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
CERAMICS INTERNATIONAL
·
2015
·
IF 2.605
Yurun Ma,Pingsun Qiu,Dongfang Xu,Jinrong Lin,Yanxue Tang,Feifei Wang,Xiyun He,Ziyao Zhou,Nianxiang Sun,Xinyang Zhang,Yi Zhou,Dazhi Sun
NaYF 4 nanorods , and nanoparticles co-doping with Yb 3+ and Er 3+ were synthesized by hydrothermal method . The effects of doped ion concentration, the ratio of NaF to Ln (NO 3 ) 3 and the reactant content on the luminescence properties of the nanocrystals were investigated in detail in this paper. The materials were characterized by powder X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and photoluminescence (PL) spectra. The results indicate that a doping level of 20 mol% Yb 3+ and 2 mol% Er 3+ gives the strongest luminescence, and concentration quenching occurs, when Er 3+ concentration exceeds 5 mol%. Besides, the reaction of temperature and time were also investigated and the results showed that they have an effect on the shape, size, and crystal phase purity of the nanoparticles . The luminescence mechanism for the NaYF 4 :Yb 3+ , Er 3+ was discussed. Under 980 nm excitation, the Er 3+ ions doped into NaYF 4 samples emitted green fluorescence 520 nm ( 4 H 11/2 → 4 H 15/2 ), 550 nm ( 4 S 3/2 → 4 H 15/2 ) and red fluorescence 650 nm( 4 F 9/2 → 4 I 15/2 ), which were modified and enhanced by Yb 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
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
COMPOSITES PART B-ENGINEERING
·
2019
·
IF 6.864
Guo Gong,Ya Song,Haihu Tan,Shaowen Xie,Changfan Zhang,Lijian Xu,Jianxiong Xu,Jie Zheng
Lanthanide-doped NaYF 4 upconversion luminescent nanophosphors have attracted great interest for anti-counterfeiting applications. However, low luminescent intensity caused by surface defects and low extinction coefficients of lanthanide dopants greatly limits their practical applications. Herein, we developed core/active-shell NaYF 4 :Ln 3+ @NaYF 4 :Yb 3+ (e.g. NaYF 4 :Er 3+ /Tm 3+ @NaYF 4 :Yb 3+ , NaYF 4 :Yb 3+ /Er 3+ @NaYF 4 :Yb 3+ , and NaYF 4 : Yb 3+ /Tm 3+ @NaYF 4 :Yb 3+ ) nanophosphors with enhanced near-infrared (NIR)-to-visible upconversion luminescence by coating Yb 3+ -doped NaYF 4 shell (active-shell) on NaYF 4 :Ln 3+ upconversion core nanoparticles . The structure, morphology, and elemental composition of NaYF 4 :Ln 3+ @NaYF 4 :Yb 3+ core/active-shell nanoparticles (CASNs), NaYF 4 :Ln 3+ @NaYF 4 core/inert-shell nanoparticles, and NaYF 4 :Ln 3+ core nanoparticles were characterized and compared systematically to reveal their structure-property relationship. Collective data showed that coating of a NaYF 4 :Yb 3+ active shell on NaYF 4 :Ln 3+ cores significantly enhanced upconversion luminescent intensity by ~21 times, while an inert (pure NaYF 4 ) shell coated on the surface of NaYF 4 :Ln 3+ core only resulted in 5.2 times luminescence enhancement. The enhanced upconversion luminescence intensity was mainly attributed to (i) the NaYF 4 shell-reduced quenching effect and (ii) the promoted transformation of the absorbed NIR light from the pump source to the core nanoparticles by Yb 3+ sensitizer in the active shell. Moreover, by tailoring dopant pairs and molar ratios of lanthanide ions in the core nanoparticles, three CASNs with enhanced red, green, and blue upconversion luminescence were obtained and fabricated into environmental benign luminescent inks. The inkjet printing of RGB CASNs inks on papers produced multiple-color, high-resolution, complex luminescent patterns under 980 nm laser. This work expands the lanthanide-doped NaYF 4 materials for anti-counterfeiting applications.
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 SOLID STATE CHEMISTRY
·
2019
·
IF 2.291
Ping Xiao,Song Ye,Huazhen Liao,Yanling Shi,Deping Wang
The ability to increase the emission intensity and turn the emission color of upconversion nanocrystals (NCs) will greatly enhance their application scopes. In this research, the sub-10 nm pure β-NaYF 4 : Yb 3+ /Tm 3+ /Ho 3+ core NCs were prepared by using sodium oleate (NaOA) as sodium source instead of the traditional NaOH, based on which the β-NaYF 4 :Yb 3+ /Er 3+ @NaYF 4 core-shell NCs were successfully obtained with seed-mediated growth method. The spectral measurement and the calculated CIE color coordinates revealed that the growing of inert NaYF 4 shell on the active NaYF 4 : Yb 3+ /Tm 3+ /Ho 3+ core NCs can not only effectively increase the upconversion emission intensity, but also realize extended tunable emission from blue to orange by turning Ho 3+ concentration, and a strong white light emission with chromaticity coordinates of (0.32, 0.33) can be obtained in the NaY 0.77 F 4 :0.2Yb 3+ /0.01Tm 3+ /0.02Ho 3+ @NaYF 4 core-shell NCs. Furthermore, the extended color tunability and efficient white white-light generation in the core-shell NCs were demonstrated by NCs-PMMA nanocomposites under 980 nm excitation. The results suggested that the β-NaYF 4 :Yb 3+ /Er 3+ @NaYF 4 core-shell NCs have promising applications in optoelectronic devices such as light emitting diode and three-dimensional display.
