JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Jinmeng Guo,Yang Shen,Liang Chen,Degang Deng,Shiqing Xu
The up-conversion (UC) La 2 MgGeO 6 : Er 3+ , Yb 3+ phosphors were prepared by a high-temperature solid-phase method. The structural phase and luminescence characteristics of the samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and photoluminescence spectra . The research systematically investigated a multi-mode optical thermometry based on fluorescence intensity ratios (FIR) of the thermal-coupled energy levels 2 H 11/2 / 4 S 3/2 , non-thermal-coupled energy levels 4 S 3/2 / 4 F 9/2 , and the fluorescence lifetime of the 4 S 3/2 state. Based on these methods, the maximum relative sensitivity reached 1.130%K −1 , 0.623%K −1 , and 2.914%K −1 , respectively. According to the results, the manufactured samples have remarkable temperature measuring performance, which is characterized by a broad temperature measurement range, high sensitivity, and superior stability.
研究领域:
材料科学
·
光学
·
测温学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Dan Yang,Libing Liao,Yidi Zhang,Qingfeng Guo,Lefu Mei,Haikun Liu
In this paper, K 3 ScF 6 :Yb 3+ , Tm 3+ phosphor with a cubic cryolite phase were prepared by means of high-temperature solid-state method. The crystal structure and up-conversion luminescence properties of Tm 3+ and Yb 3+ co-doped K 3 ScF 6 were investigated in detail. Scanning electron microscope (SEM), energy disperse spectroscopy (EDS), elemental mapping and X-ray photoelectron spectroscopy (XPS) were used to analyze the elements composition , elemental distribution and valence states of samples. Under an excitation wavelength at 980 nm, all the samples displayed blue and red emission. When gradually increasing the concentration of Tm 3+ in K 3 ScF 6 :0.2 Yb 3+ , Tm 3+ and Yb 3+ in K 3 ScF 6 : 0.01 Tm 3+ , Yb 3+ , the emission intensity of the samples appeared obviously concentration quenching effect, and the optimum concentration of Tm 3+ and Yb 3+ were confirmed to 0.01 and 0.20 mol%. Additionally, the effect of pump power on up-conversion emission intensity and the energy transfer mechanism between the Tm 3+ and Yb 3+ in these samples were analyzed in detail.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jiaqi Wang,Tongtong Gao,Huiling Zheng,Shuanglong Chen,Xuejiao Wang,Qiushi Wang
Rare-earth (RE) doped aluminum nitride (AlN) holds great promise for integrated optoelectronic devices. Here, the Ho and Yb co-doped AlN (AlN:Ho 3+ /Yb 3+ ) submicron towers were prepared by a direct nitridation route. XRD, Raman, XPS and EDS studies showed successful doping of Ho and Yb ions into AlN. SEM images show that the submicron towers have an interesting layered structure by layer-by-layer stacking of hexagonal AlN nanosheets. Under excitation at 980 nm, AlN:Ho 3+ /Yb 3+ submicron towers exhibit up-conversion (UC) luminescence at 540, 550, 659, and 762 nm, which are due to Ho 3+ /Yb 3+ system from 5 F 4 , 5 S 2 → 5 I 8 , 5 F 5 → 5 I 8 , and 5 F 4 , 5 S 2 → 5 I 7 respectively. Based on the intensity ratio and decay lifetime of UC luminescence, the optical temperature sensing characteristics are investigated from 298 K to 548 K. The maximum relative sensitivities associated with the intensity ratio of I 540, 550 and I 659 and decay lifetime of 659 nm are as high as 2.73% K −1 and 0.43% K −1 , respectively. This work broadens the optoelectronic properties of RE doped AlN.
