CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jianhai Fu,Qiqing Li,Yuping Jia,Fei Long,Dechao Gan,Chunxu Liu,Wang Wang,Haoran Chen,Xianggui Kong,Dabing Li,Yulei Chang
Ferroelectric Bi 4 Ti 3 O 12 (BIT), with a unique structure and superior ferroelectricity, can distort its lattice under an external electric field. Doping BIT with lanthanide ions (Ln 3+ ) is appealing as their luminescence intensity is sensitive to crystal symmetry changes, allowing effective modulation by an external electric field. However, current research on Ln 3+ -doped BIT primarily focuses on ceramic materials, which pose challenges for heterogeneous integration with devices. In this study, we synthesized Yb 3+ /Er 3+ -doped BIT thin films at various concentrations via the sol-gel method and systematically investigated their ferroelectric and luminescent properties. With a 0.5Yb/0.1Er doping ratio, we successfully achieved real-time, dynamic, and reversible regulation of the upconversion luminescence (UCL) intensity of BIT thin films by applying an external electric field. Furthermore, digitally encoded electrical signals were successfully converted by manipulating UCL emission into visible light intensity variation signals, and we visualized electrical logic and arithmetic operations. These findings offer new possibilities for developing information photonics applications, providing a novel approach to integrating ferroelectric and luminescent properties in thin-film materials for advanced technological applications.
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高影响因子
JOURNAL OF FLUORINE CHEMISTRY
·
2024
·
IF 1.7
Shaohua Wu,Yu Yang,Shuang Wu,Yanhui Dong,Hao Cui,Daguang Li,Weiping Qin
NaLuF 4 :Yb 3+ ,Er 3+ micrometer prismatic crystals are potential materials for the preparation of optical waveguide devices. However, structural defects and OH – groups are generated inside and on their surfaces during growth processes. The structural defects and OH – groups lead to a large depletion of excitation energy and severely quench the downconversion luminescence of Er 3+ . In addition, the Yb 3+ /Er 3+ co-doping ratio significantly affects the downconversion luminescence of the microcrystals, which in turn affects the performance of the optical waveguide amplifiers based on the microcrystals. By adjusting the co-doping ratio of Yb 3+ and Er 3+ in the microcrystals and removing the defects in the crystals, their downconversion luminescence performance was significantly improved. The results showed that the downconversion luminescence under the excitation from a 980 nm laser reached the maximum value when the doping ratio of Yb 3+ and Er 3+ was 20:1.5. In addition, the OH – groups and structural defects in the micrometer crystals were significantly eliminated by ion-exchange and high-temperature annealing treatments, and the crystalline quality was significantly improved. After ion-exchange and high-temperature annealing treatments, the downconversion luminescence enhancement of NaLuF 4 :Yb 3+ ,Er 3+ microcrystals was 2.5 times that of the untreated samples.
研究领域:
材料科学
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光学
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DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2014
·Vol. 14
·期 6
·4139-4146
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IF 1.339
He Enjie,Zheng Hairong,Gao Wei,Tu Yinxun,Lu Ying,Tian Huani,Li Guian
NaYF4:Yb3+, Er3+, Mn2+ nanocrystals with cubic crystal phase were obtained by a facile solvothermal method through doping a proper amount of Mn2+ ions to the nanocrystals. The results of XRD and TEM showed that the as-prepared samples
were well crystallized and their average size was about 25 nm. Under excitations at 978.5 nm and at 532 nm, obvious enhancement and regulation of upconversion and downconversion fluorescence were obtained. Upconversion emission spectra indicate that these effects were independent of doped
concentrations of Er3+ and Yb3+, excitation power, and the excitation wavelength in the current study. It is concluded that the enhancement of fluorescence emissions is mainly due to the change of local symmetry around Er3+ ions, while the regulation of red-to-green
ratios was caused by efficient energy transfer between Er3+ and Mn2+ ions. This kind of upconversion material has a great potential in bioimaging and drug delivery since the excitation and emission falls into the region of “optical window” of biological tissues.
