Materials Science & Engineering C-Materials for Biological Applications
·
2016
·
IF 3.42
Huiqiong Yan,Xiuqiong Chen,Jia Shi,Zaifeng Shi,Wei Sun,Qiang Lin,Xianghui Wang,Zihao Dai
The rare earth ion doped upconversion nanoparticles (UCNPs) synthesized by hydrophobic organic ligands possess poor solubility and low fluorescence quantum yield in aqueous media. To conquer this issue, NaYF 4 :Yb 3 + /Tm 3 + UCNPs, synthesized by a hydrothermal method, were coated with F127 and then assembled with chitosan to fabricate the chitosan/NaYF 4 :Yb 3 + /Tm 3 + composite beads (CS/NaYF 4 :Yb 3 + /Tm 3 + CBs) by Pickering emulsion system. The characterization results revealed that the as-synthesized NaYF 4 :Yb 3 + /Tm 3 + UCNPs with an average size of 20 nm exhibited spherical morphology, high crystallinity and characteristic emission upconversion fluorescence with an overall blue color output. The NaYF 4 :Yb 3 + /Tm 3 + UCNPs were successfully conjugated on the surface of chitosan beads by the gelling of emulsion droplets. The resultant CS/NaYF 4 :Yb 3 + /Tm 3 + CBs showed good upconversion luminescent property, drug-loading capacity, release performance and excellent biocompatibility, exhibiting great potentials in targeted drug delivery and tissue engineering with potential tracking capability and lasting release performance.
研究领域:
材料科学
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生物医学工程
·
药物递送
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产品关联
DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2025
·
IF 4.2
Yuangong Ma,Youlin Huang,Wensheng Zhang,Zhishan Liang,Bo Ding,Dongfang Han,Dongxue Han,Li Niu
In the domain of photocatalysis, harnessing solar energy, particularly the near-infrared (NIR) spectrum, presents formidable challenges. To overcome these, a novel NIR-responsive photocatalyst, denoted as NYT@ZnO@RGO@Ag, was meticulously crafted. This photocatalyst comprises a NaYF4: Yb3+, Tm3+@ZnO structure supported on reduced graphene oxide (RGO) and further composited with silver nanoparticles. It was rigorously evaluated for its performance in photodegrading tetracycline (TC) antibiotics as a model compound. Leveraging the unique properties of upconversion materials, wide bandgap semiconductors, and localized surface plasmon resonance (LSPR), the NYT@ZnO@RGO@Ag catalyst exhibited an impressive photodegradation rate of 93.6% for TC under NIR light exposure. This efficiency surpassed that of NYT@ZnO (38.2%) and NYT@ZnO@RGO (72.3%). The remarkable enhancement in NIR-driven photocatalysis observed in NYT@ZnO@RGO@Ag is primarily attributed to the efficient process of fluorescence resonance energy transfer (FRET) from NYT to its each component. This process enhances photo-induced carrier generation and facilitates efficient transfer and energy utilization under NIR irradiation. The present study offers a promising approach for NIR-driven photocatalytic degradation of pollutants in environments with limited light exposure or even under dark conditions.
研究领域:
环境科学
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材料科学
·
光催化技术
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 6
·8149-8156
·
IF 2.478
Yun Rui,Luo Li,He Jingqi,Wang Jiaxi,Li Xiaofen,Zhao Weiren,Nie Zhaogang
Lanthanide-doped system with adjustable multicolor and white up-conversion (UC) emission has been developed in GdVO 4 (GVO): Tm 3+ -Ho 3+ -Yb 3+ /-Nd 3+ phosphors, which are fabricated via a facile solid-state reaction. Herein, we study their phase structures and the Ho 3+ concentration effect on their up-conversion emission. Under 980 nm excitation, the Tm 3+ -Ho 3+ -Yb 3+ tri-doped GVO phosphors exhibit intense luminescence combined with red, green and blue (RGB) emission and the successive energy transfer between Tm 3+ -Ho 3+ -Yb 3+ ions causes a slight shift in the color coordinates of samples with different doping concentrations. Under 808 nm excitation, the color coordinate of the optimum GVO: Tm 3+ -Ho 3+ -Yb 3+ -Nd 3+ phosphor is located at (0.3277, 0.3433), which is closest to the ideal white light emission corresponding to (0.3333, 0.3333). Therefore, it is proved that these phosphors provide potential applications in the fields of displays, lasers and optical telecommunication.