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
·
2025
·
IF 5.6
Yuanyuan Fan,Shun Li,Daobin Zhu,Keyu Guo,Rangrang Fan,Chunfeng Dong,Yongtao Liu,Yong Li,Junshan Hu
The thermal quenching effect of photoluminescent materials greatly limits their practical applications in bioimaging, sensing, radiation detection, and photovoltaic devices. In this paper, the upconversion luminescence (UCL) of Sc 2 W 3 O 12 :Er 3+ /Yb 3+ was significantly improved by doping Ba 2+ ions. The study identifies that the optimal doping concentration of Ba 2+ ions within the negative thermal expansion (NTE) phosphors Sc 2 W 3 O 12 : Er 3+ /Yb 3+ is 0.03 mol, the green and red light intensities of Sc 2 W 3 O 12 : Er 3+ /Yb 3+ /Ba 2+ phosphor were increased by 32.76 times and 23.06 times. When the temperature rises from 298 K to 523 K, the NTE effect causes an abnormally increased luminous intensity. Utilizing fluorescence intensity ratio (FIR) technology, the temperature sensing characteristics of the Sc 2 W 3 O 12 : 0.30 Yb 3+ , 0.02 Er 3+ , 0.03 Ba 2+ phosphor were further examined, achieving maximum relative and absolute sensitivities of 1.24 % K −1 and 1.97 % K −1 , respectively.
研究领域:
材料科学
·
无机化学
·
光子学
·
温度传感
·
功能材料
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 31
·10838-10844
·
IF 4.39
Xia Xu,Meirong Fu,Penghui Li,Min Yang
While photothermal therapy is widely applied in phototherapy, there are still challenges in developing new generation phototherapy materials with precise diagnostic functions. Here we report the construction of a pH responsive upconversion fluorescence imaging precisely guided photothermal therapy system, namely NaYF4:Yb3+/Er3+@NaYF4@MnO2@Au nanocomposites, which can effectively avoid light damage to non-target tissues. Owing to the fluorescence resonance energy transfer between the upconversion nanocrystal donor and MnO2 and Au acceptor, the upconversion fluorescence is completely quenched. However, in pH 5.3 PBS buffer, MnO2 is gradually broken down, and the upconversion fluorescence is partially recovered, which could be used for upconversion fluorescence imaging to precisely guide photothermal therapy under 980 nm excitation. Simultaneously, due to the absorption of 980 nm excitation light and the emission bands of Er3+ (2H11/2 → 4I15/2 and 4S3/2 → 4I15/2 transition), temperature increment of core@shell@MnO2@Au could reach 35.5 °C under 980 nm excitation at 0.8 W cm−2. The core@shell@MnO2@Au nanocomposites are supposed to contribute significantly in the biological applications of photoluminescence imaging and photothermal therapy.
研究领域:
生物医学工程
·
纳米医学
·
光疗技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2013
·Vol. 15
·期 35
·14681-14688
·
IF 3.829
Xingyuan Guo,Weiye Song,Changfeng Chen,Weihua Di,Weiping Qin
A novel near-infrared (NIR)-responsive photocatalyst, β-NaYF4:Yb3+,Tm3+@ZnO composites, was prepared by a two-step high temperature thermolysis method. In the NIR-responsive photocatalysis, β-NaYF4:Yb,Tm served as a NIR-to-UV upconverter and provided “UV light” or “necessary energy” to the ZnO catalyst. The energy transfer in the composites and the mixtures of β-NaYF4:Yb,Tm and ZnO was studied by using steady-state and dynamic fluorescence spectroscopy. The NIR photocatalytic activities were investigated by the decomposition of Rhodamine B. It was found that the energy transfer processes dominated the overall photocatalytic activities, and the generation of hydroxyl radicals was the origin of organic pollutant decomposition under NIR irradiation.
