JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 6
·3789-3799
·
IF 3.5
Shuangli Dong,Weichao Wang,Yanqi Jia,Qinyuan Zhang
Quantitative composition-structure-property (C–S–P) relationship analysis is a promising approach to correlate structural features with properties of glasses that have complex structures and lack long-range order. In this study, the structure and spectroscopic properties of two typical P 2 O 5 -MO-K 2 O-Al 2 O 3 (M = Mg, Ba) quaternary phosphate laser glasses doped with Nd 3+ ions are calculated and predicted. By using the nearest-neighboring congruently melting compounds in the phase diagram as “component and structural motifs”, correlations with properties and insights on glass behaviors can be obtained. Two key physical properties and five spectroscopic properties are predicted and verified with an error of less than 5% and 10%, respectively. Furthermore, two C–S–P databases with more than 1000 glass compositions are established for designing and optimizing new laser glasses. The results show that this approach not only gets rid of the traditional qualitative research method which relies on empirical formulas, but also promotes the quantitative calculation and predictable design of glass research.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2018
·
IF 2.207
Yong Shi,Fengming Yang,Chuanzhen Zhao,Yan Huang,Mengzhu Li,Qingjun Zhou,Qiuyue Li,Zepeng Li,Junming Liu,Tong Wei
Up-conversion (UC) oxides comprise a huge family of materials with abundant optical functionalities and they merit extensive research. Some members of this family have been modified with proper rare earth (RE 3+ ) ions and their importance has recently been established in non-contact temperature sensors , although the thermal sensitivity (S) value was still low. In this study, we investigated Nd 3+ and Yb 3+ sensitized Ba 4 La 2 Ti 4 Nb 6 O 30 (BLTN:xNd 3+ /Yb 3+ ) with a tungsten bronze structure for use as optical thermometers for the first time. Under excitation at 980 nm, obvious near-infrared emissions corresponding to 4 F 7/2 / 4 S 3/2 → 4 I 9/2 , 4 F 5/2 / 2 H 9/2 → 4 I 9/2 , and 4 F 3/2 → 4 I 9/2 transitions were observed, and the UC mechanism involved was elaborated. Furthermore, the UC thermometric properties were investigated according to the fluorescence intensity ratio technique and the maximum S values determined for BLTN:xNd 3+ /Yb 3+ (x = 0.12 and 0.16) samples were both higher than 0.03 K –1 . The potential of BLTN:xNd 3+ /Yb 3+ for use in optical thermometers was estimated based on comparisons with other active materials.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Wen Qian,Di Wu,Zheyu He,Dongyang Li,Jiajie Yan,Xiao Wang,Yimin Li
Lead zirconate titanate (PZT)-based piezoelectric ceramics are key functional materials for ultrasonic transducers, where the balance between piezoelectric activity and dielectric loss directly determines the energy conversion efficiency and thermal stability of devices. However, a fundamental trade-off exists between these two properties, as enhancing piezoelectric performance is often accompanied by increased dielectric loss, resulting in excessive heat generation and degraded long-term reliability during high-power operation. Moreover, the microscopic mechanism governing the balance between piezoelectric and dielectric properties in multi-component co-doped PZT systems remains insufficiently understood. In this work, a defect-dipole reconstruction strategy is proposed by introducing Nd 3+ donor ions into Ni 2+ -modified PZT ceramics. The results demonstrate that this strategy enables a stable low dielectric loss (tanδ = 0.02-0.03) over a broad temperature range from room temperature to 300 °C while maintaining desirable piezoelectric activity. The optimized NNPZT2 composition achieves a high piezoelectric coefficient (d 33 ) of 260.6 pC/N. Such balanced electrical performance originates from the synergistic regulation of defect chemistry and polarization behavior: Nd 3+ incorporation is proposed to destabilize the ordered Ni 2+ -induced defect-dipole configuration through donor-acceptor charge compensation and subsequently reconstructs a localized polarization state dominated by polar nanoregions (PNRs). This polarization reconstruction facilitates reversible polarization switching while suppressing oxygen-vacancy-related dielectric loss. This work provides new insights into donor-acceptor interaction-mediated defect regulation and polarization reconstruction in PZT ceramics, offering an effective strategy for designing high-performance piezoelectric materials with simultaneously low dielectric loss, improved thermal stability, and enhanced energy conversion efficiency for wide-temperature-range electromechanical applications.