研究领域:
材料科学
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光学
·
光子学
✓ 已验证
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2022
·Vol. 19
·期 6
·3358-3366
·
IF 2.328
Hongqiang Cui,Yongze Cao,Ying Li,Lei Li,Yuhang Zhang,Guojian Li,Yichao Wang,Xiangping Li,Baojiu Chen
A series of Sr 2.99-x (PO 4 ) 2 :.01Er 3+ /xYb 3+ ( x = .02, .04, .06, .08, .10) phosphors in the presence of impurity Tm 3+ were synthesized by high temperature solid-state method, and X-ray diffraction results show that these samples are pure R-3 m(166) space group phase. The upconversion luminescence (UCL) of Er 3+ and impurity Tm 3+ under 980-nm laser excitation were investigated, and the results show that the intense blue UCL of impurity Tm 3+ and thermal enhancement of 2 H 11/2 → 4 I 15/2 of Er 3+ simultaneously exist. When Er 3+ doping concentration is kept at .01, both the blue UCL intensity of impurity Tm 3+ and green and red UCL intensity of Er 3+ reach the maximum at Yb 3+ doping concentration of .08. The thermal enhancement effect of 2 H 11/2 → 4 I 15/2 of Er 3+ was observed as high as 3.27 times from 303 to 723 K, which is because of lattice distortion and phonon-assisted transition. In addition, the optical temperature performance of Sr 2.91 (PO 4 ) 2 :.01Er 3+ /.08Yb 3+ sample was studied, and the maximum absolute temperature sensitivity was calculated as .00623 K −1 at 538 K. This study suggests that Sr 3 (PO 4 ) 2 :Er 3+ /Yb 3+ phosphors in the presence of impurity Tm 3+ have a promising application prospect as optical temperature sensor at high temperature.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2024
·Vol. 13
·期 3
·037004
·
IF 1.8
Aierpati Taximaimaiti,Aierken Sidike,Halizati Abulimiti,Qingling Wang
In this paper, a SrAl2Si2O8:Tm3+,Yb3+ upconversion (UC) phosphor was prepared with a high-temperature solid-phase method, and proved that the strontium feldspar structure was an excellent UC matrix. The Tm3+ were shown to have a maximum relative thermometric sensitivity (Sr) of 1.67% K−1 at 298 K and a maximum absolute thermometric sensitivity (Sa) of 1.34% K−1 at 573 K. The non-thermally coupled energy level corresponded to the maximum relative thermometry sensitivity (Sr) of 2.4% K−1 at 298 K and a maximum absolute sensitivity (Sa) of 13% K−1 at 423 K. The use of the fluorescence intensity ratio of the nonthermally coupled energy levels of Tm3+ for temperature measurements improved the temperature measurement sensitivity of the same material. These results indicated that the phosphor has good temperature sensing performance with a wide sensing range and good stability and has potential thermometry applications in the first biological window.
研究领域:
材料科学
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光学
·
生物医学工程
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 24
·19477-19489
·
IF 2.779
Zhao Jianwen,Dong Jun,Zhou Jian,Wang Linsheng
White light-emitting diodes (WLEDs) are of paramount importance in the development of lighting and display in replace of inefficient fluorescence as well as incandescent lamps. In this work, Tb 3+ , and Tm 3+ were both introduced into a novel phosphate host Ca 9 Nd(PO 4 ) 7 . The X-ray diffraction (XRD) analyses make sure that the materials have been synthesized successfully. Further XRD Rietveld refinements were used to shed light on the site preference and the variations of crystal lattice parameters. Strong blue light emission was observed after careful optimization of the doping concentration. Theoretical computation on the basis of density functional theory checks the reliability of the phosphate host for doping luminescent centers. At last, a near-ultraviolet commercial LED chip was used with these materials to make a prototype WLED device. They possess a highly stable warm white light emission upon various driving currents (color temperature is constant 4000 K). The work has shown intriguing prospects of Ca 9 Nd(PO 4 ) 7 : Tm 3+ , Tb 3+ in lighting and display applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Huocheng Lv,Peng Du,Weiping Li,Laihui Luo
To settle the challenges of optical thermometry with high sensitivity, a series of Tm3+/Yb3+-codoped Y2Mo3O12 (YMO:Tm3+/2xYb3+) submicron particles were developed via a sol–gel route. Excited by 980 nm, bright upconversion (UC) emissions of Tm3+ are observed, in which the optimum intensity is realized when the Yb3+ concentration is 13 mol %. Moreover, the UC mechanism of the emissions originating from the 1G4 level is a three-photon absorption process, while that of the emission from the 3F2,3 level is a two-photon absorption process. Furthermore, thermally enhanced emission intensities are realized in the studied compounds due to the negative thermal expansion effect. Notably, owing to the coexistence of improved energy transfer and cross-relaxation processes at elevated temperature, the intensities of the UC emissions from the 1G4 level increase and then decrease with raising the temperature, whereas that of the UC emission from the 3F2,3 level is enhanced monotonously as temperature increases. Via analyzing the inconsistent thermal quenching characteristics of the UC emissions, we explored the thermometric behaviors of the synthesized products and found that their sensitivities are dependent on the spectral mode. Through investigating the dependence of the emission intensity rate of the emissions from 3F2,3 → 3H6 to 1G4 → 3F4 transitions on temperature, one knows that the maximum absolute and relative sensitivities of the resultant submicron particles are 0.198 K–1 and 3.27% K–1, respectively. Additionally, the thermometric behaviors of YMO:Tm3+/2xYb3+ submicron particles can also be manipulated via altering the Yb3+ concentration.