研究领域:
材料科学
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纳米技术
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生物医学工程
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光学
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Kun Ge,Cuimiao Zhang,Wentong Sun,Huifang Liu,Yi Jin,Zhenhua Li,Xing-Jie Liang,Guang Jia,Jinchao Zhang
The rare earth hollow spheres with up-conversion luminescence properties have shown potential applications in drug delivery and bioimaging fields. However, there have been few reports for the degradation properties of rare earth oxide drug carriers. Herein, uniform and well-dispersed Y2O3:Yb3+,Er3+ hollow spheres (YOHSs) have been fabricated by a general Pechini sol–gel process with melamine formaldehyde colloidal spheres as template. The novel YOHSs with up-conversion luminescence has good drug loading amount and drug-release efficiency; moreover, it exhibits pH-responsive release patterns. In particular, the YOHSs sample exhibits low cytotoxicity and excellent degradable properties in acid buffer. After the sample was loaded with anticancer drug doxorubicin (DOX), the antitumor result in vitro indicates that YOHS-DOX might be effective in cancer treatment. The animal imaging test also reveals that the YOHSs drug carrier can be used as an outstanding luminescent probe for bioimaging in vivo application prospects. The results suggest that the degradable drug carrier with up-conversion luminescence may enhance the delivery efficiency of drugs and improve the cancer therapy in clinical applications.
研究领域:
生物医学工程
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纳米医学
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药剂学
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Mingye Ding,Zheyan Shen,Yongjun Yuan,Wangfeng Bai,Chunhua Lu,Zhenguo Ji
β-NaYF 4 :Yb 3+ /Er 3+ nanocrystals embedded transparent glass ceramic has been successfully fabricated by direct incorporation of hydrophilic upconversion nanoparticles (UCNPs) into sol-gel silica glass and subsequent heat treatment. The temperature-sensitive upconversion luminescent behaviors of the as-fabricated UCNPs-silica glass ceramic are systemically investigated in order to investigate its potential application as luminescent thermometric medium. Impressively, benefiting from low-phonon-energy environment, highly UC emission for erbium ions in β-NaYF 4 nanophase and high transparency, good chemical/mechanical stability of the oxide glass matrix, the investigated glass ceramic has superiorities of high relative temperature sensitivity (~ 1.16% K −1 ) and excellent thermal stability for accurate temperature sensing. This preliminary study not only provides a reference for fabricating other transparent bulk glass ceramics containing highly luminescent nanomaterials , but also exploits an effective approach for developing high-performance luminescent thermometers.
研究领域:
材料科学
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光学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Ping Xiao,Song Ye,Huazhen Liao,Deping Wang
In this work, the monodisperse spherical pure β-NaYF 4 :Yb 3+ ,Er 3+ core NCs with average size of 7.2 nm were synthesized by using NaOA as sodium source instead of the conventional NaOH, based on which the sub-20 nm β-NaYF 4 :Yb 3+ ,Er 3+ @NaGdF 4 core-shell NCs with magnetic-optical bifunctional properties were successfully obtained with seed-mediated growth method. The magnetization of the core-shell NCs enhanced proportionally with increased shell thickness, and the maximum upconversion intensity was three orders of magnitude increased in the 18.3 nm NaYF 4 : Yb 3+ ,Er 3+ @NaGdF 4 core-shell NCs compare with the corresponding core NCs. Besides, the upconversion mechanism for the core and core-shell NCs were discussed. This work may lead to an ideal platform for the preparation of sub-20 nm spherical NCs with magnetic and optical properties for application in biomedical imaging and drug delivery.
研究领域:
纳米材料科学
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生物医学工程
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光学材料
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高影响因子
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2019
·Vol. 645
·期 21
·1240-1246
·
IF 1.337
Lu Yuan,Ming Kang,Guanjun Chang,Xiangmeng Lv,Simin Shen,Rong Sun
Due to the unique size effects, nanomaterials in infrared absorption have attracted much attention for their strong absorption in the infrared region. To achieve the infrared multi-band absorption, we propose to synthesize a core-shell structure nanomaterial consisting of NaYF 4 :Yb 3+ , Er 3+ core and a layer of SiO 2 as shell. A series of NaYF 4 :Yb 3+ , Er 3+ nanocrystals were synthesized through hydrothermal method by adjusting the ratio of citric acid(CA)-to-NaOH, and the effects of CA concentration, and NaOH concentration were studied in detail. NaYF 4 :Yb 3+ , Er 3+ @SiO 2 nanoparticles were synthesized by sol-gel method using TEOS as silica source. The results show that the core-shell NaYF 4 :Yb 3+ , Er 3+ @SiO 2 nanoparticles were successfully synthesized. Up-conversion spectra of these nanoparticles were recorded with 980 nm laser excitation under room temperature. There are no changes of the emission centers of nanoparticles before or after silica coating, but the emission intensities of nanoparticles after silica coating are weakened. Furthermore, the property of infrared multi-band absorption was tested through ultraviolet-visible-near infrared spectrophotometer and infrared absorption spectra. The results illustrate that the multi-band infrared absorption nanomaterial was successfully synthesized.
