Journal of Materiomics最新文献

{"title":"Cold sintering of CsPbBr3 quantum dots embedded KBr ceramics for LED displays","authors":"Jie Gao ,&nbsp;Yu Ren ,&nbsp;Qi Ding,&nbsp;Peng Yan,&nbsp;Yongping Liu,&nbsp;Yunfeng Hu,&nbsp;Jihu Chen,&nbsp;Zhi Cheng,&nbsp;Yuchi Fan,&nbsp;Wan Jiang","doi":"10.1016/j.jmat.2024.100933","DOIUrl":"10.1016/j.jmat.2024.100933","url":null,"abstract":"<div><div>Thanks to their tunable luminescence, narrow emission range, and superior color fidelity, perovskite quantum dots (PeQDs) are widely considered as promising materials for next-generation backlight displays. However, the susceptibility to degradation and failure when exposed to ambient environment significantly hampers their widespread applications. Herein, we reported an effective strategy to encapsulate CsPbBr₃ nanocrystals into robust KBr matrix <em>via</em> cold sintering process at 120 °C. The well prepared translucent CsPbBr₃@KBr ceramic displays a narrow green photoluminescence (with a full-width at half-maximum of ∼22 nm) and an quantum yield of 73.6% with remarkable thermal stability. By incorporating red emitting K₂SiF₄:Mn⁴⁺ phosphor into the KBr matrix, the color gamut of the constructed white LED improves to 118% of the National Television System Committee (NTSC) standard, suggesting that the thermally robust and narrow-band green emitter holds significant promise for wide-color-gamut liquid crystal displays.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 4","pages":"Article 100933"},"PeriodicalIF":8.4,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unveiling the structure–activity relationships of tetracycline degradation by photocatalytic activation peroxymonosulfate of CuBi2O4 microspheres: DFT calculation and mechanism insight","authors":"Jin Wang ,&nbsp;Jiaming Li ,&nbsp;Yuan Li,&nbsp;Gaoke Zhang","doi":"10.1016/j.jmat.2024.100934","DOIUrl":"10.1016/j.jmat.2024.100934","url":null,"abstract":"<div><div>Achieving efficient photocatalytic activation of peroxymonosulfate (PMS) degradation of pollutants through the regulation strategy of surface microstructure in catalysts remains a challenge. Herein, CuBi₂O₄ nanorods (CBO NRs) and CuBi₂O₄ microspheres (CBO Ms) were synthesized by simply regulating the alkalinity of the reaction solvent. Under full–spectrum irradiation, CBO Ms exhibited remarkable photocatalytic performance, removing 92.48% of tetracycline (TC) within 12 min, with the reaction rate constant reaching 0.2135 min⁻¹, which is approximately 2.7 times that of CBO NRs (0.0798 min⁻¹). The exposure of oxygen vacancies on the surface of CBO Ms significantly promoted the generation and migration of photogenerated carriers internally, accelerated charge accumulation at the Cu active sites on the surface, and thereby enhanced the adsorption of CBO Ms on PMS. The charge density difference results confirmed the rapid transference of surface–enriched electrons to the PMS, facilitating further activation of PMS. Radical quenching experiment and EPR testing verified that both radical (SO₄^•−, •OH) and non–radical (¹O₂) pathways were involved in the reaction system. This study offers novel insights into the design of catalysts for the photocatalytic activation of PMS to efficiently degrade environmental pollutants.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 3","pages":"Article 100934"},"PeriodicalIF":8.4,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142536060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diffusosphere engineering in BNT-based multilayer heterogeneous film capacitors for high performance","authors":"Jin Qian ,&nbsp;Panpan Lv ,&nbsp;Guanglong Ge ,&nbsp;Siming Wang ,&nbsp;Jinfeng Lin ,&nbsp;Fei Yan ,&nbsp;Bo Shen ,&nbsp;Zhenxiang Cheng ,&nbsp;Jiwei Zhai","doi":"10.1016/j.jmat.2024.100931","DOIUrl":"10.1016/j.jmat.2024.100931","url":null,"abstract":"<div><div>Combining layers with high breakdown resistance and high polarization is a promising approach for designing dielectric capacitors with high energy density and efficiency. However, such combinations often accompany strong interfacial polarization, magnification of local electric fields, leading to premature breakdown. This work addresses this issue <em>via</em> controlled formation of diffusospheres. We constructed multilayer heterogeneous films using two Bi_0.5Na_0.5TiO₃ (BNT)-based substances with high breakdown resistance and high polarization properties. Experimental results and finite element simulations demonstrate that the energy storage capacity of these films effectively harnesses the advantages of both phases. Notably, the