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
·
2020
·Vol. 20
·期 12
·7694-7697
·
IF 1.134
Liu Nian,Chen Xiao,Ma Xiaopeng
Sub-30 nm lanthanide-doped KLu2F7 upconversion (UC) nanorods were synthesized using a hightemperature coprecipitation method. Highly uniform morphologies, a small size distribution and the desirable orthorhombic crystalline phase was achieved by controlling the
reaction temperature; while control over the UC luminescence color was achieved by changing the dopant activator. Orthorhombic KLu2F7 nanorods showed excellent potential as a host phase for future UC luminescence materials in applications such as bioimaging.
研究领域:
材料科学
·
光学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF FLUORESCENCE
·
2020
·Vol. 30
·期 6
·1469-1476
·
IF 2.093
Yu Chenhong,Zhuang Qi,Cui Hanyue,Li Li,Ding Yaping,Lin Jiaxin,Duan Yingchun
This work established a novel and simple method for quantitative determination of curcumin by developing a “turn-off” fluorescence probe based on upconvert luminescent carbon dots (p-CDs). The carbon dots were synthesized with p-aminobenzoic acid (PABA) and ethanol by solvothermal method and had specific up-conversion luminescence properties which could be applied in other sensing fields. The sensing mechanism of this fluorescent probe was based on the inter filter effect (IFE) between p-CDs and curcumin. As the concentration of curcumin increased, the fluorescence of p-CDs could be selectively quenched. Under the optimal conditions, the fluorescence quenching intensity of p-CDs had a good linear relationship with curcumin in the range of 0.4–45 µΜ and the detection limit was 0.133 µM. In addition, the fluorescent “turn-off” probe constructed with p-CDs exhibited high accuracy and recovery in the analysis of real sample curry powder, indicating that the fluorescence “turn-off” probe had potential application for the detection of curcumin in the complex matrixes.
研究领域:
分析化学
·
药物分析
·
食品科学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2013
·Vol. 42
·期 34
·12101-12108
·
IF 3.806
Zhuo Wang,Jing Feng,Min Pang,Shunhao Pan,Hongjie Zhang
In this paper, uniform rice-shaped lanthanide doped BiPO4 upconversion submicron particles have been successfully synthesized via a facile room-temperature co-precipitation reaction and subsequent calcination route. The morphology, phase transformation and upconversion luminescent properties of synthesized submicron particles (SMPs) were characterized by using different analytical techniques such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), thermogravimetry-differential scanning calorimetry (TG-DSC) and upconversion luminescence (UCL) spectra. The transformation from hexagonal phase to monoclinic phase is crucial for upconversion luminescent properties due to the loss of water molecules in the lattice of hexagonal phase. With different variety and concentration of the dopant Ln3+ (Ln = Yb, Er, Tm and Ho) ions, the obtained samples present bright green, blue, and red upconversion emissions under a 980 nm continual wave laser diode excitation. Multicolor and bright white upconversion emissions have also been obtained by precisely adjusting the dopants concentration in the host lattice.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2023
·Vol. 34
·期 23
·235704
·
IF 3.5
Yanxing Wang,Wenjing Li,Yaqun Ma,Bo Hu,Xueli Chen,Ruichan Lv
In this research, a thermally activated upconversion luminescence (UCL) probe with ratiometric temperature sensing under 1064 nm and 808 nm excitation was designed. Especially, Nd3+, Tm3+ and Ce3+ were doped in rare earth nanoparticles (RENPs) as UCL modulators. By optimizing the elements and ratios, the excitation wavelength is successfully modulated to 1064 nm excitation with UCL intensity enhanced. Additionally, the prepared RENPs have a significant temperature response at 1064 nm excitation and can be used for thermochromic coatings. The intensity ratio of three-photon UCL (1064 nm excitation) to two-photon UCL (808 nm excitation) as an exponential function of temperature can be used as a ratiometric temperature detector. Therefore, this designed thermochromic coatings may enable new applications in optoelectronic device and industrial sensor.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF FLUORINE CHEMISTRY
·
2022
·
IF 2.226
Xuegang Zheng,Ying Chen,Shusheng Pan,Zhiyu Liu,Dekang Xu,Yueli Zhang,Hao Lin
