CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Chaoyue Peng,Lifang Yuan,Geng Chen,Haoyi Wu,Yahong Jin
The advance of portable and smart near-infrared (NIR) light sources has sparked significant interest. However, achieving high-performance NIR emission at longer wavelengths remains a formidable challenge. In this study, we prepared broadband NIR phosphors by codoping pyrochlore oxide Y 2 GaSbO 7 (YGSO) with Cr 3+ and Yb 3+ ions using a conventional high-temperature solid-state reaction. Upon excitation by blue light, YGSO: 0.03Cr 3+ exhibited a broadband NIR emission centered at 765 nm with a full width at half maximum (FWHM) of 160 nm. The purposeful incorporation of Yb 3+ ions facilitated efficient energy transfer from Cr 3+ to Yb 3+ , resulting in a newly observed NIR emission peak at 970 nm. Notably, the addition of Yb 3+ improved the overall thermal quenching resistance owing to its inherent thermal stability. Furthermore, we encapsulated the as-obtained phosphors with commercial blue LED chips to create prototype phosphor-converted light-emitting diodes (pc-LEDs). The Cr 3+ and Cr 3+ -Yb 3+ codoped pc-LEDs achieved output powers of 120 mW@660 mA with a photoelectric conversion efficiency of 12.66%@30 mA, and 131.7 mW@1020 mA with a photoelectric conversion efficiency of 13.93%@30 mA, respectively. These broadband NIR pc-LEDs hold promise for optical imaging applications.
研究领域:
材料科学
·
光学
·
光子学
·
固态照明
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2022
·
IF 5.6
Huazhen Liao,Song Ye,Jingxin Ding,Jianzhong Yu,Xinling Xv,Ling Pan,Peixuan Lin,Deping Wang
Enabling the drug delivery systems with drug release monitoring function is of essential importance to enhance therapeutic effectiveness. Herein, we took a ship-in-a-bottle synthesis strategy to construct the upconversion nanocrystal and zeolite compounded drug delivery system with real-time monitoring function, by using desilicated ZSM-5 zeolite as drug carrier and NaYF 4 : Yb 3+ /Tm 3+ nanocrystal as luminescent probe. Benefiting from the enlarged mesoporous in desilicated ZSM-5, the NaYF 4 : Yb 3+ /Tm 3+ nanocrystals can be successfully loaded inside and the upconversion emission intensity of Tm 3+ under 980 nm excitation was one order of magnitude enhanced after mild heat treatment. The drug release monitoring function were studied by using doxorubicin as model drug, the experimental results indicated that the upconversion emission intensity ratio of I 802nm /I 475nm can accurately evaluate drug release percentage. Further in vitro cytotoxicity evaluation suggested the doxorubicin-loaded [email protected] /DS/HT has excellent biocompatibility and is able to inhibit tumor cells effectively.
研究领域:
材料科学
·
纳米技术
·
药物递送系统
·
生物医学工程
✓ 已验证
DOI
高影响因子
BIOMATERIALS
·
2015
·
IF 8.557
Xiaoran Deng,Yunlu Dai,Jianhua Liu,Ying Zhou,Ping'an Ma,Ziyong Cheng,Yinyin Chen,Kerong Deng,Xuejiao Li,Zhiyao Hou,Chunxia Li,Jun Lin
Combining the multi-modal medical imaging with cancer therapy in one single system has attracted the great interests for theranostic purpose. In this paper, CaF 2 :Yb 3+ /Er 3+ /Mn 2+ -poly(2-Aminoethyl methacrylate) (UCHNs-PAMA) hybrid microspheres were successfully fabricated. The synthetic route to the nanocomposite based on a facile hydrothermal method for fabrication of hollow upconversion (UC) nanospheres at first and then post-filling the PAMA interiorly through photo-initiated polymerization. The UCHNs showed orange fluorescence under 980 nm near infrared (NIR) laser excitation , which provided the upconverting luminescence (UCL) imaging modality . Meanwhile, the presence of functional Mn 2+ and Yb 3+ offered the enhanced T 1 -weighted magnetic resonance (MR) and computed tomography (CT) imaging, respectively. Thanks to introducing amine groups-containing PAMA inside the hollow nanospheres, the Pt(IV) pro-drug, c,c,t-Pt(NH 3 ) 2 Cl 2 (OOCCH 2 CH 2 COOH) 2 (DSP), can be conveniently bonded on the polymer network to construct a nanoscale anti-cancer drug carrier. The UCHNs-PAMA-Pt(IV) nanocomposite shows effective inhibition for Hela cell line via MTT assay . In contrast, Pt(IV) pro-drug and UCHNs-PAMA microspheres behave little cytotoxicity to Hela cells. This should be attributed the fact that the anti-cancer ability can be recovered only when Pt(IV) pro-drug was reduced to Pt(II)-drug in cellular environment. Furthermore, the in vivo experiments on small mice also confirm that the hybrid microspheres have relatively low toxic side effects and high tumor inhibition rate. These findings show that the multifunctional hybrid microspheres have potential to be used as UCL/MR/CT tri-modal imaging contrast agent and anti-cancer drug carriers.