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 NANOSCIENCE AND NANOTECHNOLOGY
·
2014
·Vol. 14
·期 5
·3726-3730
·
IF 1.339
Guo Xingyuan,Song Weiye,Wang Jianshuo,Shi Feng,Qin Weiping
β-NaYF4:Yb3+, Tm3+/ZnO core/shell nanoparticles (NPs) were synthesized via a high temperature thermal decomposition method. The as-synthesized core/shell NPs were characterized by X-ray diffraction (XRD), transmission electron microscopy
(TEM), and upconversion luminescence spectra (UCL). Under 980 nm laser excitation, the measured intensity of upconversion luminescence (1I6→3H6, 1I6→3F4, and 1D2→3H6)
was different with and without ZnO. During the sample preparations, changing the ratio of the solvent affected the ZnO UV absorption efficiency. The results show that the NIR light can be used as the driving source to excite ZnO, thus extending utility rate to the NIR spectral region and enhancing
the light harvest rate.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
CURRENT APPLIED PHYSICS
·
2025
·
IF 3.1
Xiangyuan Duan,Shuyan Xu
Fluorescent composite films were prepared using polyvinyl alcohol (PVA) as the substrate and NaYF 4 :Eu 3+ phosphors and κ-carrageenan powder (KC) as the fillers by the casting method. The impact of incorporating NaYF 4 :Eu 3+ on the structural, morphological, mechanical property, thermal stability, and optical characteristics of PVA/KC films was examined. The incorporation of KC promoted the formation of hydrogen bonds between KC and PVA. Consequently, the water contact angle of the films increased by approximately 10°, indicating improved water resistance. Meanwhile, the incorporation of NaYF 4 :Eu 3+ increased the thermal stability of the films, with the temperature at 5% mass loss rising by approximately 13°C. Additionally, the mass retention at 600°C improved by 3.47%. Notably, the addition of NaYF 4 :Eu 3+ had a negligible effect on the transparency of the films while imparting fluorescent properties. Under UV excitation at 395 nm, the films exhibited maximum fluorescence intensity at 616 nm, indicating a significant fluorescence effect.
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
OPTICAL MATERIALS
·
2023
·
IF 3.9
Da Cai,Zhiyuan Cheng,Tong Liu,Jinyuan Zhang,Fuhua Gao,Tian Shi,Shenghong Yang,Yueli zhang
Sm 3+ is one of the most fascinating activators because of its dominate emissions in visible region with abundant potential applications. However, its absorbing cross section and ability to be sensitized are ineffective and unpractical due to the low quenching concentration. In this work, a series of β-NaYF 4 : Ce 3+ /Gd 3+ /Sm 3+ were synthesized. Pure hexagonal phase of all samples was guaranteed by powder XRD patterns and SEM images, despite the morphology was influenced by rare earth components. The luminescence properties of β-NaYF 4 : Ce 3+ /Gd 3+ /Sm 3+ were systemically investigated by the photoluminescence excitation spectra, emission spectra and life time decay curves. Tri-doping Gd 3+ into β-NaYF 4 was found to be very helpful to enhance the sensitization of Ce 3+ on Sm 3+ . Furthermore, the rate equation of sensitizers was induced to analyze details of competition between ET Ce → Gd and Ce → Sm. Rate equation analysis also indicated that the enhancing effect of Gd 3+ on sensitization is mainly due to the greatly improved energy utilization efficiency.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2023
·
IF 8.4
Shuai Zha,Siyu Pan,Yuehan Jian,Yunhui Peng,Lijun Jiang
Hydrogen sulfide (H 2 S), a third gas signaling molecule, is considered to play a vital role in the development and treatment of diseases. To elucidate the intricate role of H 2 S in the organism and its participation in disease processes, there is an urgent need to visualize the dynamics of H 2 S. However, most currently available molecular probes have limitations in terms of sensitivity, specificity, and precision. In this study, the safe and biocompatible upconversion nanosensor NaYF 4 :Yb 3+ , Tm 3+ @NaYF 4 anchored with Ag 2 O was successfully fabricated for H 2 S detection with an ultralow detection limit at 0.93 ng/mL. NaYF 4 :Yb 3+ , Tm 3+ @NaYF 4 @Ag 2 S is formed through in situ sulfuration reaction, and second near-infrared (NIR-II) fluorescence can be recorded upon the presence of H 2 S under 808 nm excitation. The results demonstrate the exceptional detection linearity and high specificity for H 2 S quantification. Additionally, NaYF 4 :Yb 3+ , Tm 3+ @NaYF 4 @Ag 2 O possesses a safe nature in normal and cancer cells. This nanosensor presents a NIR fluorescence imaging strategy for highly sensitive and specific detection of H 2 S, which has promises to be a practical tool for biomedical applications.
