Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 6
·2375-2388
·
IF 6.4
Shaoshan Su,Wei Song,Hongli Wen,Zhurong Mo,Tonghua Wan,Lin Yu,Weiren Zhao,Deshmukh Abdul Hakeem
KYb2F7 nanocrystals have stimulated extensive research interest due to their unique structure and tunable upconversion (UC) properties for the development of different technological applications. Herein, the controlled synthesis of KYb2F7:Er3+ nanocrystals for precise control over the crystal phases and morphologies was realized by varying the KF dose and reaction time via a facile hydrothermal method. Upon 365 nm excitation, the downconverted red emission of the KYb2F7:Er3+ nanocrystals pre-excited with the 980 nm laser was significantly enhanced. By manipulating the KYb2F7:Er3+ host structure via substitution of cations such as Ca2+, Ti4+, Si4+, Ge4+, Y3+, and Nd3+ for Yb3+ with optimized concentrations, the thermometric properties of KYb2F7:Er3+ were greatly improved. The substitution of Ti4+, Ge4+, and Y3+ has significantly improved the SR (for Ti4+ both SA and SR are improved). The highest SA (0.0028 K−1) and SR (1158/T2 K−1) were obtained for KYb1.8Ti0.15F7:Er3+ and KYb1.8Ge0.15F7:Er3+, respectively. The mechanistic investigations revealed that the green and red UC emissions resulted from the three- and two-photon process, respectively. We believe that the substitution strategy could be a powerful tool for enhancing the thermometric properties of luminescent materials.
研究领域:
材料科学
·
纳米技术
·
光学材料
·
温度测量
✓ 已验证
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
CRYSTENGCOMM
·
2022
·Vol. 24
·期 9
·1752-1763
·
IF 3.756
Mingzhou Meng,Rui Zhang,Xinmeng Fa,Jianghua Yang,Zhenlong Cheng,Anees A. Ansari,Jun Ou,Christian Wurth,Ute Resch-Genger
A series of NaYF4:Yb3+/Tm3+@NaYF4:Yb3+/Er3+ nanoparticles doped with Tm3+ and Er3+ were successfully prepared by the solvothermal method. Under 980 nm laser excitation, intense upconversion emission peaks of Tm3+ and Er3+ were observed for all samples. By doping Tm3+ and Er3+ with core–shell partitioning, not only a significant increase in fluorescence intensity could be achieved, but also simultaneous temperature measurements on multiple thermocouple energy levels could be realised. In addition, the temperature sensing performance of different thermocouple energy levels was also investigated, and it was found that the 3F3 → 3H6 and 1G4 → 3F4 thermocouple energy level pairs of Tm3+ were the best, with maximum absolute sensitivity and maximum relative sensitivity of up to 0.0250 K−1 and 2.155% K−1 respectively, higher than the sensitivity of other thermocouple energy levels. It has a temperature resolution of less than 0.0139 K, which is lower than that of most materials available today. By using this material as a probe to build a fiber optic temperature sensor platform, it was found to have reliable temperature measurement performance.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
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
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-12
·
IF 4.259
Zhang Yanqiu,Chen Baojiu,Xu Sai,Li Xiangping,Zhang Jinsu,Sun Jiashi,Zheng Hui,Tong Lili,Sui Guozhu,Zhong Hua,Xia Haiping,Hua Ruinian
To realize photothermal therapy (PTT) of cancer/tumor both the photothermal conversion and temperature detection are required. Usually, the temperature detection in PTT needs complicated instruments, and the therapy process is out of temperature control in the present investigations. In this work, we attempt to develop a novel material for achieving both the photothermal conversion and temperature sensing and control at the same time. To this end, a core-shell structure with NaYF 4 :Er 3+ /Yb 3+ core for temperature detection and NaYF 4 :Tm 3+ /Yb 3+ shell for photothermal conversion was designed and prepared. The crystal structure and morphology of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Furthermore, the temperature sensing properties for the NaYF 4 :Er 3+ /Yb 3+ and core-shell NaYF 4 :Er 3+ /Yb 3+ @NaYF 4 :Tm 3+ /Yb 3+ nanoparticles were studied. It was found that the temperature sensing performance of the core-shell nanoparticles did not become worse due to coating of NaYF 4 :Tm 3+ /Yb 3+ shell. The photothermal conversion behaviors were examined in cyclohexane solution based on the temperature response, the NaYF 4 :Er 3+ /Yb 3+ @NaYF 4 :Tm 3+ /Yb 3+ core-shell nanoparticles exhibited more effective photothermal conversion than that of NaYF 4 :Er 3+ /Yb 3+ nanoparticles, and a net temperature increment of about 7 °C was achieved by using the core-shell nanoparticles.