研究领域:
纳米医学
·
生物材料
·
癌症治疗
·
医学影像学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTAL GROWTH & DESIGN
·
2024
·
IF 3.2
Chuancheng Zhang,Shoujun Ding,Wenzhi Su,Miaomiao Wang,Haitang Hu,Yong Zou,Wenpeng Liu,Qingli Zhang
Inhomogeneous broadening in disordered crystals has been widely recognized as a successful approach to enhance the spectral bandwidth of rare earth ions in optical spectra, and the Yb3+-doped mixed laser crystals are known as ultrafast pulse materials and have emerged as a hotspot recently. In this study, mixed sodium gadolinium/lanthanum double molybdate disordered laser crystals NaGd(1–x)La(x)(MoO4)2 with x = 0.3, 0.5, and 0.9 were grown by the Czochralski (Cz) method. The structure of as-grown crystals was investigated by XRD, SEM, FT-IR, and Raman experiments. The spectroscopic properties, including absorption, emission, and fluorescence decay characteristics, were investigated thoroughly. The NaGd0.5La0.5(MoO4)2 (NGLM) composite crystal exhibited an exceptionally broad absorption which reaches 70 nm (fwhm) at 980 nm, exceeding those of NaGd(MoO4)2 (NGM) and NaLa(MoO4)2 (NLM). Additionally, the electronic structures (band structure and density of states) of NGM, NGLM, and NLM were determined from the first-principles method combined with the PBE function. The calculations of defect formation energies under O-poor and O-rich conditions demonstrate that the +2 defects are easily generated in the undoped NGM crystal prepared under reducing atmospheres, and the calculation of absorption properties reveals that the black color of NGM without annealing is mainly attributed to intraband transitions between defect induction states and VBM or CBM. Moreover, the lifetimes of excited energy level 2F5/2 of Yb3+ were examined under different experimental environments to obtain the intrinsic radiative lifetime, and the emission cross section was calculated as 2.25 × 10–20 cm2 at 1016 nm. The features of the Yb3+:NaGd(1–x)La(x)(MoO4)2 crystal indicate the potential applications for ultrafast and broad tunable laser through slight regulation of the composite engineering strategy.
研究领域:
材料科学
·
光学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Tianzhi Jiang,Renguang Ye,Xinfeng Jin,Weigang Guo,Xiaoqing Liu,Shilong Zhao,Junjie Zhang,Shiqing Xu
Realization and optimization of enhanced/tunable optical luminescence properties is highly demanded for reliable and accurate temperature sensing. In this work, uniform monodisperse spherical Er 3+ /Yb 3+ co-doped Y 2 O 3 microcrystals of four different sizes have been synthesized via homogeneous precipitation by changing the reaction time, and the tuning of luminescence intensity/color was achieved by the controllable particles size. On this basis, by studying the particle size dependence of temperature sensing performance, we found that the behavior of absolute sensitivity ( S a ) and relative sensitivity ( S r ) have highly size dependence. Interestingly, when different FIR strategies were used (thermally coupled levels (TCLs) and nonthermally coupled levels (non-TCLs)), the sensitivity exhibits the opposite behavior. Importantly, when using the non-TCLs strategy, the maximum S a value for the smallest phosphors was 1.084 K -1 , leading to ∼246 times improvement compared to TCLs-based S a . The ultrahigh S a indicated that the Er 3+ /Yb 3+ co-doped Y 2 O 3 phosphors have potential in temperature detection, and the results are of guiding significance to studying the sensitivity of Y 2 O 3 particle size-dependent temperature measurement.
