RSC Advances
·
2016
·Vol. 6
·期 31
·26280-26287
·
IF 3.289
Binbin Li,Heng Liu,Chuanbin Sun,Zeeshan Ahmad,Zhaohui Ren,Xiang Li,Gaorong Han
The investigation of nano-carriers with controllable and trackable drug release kinetics has attracted worldwide attention for new tumor theranostic strategies with catabatic side effects. Herein, a range of monodispersed core–shell structured photoluminescent SrTiO3:Yb3+,Er3+@mSiO2 nanoparticles were designed and synthesized. The surfactant cetyltrimethylammonium bromide (CTAB) was used to vary the microstructure of the mesoporous SiO2 shell. The specific surface area and pore volume increase proportionally with the content of CTAB. Consequently, the doxorubicin (DOX) loading capacity increases, and the drug release kinetics possesses a sustained behaviour. More importantly, the DOX release kinetics was found to correspond well to the evolution of the up-conversion luminescence (UCL) phenomenon. More rapid drug release induces more rapid photoluminescence enhancement, and vice versa. This study has therefore been anticipated to suggest another promising multifunctional drug delivery platform for advanced chemotherapies.
研究领域:
纳米医学
·
药物递送系统
·
生物材料
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Qianru Zhao,Jiang Zhao,Min Tao,Cheng Wang,Xueqin Zeng,Yongmin Hu,Shengfu Wang,Minghua Zeng,Wei Zhou,Haoshuang Gu,Yuebin Li
The lanthanide doped NaYF 4 , one of the most efficient upconverting materials, which shows great potential in the applications of future optoelectronic devices. Although there are many progress on the synthesis and performance modulations of upconversion fluorescence single crystal and nanoparticles , it is still a great challenge to fabricate upconverting thin film to compatible with modern planar silicon photoelectronic devices. In this work, patterned NaYF 4 : Yb 3+ , Er 3+ thin films were prepared by a well-designed strategy combined with photolithography and electrodeposition at 50 °C. The thickness of NaYF 4 : Yb 3+ , Er 3+ thin films could be modulated from 1.6 ± 0.3 to 6.1 ± 0.4 μm by the deposition time. After the further annealing at 300 °C, the NaYF 4 : Yb 3+ , Er 3+ thin films present efficient green upconversion fluorescence with fine spectra from 510 to 720 nm, which resulted from the electronic transitions of doped Er 3+ ions . The application of laser direct-writing mask could introduce the desired micropattern of NaYF 4 : Yb 3+ , Er 3+ thin films, which show uniform distributed green upconversion fluorescence pixel with fine resolution of about 50 μm. The intense upconversion luminescence pattern with high spatial resolution show great application potential in the fields of displays, photodetectors , biological sensors, solar energy converter and commercial anticounterfeiting.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2024
·
IF 3.2
Bin Duan,Changchun Ding,Mengjia Zhang,Yuxiang Wu,Yongqiang Li,Wei Jin,Fengyi Wang,Junshan Hu
Exploring novel oxysalt compounds remains significant due to their affordability and versatile applications, such as serving as laser crystals, piezoelectric crystals, frequency-doubling crystals, and luminescent materials. Specifically, this study introduces a new near-single green upconversion luminescent Ca 9 (VO 4 ) 7 : Yb 3+ /Er 3+ material, synthesized through high-temperature solid-phase methods. When subjected to 980 nm near-infrared laser irradiation, the Ca 9 (VO 4 ) 7 : 0.3 Yb 3+ , 0.02 Er 3+ phosphor demonstrates robust green luminescence at 531 nm ( 2 H 11/2 → 4 I 15/2 ) and 558 nm ( 4 S 3/2 → 4 I 15/2 ), accompanied by faint red luminescence at 665 nm ( 4 F 9/2 → 4 I 15/2 ). The optimal doping concentrations for Yb 3+ and Er 3+ ions, yielding the highest upconversion luminescence intensity, are determined to be 0.3 and 0.02, respectively. The investigation elucidates the upconversion luminescence mechanism through the downward shift spectrum in photoluminescence and the pumping power dependence of upconversion green-red luminescence. The primary excitation pathway identified for the upconversion process in Ca 9 Y(VO 4 ) 7 : 0.3 Yb 3+ , 0.02 Er 3+ involves Yb 3+ ( 2 F 5/2 ) + Er 3+ ( 4 I 11/2 ) → Yb 3+ ( 2 F 7/2 ) + Er 3+ ( 4 F 7/2 ). This research contributes to the exploration of new materials, injecting vitality into modern industries and production processes.