研究领域:
纳米技术
·
材料科学
·
生物医学工程
·
癌症治疗
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Biomedical Optics Express
·
2015
·Vol. 6
·期 5
·1857-1866
·
IF 3.648
Jing Liu,Ruitao Wu,Nana Li,Xin Zhang,Qiuqiang Zhan,Sailing He
It is challenging to achieve deep microscopic imaging for the strong scattering in biotissue. An efficient three-photon luminescence can effectively increase the penetration depth. Here we report that β-NaYF4: Er3+/NaYF4 UCNPs were excited by a 1480-nm CW-laser and emitted 543/653-nm light through a three-photon process. With the merit of the hexagonal crystal phase, sub-milliwatt laser power was utilized to excite the UCNP-probed cells to minimize the heating effect. The polymer-coated UCNPs were shown to be harmless to cells. The deep, high contrast in vitro microscopic imaging was implemented through an artificial phantom. Imaging depth of 800 μm was achieved using only 1.5 mW excitation and a 0.7 NA objective. The green/red emission intensities ratio after penetrating the phantom was studied, indicating that longer emission wavelength is preferred for deep multiphoton microscopy. The proposed and demonstrated β-UCNPs would have great potential in three-photon microscopy.
研究领域:
生物医学工程
·
光学成像
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
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
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Yidi Wang,Bowen Li,Guanshu Li,Xue Ma,Hongbo Zhang,Yingying Huang,Guowei Wang,Jun Wang,Youtao Song
Z-scheme structure is an effectively construction to improve the photocatalytic activity due to the excellent photo-generated electron-hole pairs separation efficiency. In this paper, the Er 3+ :YAlO 3 @(PdS/BiPO 4 )/(Au/rGO), (Au/rGO)/CdS and modified Z-scheme Er 3+ :YAlO 3 @(PdS/BiPO 4 )/(Au/rGO)/CdS photocatalysts were prepared by hydrothermal, ultrasonic dispersion, deposition-precipitation and ultrasonic-assisted methods. The prepared samples were characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectra (DRS), fourier transform infrared spectra (FT-IR), raman spectra and photoluminescence (PL) spectra. The photocatalytic activity of prepared samples were evaluated via photocatalytic conversion rate of nitrite under ultraviolet-light and simulated solar-light irradiations. Due to the enhanced separation efficiency of electron-hole pairs, the Er 3+ :YAlO 3 @(PdS/BiPO 4 )/(Au/rGO)/CdS exhibited excellent performance under both ultraviolet-light and simulated solar-light irradiation, reaching 94.59% and 91.25% conversion rates, respectively. Meanwhile, the effects of simulated solar-light irradiation time and corresponding reaction kinetics on photocatalytic conversion of nitrite were studied. Subsequently, the effects of electron and hole scavengers were investigated to further elaborate the possible mechanism. In addition, the study of used times showed that the prepared modified Z-scheme Er 3+ :YAlO 3 @(PdS/BiPO 4 )/(Au/rGO)/CdS nanocomposites can be effectively recycled without an apparent inactivation on photocatalytic activity. This research may provide a potential way by utilizing solar energy efficiently for converting nitrite and other contaminants released into the environment.
研究领域:
材料科学
·
环境科学
·
化学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xiangpeng Geng,Wen Zhang,Dekai Guan,Yaxin Liu,Bin Ma
In this research, SrWO 4 substrates co-doped with Eu 3+ and Er 3+ were employed to fabricate phosphors with a homogeneous distribution of Eu and Er. The optimal doping concentrations of Eu 3+ and Er 3+ (3% and 4%, respectively) were determined experimentally, and the luminescence mechanism of the phosphor was thoroughly investigated. The concentration quenching mechanism was also analyzed, and thermal stability tests were performed. The experimental results indicate that, due to the thermal quenching effect, the luminescence intensities of both Eu 3+ and Er 3+ ions gradually decrease with increasing temperature. Based on the experimental findings and numerical calculations, the quenching activation energy was determined. The absolute sensitivity ( S a , 0.417% K −1 and 1.132% K −1 ) and relative sensitivity ( S r , 4.236% K −1 and 1.401% K −1 ) of the phosphors were obtained through simulations, and these values are greater than those reported in previous studies. The phosphors were then mixed with ink, and the obtained mixture was printed to produce a pattern, the colors of which became visible under different excitation light sources. The configuration displays a variety of colors at different temperatures, demonstrates effective applicability for anti-counterfeiting purposes, and exhibits multi-mode anti-counterfeiting functionality. These features indicate that the proposed phosphors meet the requirements of advanced anti-counterfeiting technologies.
研究领域:
材料科学
·
光学材料
·
固体物理
·
应用物理
·
安全技术
✓ 已验证
DOI
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
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）