研究领域:
材料科学
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纳米技术
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光学
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DOI
高影响因子
CRYSTENGCOMM
·
2013
·Vol. 15
·期 19
·3919-3924
·
IF 3.879
Suli Wu,Yanhui Ning,Jie Chang,Wenbin Niu,Shufen Zhang
Oleic acid together with sodium hydroxide (NaOH) was widely used to control the size, phase and morphology of NaYF4 UCNCs. However, reports are scarce about the modulation of the luminescence intensity and color output of NaYF4 UCNCs by using different amounts of NaOH. Here, we synthesized NaYF4:Yb3+, Er3+ nanocrystals by a hydro/solvent thermal method using oleic acid as ligand with different amounts of NaOH and systematically investigated their upconverted fluorescence spectra. The results indicated that the emission intensity of NaYF4 : Yb3+,Er3+, especially the green emission at 540 nm was dramatically increased as NaOH decreased. The enhancement factors of 540 nm emissions were 48, 42 and 32 for samples prepared with 0 g, 0.2 g and 0.4 g NaOH (the corresponding pH of the reaction solution were 5.9, 6.9 and 7.4), respectively, compared with that of the product prepared with the usually used 0.7 g NaOH (the corresponding pH was 8.3). Importantly, the ratio of green to red (RGR) increased from 0.4 to 5.9 when the pH decreased from 8.3 to 5.9. That is to say, the color output was tuned from orange yellow to nearly pure green. This resulted from the high energy vibration of OH−, which led to nonradiative relaxation from green emission levels (2H11/2 and 4S3/2) to the red emission level (4F9/2) and nonradiative relaxation from the red emission level (4F9/2) to the no emission level (4I11/2) of Er3+.
研究领域:
材料科学
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光学
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DOI
高影响因子
Journal of Physical Chemistry C
·
2015
·
IF 4.772
Yan Song,Guixia Liu,Xiangting Dong,Jinxian Wang,Wensheng Yu,Jingmei Li
Multifunctional nanomaterials possessing upconversion luminescence, magnetic, and photothermal properties show promising applications in biology and medicine. In this study, a new kind of luminescent-magnetic-thermal core–shell hybrid nanocomposite was fabricated combining rare earth Yb3+ and Er3+ ions doped NaGdF4 nanocrystals as shell layer materials and gold nanorods (AuNRs) as cores. The structure, morphology, composition, and properties of the multifunctional hybrid nanocomposites were characterized by X-ray powder diffraction, transmission electron microscopy, energy dispersive spectroscopy, upconversion photoluminescence spectra, vibrating sample magnetometer, sensitive thermometer, and cytotoxicity assessment, respectively. The multifunctional hybrid nanocomposites have rodlike morphology and core–shell structure. The uniform NaGdF4/Yb3+,Er3+ shell with a thickness of around 4.5 nm was coated on the surface of AuNRs with a length of 40 nm and a diameter of 12 nm. The AuNRs@NaGdF4/Yb3+,Er3+ multifunctional nanocomposites provide an excellent upconversion emission under excitation at 980 nm and a superparamagnetic behavior with magnetic susceptibility of 8.0 × 10–5 emu·g–1·Oe–1 at 300 K and saturation magnetization value of 102 emu·g–1 at 2 K. More significantly, when AuNRs@NaGdF4/Yb3+,Er3+ aqueous suspensions of 100 μg·mL–1 were irradiated by a 980 nm NIR laser for 10 min, the temperature was significantly elevated to 48 °C. At the same time, the temperature of photothermal transduction can be easily controlled by adjusting the concentration of nanocomposites. Preliminary investigation of incubating with HeLa cells displays that the multifunctional nanocomposites exhibit a good biocompatibility. Moreover, the nanocomposites may be effectively utilized for bioimaging and photothermal therapy in living cells.