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
·
2024
·
IF 5.1
Hong Wang,Boyuan Zhang,Jiaqi Zhao,Mingming Xing,Ying Tian,Yao Fu
Thermally enhanced upconversion luminescence (UCL) materials have obvious advantages in the various fields of optical temperature sensing, anti-counterfeiting, and display. Here, we report a novel thermal enhancement UCL phosphor of Ca 2 Gd 8 Si 6 O 26 :Yb 3+ ,Er 3+ (CGSO:Yb 3+ ,Er 3+ ). Benefiting from the thermally enhanced phonon-assisted effect, anti-Stokes sideband excitation of Yb 3+ , energy transfer from Yb 3+ to Er 3+ , and thermal population from selective energy levels of Er 3+ are promoted with increasing temperature, which contributes to the thermal enhancement UCL of 4 F 7/2 → 4 I 15/2 , 2 H 11/2 → 4 I 15/2 , and 4 I 9/2 → 4 I 15/2 radiation transitions of Er 3+ ions. In addition, the rarely thermal enhancement of near infrared emission at 870 nm observed may be attributed to the Yb 3+ -induced effect. Furthermore, thermal quenching occurs for 4 S 3/2 → 4 I 15/2 and 4 F 9/2 → 4 I 15/2 transitions due to thermally enhanced multiphonon relaxation and thermal population. The combination of thermal enhancement and thermal quenching effect, the ratiometric optical thermometer is constructed in the wide temperature range 303–723 K by leveraging of the thermally coupled energy levels 2 H 11/2 and 4 S 3/2 of Er 3+ . This optical thermometer shows excellent temperature measurement performances with a maximum relative sensitivity of 1.1 × 10 −2 K −1 at 303 K and high repeatability of 99 %. These findings indicate that CGSO:Yb 3+ ,Er 3+ phosphors with thermally enhanced UCL have great potential application for temperature sensing.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2024
·
IF 2.8
Yong Tang,Qiuyue Ran
This paper synthesized Y 2 O 3 : Yb 3+ /Er 3+ /Tm 3+ fluorescent crystals (YET) by annealing using the laser zone melting method. When the 365 nm(UV) and 980 nm(IR) lasers are excited together, the luminescence color of YET can be changed by adjusting the laser power. It can be adjusted between orange-red, yellow-green, and white. The temperature sensing characteristics based on the fluorescence intensity ratio (FIR) of non-thermally coupled levels (NTCL) and thermally coupled levels (TCL) of Tm 3+ and Er 3+ ions were studied. The derived maximum relative sensitivity ( S R ) reached the impressive value of 10.871 K -1 (303 K) and 0.511 %K −1 (563K), respectively. Moreover, as the temperature increases, the luminescence of the YET emission changes from white to blue. So, the luminescence emitted by YET can be adjusted between red, green, blue, and white. Therefore, using dual lasers to excite fluorescent materials can provide a suitable method for color-adjustable phosphor.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Xiadiyan Refuhati,Xiaojun Guo,Yanzhen Xiao,Jinze Li,Sihan Wang,Wangze Li,Yifan Zhu,Lei Yan,Zhengkun Fu,Zhenglong Zhang,Hairong Zheng
Integrating upconversion nanoparticles (UCNPs) with nanodiamonds (NDs) constitutes a promising platform for the development of multifunctional systems in photonics and sensing. However, achieving strong interfacial coupling while preserving the unique properties of both components remains a significant challenge. In this study, we introduce a novel composite material formed by covalently conjugating NaYF 4 : Yb 3 + /Er 3 + UCNPs with NDs. Subsequent controlled near-infrared (NIR) laser processing generates a high-phonon-energy, sp 2 -hybridized carbon interface on the NDs while preserving the intrinsic nitrogen vacancy (NV) centers. This leads to the selective quenching of the Er 3 + red emission ( 4 F 9 / 2 → 4 I 15 / 2 ), resulting in green-dominant luminescence and a shortened fluorescence lifetime. The laser-processed composite demonstrates enhanced temperature-sensing performance by utilizing non-thermally coupled levels (NTCLs) of Er 3 + , specifically the 2 H 11 / 2 and 4 F 9 / 2 levels. The composite achieves a maximum relative sensitivity of 4.89% K −1 over a temperature range of 173–523 K. This work establishes laser processing as a powerful strategy for tailoring interfacial properties in hybrid nanomaterials, thereby opening new possibilities for high-performance temperature sensors and multifunctional platforms in quantum sensing and bioimaging.
