Scarpa, Rome, 00161, Italy
| | - Ryszard Diduszko
- Institute of Electronic Materials Technology, Wolczynska 133, 01-919, Warsaw, Poland
| | - Dorota A Pawlak
- Institute of Electronic Materials Technology, Wolczynska 133, 01-919, Warsaw, Poland.,Centre of New Technologies University of Warsaw, Banacha 2C, 02-097 Warsaw, Poland
| | - Concita Sibilia
- University of Rome "La Sapienza", 16 A. Scarpa, Rome, 00161, Italy
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24
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Kaczmarek AM, Van Hecke K, Van Deun R. Low-Percentage Ln3+ Doping in a Tetranuclear Lanthanum Polyoxometalate Assembled from [Mo7O24]6– Polyanions Yielding Visible and Near-Infrared Luminescence. Inorg Chem 2017; 56:3190-3200. [DOI: 10.1021/acs.inorgchem.6b02130] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anna M. Kaczmarek
- L3-Luminescent Lanthanide Lab, Department of Inorganic and Physical Chemistry and ‡XStruct, Department of Inorganic
and Physical Chemistry, Ghent University, Krijgslaan 281-S3, B-9000 Gent, Belgium
| | - Kristof Van Hecke
- L3-Luminescent Lanthanide Lab, Department of Inorganic and Physical Chemistry and ‡XStruct, Department of Inorganic
and Physical Chemistry, Ghent University, Krijgslaan 281-S3, B-9000 Gent, Belgium
| | - Rik Van Deun
- L3-Luminescent Lanthanide Lab, Department of Inorganic and Physical Chemistry and ‡XStruct, Department of Inorganic
and Physical Chemistry, Ghent University, Krijgslaan 281-S3, B-9000 Gent, Belgium
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25
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Zhang L, Lin H, Zhang G, Mateos X, Serres JM, Aguiló M, Díaz F, Griebner U, Petrov V, Wang Y, Loiko P, Vilejshikova E, Yumashev K, Lin Z, Chen W. Crystal growth, optical spectroscopy and laser action of Tm 3+-doped monoclinic magnesium tungstate. OPTICS EXPRESS 2017; 25:3682-3693. [PMID: 28241581 DOI: 10.1364/oe.25.003682] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report on the crystal growth, spectroscopic investigation and laser performance of Tm3+-doped monoclinic magnesium tungstate (Tm:MgWO4), for the first time, to the best of our knowledge. A high-quality crystal has been grown by the top seeded solution growth method. The relevant spectroscopic properties are characterized in terms of absorption, luminescence and Raman spectroscopy. Judd-Ofelt (J-O) analysis is performed to evaluate the spontaneous emission probabilities and the radiative lifetimes. The absorption, stimulated-emission and gain cross-section spectra are determined for the principal light polarizations. The first laser action in the 2 μm spectral range is demonstrated in the regime of continuous-wave operation with a maximum output power of 775 mW and a slope efficiency of 39%.
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26
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Atuchin V, Galashov E, Khyzhun O, Bekenev V, Pokrovsky L, Borovlev Y, Zhdankov V. Low Thermal Gradient Czochralski growth of large CdWO4 crystals and electronic properties of (010) cleaved surface. J SOLID STATE CHEM 2016. [DOI: 10.1016/j.jssc.2015.05.017] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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27
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Chen P, Xia M, Li R. Mixed Alkali Neodymium Orthoborates: K9
Li3
Nd3
(BO3
)7
and A
2
LiNd(BO3
)2
(A
= Rb, Cs). Z Anorg Allg Chem 2016. [DOI: 10.1002/zaac.201500804] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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28
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Yang L, Teng F, Xu J, Yang Y, Kan Y, Gu W. Na0.5Ce0.5MoO4 as a new light absorption material to efficiently degrade RhB under visible light irradiation. RSC Adv 2016. [DOI: 10.1039/c6ra07362j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Na0.5Ce0.5MoO4, with a high visible light absorption and a high conductivity, remarkably improves photocatalytic activity of Na0.5Ce0.5MoO4/MoO3 heterojunctions under visible light irradiation.
