JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Yuan Deng,Jianyong Wei,Junlu Sun,Yanan Zhang,Lin Dong,Chong-Xin Shan
Mechanoluminescent materials that could convert mechanical energy into light energy have attracted increasing attention in recent years for their wide potential applications in stress sensing and imaging, structural damage monitoring, wearable illuminating devices, self-powered display, mechanical energy collection and conversion. However, their relatively low mechanoluminescence intensity greatly hinders the practical application. Here, we present a simple and effective strategy to enhance the mechanoluminescence performance of ZnS :Mn phosphor by Li ion co-doping. ZnS:Mn,Li phosphors of the hexagonal wurtzite structure have been prepared via high temperature solid phase sintering . The PL and ML intensity have been enhanced by 338% and 610% for samples obtained when 4 and 5 at. % Li is introduced in the precursor materials, respectively, in comparison with those without Li dopant . The photoluminescence lifetime of ZnS:Mn,Li decreases gradually, indicating the enhanced non-radiative energy transfer as the Li concentration increases. The electron paramagnetic resonance spectroscopy is carried out to investigate the changing tendency of the sulfur vacancy of samples with various Li-doping concentration. The mechanism for mechanoluminescence enhancement is supposed to be correlated with the increased sulfur vacancies by Li co-doping, which may facilitates the non-radiative energy transfer and thereby improve the luminescence properties of the samples. These findings provide a feasible strategy to enhance the mechanoluminescence performance of traditional ZnS derived phosphors, and may contribute to developing novel mechanoluminescence materials for practical applications.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2024
·Vol. 35
·期 4
·1927-1936
·
IF 2.6
Feng Tian,Chen Zhenkun,Cheng Xiaomin
A novel nanocomposite fluorescent probe consisting of quantum dots and a silica molecularly imprinted polymer (MIPs-capped ZnS:Mn QDs) was synthesized and applied for the rapid detection of teflubenzuron (TBZ) based on the fluorescence quenching of a composite probe via TBZ. The fluorescence quenching efficiency of MIP@SiO2@ZnS:Mn QDs displayed a linear relationship over the concentration range of 0–26.24 μmol/L with a correlation coefficient of 0.9857 and the limit of detection was 2.4 μg/L. The selectivity test showed that the nanocomposite had good selectively rebind TBZ with higher imprinting factor of 3.06 compared with four structurally similar compounds. In addition, the probe was successfully applied to the detection of TBZ in vegetable samples with a recovery of 90.3~97.1% and with a relative standard deviation below 3.2%. This developed method has the advantages of simple preparation, fast response and low toxicity for trace TBZ detection.
研究领域:
分析化学
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纳米技术
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环境科学
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食品安全
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材料科学
✓ 已验证
DOI
高影响因子
Nano Research
·
2018
·Vol. 11
·期 4
·1967-1976
·
IF 7.994
Wang Xiandi,Ling Rui,Zhang Yufei,Que Miaoling,Peng Yiyao,Pan Caofeng
Mechanoluminescent materials that convert mechanical stimuli to light emission have attracted extensive attention for potential applications in human-machine interactions. Here, we report a simple and available novel approach for the oxygen-assisted preparation of ZnS:Mn particles by solid-state reaction at atmospheric pressure without the formation of the corresponding oxides. The existence of O 2 has a positive impact on the formation of S vacancies in wurtzite-phase ZnS, leading to the introduction of Mn 2+ ion luminescent centers and shallow donor levels, which can improve the electron-hole recombination rate. The O 2 ratio and Mn 2+ ion doping concentration have significant effects on the luminous efficiency, which is optimal at 1%–20% and 1 at.%–2 at.% respectively. In addition, a device based on the piezo-photonic effect with excellent pressure sensitivity of 0.032 MPa −1 was fabricated, which can map the two-dimensional pressure distribution ranging from 2.2 to 40.6 MPa in situ . This device can be applied to real-time pressure mapping, smart sensor networks, high-level security systems, human-machine interfaces, and artificial skins.