研究领域:
材料科学
·
光学
·
纳米技术
·
温度传感
✓ 已验证
DOI
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
·
细胞生物学
·
材料科学
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2020
·Vol. 103
·期 10
·5664-5677
·
IF 3.502
Yao Ji,Yongbao Xiao,Shujing Huang,Weichao Wang
Fluoro-sulfo-phosphate (FPS) glass is of current interest as potential material for laser application due to its good glass-forming ability, thermal, and chemical stability as well as the complicated local environment for incorporated species. Herein, the physical and luminescent properties of Er 3+ and Yb 3+ /Er 3+ -doped FPS glasses vs S/F ratio are investigated comprehensively. The low melting temperature (750°C) leads to fewer ingredients evaporation and easier operation. The sulfate addition depolymerizes the structure of FPS glasses, leading to either monotonic or nonmonotonic variations of physical properties, while no deterioration in thermal and limited one in chemical stability is caused. The addition of sulfate also modifies the local structure around optical active species and thus, leading to higher emission cross section (1.52 × 10 −20 cm 2 ), effective linewidth (68.4 nm), figure of merit (5.61 × 10 −23 s cm 2 ), gain bandwidth (102.44 × 10 −27 cm 3 ), and energy-transfer microparameters (51.87 × 10 −39 cm 6 /s), implying high possibility to serve as 1.5 μm laser application.
研究领域:
材料科学
·
光学
·
激光物理
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2013
·
IF 4.187
Ziyong Cheng,Ruitao Chai,Pingan Ma,Yunlu Dai,Xiaojiao Kang,Hongzhou Lian,Zhiyao Hou,Chunxia Li,Jun Lin
Bilayer thermosensitive P(NIPAm-co-AAm) hydrogel discs were prepared by a facile UV light initiation process from N-isopropylacrylamide (NIPAm) and acrylamide (AAm) monomers’ cross-linking copolymerization. Poly(ethylene glycol) (PEG) as a pore-forming agent was added in order to form a porous structure and improve the water content in the hydrogel. Functional materials of NaYF4:Yb3+/Er3+ nanoparticles and multiwalled carbon nanotubes (MWCNTs) were incorporated into different layers of the P(NIPAm-co-AAm) hydrogel for the purpose of up-conversion luminescence labeling and the NIR light antenna effect, respectively. Significantly improved drug release from composite hydrogels was achieved in response to 980 nm NIR light irradiation by using lysozyme as a macromolecular drug. The multifunctional hydrogel reported here provides a platform for simultaneous NIR luminescence labeling and NIR-driven drug release.
研究领域:
材料科学
·
生物医学工程
·
纳米医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 24
·10435-10452
·
IF 3.553
Zhang Kailian,Zhou Man,Yu Changlin,Yang Kai,Li Xiaoxiao,Yang Shi,Guan Jie,Dai Wenxin,Huang Weiya
Wide spectral responsive photocatalysts are of great importance for making full use of solar energy and broad application in highly efficient photocatalytic wastewater treatment, production of H 2 O 2 , etc. Thereinto, it is significative to open an appropriate way to extend the absorption to the NIR region, in which it accounts for ~ 49% in the solar spectrum. In this work, we synthesized successfully the new-style NaYF 4 :Yb 3+ , Er 3+ /Ag 2 CrO 4 photocatalyst via the hydrothermal and followed precipitation method, and it exhibited the more excellent photocatalytic performances than Ag 2 CrO 4 for the photocatalytic H 2 O 2 production and disposals of pollutants, such as methyl orange (MO), methylene blue (MB), rhodamine B (RhB) and tetracycline (TCs). The morphological, structural and optical behavior were investigated by XRD, SEM, N 2 adsorption/desorption, TEM, XPS, UV–Vis DRS, UC luminescence and photoelectrochemical experiments. It revealed that NaYF 4 :Yb 3+ , Er 3+ /Ag 2 CrO 4 photocatalyst presented stronger absorptive capacity in the visible–NIR region by the benign fluorescence resonance energy transfer (NaYF 4 :Yb 3+ , Er 3+ can convert near-infrared light to visible light via upconversion process), and showed more efficient charge transfer and separation than that of pure Ag 2 CrO 4 . The primary reactive species of ·O 2 − and h + by the trapping experiments played a considerable important role in the photocatalytic process. A promising potent system was suggested for the highly efficient utilization of sunlight in the enhancement of photocatalytic activities.