In this paper, a range of Yb 3+ /Tm 3+ /Ho 3+ triple-doped NaYF 4 microcrystals (MCs) were successfully prepared by hydrothermal method and characterized by X-ray diffraction, which proved to be a hexagonal phase structure with uniformity. The morphology of NaYF 4 :20% Yb 3+ , 1% Ho 3+ MCs with different doping amounts of NaOH and citric acid were studied using scanning electron microscope, and the distribution of elements of this doping system was characterized by energy dispersive spectrometer. Upconversion luminescence (UCL) spectra of the MCs using a fluorescence spectrometer with 980 nm excitation were researched, and the results demonstrated that the tunable multi-color of the MCs can be achieved by varying the doping amount of different rare-earth ions. The UC mechanism of the MCs were systematically described. Li + doped the series MCs improved their UCL efficiency. By investigating the UCL the MCs of the Li + -doped system, the emission intensities of blue (450 nm, 475 nm), green (541 nm), and red (648 nm) light of the series MCs were increased by 2.75, 2.095, 2.65, and 2.87 times, which is of great significance for its application in light-emitting diodes and solar cells.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2025
·
IF 3.5
Daobin Zhu,Junshan Hu,Yuxiang Wu,Keyu Guo,Changchun Ding,Rangrang Fan,Chunfeng Dong,Wei Jin,Yongtao Liu
Er 3+ ions and Yb 3+ ions co-doped indium oxide (In 2 O 3 ) phosphors were successfully synthesized by high temperature solid phase method. At 980 nm laser excitation, the phosphor has weak 552 nm green and strong 661 nm red emission bands. And the upconversion luminescence (UCL) intensity of red light is significantly stronger than that of green light. They are attributed to the 4 S 3/2 → 4 I 15/2 and 4 F 9/2 → 4 I 15/2 transitions of Er 3+ , respectively. And the optimal sample is In 2 O 3 : 4 % Er 3+ , 10 % Yb 3+ . The appearance of phosphor was observed by field emission scanning electron microscopy. The UCL of phosphor is a two-photon process based on power dependence. In addition, photoluminescence excitation spectra and down-conversion luminescence spectra are used to explain the luminescence mechanism. The temperature sensing property of the phosphor in the temperature range of 348 K–598 K were tested. The sensitivity were obtained by fluorescence intensity ratio ( FIR ). The fit degree of FIR is 0.9936. It achieves a maximum relative sensitivity of 0.73 % K −1 at 348 K and a maximum absolute sensitivity of 0.039 K −1 at 373 K. In 2 O 3 : Er 3+ , Yb 3+ phosphors with high quality luminescence and excellent sensitivity have important application value in non-contact temperature measurement.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2016
·Vol. 3
·期 8
·1082-1090
·
IF 4.532
Min Li,Xiaoyang Liu,Li Liu,Bing Ma,Benxian Li,Xudong Zhao,Wenming Tong,Xiaofeng Wang
A series of Yb3+/Tm3+ co-doped β-NaYF4 (β-NaYF4:Yb,Tm) crystals have been successfully synthesized via the molten salt synthesis (MSS) method. A unique strong green emission of Tm3+ was observed, which cannot be obtained by any other method. The red, green and blue (RGB) light emissions have been obtained simultaneously in the presence of a single activator (Tm3+). The influencing factors of crystal growth have been studied in detail, in order to understand the change of the transition probabilities of Tm3+. Subsequent studies indicate that the RGB light emissions of Tm3+ can be effectively tuned by varying the concentration of sensitizers (Yb3+ and Mn2+) and the reaction time. Consequently, the effective multicolor upconversion (UC) luminescence was obtained, especially a strong white light, which was not obtained in the β-NaYF4:Yb,Tm system earlier. To our knowledge, it is the first time that the UC properties in the β-NaYF4:Yb,Tm system have been investigated by altering the transition probabilities at the same energy level of Tm3+.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2024
·Vol. 39
·期 14
·1989-1998
·
IF 2.7
Li Xin,He Yu,Guo Yangyang,Mao Huibing,Chen Ye,Wang Jiqing,Fang Weifeng
With the excitation of a 978 nm laser, upconversion emission of the NaMgF 3 : Tm 3+ , Yb 3+ , Mn 2+ submicron particles include two red emission bands located at 648 and 698 nm and a green emission at about 510 nm in the visible range. The experimental results confirm that the Mn 2+ ions play the key role in the emission modulation between the 648 nm and 698 nm. The incident laser power dependence confirms that the emission at 648 nm is completely different from the emissions at 698 nm, and more than 3 photons are involved in the emission at 648 nm. With the doping of Mn 2+ ions, the intensity ratio R 1 / R 2 of the emission at 648 nm and 698 nm increases first, and decreases for the Mn 2+ concentration larger than 2%. The incident laser power and laser pulse-width also have evident modulation effect of the UC emissions. All the Mn 2+ related phenomena are due to the energy transfer paths ET5 and ET6 between the Tm 3+ and Mn 2+ ions. Graphical abstract