研究领域:
材料科学
·
光电子学
·
传感器技术
·
人机交互
·
智能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Ronghua Ma,Xiaoyan Wei,Chunfeng Wang,Shaohui Mao,Bing Chen,Yonghong Shao,Yu Fu,Keyu Yan,Dengfeng Peng
Mechanoluminescenece (ML) is a dynamic luminescence phenomenon of materials under various mechanical stimulation. Impurity doped ZnS shows high ML repeatability without any needs for extra excitation sources, thus making it very promising in applications like stress sensing and battery-free new light source . Lots of progress has been made in the last decades, however, the reproducible ML (RML) mechanism is still unclear to explain some basic phenomena like how the electron is excited to conduction band when undergoing mechanical actions or how the excitation energy is transferred to the dopants so efficiently. Based on comparative study of photoluminescence (PL) and ML in Mn 2+ doped ZnS prepared via melt-salt method, the RML energy routes in sphalerite ZnS: Mn 2+ is proposed herein, and further, a general mechanism is supposed which could apply to other RML systems. The excitation of RML is possibly generated by electron transfer during bond rebuilding in plastic deformation while the highly efficient energy transfer is realized through hole and electron capture by the dopant. According to this mechanism, we provide some prospects for further optimization of RML performance as well as discovery of new RML materials.
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
RSC Advances
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2016
·Vol. 6
·期 59
·54615-54622
·
IF 3.289
Tao Li,Zhikun Gao,Ningwei Wang,Zhiping Zhou,Wanzhen Xu,Jianfeng Zheng,Wenming Yang
In this study, molecularly imprinted polymers with Mn-doped ZnS quantum dots (ZnS:Mn QDs) were prepared using dibutyl phthalate (DBP) as the template molecule, 3-aminopropyltriethoxysilane (APTES) as the functional monomer and the tetraethoxysilane (TEOS) as the cross-linker. ZnS:Mn QDs offer a readout signal to monitor the amount of DBP bound to the imprinted matrix and to evaluate the efficiency of imprinting. The products MIPs-ZnS:Mn QDs were characterized by transmission electron microscope, Fourier transform infrared spectroscopy, X-ray diffraction and fluorescence spectroscopy. In addition, optical stability and the effect of pH on fluorescence intensity were evaluated. The obtained polymers can sensitively and selectively recognize template molecules in real samples via fluorescence intensity. The fluorescence intensity decreases linearly with increasing concentration in the range of 5.0–50 μmol L−1. It reaches a detection limit of 0.27 μmol L−1. The average recovery rate of DBP at three spiking levels is more than 98.1%.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Polymer-Plastics Technology and Materials
·
2024
·
IF 2.6
Zhenkun Chen,Tian Feng,Xiaomin Cheng
A novel multifunctional silica magnetic molecularly imprinted polymer (MQDs-MIPs) nanoparticle probe was synthesized for the rapid detection of triflumuron (TFM). The fluorescence probe consists of magnetite (Fe3O4) as a core and is wrapped with a molecularly imprinted polymer doped with Mn-doped ZnS quantum dots (QDs). Under optimal detection condition, the fluorescence quenching efficiency of MIP@Fe3O4@ZnS:Mn QDs displayed a linear relationship over the concentration range of 0–27.88 μmol/L with a correlation coefficient of 0.9947. Four structurally similar compounds were selected for selectivity testing and the nanocomposite showed good selectivity with a higher imprint factor of 2.52. This developed method has the advantages of simple preparation, fast response and low toxicity for trace TFM detection.
研究领域:
分析化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2022
·
IF 18.027
Yingying Li,Peisen Zhang,Wen Tang,Kevin J. McHugh,Stephen V. Kershaw,Mingxia Jiao,Xiaodan Huang,Sergii Kalytchuk,Collin F. Perkinson,Saisai Yue,Yuanyuan Qiao,Lichong Zhu,Lihong Jing,Mingyuan Gao,Buxing Han
Improving the effectiveness of cancer therapy will require tools that enable more specific cancer targeting and improved tumor visualization. Theranostics have the potential for improving cancer care because of their ability to serve as both diagnostics and therapeutics; however, their diagnostic potential is often limited by tissue-associated light absorption and scattering. Herein, we develop CuInSe2@ZnS:Mn quantum dots (QDs) with intrinsic multifunctionality that both enable the accurate localization of small metastases and act as potent tumor ablation agents. By leveraging the growth kinetics of a ZnS shell on a biocompatible CuInSe2 core, Mn doping, and folic acid functionalization, we produce biocompatible QDs with high near-infrared (NIR)-II fluorescence efficiency up to 31.2%, high contrast on magnetic resonance imaging (MRI), and preferential distribution in 4T1 breast cancer tumors. MRI-enabled contrast of these nanoprobes is sufficient to timely identify small metastases in the lungs, which is critically important for preventing cancer spreading and recurrence. Further, exciting tumor-resident QDs with NIR light produces both fluorescence for tumor visualization through radiative recombination pathways as well as heat and radicals through nonradiative recombination pathways that kill cancer cells and initiate an anticancer immune response, which eliminates tumor and prevents tumor regrowth in 80% of mice.
