Journal of Physical Chemistry C
·
2023
·
IF 3.7
Song Jia,Ming Liu,Xinhu Liang,Xiaojuan Li,Xuefei Wang,Zhiyuan Tian
Lanthanide-doped upconversion nanoparticles (Ln-UCNPs) hold great potential in anticounterfeiting applications owing to their salient optical properties. However, a single-mode anticounterfeiting strategy based on common Ln-UCNPs typically confronts challenges in terms of imitation based on alternatives with a similar luminescence feature. Multilevel anticounterfeiting strategies on the basis of the multicolor beaconing luminescence generated upon dual- or multimode excitation are promising for addressing such a challenge and those based on the intrinsic mutual authentication of the dynamic signals generated via distinct manipulating manners are expected to present a higher security level. Herein, we demonstrate that low-concentration Yb/Er/Tm-codoped UCNPs with optimized formulation enable modulation of luminous color by manipulating the power of a continuous-wave 980-nm laser or the pulse parameter of the pulsed laser. The crucial role of acting as the red-emission-associated transient energy trapping center that Tm3+ species plays can be attenuated by Yb3+-mediated laser-power-dependent sensitization processes. The key intermediate states associated with red and green emission states are populated and deplete via different processes with distinct rates, which enables dependence of the emission feature on the pulse parameters of the laser. The unique feature of this type of Ln-UCNPs in terms of dual-mode luminous color modulation and its potential are preliminarily verified in our proof-of-concept cross-correlation experiment, which provides a feasible modality for high-level anticounterfeiting applications in specific scenarios such as high-value marketable securities and bond certificates.
研究领域:
材料科学
·
光学
·
纳米技术
·
安全与密码学
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DOI
高影响因子
CRYSTENGCOMM
·
2020
·Vol. 22
·期 26
·4438-4448
·
IF 3.117
Dongxun Chen,Liangliang Zhang,Yanjie Liang,Weili Wang,Shao Yan,Jianqiang Bi,Kangning Sun
Yolk–shell structured Bi2SiO5:Yb3+,Er3+ upconversion nanophosphors have been successfully synthesized via a simple template-assisted route, in which the reaction of Yb3+/Er3+ co-doped bismuth precursor nanospheres with the silica capping layer in situ is ingeniously designed and controlled. The phase transition and morphology evolution are investigated in detail by X-ray powder diffraction and high-resolution electron microscopy to propose the formation mechanism of the yolk–shell nanostructure. The yielded Bi2SiO5:Yb3+,Er3+ nanophosphors can emit bright green upconversion luminescence under the excitation of a 980 nm laser diode, which enables them to be promising emitters for optoelectronic devices. The potential of the Bi2SiO5:Yb3+,Er3+ nanophosphors as an optical nanothermometer is also demonstrated. The proposed facile synthetic route, unique yolk–shell nanostructure and good upconversion luminescence performance lead the way to access these lanthanide-doped Bi2SiO5 nanophosphors for applications in biotechnology and optoelectronic devices.
研究领域:
材料科学
·
纳米技术
·
光电技术
·
生物技术
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Junyu Dong,Shuqi Feng,Jie Shao,Lixuan Huang,Lin Xiang,Xuemei Zhou
Bacterial biofilm-induced inflammation can corrode implant surfaces and is the main reason for implantation failures. Considering that conventional mechanical treatments show limited efficacy, prolonged antibiotic therapy carries certain risks as well. Here, we developed NIR-active antibacterial Ti implant surfaces. LiYbF4-based core–shell upconversion nanoparticles (UCNPs) were synthesized with controlled core size (∼10 nm) and shell thickness (∼2 nm). These UCNPs were homogeneously coated onto sandblasted and acid-etched titanium (SLA Ti) implants by ultrasonic spraying following the prior deposition of a conformal polydopamine (PDA) coating. Upon NIR excitation (λ = 980 nm), the UCNPs generate upconverted ultraviolet (UV) light, which can be absorbed by PDA and natural TiO2 layers on Ti implants. The PDA layer not only mediates localized energy transfer but also enhances light absorption through the aromatic structures. Both in vitro and in vivo experiments demonstrated excellent biofilm eradication rate (98.9% in vitro and 99.99% in vivo) and potentially high biocompatibility. This approach combines the high efficiency of LiYbF4 core–shell UCNPs with PDA, providing antibacterial functionality based on photoelectron therapy on Ti implants. The deep-tissue penetration of NIR light and the localized UV generation minimize off-target effects, making this system a promising and clinically translatable strategy for infection-resistant implants.