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
·
2025
·
IF 2.8
Chen Fan,Xiangping Li,Yan Li,Jiani Luo,Lei Li,Hongquan Yu,Baojiu Chen
Bi 2 Mo 2 O 9 : Yb 3+ /Tm 3+ /Ho 3+ phosphors were synthesized via solid-state reaction method. Structural characterization confirmed phase purity and effective rare-earth incorporation into the host lattice. Under 980 nm excitation, the materials exhibited distinct emission bands corresponding to Tm 3+ (477 and 690 nm) and Ho 3+ (542 and 657 nm). Through optimization of Ho 3+ concentration (0.5 mol%), white-light upconversion emission was obtained with CIE 1931 coordinates of (0.3147, 0.2805). Using fluorescence intensity ratio technique based on non-thermally coupled energy levels of Tm 3+ ( 1 G 4 ) and Ho 3+ ( 5 F 5 ), it was found that the material had excellent temperature sensing performance, achieving maximum sensitivities of 21.74 %K −1 (absolute) and 1.892 %K −1 (relative). Remarkably, the material exhibits temperature-dependent chromaticity shifts from white (303 K) to yellow (483 K), enabling visual temperature indication. The findings demonstrate that Bi 2 Mo 2 O 9 : Yb 3+ /Tm 3+ /Ho 3+ phosphors exhibit promising prospects in optical thermometry and thermally-responsive luminescent devices, particularly in scenarios where thermally-driven color variations are advantageous or tolerable.
研究领域:
材料科学
·
光学物理
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纳米技术
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固态照明
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温度传感
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Hang Liu,Ziyi Zhang,Jian Liu,Kailin Wang,Yuhong Zhang
In this paper, the upconversion(UC) and downshifting(DS) luminescence and thermal sensing performances of the CaIn 2 O 4: RE 3+ /Tm 3+ /Yb 3+ (RE=Er, Ho) phosphors are investigated in detail. The bright UC emission bands from 450 to 900 nm and the DS luminescence bands from 1000 to 1700 nm are obtained under 980 nm excitation. The typical near infrared(NIR) emisson band(∼1550 nm) of Er 3+ ions and the NIR emission band(∼1200 nm) of Ho 3+ ions are gained. The temperature sensing features of CaIn 2 O 4: RE 3+ /Tm 3+ /Yb 3+ (RE=Er, Ho) phosphors are investigated with the luminescence intensity ratio (LIR) technique. The results indicate that the maximum relative sensitivity (S Rmax ) of CaIn 2 O 4: Er 3+ /Tm 3+ /Yb 3+ sample reaches 1.576% K -1 at 313 K, and the S Rmax of CaIn 2 O 4: Ho 3+ /Tm 3+ /Yb 3+ sample reaches 0.797% K -1 at 353 K in UC range. In addition, the higher temperature measuring sensitivities have been obtained in NIR-II region with the DS luminescence of CaIn 2 O 4: RE 3+ /Tm 3+ /Yb 3+ phosphors. The above results indicate that the CaIn 2 O 4: RE 3+ /Tm 3+ /Yb 3+ phosphors show bright emission bands in visible and NIR-II, and higher sensitivity for temperature measurement. The CaIn 2 O 4: RE 3+ /Tm 3+ /Yb 3+ phosphors present great application in optical 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
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Chao Zhou,Denghao Li,Lei Lei,Gongxun Bai,Huanping Wang,Xianghua Zhang,Shiqing Xu,Jianrong Qiu
Multimodal luminescence has emerged as a promising solution in the realm of anti-counterfeiting techniques, which have gained global attention due to their association with information and data security. The conventional approach to achieving multimodal luminescence typically involves combining upconversion and downshifting luminescence, which necessitates the use of external excitation sources and costly detection equipment. Herein, we develop an anti-counterfeiting strategy based on the afterglow performance of NaLuF 4 : Gd, Tm nanoparticles after X-ray excitation. The X-ray-induced Frenkel defects-base traps ensnare electrons with low kinetic energy, resulting in the creation of persistent photon traps that are responsible for the temperature-dependent afterglow intensity. The dual-band and thermo-enhanced afterglow emission can encrypt information well according to our proof-of-concept experiment and the visible light signal can be successfully captured by a smartphone camera. These unique features of NaLuF 4 : Gd, Tm nanoparticles render them highly appealing for multilevel anti-counterfeiting applications.