研究领域:
材料化学
·
光催化
·
纳米材料
·
环境化学
·
无机化学
✓ 已验证
DOI
高影响因子
ACS Applied Optical Materials
·
2024
·
IF 0
Jiaxin Li,Yujiao Zhang,Pengli Wang,Dan Xiao,Cuisong Zhou
Alloyed upconversion nanoparticles (aUCNPs, NaYbF4:10% Er@NaYF4) with high Yb3+ doping were designed to brighten luminescence, exploring multicolor patterns of information encryption. The luminescence intensity of aUCNPs was 2.3 times higher than that of common doped UCNPs reported (dUCNPs, NaYF4:20% Yb, 2% Er@NaYF4). Furthermore, because of the high Yb3+ doping (90%), both green and red emissions of aUCNPs were enhanced, ∼4.2 and ∼17.2 times stronger than that of NaYF4:20% Yb, 10% Er@NaYF4, respectively. The reasons for the aUCNPs having a brightened luminescence were explored by synthesizing four UCNPs with different structures and comparing their luminescence. These are attributed to their unique features: (1) a larger absorption cross section for accumulating energy, (2) more efficient energy transfer between Yb3+ and Er3+, and (3) their inert shell inhibiting surface quenching. Eventually, three colors including yellow, orange, and red were obtained by combining aUCNPs and neutral red (NR) taking advantage of the inner filter effect (IFE), and aUCNPs were thus successfully applied in information encryption with multicolor patterns.
研究领域:
材料科学
·
光学
·
信息安全
✓ 已验证
DOI
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Yaling Lin,Jie Hu,Yongwei Guo,Qilin Zou,Dejian Chen,Kunyuan Xu,Sisi Liang,Xiaodong Yi,Hongyu Lu,Shi-Bin Wang,Haomiao Zhu
The emission of persistent luminescence nanoparticles (PLNPs) is in the second near infrared region (NIR-II, 1000–1700 nm), considered as ideal fluorescence imaging materials because of their special characteristic consist of no autofluorescence, weak scattering and deep tissue penetration depth in biological tissues. However, it is still a great challenge to enhance their persistent luminescence intensity. Herein, we reported a new MgGe 0.8 Ga 0.2 O 3 : Yb 3+ (MGGO: Yb 3+ ) PLNPs, which were synthesized through solvothermal liquid-solid-solution and salt microemulsion method. We found that partially replacing Ge 4+ with Ga 3+ ions in MgGeO 3 host can increase the density of traps, thus significantly improving the NIR-II persistent luminescence intensity of Yb 3+ ions (the decay time is more than 33 min). Moreover, X-ray could be used to repeatedly stimulate the NIR-II persistent emission of MGGO: Yb 3+ , which is pivotal for deep tissues long term imaging. The optical penetration length of Yb 3+ ions persistent luminescence was assessed to be 3.9 mm via capping tissue. The above results reveal that MGGO: Yb 3+ PLNPs are promising material to be applied to deep-tissue imaging field.
研究领域:
材料科学
·
生物医学工程
·
光学成像
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Ronghui Liu,Quanxing Wei,Lianning Dou,Liming He,Zonghao Lei,Lijie Sun,Yanfei Zou,Shikun Su,Bing Teng,Fei You,Jianhong Li,Degao Zhong
Accurate measurement of temperature during photothermal conversion is crucial for the application of up-conversion photothermal conversion fluorescent materials. In this paper, a kind of SrIn 2 O 4 : Yb 3+ , Er 3+ up-conversion phosphor with strong photothermal conversion ability and high-precision dual-mode temperature measurement performance was synthesized by high-temperature solid-state method. Under 980 nm laser excitation, a high-precision temperature measurement with a maximum relative sensitivity of S r = 1.2 %K −1 was achieved by using the fluorescence intensity ratio of the thermally coupled energy level pairs ( 2 H 11/2 / 4 S 3/2 ) of Er 3+ ions. In addition, we found that the luminescent color of the synthesized phosphor can span a large color gamut interval with the rise of temperature, realizing the optical temperature measurement based on temperature-induced color coordinate shift. On this basis, we realized dual-mode temperature monitoring and temperature self-calibration during the photothermal conversion process of SrIn 2 O 4 : Yb 3+ , Er 3+ phosphors. These results are of great practical value for the application of photothermal conversion fluorescent materials in micro-zone heating and temperature self-monitoring.