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Yongqiang Zhang,Zhiwei Zhou,Bingchu Mei
The high optical quality Nd 3+ doped asymmetrical (Ca x Sr 1-x ) 5 (PO 4 ) 3 F transparent ceramics were successfully fabricated using the hot-pressing method. The phase composition, in-line optical transmittance, microstructure and fluorescence properties were discussed. The findings revealed that the Ca 2+ and Sr 2+ were dissolved in Sr 5 (PO 4 ) 3 F crystal cell instead of forming a new heterophase structure. The prepared ceramics exhibited an in-line transmittance of 75 % at 1μm and 55 % at 600 nm, demonstrating high transparency rather than translucency. The emission intensity and FWHM of neodymium doped ceramic samples can be significantly enhanced through co-doping with Ca 2+ and Sr 2+ . Furthermore, by adjusting the Ca/Sr ratio, these samples can achieve controllable emission light within the wavelength range between neodymium doped FAP and S-FAP emissions. The fluorescence lifetime was obviously improved compared with Nd: FAP and slightly reduced compared with Nd: S-FAP. Moreover, the fluorescence lifetime trend varies in accordance with the alteration of lattice constant.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Wei Xu,Yuwei Hu,Longjiang Zheng,Zhiguo Zhang,Wenwu Cao,Hailong Liu,Xijun Wu
Rare earth ions doped luminescent materials have demonstrated their potentiality as sensitive thermometers with good accuracy and high spatial resolution. Nevertheless, low luminescence efficiency, especially at high temperature, still limits the development of this thermometry technique. Here, Nd 3+ /Yb 3+ codoped CaWO 4 phosphors were synthesized using high temperature solid-state method, and Li + ions were introduced aiming to improve the near-infrared (NIR) emissions from Nd 3+ in the spectral range of 725–950 nm. The influence of Li + codoping on the structure and NIR luminescence in CaWO 4 : Nd 3+ /Yb 3+ when excited by a 980 nm laser diode was investigated. NIR-NIR emissions from Li + codoped samples are successfully strengthened compared with that without Li + ions, which is mainly attributed to the distortion of the crystal structure and the increase of crystalline size by Li + . The optical temperature sensing behavior of NIR luminescence from Nd 3+ was studied based on fluorescence intensity ratio (FIR). Assisted by Li + ions, the NIR-NIR emissions are observed to be effectively enhanced with the increment of temperature. And a new pair of thermally coupled levels in Nd 3+ ions with excellent thermometry characteristics is explored, through which superior measurement sensitivity as well as accuracy could be achieved. In addition, light-induced temperature rise was realized in the phosphors, which makes CaWO 4 : Nd 3+ /Yb 3+ /Li + excellent candidate for luminescence thermometry and optical heaters.
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DOI
高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2020
·Vol. 37
·期 2
·1900445
·
IF 3.099
Artem Yakovliev,Tymish Y. Ohulchanskyy,Roman Ziniuk,Tereza Dias,Xin Wang,Hao Xu,Guanying Chen,Junle Qu,Anderson S. L. Gomes
In this work, the application of near infrared (NIR)-emitting NaYbF 4 :1%Tm 3+ @NaLuF 4 :30%Nd 3+ core–shell nanoparticles is reported for noninvasive probing and monitoring the temperature during photopolymerization of dental materials. When excited at 808 nm, the synthesized nanoparticles emit NIR photoluminescence (PL) with two distinctive peaks at 865 and 980 nm which correspond to radiative transitions from the doped Nd 3+ and Yb 3+ ions, respectively. Luminescence intensity ratio between these two bands is found to vary with temperature due to temperature-dependent electronic excitation energy transfer between Nd 3+ and Yb 3+ ions at the core/shell interface. This finding allows luminescence ratiometric evaluation of the in situ temperature during photopolymerization of resin cement (doped with nanoparticles) in a veneer placement procedure. In addition, the NIR emission also enables PL imaging of the distribution of the adhesive under the veneer. The results highlight that rare-earth ions–doped nanoparticles with both excitation and emission in the NIR spectral range are advantageous for both PL-based nanothermometry and imaging due to the reduced attenuation of NIR light by dental ceramics.