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
Hao Ge,Zhuqing Sun,Xianye Wang,Chao He,Guanying Cao
All-inorganic CsPbX 3 (X = Cl, Br, I) quantum dots (QDs) exhibit exceptional optical properties, narrow full-width-at-half-maximum (FWHM) fluorescence emissions, and straightforward synthesis, rendering them great potential for applications in display, solid-state lighting, and related fields. However, their practical utilization was significantly hindered by rapid degradation and luminescence quenching. A robust strategy to enhance stability involves encapsulating QDs within a glass matrix via in situ crystallization. Concurrently, rare earth (RE) doping has emerged as an effective approach to optimize the optical performance of CsPbBr 3 perovskite QD-embedded glasses. Investigating the crystallization behavior of RE-doped CsPbBr 3 borosilicate glasses is crucial for advancing the development of high-performance RE-doped perovskite glass materials. Building upon this foundation, Tm 2 O 3 -doped CsPbBr 3 QD glass-ceramics with varying dopant concentrations were successfully fabricated. The incorporation of Tm 3+ ions modulated QD dimensions and bandgap structures, suppressed VBr defects, and potentially established energy transfer pathways, effectively enhancing the optical performance of the QDs. Compared with undoped counterparts, the optimized sample demonstrated a 118.83% enhancement in photoluminescence (PL) intensity, a photoluminescence quantum yield (PLQY) increased from 20.6% to 37.76%, and an extended fluorescence lifetime from 198.83 ns to 225.06 ns. Furthermore, encapsulation within the borosilicate glass matrix significantly improved the temporal stability, aqueous stability, thermal stability, and photostability of CsPbBr 3 QDs. These superior properties position Tm 3+ -doped CsPbBr 3 QDs@glass composites as ideal candidates for high-performance lighting, wide-color-gamut displays, and fingerprint recognition technologies.
研究领域:
材料科学
·
光学材料
·
纳米技术
·
固态照明
·
显示技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yinhua Wang,Songchao Bai,Jie Sun,Hao Liang,Chao Li,Tianya Tan,Gang Yang,Jiwei Wang
Near-infrared (NIR) luminescent materials have been widely used in biomedicine, optical communication and other fields due to their unique photophysical properties. However, the development of efficient NIR luminescent materials is still a challenge. Herein, Sb 3+ , Tm 3+ co-doped Cs 2 NaYCl 6 double perovskite single crystals (SCs) have been synthesized. Benefiting from the crystal structure and rare earth lattice of rare earth-based double perovskite host, lanthanide ions can be doped effectively, and the optimal NIR photoluminescence quantum yield (PLQY) of Cs 2 NaYCl 6 :Sb 3+ , Tm 3+ SCs is up to 20.2%. The energy transfer mechanism was systematically surveyed by steady-state spectroscopy. Furthermore, a compact visible and NIR light emitting diode was fabricated by coating Cs 2 NaYCl 6 :Sb 3+ , Tm 3+ SCs on a commercial 320 nm LED chip. This light source has a promising application prospect in multifunctional lighting.
研究领域:
材料科学
·
光学
·
生物医学工程
✓ 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）