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Affiliation(s)
- Liming Yang
- Jiangsu Engineering and Technology Research Center of Environmental Cleaning Materials (ECM)
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC)
- Jiangsu Joint Laboratory of Atmospheric Pollution Control (APC)
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (AEET)
- School of Environmental Science and Engineering
| | - Fei Teng
- Jiangsu Engineering and Technology Research Center of Environmental Cleaning Materials (ECM)
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC)
- Jiangsu Joint Laboratory of Atmospheric Pollution Control (APC)
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (AEET)
- School of Environmental Science and Engineering
| | - Juan Xu
- Jiangsu Engineering and Technology Research Center of Environmental Cleaning Materials (ECM)
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC)
- Jiangsu Joint Laboratory of Atmospheric Pollution Control (APC)
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (AEET)
- School of Environmental Science and Engineering
| | - Yang Yang
- Jiangsu Engineering and Technology Research Center of Environmental Cleaning Materials (ECM)
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC)
- Jiangsu Joint Laboratory of Atmospheric Pollution Control (APC)
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (AEET)
- School of Environmental Science and Engineering
| | - Yandong Kan
- Jiangsu Engineering and Technology Research Center of Environmental Cleaning Materials (ECM)
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC)
- Jiangsu Joint Laboratory of Atmospheric Pollution Control (APC)
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (AEET)
- School of Environmental Science and Engineering
| | - Wenhao Gu
- Jiangsu Engineering and Technology Research Center of Environmental Cleaning Materials (ECM)
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC)
- Jiangsu Joint Laboratory of Atmospheric Pollution Control (APC)
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (AEET)
- School of Environmental Science and Engineering
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29
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Kaczmarek AM, Ndagsi D, Van Deun R. Dopant and excitation wavelength dependent color tunability in Dy3+:YVO4 and Dy3+/Eu3+:YVO4 microparticles towards white light emission. Dalton Trans 2016; 45:16231-16239. [DOI: 10.1039/c6dt02347a] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The emission color of Dy:YVO4 and Dy,Eu:YVO4 microstructures could be tuned towards white light and white light with a yellow undertone through varying the Ln3+ doping percentages as well as the excitation wavelengths.
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Affiliation(s)
- Anna M. Kaczmarek
- L3
- Luminescent Lanthanide Lab
- Department of Inorganic and Physical Chemistry
- Ghent University
- B-9000 Ghent
| | - Dorine Ndagsi
- L3
- Luminescent Lanthanide Lab
- Department of Inorganic and Physical Chemistry
- Ghent University
- B-9000 Ghent
| | - Rik Van Deun
- L3
- Luminescent Lanthanide Lab
- Department of Inorganic and Physical Chemistry
- Ghent University
- B-9000 Ghent
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30
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Lim CS, Aleksandrovsky A, Molokeev M, Oreshonkov A, Atuchin V. Microwave sol–gel synthesis and upconversion photoluminescence properties of CaGd2(WO4)4:Er3+/Yb3+ phosphors with incommensurately modulated structure. J SOLID STATE CHEM 2015. [DOI: 10.1016/j.jssc.2015.04.032] [Citation(s) in RCA: 137] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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31
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Ding Z, Ding S, Jia H, Liu J, Yang L, Huangfu J, Wang S. Laser diode pumped, actively Q-switched, and mode-locked Nd:YAG/PbWO(4) Raman laser. APPLIED OPTICS 2015; 54:5375-5381. [PMID: 26192837 DOI: 10.1364/ao.54.005375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A compact laser diode pumped, actively Q-switched, and mode-locked Nd:YAG/PbWO(4) Raman laser is demonstrated. With the incident pump power of 9.11 W and pulse repetition frequency of 15 kHz, a maximum average output power of 1.003 W at 1178 nm was obtained and the corresponding conversion efficiency was 11%. A perfect stable mode-locking operation with the modulation depth of 100% was obtained and the corresponding mode-locking pulse width was less than 207 ps. The actively Q-switched and mode-locked Raman laser was theoretically analyzed and calculations were conducted using the fluctuation rate equation model.
