JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Yafen Wu,Sheng Wu,Puxian Xiong,Shouping Wang
Mechanoluminescence (ML) materials have made significant progress in flexible sensing and human–computer interaction due to their unique “force-to-light” conversion properties. However, most ML materials are limited to the visible light spectral band and single triggering mechanisms, limiting their practical applications in bioimaging and medical non-destructive detection. Here, a near-infrared (NIR) ML material Sr 3 Sn 2 O 7 :0.01Nd 3+ with multi-mode physical stimuli response is reported. Under friction and compression mechanical stimuli, the ML intensity of Sr 3 Sn 2 O 7 :0.01Nd 3+ is linearly positively correlated with the applied load, showing excellent stress-sensing performance. At the same time, the Sr 3 Sn 2 O 7 :0.01Nd 3+ ML material can penetrate different biological tissues up to 10 mm thick and realize the non-destructive detection of components in various transparent liquids. In addition, non-invasive blood lipid detection can be potentially obtained for patients through the absorption characteristics of oils and fats for NIR light signals. These research results indicate the broad application prospects of Sr 3 Sn 2 O 7 :0.01Nd 3+ in bioimaging, health monitoring, and non-destructive detection, and it provides a basis for developing new medical non-invasive detection technologies.
研究领域:
生物医学工程
·
分子影像学
·
材料科学
·
生物光子学
·
医学诊断技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Enjie He,Xiangxiao Chen,Yaqi Wu,Yinkang Cui,Tao Wang,Fangfang Li,Qingyan Han,Xuzhong Zuo,Nian Liu
This study presents the synthesis and characterization of efficient deep-red-emitting CaMg 2 La 2 W 2 O 12 :Mn 4+ , Nd 3+ (CMLW:Mn 4+ , Nd 3+ ) phosphors for application in light-emitting diodes (LEDs) designed for indoor plant cultivation. The phosphors were prepared via a high-temperature solid-state reaction and exhibited an orthorhombic structure with optimal luminescence properties at Mn 4+ (0.90 %) and Nd 3+ (0.60 %) doping concentrations. The enhanced performance of CMLW:0.90 %Mn 4+ , 0.60 %Nd 3+ over its Nd 3+ -free counterpart originates from three synergistic mechanisms: (1) Nd 3+ substitution for larger La 3+ induces lattice shrinkage, shortening the Mn 4+ -O 2- bond length and enhancing the crystal-field strength, thereby increasing the radiative transition probability of 2 E g → 4 A 2g emission at 708 nm; (2) Nd 3+ co-doping suppresses concentration quenching by increasing the critical distance between Mn 4+ ions, as evidenced by prolonged lifetime and higher optimal Mn 4+ concentration; (3) The optimal Nd 3+ concentration improves lattice rigidity while avoiding defect formation observed at higher doping levels. The resulting phosphor demonstrates intense deep-red emission matching the phytochrome P FR absorption band, excellent thermal stability (73.66 % intensity at 453 K), and a high internal quantum efficiency (IQE) of 86.80 %. A prototype LED device exhibits stable deep-red emission and a luminous efficacy of 0.10 lm/W under 365 nm excitation. These results position CMLW:Mn 4+ , Nd 3+ phosphor as a promising candidate for indoor plant cultivation LEDs.
研究领域:
材料科学
·
光学工程
·
农业光电子学
·
固体化学
·
光生物学
✓ 已验证
产品关联
DOI
高影响因子
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
·
2021
·
IF 4.527
Rui Yun,Jingqi He,Li Luo,Xiaohua Liu,Zhaogang Nie,Weiren Zhao,Hongli Wen
Upconverting materials excited by near-infrared light are getting attention due to their biological applications in cancer treatment. Er 3+ , Yb 3+ and Nd 3+ tri-doped LiLn(WO 4 ) 2 (Ln = Y/La/Gd) phosphors were synthesized via the typical solid-state method. LiGd(WO 4 ) 2 : Er 3+ , Yb 3+ , Nd 3+ (LGW) phosphors exhibit the most intense green emission under 785 nm excitation among the three doped host materials, which is ascribed to their lowest phonon density and the strong absorption properties. Nd 3+ and Yb 3+ concentration effect on its luminescent properties and the energy transfer of Nd 3+ →Yb 3+ →Er 3+ under 785 nm excitation are discussed. The ratio of integrated intensity from the 4 S 3/2 / 2 H 11/2 → 4 I 15/2 transition of Er 3+ is characteristic of the optical temperature sensing based on fluorescence intensity ratio (FIR). LGW shows high absolute sensitivity about 0.0070 K −1 at 439 K and broad temperature sensing ranging from 200 K to 600 K under the excitation of 785 nm compared with systems doped with Er 3+ . Our significant results predicate the potential applications of this lanthanum-doped tungstate in optical thermometers.