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PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 19
·10889-10896
·
IF 3.049
Xinxin Yan,Tiesheng Li,Linna Guo,Honglei Li,Penglei Chen,Minghua Liu
Pure cubic phase and uniform BiF3:Ln3+ (Ln = Ho, Er, Tm)/Yb3+ nanoparticles (NPs) were prepared by coprecipitation. The growth mechanism of BiF3:2%Er3+/20%Yb3+ NPs was proposed based on evolution analysis of the time-dependent morphology, in which BiF3:2%Er3+/20%Yb3+ was formed through the growth process of “nucleation to crystallization and Ostwald ripening”. The upconversion luminescence (UCL) properties and mechanism of BiF3:Ln3+ (Ln = Ho, Er, Tm)/Yb3+ under dual-wavelength excitation were also systematically investigated. The emission intensity of BiF3:2%Er3+/20%Yb3+ by dual-wavelength excitation (λ = 980 nm + 1550 nm) was 1.49 times more than that excited by 1550 nm or 980 nm individually. Furthermore, the properties of the bright white and multicolor UCL showed that yellow, purple, green, or pinkish light could be observed by controlling the doping concentration of Ln3+ (Ln = Yb, Er, Tm, and Ho), indicating that they had potential applications in backlight sources of color displays and security labeling. The temperature sensitivity of BiF3:2%Er3+/20%Yb3+ exhibited a downward tendency and its max value was about 0.0036 K−1 at 273 K. Cell toxicity tests showed that the UCNPs in phospholipid aqueous solution presented low cytotoxicity. Also, in vivo imaging and X-ray imaging revealed that the BiF3:2%Er3+/20%Yb3+ NPs had deep penetration and high contrast, which meant it could be used as a potential probe and contrast agent in in vivo optical bioimaging.
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高影响因子
MOLECULES
·
2026
·Vol. 31
·期 19
·3412
·
IF 5.1
Xinyao Su,Wen Guo,Qunming Zhou,Tingting Xie,Lingyan Wu,Shangyang Wang,You Fu,Shurong Li,Wei Peng,Peijun Meng
Cancer theranostics urgently demands multifunctional nanomaterials capable of simultaneously enabling high-sensitivity imaging and multimodal synergistic therapy. In this study, a three-layer core–shell nanocomposite, NaYF4:Yb,Tm@NaGdF4:Eu@NH2-MIL-53(Fe), was designed and synthesized. The NaYF4:Yb,Tm nanoparticle core provides upconversion luminescence upon near-infrared (NIR) excitation and can serve as an excitation source for photodynamic therapy. An epitaxially grown NaGdF4:Eu intermediate shell was introduced to enhance luminescence and provide T1-weighted magnetic resonance imaging (MRI) capability. The outermost NH2-MIL-53(Fe) metal–organic framework shell was subsequently coated to provide potential chemodynamic therapy (CDT) capability. The effects of the Eu3+doping concentration, reaction temperature, reaction time, and oleic acid (OA)/1-octadecene (ODE) ratio on the anisotropic growth into a dumbbell-like morphology were examined to determine the optimal conditions. Under the optimal conditions (10 mol% Eu3+, 300 °C, 60 min, OA/ODE = 4:16), core–shell nanocrystals with regular morphology, uniform size, and the strongest upconversion luminescence were obtained. Polyvinylpyrrolidone (PVP)-mediated surface functionalization successfully induced the in situ growth of the NH2-MIL-53(Fe) outer shell, thereby constructing a three-layer core–shell nanocomposite as a potential theranostic platform. Various characterizations confirmed that the resulting composite integrates upconversion luminescence, paramagnetism, and hydroxyl radical generation capability, suggesting potential for NIR-driven dual-modal imaging-guided synergistic therapy.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Chaochao Tao,Songsong Ding,Shengqian Wang,Lin Liu,Houfa Mao,Genyuan Chen,Hualan Xu,Chongfeng Guo,Shengliang Zhong