研究领域:
生物医学工程
·
牙体牙髓病学
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纳米医学
·
光学成像
·
生物材料
✓ 已验证
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 31
·18070-18075
·
IF 3.049
Yabing Li,Fujin Li,Yanan Huang,Haiyan Wu,Jian Wang,Jin Yang,Qingbo Xiao,Hongzhen Lin
Small-sized lanthanide-doped nanoparticles (NPs) exhibiting superior near-infrared (NIR) luminescence properties are highly desired for bioimaging applications. Herein, Fe3+ ions are codoped in NaGdF4:Nd3+ nanocrystals via a simple coprecipitation method, which can simultaneously reduce the particle size and enhance the downconverting NIR luminescence of the NPs. The NIR luminescence intensity reaches the maximum for the obtained sub-5 nm NPs when the doping concentration of Fe3+ is tuned to 20 mol%, which is ∼1.7 times higher than that of the pristine 8.7 nm NPs without Fe3+ doping. After being modified with targeting molecules, the ultra-small NaGdF4:Nd3+,Fe3+ NPs were successfully applied as luminescent probes for targeted NIR imaging of tumors in biological tissues. Moreover, they also show great potential as a high contrast agent for T2-weighted MRI imaging.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 5
·728
·
IF 5.719
Wei Zhang,Yang Zang,Yanli Lu,Jinghui Han,Qingyun Xiong,Jinping Xiong
In this study. a novel near-infrared fluorescent-driven contrast agent (Ag-doped NaYF4:Yb3+/Er3+@NaYF4:Nd3+@NaGdF4) was synthesized using a coprecipitation-hydrothermal-solvothermal-solvothermal (CHSS) method. The results shows that hexagonal NaYF4:Yb3+/Er3+with a diameter of 300 nm was successfully synthesized by the CHSS method. The new contrast agent was characterized using scanning electron microscopy, fluorescence spectrometry, transmission electron microscopy, energy-dispersive spectrometry and ultraviolet-visible light diffuse reflectance absorption spectroscopy. Even at low concentrations (0.2 M), this proposed contrast agent can be excited by near-infrared light with a wavelength of 980 nm and emits a dazzling green light with a wavelength of 540 nm, and the comparison of the luminescence intensity proves that doping with silver increases the luminescence intensity of the upconverted nanomaterial by nearly 13 times based on the calculated quantum yield. TEM images show the successful preparation of silver nanoparticles with a diameter of 30 nm, and the energy spectrum shows the successful doping of silver nanoparticles and the successful preparation of the core-shell structure of NaYF4:Yb3+/Er3+@NaYF4:Nd3+@NaGdF4. Furthermore, the mechanism of the increased luminous intensity has been studied using simulation calculations. Finally, cytotoxicity tests were used to test material which was modified by 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[amino(polyethylene glycol)-2000] (DSPE-PEG2K), and the biocompatibility was significantly improved, meeting the standard for biological applications.Keywords:upconversion;near-infrared;intensity;in vivo imaging
研究领域:
材料科学
·
生物医学工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Crystals
·
2022
·Vol. 12
·期 7
·963
·
IF 2.67
Weili Wang,Shihai Miao,Dongxun Chen,Yanjie Liang
Trivalent lanthanides (Ln3+) doped bismuth-based inorganic compounds have attracted considerable interest as promising candidates for next-generation inorganic luminescent materials. Here, a series of K0.3Bi0.7F2.4(KBF) nanocrystalline particles with controlled morphology have been synthesized through a low-temperature aqueous-phase precipitation method. Using KBF as the host matrix, Eu3+, Tb3+, Pr3+, Nd3+, Sm3+,and Dy3+ions are introduced to obtain K0.3Bi0.7F2.4:Ln3+(KBF:Ln) nanophosphors. The as-prepared KBF:Ln nanophosphors exhibit commendable photoluminescence properties, in which multicolor emissions in a single host lattice can be obtained by doping different Ln3+ions when excited by ultraviolet light. Moreover, the morphology and photoluminescence performance of these nanophosphors remain unchanged under different soaking times in water, showing good stability in a humid environment. The proposed simple and rapid synthesis route, low-cost and nontoxic bismuth-based host matrix, and tunable luminescent colors will lead the way to access these KBF:Ln nanophosphors for appealing applications such as white LEDs and optical thermometry.