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
IONICS
·
2021
·Vol. 27
·期 6
·2707-2715
·
IF 2.817
Zhang Ziqi,Zhang Yan,Liu Yang,Zhang Siqi,Yao Kaida,Sun Yueqiu,Wang Xiangzhi,Huang Weimin,Liu Xiaobo
Metal-organic frameworks are well-aligned nanoporous crystals which can be applied to biomedical field, thanks to the large superficial area, ordered pores array, and biocompatible metallic ion composition. In this work, we fabricated a novel Nd 3+ ion-doped ZIF-8 since there are some reports showing that Nd 3+ has anti-carcinogenic properties and can be used for therapeutic application in aberrant angiogenesis recently. Therefore, we attempted to use electrochemical anodic oxidation and electrochemical in situ deposition techniques to produce coating which contains Nd 3+ on Ti implant. And then we detected the biotoxicity, antibacterial function, and corrosion resistance of this new coating so as to facilitate further research on Nd 3+ ion implantation in vivo. SEM and TEM were applied to observe the surface morphology. N 2 adsorption–desorption was used to investigate the specific surface area and pore structure. The XRD and XPS were carried out to investigate the compound surface including the chemical composition and element-bonding configurations. The corrosion resistance properties of the samples were tested by electrochemical method. ICP was conducted to investigate the release behavior.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2020
·Vol. 22
·期 8
·1359-1367
·
IF 3.117
Qinqin Shao,Chao Yang,Xiaoxu Chen,Hong Zhang,Guoying Feng,Shouhuan Zhou
Lanthanide doped hexagonal phase (β) rare earth fluoride (NaREF4) nanocrystals have considerable potential in laser and, especially, biological applications. However, their large size and extreme synthetic conditions have become unavoidable obstacles in their path to various applications. Herein, a core-mediated hetero-shell growth method was adopted to synthesize α-NaGdF4@β-NaLuF4:Nd3+ nanocrystals, in which cubic phase (α) NaGdF4 was used as the core to induce the subsequent growth of a β-NaLuF4:Nd3+ shell via a two-step solvothermal reaction. The resulting α-NaGdF4@β-NaLuF4:Nd3+ core–shell nanocrystals were characterized by structural analysis, photoluminescence spectroscopy and decay lifetime. Besides, a persuasive lattice-disordered heterointerface-induced mechanism was proposed to understand the core-mediated hetero-shell growth. Meanwhile, the influence of the heterointerface on the dynamic growth of the shell nanocrystals was also investigated in detail. Most importantly, the near-infrared luminescence intensity at 1.06 μm was enhanced by over two times via coating the lattice-matched homogeneous NaLuF4 shell on the surface of α-NaGdF4@β-NaLuF4:Nd3+ nanocrystals. The high-performance α-NaGdF4@β-NaLuF4:Nd3+ nanocrystals thus obtained are expected to be used for laser output and depth detection of biological tissues.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Tingting Liu,Hong Lei
Abrasive is one of the most important factors in chemical mechanical polishing (CMP). In order to improve the polishing qualities of sapphire substrates, the novel Nd 3+ -doped colloidal SiO 2 composite abrasives were prepared by seed-induced growth method. In this work, there were a series of condensation reactions during the synthesis process of Nd 3+ -doped colloidal SiO 2 composite abrasives and the silica cores were coated by shells (which contains SiO 2 , Nd 2 Si 2 O 7 and Nd(OH) 3 ) via chemical bonds and hydrogen bonds in the Nd 3+ -doped colloidal SiO 2 composite abrasives, which made the composite abrasives’ core-shell structure more sTable Scanning electron microscopy (SEM) showed that Nd 3+ -doped colloidal SiO 2 composite abrasives were spherical and uniform in size. And the acting mechanisms of Nd 3+ -doped colloidal SiO 