Multicolor emission has long been a critical scientific challenge in the field of persistent luminescence (PersL) materials, with the achievement of multicolor PersL emission within a single host matrix representing a primary research objective. Herein, a new and effective method of using coordination polymers (CPs) as precursors is designed to synthesize multicolored CdSiO 3 :RE 3+ (RE = Pr, Sm, Eu, Tb, Tm) PersL materials. Through variation of rare earth dopants, we successfully achieved color-tunable PersL emission spanning brown, pink, purple, red, green, and blue spectra. The influence of RE 3+ dopants on the crystal structure, morphology and optical properties are studied in detail. Notably, this straightforward synthesis strategy enabled the effective production of nanospherical particles exhibiting regular morphology and uniform size distribution. The electronic band structure of the material was theoretically analyzed using density functional theory (DFT) calculations. Combined with thermoluminescence (TL) measurements were performed to elucidate the underlying PersL mechanism. To demonstrate practical applications, we designed a dynamic anti-counterfeiting pattern and evaluated the potential utility of CdSiO 3 :RE 3+ materials. This study not only enhances our fundamental understanding of CdSiO 3 -based PersL materials, but also provides novel insights into morphology and size control strategies that could be extended to other PersL material systems.
研究领域:
材料科学
·
光学
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DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2024
·
IF 2.2
Li Yunkai,Wang Lige,Yang Ruizhi,Liang Li,Luan Qingdong,Liu Jing
Copper selenide (Cu 2 Se) has attracted extensive research interest in the field of thermoelectricity due to its large abundance of constituent elements, environmental friendliness, and excellent thermoelectric properties. In this study, a facile and low-cost hydrothermal synthesis method combined with vacuum sintering was used for Cu 2 Se-based sample preparation, and the possibility of improving the thermoelectric properties of Cu 2 Se by doping with rare earth elements (Tm, Er, Lu) was explored using experimental tests and density functional theory calculations. The electronic structure calculations show that the electrical conductivity is increased due to the increased electron density after rare earth element doping. At the same time, the sharp increase in the density of states at the Fermi level after rare earth element doping enhances the Seebeck coefficient of the Cu 2 Se matrix. The experimental results show that the thermoelectric properties of all the samples doped with rare earth elements (Tm, Er, Lu) were improved compared to the Cu 2 Se matrix. The doping of rare earth elements led to an increase in point defects and the formation of pores in the samples, which play an important role in reducing the thermal conductivity. Among them, the Tm-doped Cu 1.995 Tm 0.005 Se sample reached a maximum ZT value of 0.80 at 773 K, which is a nearly 43% increase compared to the Cu 2 Se matrix (ZT max = 0.56).
