DALTON TRANSACTIONS
·
2024
·
IF 3.5
Hang Liu,Haozhou Tian,Chunhui Sun,Qiang Wang,Hongqun Zhu,Xuezhong Yang,Haoran Wang,Yuhong Zhang
A series of Nd3+/Yb3+ co-doped Ca2LaTaO6 (CLTO) phosphors are synthesized by a high temperature solid phase method. Structural characterization confirms the successful incorporation of Nd3+ and Yb3+ ions into the CLTO host lattice. The photoluminescence excitation (PLE) spectra and photoluminescence (PL) spectra of CLTO:Nd3+ and CLTO:Nd3+/Yb3+ are investigated in detail. Under the excitation of ultraviolet (UV) and visible (VIS) light, the CLTO:Nd3+/Yb3+ phosphor emits broadband near infrared (NIR) luminescence. In particular, the luminescence intensity of the Yb3+ ion is increased through an energy transfer (ET) process from Nd3+ to Yb3+. The luminescence mechanism of the CLTO:Nd3+/Yb3+ sample is analyzed based on the decay lifetime and PL spectra. In addition, the NIR emission intensity of Yb3+ ions is also enhanced by doping K+ ions. The broadband luminescence (850–1050 nm) of the CLTO:Nd3+/Yb3+/K+ phosphor has good application in solar cells and anti-counterfeiting.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Hongyu Lu,Yang Lu,Difan Lin,Jiang Zhu,Yangyang Du,Hua Zou
Luminescent materials usually suffer from thermal quenching at high temperature due to the aggravation of nonradiation relaxations. Herein, a giant enhancement of up conversion (UC) luminescence is observed in negative thermal expansion (NTE) Y 2 W 3 O 12 :Nd phosphor upon increasing the temperature from 310 to 790 K. In addition, the temperature-dependent UC emission is reversible. To penetrate into the mechanisms, the temperature-dependent luminescence intensity and lifetime are investigated for Nd doped negative and positive thermal expansion (PTE) phosphors. Based these investigation, we infer that the underlying mechanism of the giant enhancement for Y 2 W 3 O 12 :Nd phosphor are due to combined effects of phonon assisted absorptions and contraction of NTE crystals. Moreover, the observation of temperature-dependent near-infrared spectra (NIR) can support the mechanism from the other side. The present findings pave the way to overcome thermal quenching of Nd 3+ ions and explore new thermal enhancement materials sensitized by Nd 3+ ions.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Zhousu Xu,Yijian Yang,Peng Wang,Xiaofeng Liu,Jianrong Qiu
Nd 3+ co-doped CsPbBr 3 perovskite quantum dots (PQDs) glasses were prepared by conventional melt-quenching followed by a thermal treatment process. With the introduction of Nd 2 O 3 to the parent glass, the optical properties of the CsPbBr 3 PQDs are significantly improved. The energy transfer from CsPbBr 3 PQDs to Nd 3+ ions was investigated and confirmed by excitation and emission spectra. The results show that visible excitation band width for the near-infrared (NIR) emission of Nd 3+ ions is significantly increased in the presence of PQDs. The strategy for modulation of the optical properties by the energy transfer between rare earth ions and PQDs in the glass matrix could be further utilized for spectral engineering of photonic glasses for optoelectronic applications.
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
IONICS
·
2021
·Vol. 27
·期 6
·2707-2715
·
IF 2.817
Zhang Ziqi,Zhang Yan,Liu Yang,Zhang Siqi,Yao Kaida,Sun Yueqiu,Wang Xiangzhi,Huang Weimin,Liu Xiaobo
Metal-organic frameworks are well-aligned nanoporous crystals which can be applied to biomedical field, thanks to the large superficial area, ordered pores array, and biocompatible metallic ion composition. In this work, we fabricated a novel Nd 3+ ion-doped ZIF-8 since there are some reports showing that Nd 3+ has anti-carcinogenic properties and can be used for therapeutic application in aberrant angiogenesis recently. Therefore, we attempted to use electrochemical anodic oxidation and electrochemical in situ deposition techniques to produce coating which contains Nd 3+ on Ti implant. And then we detected the biotoxicity, antibacterial function, and corrosion resistance of this new coating so as to facilitate further research on Nd 3+ ion implantation in vivo. SEM and TEM were applied to observe the surface morphology. N 2 adsorption–desorption was used to investigate the specific surface area and pore structure. The XRD and XPS were carried out to investigate the compound surface including the chemical composition and element-bonding configurations. The corrosion resistance properties of the samples were tested by electrochemical method. ICP was conducted to investigate the release behavior.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Guotao Xiang,Menglin Yang,Yongxi Ding,Hongxiu Wu,Lu Yao,Yongjie Wang,Xianju Zhou,Li Li,Li Ma,Xiaojun Wang,Jiahua Zhang
Accurate and real-time temperature detection is an urgent requirement in photothermal therapy (PTT). In this work, the CaSc 2 O 4 : Nd 3+ nanorod with an average length of 150 nm has been determined to be an outstanding optical thermometer based on the fluorescence intensity ratio ( FIR ) of thermally coupled Stark sublevels of Nd 3+ : 4 F 3/2 → 4 I 11/2 transition, of which the excitation and emission wavelength are located in the first and second biological window respectively, resulting in an 8 mm penetration depth in the biological tissues. The maximal absolute sensitivity and relative sensitivity as well as the minimal temperature resolution of the present sample is 0.0008 K -1 , 0.0018 K -1 and 0.19 K respectively, which is superior to the vast majority of the same type thermometers. Besides that, the nanorods show a 7 K temperature increment after 180 s’ 808 nm-laser radiation, revealing its photothermal conversion capacity thanks to the considerable nonradiative relaxation processes among the metastable energy levels of Nd 3+ . These results indicate that Nd 3+ single-doped CaSc 2 O 4 nanorods can be utilized as the optical thermometer in the deep-tissue PTT process for real-time thermometry along with the function of light-to-heat conversion.