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32
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Ding CC, Wu SY, Zhu QS, Li GL, Zhang ZH, Xu YQ. Theory studies of the local lattice distortions and the EPR parameters for Cu2+, Mn2+and Fe3+centres in ZnWO4. Mol Phys 2015. [DOI: 10.1080/00268976.2015.1006277] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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33
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Zhang Y, Wang X, Yang Y, Liu B, Lv X, Wei L, Yu H, Zhang H. Thermal and spectroscopic characteristics of disordered melilite Nd:BaLaGa3O7 crystal. RSC Adv 2015. [DOI: 10.1039/c5ra11015g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
1 at% Nd:BaLaGa3O7 disordered crystal has a large emission bandwidth of 32 nm at 1060 nm.
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Affiliation(s)
- Yuanyuan Zhang
- New Materials Institute
- Shandong Academy of Sciences
- Ji'nan 250014
- China
| | - Xuping Wang
- New Materials Institute
- Shandong Academy of Sciences
- Ji'nan 250014
- China
| | - Yuguo Yang
- New Materials Institute
- Shandong Academy of Sciences
- Ji'nan 250014
- China
| | - Bing Liu
- New Materials Institute
- Shandong Academy of Sciences
- Ji'nan 250014
- China
| | - Xianshun Lv
- New Materials Institute
- Shandong Academy of Sciences
- Ji'nan 250014
- China
| | - Lei Wei
- New Materials Institute
- Shandong Academy of Sciences
- Ji'nan 250014
- China
| | - Haohai Yu
- State Key Laboratory of Crystal Materials and Institute of Crystal Materials
- Shandong University
- Ji'nan 250100
- China
| | - Huaijin Zhang
- State Key Laboratory of Crystal Materials and Institute of Crystal Materials
- Shandong University
- Ji'nan 250100
- China
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34
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Kaczmarek AM, Van Hecke K, Van Deun R. Enhanced Luminescence in Ln3+-Doped Y2WO6 (Sm, Eu, Dy) 3D Microstructures through Gd3+ Codoping. Inorg Chem 2014; 53:9498-508. [DOI: 10.1021/ic5005837] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Anna M. Kaczmarek
- L3 −
Luminescent Lanthanide Lab, Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281-S3, B-9000 Ghent, Belgium
| | - Kristof Van Hecke
- XStruct, Department
of Inorganic and Physical Chemistry Ghent University, Krijgslaan
281-S3, B-9000 Ghent, Belgium
| | - Rik Van Deun
- L3 −
Luminescent Lanthanide Lab, Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281-S3, B-9000 Ghent, Belgium
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35
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Xu L, Yang X, Lu H, Hu C, Hou W. NaY(MoO4)2 microcrystals with controlled faceting and their tunable photoluminescence properties after doping with Eu3+. RSC Adv 2014. [DOI: 10.1039/c4ra00244j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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36
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Zhao J, Zhang X, Guo X, Bao X, Li L, Cui J. Diode-pumped actively Q-switched Tm, Ho:GdVO4/BaWO4 intracavity Raman laser at 2533 nm. OPTICS LETTERS 2013; 38:1206-1208. [PMID: 23595432 DOI: 10.1364/ol.38.001206] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A compact diode-end-pumped actively Q-switched intracavity Raman laser with Tm,Ho:GdVO(4) laser gain medium and BaWO(4) Raman gain crystal is demonstrated for the first time. The Raman threshold is as low as 2.0 W of diode power at 802 nm. The highest average output power of 186 mW at the first Stokes wavelength of 2533 nm is obtained at a pulse repetition rate of 1 kHz, and a pump power of 2.8 W, corresponding to a diode-to-Stokes optical conversion efficiency of 6.6%. The pulsewidth and pulse energy are 7.8 ns and 0.19 mJ, respectively.
