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Xiang L, Liu X, Li K, Yang C, Zhao X, Gao W. Microwave-assisted controllable synthesis of 2D and 1D Eu3+-Y2O3 micro/nanoparticles and their photoluminescence properties. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Zhao X, Hai Q, Shi M, Chen H, Li Y, Qi Y. An Improved Smart Meta-Superconductor MgB2. NANOMATERIALS 2022; 12:nano12152590. [PMID: 35957019 PMCID: PMC9370472 DOI: 10.3390/nano12152590] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 07/25/2022] [Accepted: 07/26/2022] [Indexed: 02/04/2023]
Abstract
Increasing and improving the critical transition temperature (TC), current density (JC) and the Meissner effect (HC) of conventional superconductors are the most important problems in superconductivity research, but progress has been slow for many years. In this study, by introducing the p-n junction nanostructured electroluminescent inhomogeneous phase with a red wavelength to realize energy injection, we found the improved property of smart meta-superconductors MgB2, the critical transition temperature TC increases by 0.8 K, the current density JC increases by 37%, and the diamagnetism of the Meissner effect HC also significantly improved, compared with pure MgB2. Compared with the previous yttrium oxide inhomogeneous phase, the p-n junction has a higher luminescence intensity, a longer stable life and simpler external field requirements. The coupling between superconducting electrons and surface plasmon polaritons may be explained by this phenomenon. The realization of smart meta-superconductor by the electroluminescent inhomogeneous phase provides a new way to improve the performance of superconductors.
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Chen H, Li Y, Qi Y, Wang M, Zou H, Zhao X. Critical Current Density and Meissner Effect of Smart Meta-Superconductor MgB 2 and Bi(Pb)SrCaCuO. MATERIALS 2022; 15:ma15030972. [PMID: 35160918 PMCID: PMC8840483 DOI: 10.3390/ma15030972] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 01/23/2022] [Accepted: 01/25/2022] [Indexed: 12/04/2022]
Abstract
The smart meta-superconductor MgB2 and Bi(Pb)SrCaCuO increase the superconducting transition temperature (TC), but the changes in the transport critical current density (JC) and Meissner effect are still unknown. Here, we investigated the JC and Meissner effect of smart meta-superconductor MgB2 and Bi(Pb)SrCaCuO. The use of the standard four-probe method shows that Y2O3:Eu3+ and Y2O3:Eu3++Ag inhomogeneous phase significantly increase the JC, and JC decreases to a minimum value at a higher temperature. The Meissner effect was measured by direct current magnetization. The doping of Y2O3:Eu3+ and Y2O3:Eu3++Ag luminescent inhomogeneous phase causes a Meissner effect of MgB2 and Bi(Pb)SrCaCuO at a higher temperature, while the non-luminescent dopant reduces the temperature at which samples have Meissner effect. The introduction of luminescent inhomogeneous phase in conventional MgB2 and copper oxide high-temperature Bi(Pb)SrCaCuO superconductor increases the TC and JC, and Meissner effect is exerted at higher temperature. Therefore, smart meta-superconductivity is suitable for conventional and copper oxide high-temperature superconductors.