研究领域:
生物医学工程
·
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
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
Nanoscale
·
2014
·Vol. 6
·期 24
·14799-14809
·
IF 6.739
Ruichan Lv,Guixin Yang,Fei He,Yunlu Dai,Shili Gai,Piaoping Yang
In this report, uniform LaF3:Ln mesoporous spheres have been synthesized by a facile and mild in situ ion-exchange method using yolk-like La(OH)3:Ln mesoporous spheres as templates, which were prepared through a self-produced bubble-template route. It was found that the structures of the final LaF3:Ln can simply be tuned by adding a polyetherimide (PEI) reagent. LaF3:Ln hollow mesoporous spheres (HMSs) and LaF3:Ln flower-like mesoporous spheres (FMSs) were obtained when assisted by PEI and in the absence of PEI. The up-conversion (UC) luminescence results reveal that the doping of Nd3+ ions in LaF3:Ln can markedly influence the UC emissions of the products. It is interesting that an obvious thermal effect is achieved due to the energy back-transfer from Tm3+ to Nd3+ ions under 980 nm near-infrared (NIR) irradiation. The LaF3:Yb/Er/Tm/Nd HMSs show good biocompatibility and sustained doxorubicin (DOX) release properties. In particular, upon 980 nm NIR irradiation, the photothermal effect arising from the Nd3+ doping induces a faster DOX release from the drug release system. Moreover, UC luminescence images of LaF3:Yb/Er/Tm/Nd HMSs uptaken by MCF-7 cells exhibit apparent green emission under 980 nm NIR irradiation. Such a multifunctional carrier combining UC luminescence and hyperthermia with the chemotherapeutic drugs should be of high potential for the simultaneous anti-cancer therapy and cell imaging.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
·
癌症治疗
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2018
·Vol. 29
·期 9
·094001
·
IF 3.404
Zengliang Shi,Yue Duan,Xingjun Zhu,Qiwei Wang,DongDong Li,Ke Hu,Wei Feng,Fuyou Li,Chunxiang Xu
Lanthanide-doped up-conversion nanoparticles (UCNPs) provide a remote temperature sensing approach to monitoring biological microenvironments. In this research, the UCNPs of NaYF4:Yb3+, Er3+@NaYF4:Yb3+, Nd3+ with hexagonal (β)-phase were synthesized and applied in cell temperature sensing as well as imaging after surface modification with meso-2, 3-dimercaptosuccinic acid. In the core–shell UCNPs, Yb3+ ions were introduced as energy transfer media between sensitizers of Nd3+ and activators of Er3+ to improve Er3+emission and prevent their quenching behavior due to multiple energy levels of Nd3+. Under the excitations of 808 nm and 980 nm lasers, the NaYF4:Yb3+, Er3+@NaYF4:Yb3+, Nd3+ nanoparticles exhibited an efficient green band with two emission peaks at 525 nm and 545 nm, respectively, which originated from the transitions of 2H11/2 → 4I15/2 and 4S3/2 → 4I15/2 for Er3+ ions. We demonstrate that an occurrence of good logarithmic linearity exists between the intensity ratio of these two emission peaks and the reciprocal of the inside or outside temperature of NIH-3T3 cells. A better thermal stability is proved through temperature-dependent spectra with a heating–cooling cycle. The obtained viability of NIH-3T3 cells is greater than 90% after incubations of about 12 and 24 (h), and they possess a lower cytotoxicity of UCNPs. This work provides a method for monitoring the cell temperature and its living state from multiple dimensions including temperature response, cell images and visual up-conversion fluorescent color.
研究领域:
纳米技术
·
生物物理学
·
细胞生物学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）