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Affiliation(s)
- Jiaqun Zhao
- Key Laboratory of In-Fiber Integrated Optics (Ministry of Education) and College of Science, Harbin Engineering University, Harbin 150001, China
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37
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Kaczmarek AM, Liu YY, Van Der Voort P, Van Deun R. Tuning the architecture and properties of microstructured yttrium tungstate oxide hydroxide and lanthanum tungstate. Dalton Trans 2013; 42:5471-9. [DOI: 10.1039/c3dt32699c] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Xu L, Yang X, Zhai Z, Gu D, Pang H, Hou W. Self-assembled 3D architectures of NaCe(MoO4)2 and their application as absorbents. CrystEngComm 2012. [DOI: 10.1039/c2ce25897h] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Huang S, Zhang X, Wang L, Bai L, Xu J, Li C, Yang P. Controllable synthesis and tunable luminescence properties of Y2(WO4)3:Ln3+ (Ln = Eu, Yb/Er, Yb/Tm and Yb/Ho) 3D hierarchical architectures. Dalton Trans 2012; 41:5634-42. [DOI: 10.1039/c2dt30221g] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Kim DW, Cho IS, Shin SS, Lee S, Noh TH, Kim DH, Jung HS, Hong KS. Electronic band structures and photovoltaic properties of MWO4 (M=Zn, Mg, Ca, Sr) compounds. J SOLID STATE CHEM 2011. [DOI: 10.1016/j.jssc.2011.06.005] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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41
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Li YY, Cheng WD, Zhang H, Lin CS, Zhang WL, Geng L, Chai GL, Luo ZZ, He ZZ. A series of novel rare-earth bismuth tungstate compounds LnBiW2O9 (Ln = Ce, Sm, Eu, Er): Synthesis, crystal structure, optical and electronic properties. Dalton Trans 2011; 40:7357-64. [DOI: 10.1039/c1dt10460h] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Lin J, Pask HM, Lee AJ, Spence DJ. Study of relaxation oscillations in continuous-wave intracavity Raman lasers. OPTICS EXPRESS 2010; 18:11530-11536. [PMID: 20589014 DOI: 10.1364/oe.18.011530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We study the relaxation oscillations in a continuous-wave intracavity Raman laser both theoretically and experimentally. Analytic expressions for the relaxation oscillation frequency are derived from the rate-equations and are validated by experiments. We show that some important experimental parameters such as the effective Raman gain coefficient and intracavity Stokes loss can be determined simply by measuring the relaxation oscillation frequency versus pump power.
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Affiliation(s)
- Jipeng Lin
- MQ Photonics Research Centre, Department of Physics and Engineering, Macquarie University, NSW 2109 Australia.
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Guo X, Yang J, Deng Y, Wei H, Zhao D. Hydrothermal Synthesis and Photoluminescence of Hierarchical Lead Tungstate Superstructures: Effects of Reaction Temperature and Surfactants. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.200901214] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Gu J, Zhu Y, Li H, Zhang X, Qian Y. Uniform Ln3+ (Eu3+, Tb3+) doped NaLa(WO4)2 nanocrystals: Synthesis, characterization, and optical properties. J SOLID STATE CHEM 2010. [DOI: 10.1016/j.jssc.2009.12.019] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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45
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Tyagi M, Singh SG. Effect of doping concentration on spectroscopic and structural properties of Nd:NaY(WO(4))(2) crystal. APPLIED OPTICS 2009; 48:3225-3231. [PMID: 19516372 DOI: 10.1364/ao.48.003225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The optical and structural properties of NaNd(x)Y(1-x)(WO(4))(2) (NYW) single crystals grown from melt containing 1-10 at. % of Nd have been investigated. Optical absorption, photoluminescence, x-ray diffraction, and x-ray florescence studies have been carried out on grown crystals. The crystal is found to exhibit a broad absorption peak of ~16 nm width at 806 nm for 6 at. % of Nd doping. A decrease in fluorescence lifetime from 150 to 80 mus with an increase in Nd(3+) concentration is observed for 1.06 mum emission. Spectroscopic quality parameters (Omega(4)/Omega(6)) and quantum efficiency calculated from the above measurements and application of Judd-Ofelt theory are found to be 1.1 and 68%, respectively. Structural analysis through Rietveld refinement of x-ray diffraction data showed that the oxygen sublattice of NYW is not affected by changes in Nd dopant concentration, though the lattice dimensions are found to increase proportionately. The study for the first time shows that the high doping levels do not introduce any strain into the lattice. As a consequence the optical quality of the crystal does not deteriorate at high doping levels. The selection of doping concentration is therefore solely governed by the decay time requirement for a particular application.