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Affiliation(s)
- Honggang Chen
- Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710129, China
| | - Yongbo Li
- Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710129, China
| | - Yao Qi
- Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710129, China
| | - Mingzhong Wang
- Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710129, China
| | - Hongyan Zou
- Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710129, China
| | - Xiaopeng Zhao
- Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710129, China
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Dwivedi A, Srivastava M, Srivastava A, Srivastava SK. Synthesis of high luminescent Eu 3+ doped nanoparticle and its application as highly sensitive and selective detection of Fe 3+ in real water and human blood serum. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 260:119942. [PMID: 34015746 DOI: 10.1016/j.saa.2021.119942] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 04/30/2021] [Accepted: 05/06/2021] [Indexed: 06/12/2023]
Abstract
The present work reports a highly efficient Ca doped Eu: Y2O3 i.e Ca0.05Eu0.01Y1.94O3 (CEY.) nanophosphor material synthesized through a facile combustion method, as a simple and selective turn-off fluorescence probe for the quantitative analysis of iron ions (Fe3+). The proposed sensor allows the quantification of iron in the range of 10 µM-90 µM with a limit of detection (LOD) ∼ 63.2 nM under the natural pH range. Moreover, CEY nanophosphor shows an excellent fluorescence phenomenon with a gradual increase in the Fe3+ ion concentration. It has been observed that the corresponding PL intensity gets completely quenched with 500 µM Fe3+ ion concentration. Furthermore, the applicability of the sensor as an efficient probe has been investigated with real water samples, iron tablets, and human blood serum (HBS). The selectivity of the probe has also been analyzed with various metal ions and biomolecules. Thus, in turn, the as-obtained sensing probe illustrates an excellent accuracy, sensitivity, and selectivity, and offers potential application in clinical diagnosis, biological and real water sample studies, with the detection of Fe3+ ion. Furthermore, it does not require any acidic medium for a level-free, and non-enzymic detection of a real sample with almost not affecting the sample quality and henceforth provides more reliable results.
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Affiliation(s)
- Arpita Dwivedi
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Monika Srivastava
- School of Materials Science and Technology, IIT (BHU), Varanasi 221005, India
| | - Amit Srivastava
- Department of Physics TDPG College, VBS Purvanchal University, Jaunpur 222001, India
| | - S K Srivastava
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi 221005, India.
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Reinforcing Increase of ΔTc in MgB 2 Smart Meta-Superconductors by Adjusting the Concentration of Inhomogeneous Phases. MATERIALS 2021; 14:ma14113066. [PMID: 34199745 PMCID: PMC8200031 DOI: 10.3390/ma14113066] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 05/26/2021] [Accepted: 06/02/2021] [Indexed: 11/25/2022]
Abstract
Incorporating with inhomogeneous phases with high electroluminescence (EL) intensity to prepare smart meta-superconductors (SMSCs) is an effective method for increasing the superconducting transition temperature (Tc) and has been confirmed in both MgB2 and Bi(Pb)SrCaCuO systems. However, the increase of ΔTc (ΔTc = Tc ‒ Tcpure) has been quite small because of the low optimal concentrations of inhomogeneous phases. In this work, three kinds of MgB2 raw materials, namely, aMgB2, bMgB2, and cMgB2, were prepared with particle sizes decreasing in order. Inhomogeneous phases, Y2O3:Eu3+ and Y2O3:Eu3+/Ag, were also prepared and doped into MgB2 to study the influence of doping concentration on the ΔTc of MgB2 with different particle sizes. Results show that reducing the MgB2 particle size increases the optimal doping concentration of inhomogeneous phases, thereby increasing ΔTc. The optimal doping concentrations for aMgB2, bMgB2, and cMgB2 are 0.5%, 0.8%, and 1.2%, respectively. The corresponding ΔTc values are 0.4, 0.9, and 1.2 K, respectively. This work open a new approach to reinforcing increase of ΔTc in MgB2 SMSCs.
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Relationship between the TC of Smart Meta-Superconductor Bi(Pb)SrCaCuO and Inhomogeneous Phase Content. NANOMATERIALS 2021; 11:nano11051061. [PMID: 33919085 PMCID: PMC8143111 DOI: 10.3390/nano11051061] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/19/2021] [Accepted: 04/20/2021] [Indexed: 12/04/2022]
Abstract
A smart meta-superconductor Bi(Pb)SrCaCuO (B(P)SCCO) may increase the critical transition temperature (TC) of B(P)SCCO by electroluminescence (EL) energy injection of inhomogeneous phases. However, the increase amplitude ΔTC (ΔTC=TC−TC,pure) of TC is relatively small. In this study, a smart meta-superconductor B(P)SCCO with different matrix sizes was designed. Three kinds of raw materials with different particle sizes were used, and different series of Y2O3:Sm3+, Y2O3, Y2O3:Eu3+, and Y2O3:Eu3++Ag-doped samples and pure B(P)SCCO were prepared. Results indicated that the TC of the Y2O3 or Y2O3:Sm3+ non-luminescent dopant doping sample is lower than that of pure B(P)SCCO. However, the TC of the Y2O3:Eu3++Ag or Y2O3:Eu3+ luminescent inhomogeneous phase doping sample is higher than that of pure B(P)SCCO. With the decrease of the raw material particle size from 30 to 5 μm, the particle size of the B(P)SCCO superconducting matrix in the prepared samples decreases, and the doping content of the Y2O3:Eu3++Ag or Y2O3:Eu3+ increases from 0.2% to 0.4%. Meanwhile, the increase of the inhomogeneous phase content enhances the ΔTC. When the particle size of raw material is 5 μm, the doping concentration of the luminescent inhomogeneous phase can be increased to 0.4%. At this time, the zero-resistance temperature and onset transition temperature of the Y2O3:Eu3++Ag doped sample are 4 and 6.3 K higher than those of pure B(P)SCCO, respectively.