2 composite abrasives on sapphire in CMP were investigated. Time-of-flight secondary ion mass spectroscopy (TOF-SIMS) analysis and X-ray photoelectron spectroscopy (XPS) analysis demonstrated that the solid-state chemical reactions between the shells (which contained SiO 2 , Nd 2 Si 2 O 7 and Nd(OH) 3 ) of Nd 3+ -doped colloidal SiO 2 composite abrasives and the sapphire occurred during the CMP process. Furthermore, Nd 3+ -doped colloidal SiO 2 composite abrasives exhibited lower surface roughness and higher material removal rate (MRR) than the pure colloidal SiO 2 abrasives in the same polishing conditions, which was attributed to the solid-state chemical reactions between shells of Nd 3+ -doped colloidal SiO 2 composite abrasives and sapphire.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Haixia Zou,Fengmin Jin,Xiaoyan Song,Jinfeng Xing
The introduction of a thick shell structure has been widely used to enhance the emission intensity of upconversion nanoparticles (UCNPs). However, a thick shell could increase the distance between UCNPs and photosensitizers, which is not favourable to the generation of singlet oxygen ( 1 O 2 ) in photodynamic therapy (PDT) due to the low fluorescence resonance energy transfer (FRET) efficiency. In this study, we used a facile method to prepare UCNPs that the emission intensity could increase with the shell thickness decreasing, which facilitated the efficient FRET between UCNPs and photosensitizers. In detail, the Nd 3+ -doped UCNPs with different dopant concentration of Yb 3+ were prepared and characterized firstly. The I r/g (intensity of red luminescence to green luminescence) was tuned to increase largely by precisely controlling Yb 3+ concentration in core-shell, which could make UCNPs effectively activate methylene blue (MB). Then, a unique procedure was used to prepare NaYF 4 :Yb/Er/Nd@NaYF 4 :Nd (Yb 3+ :30%) core-shell nanoparticles with different shell thickness by tuning the amount of the core. The upconversion luminescence (UCL) intensity of those UCNPs enhanced dramatically with the shell thickness decreasing. Furthermore, UCNPs and MB were encapsulated into SiO 2 nanoparticles. FRET efficiency between UCNPs and MB largely increased with the shell thickness of UCNPs decreasing. Correspondingly, the efficiency of 1 O 2 generation obviously increased. We provided a new method to optimize the UCL intensity and FRET efficiency at the same time to produce 1 O 2 efficiently.
研究领域:
生物医学工程
·
纳米医学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Jinlong Wang,Zihan Zhao,Yiping Wu,Chunwen Ye,Yanjie Zhang
Advanced fluorescent anticounterfeiting technology has received widespread attention due to the lack of sufficient security of traditional anti-counterfeiting. Hence, there is a great challenge to continuously develop multi-level anti-counterfeiting technology with higher security. Here, we develop a desired fluorescent anticounterfeiting technology based on CsPbBr3 perovskite quantum dots (PQDs) and CaAl2O4:Eu2+, Nd3+ composites with persistent luminescence properties. CsPbBr3 PQDs can be formed on the surface of the CaAl2O4 host and exhibit an average diameter of around 3.5 nm. The photoluminescence (PL) intensity of CsPbBr3 PQDs/CaAl2O4 composites is greatly enhanced to 125 times compared to that of pure CsPbBr3 PQDs, and the desired narrow FWHM of 19 nm is achieved under near-ultraviolet irradiation. Furthermore, highly stable CsPbBr3 PQDs/CaAl2O4:Eu2+, Nd3+ composites with triple-modal (UV, IR, and thermal) fluorescent anti-counterfeiting characteristics were developed and used in fabricating anti-counterfeiting labels through screen-printing technology. The results open up a pathway to enhance the photoluminescence properties and stability of perovskite quantum dots for the advanced fluorescent anticounterfeiting application.