研究领域:
生物医学工程
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纳米材料科学
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高影响因子
RSC Advances
·
2014
·Vol. 5
·期 10
·7773-7780
·
IF 3.708
Junping Zhang,Fuyao Liu,Tao Li,Xiuxia He,Zhenxin Wang
Taking advantage of the unique optical properties of upconversion nanoparticles (NP) and the feasibly modified nature of SiO2, NaYF4:Yb3+, Er3+@SiO2 core@shell (UCNP@SiO2) NPs with excellent morphology have been synthesized to investigate the surface charge effect on the interactions of NPs with cells. The cellular uptake behaviors, cytotoxicities and intracellular metal ion release of the as-prepared NPs have been investigated in two cell lines (HeLa and HepG-2) by fluorescence microscopy, MTT assay and inductively coupled plasma mass spectrometry (ICP-MS), respectively. It is found that the UCNP@SiO2 NPs with positive surface charge have much higher cell internalization ability and cytotoxicity than those with negative surface charge. The experimental results also demonstrate that the cytotoxicity of UCNP@SiO2 NP is closely related to the increase of intracellular reactive oxygen species (ROS) and metal ion release of internalized NPs.
研究领域:
纳米技术
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细胞生物学
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材料科学
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毒理学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 16
·4025-4033
·
IF 5.256
Meihong Liu,Ming Gu,Yue Tian,Ping Huang,Lei Wang,Qiufeng Shi,Cai’e Cui
In this paper, an electrospinning technique was developed to prepare CaSc2O4:Yb3+/Er3+ one dimensional (1D) nanofibers for the first time. X-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy and nitrogen adsorption/desorption were utilized to characterize the structure and morphology of the as-prepared nanofibers, indicating that single phase mesoporous CaSc2O4:Yb3+/Er3+ 1D nanofibers with a uniform size and morphology can be prepared via the electrospinning technique. The as-prepared CaSc2O4:Yb3+/Er3+ 1D nanofibers exhibit strong UCL under the excitation of 980 nm. The cross-relaxation (4S3/2 + 4I15/2 → 4I9/2 + 4I13/2) and energy back transfer (4S3/2 + 4F7/2 → 4I13/2 + 4F5/2) processes are found to be responsible for the concentration-dependent UCL properties, confirmed by rate equation modeling. Optical thermometry in the temperature range of 298–623 K was recorded using the FIR technique with two green UC emissions in the as-prepared CaSc2O4:Yb3+/Er3+ 1D nanofibers. The dependence of the sensitivity on the doping concentration of the Yb3+ and Er3+ ions is found. The above results suggest that the as-prepared CaSc2O4:Yb3+/Er3+ 1D nanofibers have great potential for the applications of drug delivery and optical thermometers.
研究领域:
材料科学
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光学
·
纳米技术
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DOI
高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 8
·1675-1684
·
IF 5.066
M. Wu,E. H. Song,Z. T. Chen,S. Ding,S. Ye,J. J. Zhou,S. Q. Xu,Q. Y. Zhang
Single-band red upconversion (UC) emission of Er3+ has been successfully achieved in Yb3+/Er3+ codoped KMgF3 nanocrystals via a nonequivalent substitution strategy, in which lanthanide ions probably aggregate, as evidenced by density functional theory calculations and upconversion dynamic processes. The aggregation of Yb3+/Er3+ would cause large cross-relaxation probabilities among the lanthanide ions when photo-excited, resulting in the disappearance of the green emission and the population of the red emitting level of Er3+. Interestingly, the single-band feature is independent of the dopant concentration and pump power. The possible UC mechanism is discussed in detail according to nanocrystal morphology, ion radii, lattice parameters and decay lifetime studies of the Yb3+–Er3+ doped analogous compounds (KMgF3, KZnF3 and KCdF3). It could be concluded that Yb3+/Er3+ ions tend to aggregate in KMgF3, resulting in the largest ratio of red to green UC emission. This research may give a perspective toward tuning the UC emission of lanthanide ions.
研究领域:
材料科学
·
光学
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DOI
高影响因子
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