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Wang C, Li Y, Chen S, Li Y, Lv Q, Shao B, Zhu G, Zhao L. A novel high efficiency and ultra-stable red emitting europium doped pyrophosphate phosphor for multifunctional applications. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00528f] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The RBPO:Eu3+ phosphor developed by the nonlinear optical material-inspired methodology can serve as a potential candidate in solid state lighting applications, artistic appreciation or some applications under extreme conditions.
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Affiliation(s)
- Chuang Wang
- College of Chemistry and Materials Engineering, Bohai University, Jinzhou, 121000, P. R. China
| | - Ying Li
- College of Chemistry and Materials Engineering, Bohai University, Jinzhou, 121000, P. R. China
| | - Shuanglong Chen
- College of Chemistry and Materials Engineering, Bohai University, Jinzhou, 121000, P. R. China
| | - Yanyan Li
- Collaborative Innovation Center of Rare-Earth Optical Functional Materials and Devices Development, School of Physics and Opto-Electronic Technology, Baoji University of Arts and Sciences, Baoji, 721016, P. R. China
| | - Qingyi Lv
- College of Chemistry and Materials Engineering, Bohai University, Jinzhou, 121000, P. R. China
| | - Bohuai Shao
- College of Chemistry and Materials Engineering, Bohai University, Jinzhou, 121000, P. R. China
| | - Ge Zhu
- College of Chemistry and Materials Engineering, Bohai University, Jinzhou, 121000, P. R. China
- Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, College of Physics and Materials Engineering, Dalian Minzu University, 18 Liaohe West Road, Dalian, 116600, P. R. China
| | - Lei Zhao
- Collaborative Innovation Center of Rare-Earth Optical Functional Materials and Devices Development, School of Physics and Opto-Electronic Technology, Baoji University of Arts and Sciences, Baoji, 721016, P. R. China
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Li X, Li C, Gao L, Zhu H, Wang L, Chen J, Li Y, Zheng J. Y 2O 3: Eu 3+/PMMA hybrid film as a converter for enhanced harvesting of broadband solar-blind UV light. APPLIED OPTICS 2020; 59:8205-8210. [PMID: 32976402 DOI: 10.1364/ao.400961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 08/13/2020] [Indexed: 06/11/2023]
Abstract
At present, the most common materials for solar-blind UV light detectors are wide band-gap semiconductors, which generally have high requirements and complex methods for preparation. Ordinary semiconductor materials such as silicon, TiO2, and Cu2O were industrialized, but they were excluded for direct harvest of solar-blind UV light due to their inability to absorb solar-blind light photons. Here, inorganic-organic hybrid film of Y2O3:Eu3+/PMMA was used as a spectral converter to realize the detection of broadband solar-blind UV light by ordinary semiconductor, converting broadband solar-blind UV luminescence to visible luminescence based on down-conversion process, after which the visible luminescence was detected by the Si photo-resister. The results show that hybrid film based on rare earth luminescence materials is particularly valuable for broadband solar-blind UV detection.