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 Materials Chemistry C
·
2014
·Vol. 2
·期 22
·4406-4414
·
IF 0
S. Wang,F. Lou,C. Yu,Q. Zhou,M. Wang,S. Feng,D. Chen,L. Hu,W. Chen,M. Guzik,G. Boulon
Three series of Yb3+-doped silica glasses containing different amounts of Al2O3 and P2O5 were prepared successfully by using a sol–gel method. Absorption, excitation and fluorescence spectra of Yb2+ ions in these silica glasses as well as X-ray photoelectron spectra (XPS) of Yb4d were recorded and analysed systematically. It is found out that the addition of Al3+ or P5+ ions has great influence on the redox state of ytterbium ions. With increasing Al3+ ion contents in these silica glasses, more trivalent Yb3+ ions are reduced to divalent Yb2+. In contrast, the increase of P5+ ion contents greatly promotes divalent Yb2+ ions to be oxidized to trivalent Yb3+. The possible redox mechanisms have been explored and discussed in detail. The influence of Al3+ and P5+ ion contents on the near-infrared luminescence intensity of Yb3+ ions and cooperative luminescence of Yb3+ ion pairs was also discussed. Both the near-infrared luminescence intensity of Yb3+ ions and cooperative luminescence of Yb3+ ion pairs decrease gradually with increasing Al3+ and P5+ ion contents. The decrease of cooperative luminescence of Yb3+ ion pairs indicates a good dispersion effect of Al3+ and P5+ ions on Yb3+ ions in Yb3+-doped silica glass. The results are useful for optimization of fabrication of the high quality Yb3+-doped silica fiber by the composite design of Yb–Al–P co-doped silica glass.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 16
·7385-7394
·
IF 3.925
Xia Xu,Meirong Fu,Min Yang,Bing Hu,Jitao Yang,Wenjun Gui,Jinxiu Guo
4-Nitrophenol (4-NP) is one of the main toxic water pollution substances. Most 4-NP fluorescence detection methods are based on the change in the fluorescence intensity of a single emission peak, which has low sensitivity, accuracy, and narrow analytical ranges. Herein, NaYF4:Yb3+(58%),Tm3+@NaYF4@Au were designed and synthesized for the quantitative detection of 4-NP due to the fluorescence intensity ratio of two upconversion emission peaks, the analytical range is 0.01–100 μg mL−1 and the detection limit is 0.01 μg mL−1. In addition, 1.66 nm Au nanoparticles randomly distributed on the surface of composite nanomaterials can effectively cause the catalytic reduction of 4-NP. Therefore, NaYF4:Yb3+(58%),Tm3+@NaYF4@Au is a type of composite nanomaterial with great development potential and application prospects in the detection and catalysis of 4-NP.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2018
·Vol. 44
·期 10
·6369-6385
·
IF 1.674
Chen Zhangxu,Fu Ming-Lai,Huang Xiao-Dan,Yuan Baoling,Yang Jia-Cheng E.
To enhance photocatalytic activity spectra area of the TiO 2 based photocatalyst, and to separate and recycle photocatalyst easily, magnetic photocatalyst was prepared with β-NaYF 4 :Yb 3+ ,Tm 3+ , TiO 2 , Fe 3 O 4 as carriers, and tetraethyl orthosilicate as precursor. The magnetic infrared responsive photocatalysts were thoroughly characterized by field emission scanning electron microscopy, X-ray diffraction, a fluorescence spectrometer and UV–Vis–NIR diffuse reflectance spectroscopy. They showed that the composite of β-NaYF 4 :Yb 3+ ,Tm 3+ /TiO 2 /Fe 3 O 4 @SiO 2 (UCTFS) emits visible luminescence upon 980 nm excitation, and energy transfer from β-NaYF 4 :Yb 3+ ,Tm 3+ to TiO 2 was verified. The photocatalytic activities of the UCTFS were studied by orthogonal experiments for photodegradating methylene blue (MB). The degradation rate of MB can reach 86.69% under the optimal conditions. After the four recycles, the degradation rate remained 52.72%. It also showed that 50.27% of the degradation efficiency of phenol can be obtained under the same experimental parameters. These results suggest that magnetic UCTFS composite is stable and a magnetic NIR-driven photocatalyst for degradation of organic pollutants. Moreover, the NIR driven photocatalytic mechanism of this reported composite was proposed. The strategy suggested here may be indicated for the effective fabrication of magnetic NIR-driven photocatalyst for application in the water purification by full spectra of solar energy.
研究领域:
材料科学
·
环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）