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Liuyan Zhou,Yanling Chen,Yuyu Shen,Jianhua Lin,Jie Fu,Lei Lei,Renguang Ye,Degang Deng,Shiqing Xu
Down/upconversion Ca14Al10Zn6O35 inorganic phosphors codoped with Ti4+/Eu3+ or Yb3+/Er3+ were prepared. The crystal structure and downconversion luminescence properties of Ca14Al10Zn6O35:Ti4+, Eu3+ phosphors were studied in detail. Ti4+ and Eu3+ occupied Al3+ and Ca2+ sites in the host lattice, respectively. Under the excitation of 273 nm, the emission peak in the 300–570 nm band originated from the 2T2 → O2– transition of Ti4+. The f–f transition of Eu3+ ions generated multiple peaks in the 570–800 nm range. The emission intensity of Ti4+ and Eu3+ ions can be used as a fluorescence intensity ratio (FIR) signal. Based on the FIR technology, the maximum relative sensitivity (Sr) and the minimum temperature uncertainty (δT) reached 1.41% K–1 and 0.07 K, respectively. Meanwhile, the temperature-sensing behaviors were explored by the temperature-dependent upconversion spectra of Er3+- and Yb3+-codoped Ca14Al10Zn6O35 phosphors. Based on the fluorescence intensity ratio of thermal coupling levels (Er3+:2H11/2/4S3/2), the maximum Sr and minimum δT of upconversion phosphors reached 1.28% K–1 and 0.08 K in the temperature range of 293–473 K, respectively. Ca14Al10Zn6O35:Ti4+/Eu3+ (Yb3+/Er3+) phosphors realize temperature sensors with higher relative sensitivity, and it is a good candidate material for optical temperature measurement.
研究领域:
材料科学
·
光学传感器
·
发光材料
·
固体物理
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2014
·
IF 2.726
Chuanying Wang,Xianhua Cheng
Using a facile hydrothermal method , hexagonal β-NaYF 4 :Yb 3+ 20 mol%, Er 3+ 1 mol% crystals with predictable size and morphology were synthesized and the upconversion (UC) luminescence properties were investigated. X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence (PL) spectra were used to characterize the samples. The results indicated that the size and morphology of the crystals can be precisely controlled by tuning the pH values of the initial reaction solution and the molar ratio of NaNO 3 to RE 3+ (RE = Y + Yb + Er), and the mechanism was proposed. The UC luminescence properties of β-NaYF 4 :Yb 3+ /Er 3+ crystals were found to strongly depend on the crystal morphologies and sizes. The peak area ratio of green to red (R/G) increased from 0.29 to 1.03 with pH values increasing from 3 to 10, and increased from 1.03 to 1.26 with the increase of molar ratio of NaNO 3 to RE 3+ from 0 to 90. The emission colors were tuned from pure green to orange yellow. This study provides a facile way to synthesize β-NaYF 4 :Yb 3+ /Er 3+ crystals with predictable morphology and size, and tunable luminescence properties, which can be applicable for other rare earth fluoride compounds.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2016
·
IF 2.265
Wenjuan Bian,Wei Lu,Yushuang Qi,Xue Yu,Dacheng Zhou,Yong Yang,Jianbei Qiu,Xuhui Xu
The synergistic effect appeared due to the cooperative dual-wavelength excitation by near-infrared (NIR) and ultraviolet (UV) light in rare-earth doped nano-particles (NPs) is very important to improve solar cell efficiency. Herein, we studied the synergistic effect combined with the energy levels of Er 3+ ions and the defect states in KLu 2 F 7 NPs. The introduction of Ce 3+ ions in KLu 2 F 7 :16%Yb 3+ , 2%Er 3+ NPs results in significant improvement of synergistic effect by producing more vacancy defects ( V K ′ ) which serves as shallow traps. We verify unambiguously that the control of the defects distribution exerts a facile approach to promote the synergistic effect with the assistance of Ce 3+ ions doping.