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Zhao B, Mattelaer F, Rampelberg G, Dendooven J, Detavernier C. Thermal and Plasma-Enhanced Atomic Layer Deposition of Yttrium Oxide Films and the Properties of Water Wettability. ACS APPLIED MATERIALS & INTERFACES 2020; 12:3179-3187. [PMID: 31860795 DOI: 10.1021/acsami.9b18412] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The atomic layer deposition (ALD) of yttrium oxide (Y2O3) is investigated using the liquid precursor Y(EtCp)2(iPr-amd) as the yttrium source with thermal (H2O) and plasma-enhanced (H2O plasma and O2 plasma) processes, respectively. Saturation is confirmed for the growth of the Y2O3 films with each investigated reactant with a similar ALD window from 150 to 300 °C, albeit with a different growth rate. All of the as-deposited Y2O3 films are pure and smooth and have a polycrystalline cubic structure. The as-deposited Y2O3 films are hydrophobic with water contact angles >90°. The water contact angle gradually increased and the surface free energy gradually decreased as the film thickness increased, reaching a saturated value at a Y2O3 film thickness of ∼20 nm. The hydrophobicity was retained during post-ALD annealed at 500 °C in static air for 2 h. Exposure to polar and nonpolar solvents influences the Y2O3 water contact angle. The reported ALD process for Y2O3 films may find potential applications in the field of hydrophobic coatings.
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Affiliation(s)
- Bo Zhao
- Department of Solid State Sciences , Ghent University , Krijgslaan 281 S12 , 9000 Ghent , Belgium
| | - Felix Mattelaer
- Department of Solid State Sciences , Ghent University , Krijgslaan 281 S12 , 9000 Ghent , Belgium
| | - Geert Rampelberg
- Department of Solid State Sciences , Ghent University , Krijgslaan 281 S12 , 9000 Ghent , Belgium
| | - Jolien Dendooven
- Department of Solid State Sciences , Ghent University , Krijgslaan 281 S12 , 9000 Ghent , Belgium
| | - Christophe Detavernier
- Department of Solid State Sciences , Ghent University , Krijgslaan 281 S12 , 9000 Ghent , Belgium
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Li Y, Chen H, Wang M, Xu L, Zhao X. Smart meta-superconductor MgB 2 constructed by the dopant phase of luminescent nanocomposite. Sci Rep 2019; 9:14194. [PMID: 31578457 PMCID: PMC6775325 DOI: 10.1038/s41598-019-50663-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 09/17/2019] [Indexed: 11/17/2022] Open
Abstract
On the basis of the idea that the injecting energy will improve the conditions for the formation of Cooper pairs, a smart meta-superconductor (SMSC) was prepared by doping luminescent nanocomposite Y2O3:Eu3+/Ag in MgB2. To improve the superconducting transition temperature (TC) of the MgB2-based superconductor, two types of Y2O3:Eu3+/Ag, which has the strong luminescence characteristic, with different sizes were prepared and marked as m-Y2O3:Eu3+/Ag and n-Y2O3:Eu3+/Ag. MgB2 SMSC was prepared through an ex situ process. Results show that when the dopant content was fixed at 2.0 wt.%, the TC of MgB2 SMSC increased initially then decreased with the increase in the Ag content in the dopant. When the Ag content is 5%, the TC of MgB2 SMSC was 37.2–38.0 K, which was similar to that of pure MgB2. Meanwhile, the TC of MgB2 SMSC doped with n-Y2O3:Eu3+/Ag increased initially then decreased basically with the increase in the content of n-Y2O3:Eu3+/Ag, in which the Ag content is fixed at 5%. The TC of MgB2 SMSC doped with 0.5 wt.% n-Y2O3:Eu3+/Ag was 37.6–38.4 K, which was 0.4 K higher than that of pure MgB2. It is thought that the doping luminescent nanocomposite into the superconductor is a new means to improve the TC of SMSC.
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Affiliation(s)
- Yongbo Li
- Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Honggang Chen
- Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Mingzhong Wang
- Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Longxuan Xu
- Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Xiaopeng Zhao
- Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi'an, 710072, China.
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