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Affiliation(s)
- Mohit Tyagi
- Crystal Technology Laboratory, TPPED, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
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Huang Y, Seo HJ. Multisite Structure of PbWO4:Eu3+ Crystals Investigated by Site-Selective Laser-Excitation Spectroscopy. J Phys Chem A 2009; 113:5317-23. [DOI: 10.1021/jp901099h] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yanlin Huang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China, and Department of Physics, Pukyong National University, Busan 608-737, Korea
| | - Hyo Jin Seo
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China, and Department of Physics, Pukyong National University, Busan 608-737, Korea
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Mildren RP, Coutts DW, Spence DJ. All-solid-state parametric Raman anti-Stokes laser at 508 nm. OPTICS EXPRESS 2009; 17:810-818. [PMID: 19158895 DOI: 10.1364/oe.17.000810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We report a parametric anti-Stokes Raman laser using potassium gadolinium tungstate, generating output chiefly at the first anti-Stokes at 508 nm. The compact 4.5 cm long device is pumped by a Q-switched 532 nm laser and uses an off-axis Stokes resonator to provide non-collinear phase matching between the pump and the generated Stokes and anti-Stokes fields. Anti-Stokes output energies up 0.27 mJ were obtained at a conversion efficiency from the pump of 0.46%. Second- and third-order anti-Stokes lines at 486 nm and 465 nm were also observed.
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Affiliation(s)
- R P Mildren
- MQ Photonics Research Centre, Department of Physics, Macquarie University, NSW 2109, Australia.
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Samuel P, Moorthy Babu S. Growth and characterization of Ytterbium doped KGd(WO4)2single crystal. CRYSTAL RESEARCH AND TECHNOLOGY 2008. [DOI: 10.1002/crat.200800114] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Huang Y, Tsuboi T, Seo HJ. Spectroscopic Properties of Pr3+ Ions in a PbWO4 Single Crystal. J Phys Chem A 2008; 112:5839-45. [DOI: 10.1021/jp712030q] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yanlin Huang
- School of Material Engineering, Soochow University, 178 GanJiang East Road, Suzhou, 215021, P. R. China, Faculty of Engineering, Kyoto Sangyo University, Kamigamo, Kita-Ku, Kyoto 603-8555, Japan, and Department of Physics, Pukyong National University, Busan 608-737, Republic of Korea
| | - Taiju Tsuboi
- School of Material Engineering, Soochow University, 178 GanJiang East Road, Suzhou, 215021, P. R. China, Faculty of Engineering, Kyoto Sangyo University, Kamigamo, Kita-Ku, Kyoto 603-8555, Japan, and Department of Physics, Pukyong National University, Busan 608-737, Republic of Korea
| | - Hyo Jin Seo
- School of Material Engineering, Soochow University, 178 GanJiang East Road, Suzhou, 215021, P. R. China, Faculty of Engineering, Kyoto Sangyo University, Kamigamo, Kita-Ku, Kyoto 603-8555, Japan, and Department of Physics, Pukyong National University, Busan 608-737, Republic of Korea
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Ryu EK, Huh YD. Synthesis of CaWO 4by a Microemulsion Method. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2008. [DOI: 10.5012/jkcs.2008.52.2.164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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