研究领域:
分析化学
·
生物医学工程
·
纳米技术
·
分子生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2013
·
IF 2.144
Suli Wu,Yanhui Ning,Jie Chang,Shufen Zhang
Here, hydro/solvent thermal method was applied to synthesize lanthanide doped NaYF 4 upconversion nanoparticles (UCNPs). In order to overcome the quenching effect of (CH 2 ) n due to their high energy stretching vibration , a series of new chelating ligands such as, butanoic acid , hexanoic acid , decanoic acid , and tetradecanoic acid were selected for hydrothermal synthesis of NaYF 4 :Yb, Er nanocrystals . For comparison, commonly used oleic acid was also used as ligand for hydrothermal synthesis of UCNPs. The effect of the carbon chain length of chelating ligands on the NaYF 4 nanocrystals’ emission intensity was systematically investigated. It was found that relative short length of the carbon chain in chelating ligands resulted in enhancement of luminescent intensity and modulation of the ratios of green to red (RGR) of NaYF 4 :Yb, Er nanocrystals. In contrast to the product prepared with oleic acid as ligand, the enhancement factors of 540 nm emissions were 25, 21, 6.5, and 3 for samples prepared with butanoic acid, hexanoic acid, decanoic acid, and tetradecanoic acid as ligands, respectively. The FT-IR spectra of NaYF 4 :Yb, Er UCNPs prepared with different ligands indicated that ligands with relatively short chain length indeed have weak IR absorption in 2800–2950 cm −1 , which resulted in weak quenching effect of Er 3+ . We also synthesized NaYF 4 :Yb, Tm UCNPs with these ligands. The results showed that chain length of ligands has similar effect on emission intensity of NaYF 4 :Yb, Tm. It is expected that this method can also be applied to enhance the luminescence intensity of other luminescent materials.
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 NANOSCIENCE AND NANOTECHNOLOGY
·
2014
·Vol. 14
·期 5
·3711-3717
·
IF 1.339
Liu Yunxia,Liu Baocang,Xu Guangran,Wang Qin,Hu Wenting,Liu Yang,Jia Wenjing,Liu Yongxin,Zhang Jun
Upconversion luminescent NaYF4:Yb3+, Er3+/Tm3+ nanocrystals were successfully synthesized via a facile and one-pot solvothermal method using oleic acid/oleylamine (OA/OM) as surfactants. The effects of synthetic parameters including rare earth
ion doping concentrations and temperatures on the crystal phase structure, size and shape of NaYF4:Yb3+, Er3+/Tm3+ nanocrystals were systematically investigated. By modulating the synthetic parameters, the shape of NaYF4:Yb3+,
Er3+/Tm3+ nanocrystals were controlled in forms of nanorods and nanowires. The reaction temperature has large effects on the phase structure of NaYF4:Yb3+, Er3+/Tm3+ nanorods, exhibiting a phase transformation from cubic phase
(α-) in low temperatures to hexagonal phase (β-) in high temperatures. Moreover, the upconversion luminescence of NaYF4:Yb3+, Er3+/Tm3+ nanocrystals was found to be dependent on the rare earth ion doping concentrations and
temperatures.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2018
·Vol. 18
·期 12
·8207-8215
·
IF 1.354
Gong Guo,Xie Shaowen,Song Ya,Tan Haihu,Xu Jianxiong,Zhang Changfan,Xu Lijian
Well-defined and mono-dispersed lanthanide-ion-doped NaYF4 up-conversion nanoparticles (UCNPs) were synthesized via thermal decomposition using lanthanide oleate as the precursor. By rational selecting the dopant pairs of the doped lanthanide ions (Y3+, Yb3+,
Er3+ and Tm3+) with accurate molar ratios, three-primary-color (RGB) UCNPs which exhibited green (UCNPs-G), blue (UCNPs-B) and red (UCNPs-R) fluorescence, respectively, were prepared. The X-ray diffraction (XRD) patterns showed that the three UCNPs were purely hexagonal-phase
NaYF4 crystals. Transmission electron microscopy (TEM) images revealed that the synthesized UCNPs exhibited well-defined nanosphere morphology with uniform size distribution. The average diameters were 23.95±3.35 nm for UCNPs-G, 20.63±2.59 nm for UCNPs-B, and 19.24±2.37
nm for UCNPs-R, respectively. After surface modification employing polyacrylic acid (PAA) as modifier, the obtained UCNPs were converted to be hydrophilic, which can be used as fillers to construct luminescent polymer films and luminescent ink in anti-counterfeiting application.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）