研究领域:
材料科学
·
热电学
·
稀土元素
·
合成方法
·
计算材料科学
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DOI
高影响因子
Advanced Optical Materials
·
2024
·
IF 8
Shanshan Zhao,Dechao Yu,Benchun Li,Saima Kanwal,Tiantian Shen,Jincheng Wu,Songlin Zhuang,Dawei Zhang
The development of blue/green/red tricolor upconversion (UC) phosphors under invisible light irradiation has attracted significant interest in emerging applications such as anti-counterfeiting, three-dimensional (3D) optical data storage, and solid-state 3D displays. In this study, a series of LiYO 2 :RE 3+ ,Yb 3+ (RE = Tm, Ho, Eu) phosphors are successfully prepared via first precipitation process followed by calcination, and completely optimized for efficient tricolor UC luminescence with 980 nm laser excitation. Mechanisms involving two- or three-photon absorption processes and low-phonon-energy-suppressed multi-phonon relaxation have been proposed for Ho 3+ (Eu 3+ )/Yb 3+ and Tm 3+ /Yb 3+ codoping, respectively. In addition, the RE 3+ (Yb 3+ ) concentration-induced phase transition of the LiYO 2 host is discussed for interesting possibilities in spectral regulation. Based on the broad color gamut achieved by the tricolor UC phosphor mixture, homochromatic and polychromatic metamerisms are experimentally fabricated via screen printing for high-level anti-counterfeiting and information security. Moreover, for a proof-of-concept demonstration, prototypes of 3D optical data storage and volumetric displays are constructed by embedding tricolor UC mixtures and their 3D printed patterns in polydimethylsiloxane. It is believed that the continuous exploration of tricolor UC under invisible light excitation for metamerism anti-counterfeiting and 3D displays can promote the development of high-level information security and advanced volumetric display technologies.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 26
·6512-6520
·
IF 5.256
Mengxiao Li,Weijing Yao,Jun Liu,Qingyong Tian,Li Liu,Jin Ding,Qingwen Xue,Qiang Lu,Wei Wu
Rare-earth ion (RE3+) doped up-conversion (UC) fluorescent materials and novel fluorescent carbon quantum dots (CDs) have been widely used as traditional anti-counterfeiting materials owing to their excellent optical properties. The drawbacks of these materials are being exposed gradually with the widespread occurrence of counterfeit products in the market because of their single fluorescence mode and easy replication. In this work, we propose a novel strategy to combine both luminescent materials with different modes via a facile solvothermal method. Interesting, the composite materials show unalterable down-conversion (DC) blue light under a 365 nm ultraviolet (UV) analyzer, except for adjustable UC luminescence properties. The UC and DC optical properties are measured and the probable mechanism is proposed, indicating that the dual-mode fluorescence processes are separate and do not interference with each other. Moreover, we use a mixture containing a small number of UCMPs/CDs and poly(acrylic acid) (PAA) aqueous solution as a colorless anti-counterfeiting ink, and successfully print a variety of dual-mode fluorescence patterns through the screen printing technique, including QR codes, the logo of Wuhan University, and clover patterns. The composite materials show good dispersion and outstanding dual-mode fluorescence properties, suggesting that they are promising luminescent materials in the anti-counterfeiting field.
研究领域:
材料科学
·
光学
·
化学
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Peixiong Zhang,Enhui Wang,Chunyu Guo,Tao Yang,Xinmei Hou
High-entropy rare earth phosphates (HE REPO 4 , RE = Ho, Tm, Yb, Lu, Dy, Er and Y) with xenotime structure have been successfully synthesized and comprehensively characterized to evaluate their feasibility as thermal/environmental barrier coatings (T/EBCs) applied in SiC f /SiC ceramic matrix composites (SiC-CMCs). HE REPO 4 show good chemical compatibility with SiO 2 at 1400 °C and excellent high-temperature stability up to 1750 °C. The thermal expansion coefficient (TEC) of HE (6RE 1/6 )PO 4 is 5.9 × 10 −6 /°C ranging from room temperature to 900 °C, which is close to that of SiC-CMCs. Compared with single-component REPO 4 , the thermal conductivity of HE (6RE 1/6 )PO 4 (from 5.1 W·m −1 ·K −1 at 100 °C to 2.8 W·m −1 ·K −1 at 1300 °C) is significantly reduced benefiting from larger lattice distortion. These allow HE REPO 4 to be a potential candidate as T/EBCs applied in SiC-CMCs.