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2024
·
IF 8
Changhe Hu,Xiao Li,Wenfeng Xie,Jie Liu,Huhui Fu,Yaning Zhang,Jingbing Lu,Qi Xiong,Yuanqi Qian,M. Liu
Alkaline zirconium fluorides (A x Zr y F x+y , A = Li, Na, and K), featuring unique crystallographic structures, have recently emerged as a class of attractive hosts for fabricating lanthanide (Ln 3+ )-doped upconversion nanocrystals (UCNCs) that exhibited distinct morphology, upconversion luminescence (UCL) performance, and physicochemical property. In this paper, for the first time the controlled preparation of Yb 3+ /Er 3+ -doped UCNCs is reported based on the trigonal Cs 2 ZrF 6 host, leading to tunable morphology and size of the resulting UCNCs by varying the reaction temperature and time. By further incorporating Na + ions into the Cs 2 ZrF 6 crystal lattice, sub-10 nm Yb 3+ /Er 3+ /Na + tridoped UCNCs with highly improved crystallinity and thus greatly enhanced UCL intensity are obtained. Moreover, these resulting UCNCs display abnormal thermal enhancement of UCL over a temperature range from 333 to 493 K, enabling the fabrication of supersensitive luminescent nanothermometers for temperature sensing. Based on the luminescence intensity ratio of two nonthermally coupled levels (i.e., 4 F 9/2 and 2 H 11/2 ) of Er 3+ , the as-prepared Cs 2 ZrF 6 :Yb/Er/Na UCNCs exhibit an extremely large absolute sensitivity of 177.3% K −1 and a considerably high relative sensitivity of 1.52% K −1 at 333 K. These results unambiguously demonstrate that Cs 2 ZrF 6 is a suitable host material for preparing small-sized Ln 3+ -doped UCNCs as nanothermometer for high-performance ratiometric temperature sensing.
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 THE AMERICAN CERAMIC SOCIETY
·
2024
·
IF 3.5
Xuekai Wang,Yongze Cao,Xianglan Yan,Guojian Li,Xiangping Li,Jinshu Zhang,Baojiu Chen
Hexagonal Er 3+ /Yb 3+ co-doped LaZrTa 3 O 11 (LZTO) phosphor was prepared by molten salt synthesis with B 2 O 3 flux. Holding temperature, holding time, solute and solvent ratio were regulated. The green upconversion luminescence (UCL) integral intensity of the optimal sample can reach 29.2% of β-NaYF 4 :Er 3+ /Yb 3+ under 980 nm laser excitation. This outstanding pure green UCL is due to the low phonon energy, Er 3+ /Yb 3+ monolayer (2D) distribution, asymmetry of Er 3+ /Yb 3+ doped lattice sites, and low oxygen vacancy. The maximum relative temperature sensitivity attains 0.01221 K −1 at 303 K by employing luminescence intensity ratio (LIR) technique. LZTO:Er 3+ /Yb 3+ phosphor can be used in 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
Inorganic Chemistry Frontiers
·
2024
·Vol. 11
·期 15
·4721-4730
·
IF 6.1
Sixia Li,Peng Zhang,Zhenbing Wang,Yuzhu Yang,Xuan Miao,Weisheng Liu
Multicolor and multimodal luminescence materials play crucial roles in anti-counterfeiting and encryption technologies due to their attractive properties of colorful, visually identifiable emissions and distinct emission modes in various excitation or stimulus channels. Nevertheless, integrating multicolor and multimodal luminescence via single rare-earth doping based on a single matrix remains a significant challenge. Herein, the Er3+ single-doped NaGdTi1.8Al0.2O6 double perovskite material achieves multicolor luminescence, afterglow, and upconversion emission by responding to several types of excitation ranging from UV to NIR and thermal disturbance. Spectral analysis has revealed that the varying excitation efficiency of the two luminescence centers at various excitation wavelengths leads to a shift in the overall emission color from red to green as the excitation wavelength transitions from 250 nm to 390 nm. Additionally, the energy transfer process between defect levels and Er3+ leads to multicolor luminescence from green to orange within a temperature range of 217 K to 417 K. These findings offer a facile and unique strategy for designing highly integrated multicolor and multimodal luminescence in a single matrix and promise applications in advanced anti-counterfeiting and information encryption technology.
研究领域:
材料科学
·
光学
·
防伪技术
✓ 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）