研究领域:
材料科学
·
环境科学
·
光化学
·
太阳能利用
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Mianhong Chen,Hua Fan,Zuizhi Lu,Jiayang Song,Xinguo Zhang,Qi Pang,Peican Chen,Liya Zhou
Stable and efficient broadband near-infrared (NIR) emitting phosphors are vital for the next-generation NIR sources. However, it still remains challenging to construct such phosphors, particularly those with a NIR-II window. In this work, using the Cr 3+ -Yb 3+ energy transfer (ET) strategy, the as-synthesized Ca 2 ScTaO 6 :Cr 3+ , Yb 3+ phosphor retains 86.2% of the initial luminescence intensity of Yb 3+ at 373 K with characteristic emissions of both activators ranging from 700 nm to 1200 nm. The occupation of Cr 3+ into both Ta 5+ and Sc 3+ sites is confirmed by X-ray diffraction, time-resolved emission spectrum, and crystal structure. The efficient ET from Cr 3+ to Yb 3+ is revealed by the diffuse reflection spectrum, steady-state and transient fluorescence. As a result, it contributes to the excellent performance of the phosphor. Based on the optimized phosphor, a NIR light-emitting diode is fabricated and demonstrated its advantage in imaging and potential application in information encryption. The result highlights ET as a robust strategy to construct efficient NIR phosphor.
研究领域:
材料科学
·
光学
·
光子学
·
固体物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Panying Jiang,Haoqiang Zhang,Yanni Lang,Rongze Ma,Dan Wu,Liang Xu,Aning Ma,Yongjin Li,Dacheng Zhou,Zhiguo Song,Yugeng Wen,Yong Yang,Jin Han,Jianbei Qiu
A series of chiral nanostructured bismuth bromide doped with Er 3+ , Yb 3+ (D-BYE) phosphors were synthesized using a solvothermal method followed by an air annealing strategy. The upconversion luminescence (UCL) spectra were also recorded under 980 nm laser excitation in the temperature range from 295 to 565 K. The UCL intensity of D-BYE is about 34 times higher compared to the achiral nanostructured bismuth bromide doped with Er 3+ , Yb 3+ (A-BYE) phosphor. Optical temperature sensing of phosphors was achieved by evaluating the temperature sensing behavior using thermally coupled (TCLs) or non-thermally coupled (NTCLs) levels of Er 3+ . Impressively, the maximum relative sensitivity (S R ) value of the D-BYE phosphor was 1.32% K -1 using the NTCLs method, which is about 1.6 times higher than the sensitivity of the TCLs-based method (0.86% K -1 ). The results of this work demonstrate the great potential of D-BYE phosphors for optical temperature sensing.
研究领域:
材料科学
·
纳米技术
·
光学传感
·
发光材料
·
光子学
✓ 已验证
产品关联
DOI
高影响因子
BIOMATERIALS
·
2012
·
IF 7.404
Zhen Liu,Fang Pu,Sa Huang,Qinghai Yuan,Jinsong Ren,Xiaogang Qu
Due to their unique electric, magnetic, and optical properties, engineered nanostructures have been applied to provide diagnostic, therapeutic, as well as prognostic information about the status of disease. In this study, we report a multifunctional nanoprobe based on PEGylated Gd 2 O 3 :Yb 3+ , Er 3+ nanorods (denoted as PEG-UCNPs) for in vivo up-conversion luminescence (UCL), T 1 -enhanced magnetic resonance (MR), and X-ray computed tomography (CT) multi-modality imaging. A facile and large-scale hydrothermal system combining the merits of an in situ thermal decomposition method and a surface-modified approach is introduced to construct high-quality PEG-UCNPs. By grafting PEG molecules on the surface of PEG-UCNPs, the nanostructures possess excellent stability against in vivo environment and hold long blood circulation time. Cell-cytotoxicity assay, hemolyticity, as well as post-injection histology, hematology, and inflammation analysis further demonstrate their non-cytotoxic character and indicate further in vivo application. In detail, the capability of PEG-UCNPs as high-performance contrast agents for UCL/MR/CT imaging is evaluated successfully through small-animal experiments. Additionally, pharmacokinetics, biodistribution, and clearance route are studied after intravenous injection in a mouse model, reflecting their overall safety.
研究领域:
纳米技术
·
材料科学
·
生物医学工程
·
医学影像
·
分子诊断
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）