研究领域:
材料科学
·
陶瓷
·
涂层
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DOI
高影响因子
Science of Advanced Materials
·
2019
·Vol. 11
·期 6
·893-901
·
IF 1.158
Zhang Zhongtao,Zhang Guangkun,Ji Jingtian,Gao Zhonghui
Nuclear magnetic resonance imaging (MRI) has high image resolution and is widely used in the medical field, but it has the problem of inadequate sensitivity. Therefore, contrast material is needed to enhance the image clarity and accuracy of MRI. In order to further improve the cell
resolution of magnetic resonance imaging (MRI), a new contrast agent, BaYbF5/BaGdF5-Tm, Yb, is obtained by using BaYbF5 and BaGdF5 as the main raw materials and using high temperature thermal decomposition method. A layer of polyethylene glycol (PEG) is added to the material
from the point of view of biocompatibility. TEM and XRD are used to characterize the material, and MTT is used to test the cytotoxicity of the material. The material is used in the imaging process of stem cell-Danhong in the treatment of cerebral infarction. Bioluminescence imaging, immunofluorescence
testing and autoradiography are carried out. A large number of tests have confirmed that the material has low cytotoxicity and is similar to the existing contrast agents in MRI imaging. In bioluminescent imaging experiments, using BaYbF5/BaGdF5-Tm, Yb contrast agent can enhance the optical
density of imaging. In autoradiography test, using BaYbF5/BaGdF5-Tm, Yb contrast agent can clearly show the changes of various tissues. In immunofluorescence test, using BaYbF5/BaGdF5-Tm, Yb contrast agent can find more vascular proliferation cells survive. The new contrast agent proposed
in this study can enhance the imaging ability of MRI. Compared with conventional contrast agents, it has higher cell resolution and lower cytotoxicity. It has positive significance for future disease detection in medicine.
研究领域:
医学影像学
·
神经病学
·
材料科学
·
生物医学工程
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DOI
高影响因子
Journal of Energy Chemistry
·
2026
·
IF 15.6
Yifei Ye,Zhuoshen Huang,Hao Pan,Zhaokun Wang,Wei Xia,Guangtong Hai,Ge Wang,Xiubing Huang
Transition metal oxyhydroxides are crucial for the electrochemical oxidation of 5-hydroxymethylfurfural (HMF), though the co-adsorption and activation mechanisms of HMF and hydroxyl species require further clarification. This study designs cerium-doped Co-based layered double hydroxide (LDH) arrays, including 3%Ce-Co 3 Fe 1− x Al x -LDH/NF, to investigate Fe as a secondary active center and the role of Ce–O–TM (Transition metal) bridges in regulating HMF/OH − adsorption. Theoretical calculations indicate that Ce–O–TM bridges induce f – p – d gradient orbital coupling, optimizing HMF/OH − adsorption configurations and facilitating the HMF oxidation reaction (HMFOR). Synchrotron radiation characterization and in situ Raman spectroscopy reveal that Fe enhances electronic interaction between Ce and Co/Fe sites, strengthening the stability of M–O bonds, suppressing metal dissolution, and further optimizing reactant adsorption. Fe doping also modulates charge distribution and accelerates charge transfer. The optimized 3%Ce-Co 3 Fe 1 -LDH/NF delivers industrial current density (0.1 A cm −2 ) at 1.44 V RHE , with 98.1% HMF conversion, 99.6% FDCA yield, and 99.8% Faradaic efficiency. In an anion exchange membrane (AEM) electrolyzer, it achieves 0.5 A cm −2 at 2.1 V while maintaining high stability across 0.1–0.5 A cm −2 . These results provide an effective strategy for designing high-performance HMFOR catalysts through electronic structure modulation.
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高影响因子
危险品化学品经营许可证（带存储）