研究领域:
材料科学
·
光电技术
·
化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Han Wang,Yongkuan Li,Man Yang,Peng Wang,Yueqing Gu
The exorbitant level of hydrogen peroxide is closely related to many human diseases. The development of novel probes for H2O2 detection will be beneficial to disease diagnosis. In this study, a novel Nd3+-sensitized upconversion nanoprobe based on Förster resonance energy transfer was first developed for sensing H2O2. This nanosystem was made of core–shell upconversion nanoparticles (emission at 540 and 660 nm), dicyanomethylene-4H-pyran (DCM)–H2O2, and poly acrylic acid (PAA)–octylamine. Obviously, upconversion nanoparticles (UCNPs) doped with Nd3+ acted as an energy donor, and DCM–H2O2, transferring to DCM–OH with the reaction of H2O2, acted as an energy acceptor. The ratiometric upconversion luminescence (540 nm/660 nm) signal could be utilized to visualize the H2O2 level, and the LOD of the nanoprobe for H2O2 was quantified to be 0.168 μM. Meanwhile, owing to the dope of Nd3+, the nanoprobe would not induce the overheating effect in biological samples and could possess deeper tissue penetration depth, compared with the UCNPs excited by 980 nm light during bioimaging. The nanoprobe could also play an important role in detecting the exogenous and endogenous H2O2 in living cells with ratiometric UCL (upconversion luminescence) imaging. Furthermore, our nanoprobe could function in detecting the H2O2 in a tumor-bearing mouse model. Therefore, this novel nanoprobe along with the ratiometric method for responding and bioimaging H2O2 could serve as a new model that promotes the emergence of novel probes for H2O2 detection.
研究领域:
纳米技术
·
生物医学工程
·
分析化学
·
生物成像
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LUMINESCENCE
·
2024
·Vol. 39
·期 7
·e4836
·
IF 3.2
Guoxiang Song,Chaogang Lou,Ruiqi Zhu,Han Diao,Bowen Shen
The near-infrared (NIR) down-conversion process for broadband sensitization has been studied in Eu 2+ -Nd 3+ co-doped BaAl 2 O 4 . This material has a broad absorption band of 200–480 nm and can convert photons in the visible region into NIR photons. The NIR emission at 1064 nm, attributed to the Nd 3+ : 4 F 3/2 → 4 I 11/2 transition, matches the bandgap of Si, allowing Si solar cells to utilize the solar spectrum better. The energy transfer (ET) process between Eu 2+ and Nd 3+ was demonstrated using photoluminescence spectra and luminescence decay curves, and Eu 2+ may transfer energy to Nd 3+ through the cooperative energy transfer (CET) to achieve the down-conversion process. The energy transfer efficiency (ETE) and theoretical quantum efficiency (QE) were 68.61% and 156.34%, respectively, when 4 mol% Nd 3+ was introduced. The results indicate that BaAl 2 O 4 :Eu 2+ -Nd 3+ can serve as a potential modulator of the solar spectrum and is expected to be applied to Si solar cells.
研究领域:
材料科学
·
光电技术
·
可再生能源
·
光子学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Yitong Lin,Taiyu Jin,Yu Liu,Jianhe Tang,Ying Tian,Xueke Liu,Liang Chen,Dawei Fang,Jun Wang
A coated Z-scheme NaGdF 4 :Nd 3+ ,Yb 3+ ,Tm 3+ @CdS-Pd@NiO photocatalyst with core-shell structure is prepared by hydrothermal and coprecipitation methods. NaGdF 4 :Nd 3+ ,Yb 3+ ,Tm 3+ as excellent up-conversion luminescent material can convert infrared light into visible light, broadening the light response range of CdS. Pd nanorods act as conductive channels and co-catalysts, leading to successful construction of titled photocatalyst, increasing contact area between two monomer photocatalysts, promoting transfer of photo-generated electrons. It also provides a large oxidation surface for organic pollutant degradation. The performance of prepared photocatalyst is assessed by Congo red degradation and hydrogen production . The emission spectrum and energy conversion mechanism of NaGdF 4 :Nd 3+ ,Yb 3+ ,Tm 3+ are investigated. The photocatalyst with 3:1 NaGdF 4 :Nd 3+ ,Yb 3+ ,Tm 3+ @CdS-Pd and NiO mass ratio has a preeminent activity. Congo red degradation ratio and hydrogen production amount reach 92.48% and 653.06 µmol/g, respectively, under simulated sunlight irradiation for 180 min. The possible mechanism of organic pollutant degradation with synchronous hydrogen production caused by titled photocatalyst is proposed.
研究领域:
材料科学
·
环境科学
·
光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）