研究领域:
治疗诊断学
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癌症成像
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纳米医学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 9
·1-13
·
IF 5.705
Wang Jiangru,Yu Jialuo,Wang Xiaoyan,Wang Liyan,Li Bowei,Shen Dazhong,Kang Qi,Chen Lingxin
Manganese-doped ZnS quantum dots (ZnS:Mn(II) QDs) were synthesized and modified with L-cysteine (L-Cys) and 6-mercaptonicotinic acid (MNA). This prevents the aggregation of the QDs and makes them available for the interaction with Cu(II) ions via Cu(II)-S interaction. As a result, the fluorescence of the QDs is quenched by Cu(II) due to an electron transfer mechanism. The QDs display two emission peaks under 325 nm excitation, one (being red) peaking at 593 nm, the other (blue) at 412 nm. The red fluorescence is strongly quenched, while the blue fluorescence is not affected. An easily distinguishable color change from orange red to purple can be observed in fluorescence as the concentration of Cu(II) is increased. The probe is selective over commonly encountered other ions. The ratio of fluorescence intensities at 593 and 412 nm increases linearly in the 5 to 500 nM Cu(II) concentration range, and the detection limit is 1.2 nM.
Schematic of the preparation of manganese-doped quantum dots functionalized with L-cysteine and 6-mercaptonicotinic acid for selective and sensitive visual detection of copper ions.
研究领域:
分析化学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
ACS Biomaterials Science & Engineering
·
2025
·
IF 5.5
Naiyu Shi,Yanzhu Guo,Wenjuan Liu,Qian Chen,Jiangchuan Yang,Xiajie Hu,A. Yijia Mila Mohetaer,Bin Liu,Fuxiang Song
Although glass ionomer cement (GIC) is frequently adopted as the filling material for decayed teeth, it shows disadvantages like poor mechanical property and a low concentration on fluoride release, in which its clinical applications are limited. In this article, fluorinated graphene (FG) and ZnS:Mn2+ mechanoluminescence were dexterously adopted to GIC, thus successfully constructing the ternary composite glass ionomer cement material with high-strength anticaries to treat dental caries via filling. SEM, XRS, XRD, and FTIR were adopted to characterize the structural morphology and chemical composition of GFZ, comprehensively evaluating its mechanical properties, antibacterial features, and biocompatibility. Based on the experiment, the glass ionomer cement composite material (GF0.5Z1) mixed with 0.5 wt % FG and 1.0 wt % ZnS:Mn2+ presented the most significant improvement in the mechanical performance, in which the Vicker hardness, compressive strength, elastic modulus, and bending strength increased by 84.17% (89.28 ± 2.93 vs 48.46 ± 2.91 Hv), 70.90% (148.86 ± 7.50 vs 87.10 ± 0.95 MPa), 87.05% (4670.77 ± 592.42 vs 2497.07 ± 581.20 MPa), and 157.18% (26.67 ± 0.85 vs 10.37 ± 0.65 MPa), respectively, while the friction coefficient decreased by 15.38% (0.11). Moreover, based on the fluoride-releasing experiment, GF0.5Z1 released a higher concentration of fluoride (238.88 vs 69.69 ppm at the 7th day, 304.85 vs 74.79 ppm at the 14th day) than GIC at the same time node. Meanwhile, compared to GIC, GF0.5Z1 also showed advantageous antibacterial effects (90.24% ± 1.76, 94.35% ± 2.05), preferable cytocompatibility, and long-term stability. After the tooth filling in vitro, the occlusal high point can be displayed by orange visible light. Therefore, combining its outstanding mechanical properties, high fluoride ion-releasing level, enhanced antibacterial effect, and advantageous biocompatibility, GF0.5Z1 is a potential material for caries filling.
研究领域:
口腔材料学
·
纳米技术
·
生物材料
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）