研究领域:
材料科学
·
光物理
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 95
·77673-77681
·
IF 3.84
Lizhen Sun,Jianfu Pan,Xiaobin Zhang,Heng Wang,Lingyun Li,Yan Yu
YOF: Yb3+, Er3+ powders with rhombohedral phase were successfully synthesized by using a modified sol–gel method with calcinating under a temperature range between 400 °C and 600 °C. A systematic study on the temperature-dependent morphology and spectroscopic properties of rhombohedral YOF: Yb3+, Er3+ powders have been performed. The YOF: Yb3+, Er3+ powders that prepared at 400 °C and 500 °C exhibit a plate growth habit, while the powder that prepared at 600 °C shows a sintering property. When excited by 980 nm laser beam, all of the rhombohedral YOF: Yb3+, Er3+ powders show efficient red light emission with light wavelength ranging from 630 nm to 700 nm. The upconversion mechanism and luminescence decay properties were discussed in detail.
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
·
2024
·
IF 5.1
Wei Gao,Jinglei Zhang,Lin Shao,Jiaxi Li,Peng Ding,Qingyan Han,Xuewen Yan,Chenyun Zhang,Jun Dong
Enhancing upconversion luminescence in rare-earth materials through the plasmonic effects of precious metals has emerged as a highly effective strategy. In this study, we explore three distinct self-assembly techniques to fabricate alloy nano-film substrates using silver-coated gold (Au@Ag) core-shell nanoparticles, each with unique structural attributes. To enhance the upconversion luminescence of Er 3+ ions, we combine these substrates with NaYF 4 :Yb 3+ /Er 3+ nanoparticles, creating NaYF 4 :Yb 3+ /Er 3+ /Au@Ag composite nanostructures. The upconversion emission of Er 3+ ions is observably boosted when directly combined with Au@Ag nano-films of various structures under a 980 nm laser excitation. Surprisingly, incorporating a NaYF 4 inert shell as an isolating layer results in a remarkable 13.7-fold enhancement of upconversion luminescence in the NaYF 4 :Yb 3+ /Er 3+ @NaYF 4 /Au@Ag composite structure relative to isolated NaYF 4 : Yb 3+ /Er 3+ nanoparticles. The enhancement mechanism was carefully discussed based on spectral characteristics and luminous lifetime. It was found that the enhanced upconversion emission of nanoparticles on differently structured substrates is primarily driven by excitation enhancement. The composite rare-earth and metal nanoparticle structures fabricated in this investigation not only effectively enhance material spectral properties effectively but also streamline the process by employing an inert NaYF 4 shell as an isolation layer. This novel approach offers a promising avenue for developing efficient luminescent material systems.
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
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2016
·Vol. 16
·期 7
·6970-6977
·
IF 1.338
Xiong Xiaoyuan,Sun Ying,Gao Pei,Li He,Duan Yourong
In this work, an anticancer drug delivery system based on curcumin-conjugated NaYF4:Yb3+, Er3+ nanoparticles was developed. The as-prepared nanoconstruct consisting of uniform hexagonal nanoparticles with an average diameter of about 200 nm was synthesized.
A natural photosensitizer curcumin was loaded onto the nanoparticles through covalent interaction and physical adsorption. Drug loading efficiency was calculated and it turns out a high loading capacity of the as-prepared nanoparticles. Cytotoxity experiments of carboxylic acid-functionalized
UCNPs and curcumin-UCNPs were performed via MTT assay. The drug delivery system demonstrates the ability to be uptaken by three different kinds of cell lines (Human hepatocellular carcinoma Bel-7402 cells, Human SKOV-3 ovarian cancer cells and Human breast adenocarcinoma MCF-7 cells) and to
generate reactive oxygen species upon the excitation of near-infrared light, so as to kill tumor cells. To sum up, such a drug delivery system exhibits good potential in cancer therapy.
研究领域:
纳米技术
·
癌症研究
·
材料科学
·
药学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）