研究领域:
材料科学
·
纳米技术
·
光学
·
化学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2024
·
IF 6.1
Zhijiao Zhao,Mengmeng Dai,Kejie Li,Guiying Liang,Yanling Wei,Zuoling Fu
The exploration of acquiring excellent thermal performance of luminescence thermometers has become a key focus, owing to their non-contact measurement, high spatial resolution and rapid response. However, many luminescence thermometers still suffer from unsatisfactory relative sensitivity and a single temperature sensing mode. Herein, we report a Lu2CaMg2Ge3O12 garnet structure oxide with a stronger crystal field for ultra-sensitive and multimodal luminescence intensity ratio (LIR) optical thermometry based on the thermally coupled levels (TCLs) of Nd3+ (4F7/2 and 4F3/2) and Er3+ (2H11/2 and 4S3/2), where the relative sensitivity (Sr) can be up to 2.62% K−1 and 1.15% K−1, respectively. Furthermore, the energy level splitting factor Ke, which is used to quantify the energy level splitting extent of the doped ions, is estimated with the help of the dielectric chemical bond theory of complex crystals. As a result of the strong crystal field, the near-infrared (NIR) light-responsive temperature sensing performance of Er3+ (4I13/2) is enabled by the Stark sublevels with the relative sensitivity value of 0.46% K−1. This work not only provides a fresh perspective for developing optical thermometers with outstanding temperature performance, but also provides inspiration for pursuing a multimodal luminescence thermometer.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2025
·Vol. 13
·期 6
·2402515
·
IF 7.2
Ruichen Xu,Biao Zheng,Xiaochen Fang,Xiaolong Sun,Jinquan Hong,Hai Huang,Weiguo Wang,Jun Wang
Multifunctional optical materials with temperature sensing and anti-counterfeiting properties play an essential role in the commercial applications. Herein, Mn 2+ /Nd 3+ co-doped Cs 2 AgInCl 6 (CAIC) lead-free double perovskites (DPs) is synthesized through a hydrothermal method, which exhibits visible to near-infrared (NIR) luminescence and reversible photochromic properties from yellowish to dark purple. The mechanism investigations on the photoluminescence and photochromic phenomena reveal that the incorporation of Mn 2+ ions not only acts as an intermediary in the energy transfer process from the host exciton to Nd 3+ ions, but also plays a pivotal role in the reversible photochromic response. The temperature-dependent luminescence, attributed to the contrasting thermal responses of Mn 2+ and Nd 3+ ions, enables precise temperature sensing via the fluorescence intensity ratio method. In addition, the integration of visible red emission, NIR luminescence, and photochromic properties in a single CAIC: Mn 2+ /Nd 3+ DPs, offers a multilevel anti-counterfeiting strategy. The multifunctional CAIC: Mn 2+ /Nd 3+ DPs would open up new avenues for advanced optical applications, particularly in the realms of temperature sensing and security anti-counterfeiting.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 49
·期 7
·10499-10505
·
IF 5.532
Xiang Yu,Lichen Wang,Ruoshui Liu,Ningfang Zhou,Zhiyi Xu,Huayang Gong,Tongyun Zhao,Jirong Sun,Fengxia Hu,Baogen Shen
We synthesized Sr 1- x Nd x Fe 12- y Co y O 19 ( x = 0–0.25, y = 0–0.1) using a conventional ceramic route. The crystal structures were analyzed using X-ray diffraction. With increasing Nd 3+ and Co 2+ contents, lattice constant a increases, while lattice constant c decreases. In terms of magnetic properties , the saturation magnetization and coercivity are simultaneously increased when x = y = 0.1 (equal co-substitution). This is mainly because the bivalent Co 2+ has a smaller magnetic moment and unquenched orbital moments. When substitution amount x is further increased (unequal co-substitution), the magnetic properties are further improved and reach the optimum values of M s = 76.4 emu/g and H c = 5115 Oe owing to the occupation of the 2 a site by divalent Fe 2+ . The occupancies of Co 2+ and Fe 2+ are further verified using Raman spectroscopy .
研究领域:
材料科学
·
磁学与磁性材料
·
陶瓷学
·
固态化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）