interface polarization is minimal. Instead, a solid solution-like diffusosphere, formed by the mutual diffusion of ions between the two phases, plays a crucial role. The diffusosphere acts as a transition zone, mitigating charge aggregation at the interfaces and optimizing the relaxor and breakdown characteristics of the capacitor. With six diffusospheres, the multilayer heterogeneous capacitor achieves a recoverable energy storage density of 94 J/cm³, a significant advancement in BNT-based energy storage films. This work proposes and validates the concept of diffusospheres and their role in reducing interfacial polarization in multilayer heterogeneous films, enhancing the understanding of heterogeneous composite structures and advancing the field of dielectric energy storage.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 4","pages":"Article 100931"},"PeriodicalIF":8.4,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Excellent energy-storage performance realized in SANNS-based tungsten bronze ceramics via synergistic optimization strategy","authors":"Shudong Xu ,&nbsp;Mingzhe Han ,&nbsp;Zhipeng Zhu ,&nbsp;Yuzhen Zhao ,&nbsp;Wenqi Song ,&nbsp;Xue Dong ,&nbsp;Zemin He ,&nbsp;Zongcheng Miao ,&nbsp;Lingling Wei ,&nbsp;Zupei Yang","doi":"10.1016/j.jmat.2024.100930","DOIUrl":"10.1016/j.jmat.2024.100930","url":null,"abstract":"<div><div>A series of tungsten bronze (Sr_{2–<em>x</em>}Bi_<em>x</em>Ag_0.2Na_0.8) (Nb_{4.8–<em>x</em>}Zr_<em>x</em>Sb_0.2)O₁₅ compounds were fabricated by solid-state method to systematically study the impacts of co-doping Bi³⁺/Zr⁴⁺ ions in A/B-sites on the structures, relaxor characteristics, and energy-storage performances. The relationship between structures and relaxor behaviors are summarized as three main points: (1) with increasing the amount of co-doping Bi³⁺/Zr⁴⁺ ions, the crystal structure evolved from an orthorhombic <em>Bbm</em>2 to a tetragonal paraelectric <em>P</em>4/<em>mbm</em> symmetry at room temperature; (2) enhancing relaxor characteristics at room temperature was achieved by tailoring the temperature region of <em>T</em>_m−<em>T</em>_B (<em>T</em>_m is the dielectric maximum temperature, <em>T</em>_B is the Burns temperature), which could be attributed to the incommensurate local structure modulations associated with the orthogonal distortion of <em>P</em>4<em>bm</em> symmetry and the appearance of microdomains; (3) The co-introduction of Bi³⁺ and Zr⁴⁺ could also played an important role in inhibiting the grain sizes, increasing resistivity and band-gap to enhance the breakdown strength. Finally, a superior recoverable energy-storage density (3.61 J/cm³) and an ultrahigh energy efficiency (90%) were obtained simultaneously at 389 kV/cm in BZ_0.05 ceramics. Moreover, an outstanding power density (158.98 MW/cm³) together with a current density of 1422.29 A/cm² was realized at 220 kV/cm from the charging−discharging performance measurements. The excellent energy-storage performance (ESPs) make the environmentally friendly BZ_0.05 samples show enormous potential in high-power capacitor applications.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 4","pages":"Article 100930"},"PeriodicalIF":8.4,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Machine learning assisted Q×f value prediction of ABO4-type microwave dielectric ceramics","authors":"Liangyu Mo ,&nbsp;Jincheng Qin ,&nbsp;Mingsheng Ma ,&nbsp;Zhifu Liu","doi":"10.1016/j.jmat.2024.100926","DOIUrl":"10.1016/j.jmat.2024.100926","url":null,"abstract":"<div><div>Microwave dielectric ceramics (MWDCs) with a high <em>Q</em>×<em>f</em> value can improve the performance of radio frequency components like resonators, filters, antennas and so on. However, the quantitative structure-property relationship (QSPR) for the <em>Q</em>×<em>f</em> value is complicated and unclear. In this study, machine learning methods were used to explore the QSPR and build up <em>Q</em>×<em>f</em> value prediction model based on a dataset of 164 ABO₄-type MWDCs. We employed five commonly-used algorithms for modeling, and 35 structural features having correlations with <em>Q</em>×<em>f</em> value were used as input. In order to describe structure from both global and local perspectives, three different feature construction methods were compared. The optimal model based on support vector regression with radial basis function kernel shows good performances and generalization capability. The features contained in the optimal model are primitive cell volume, molecular dielectric polarizability and electronegativity with A- and B-site mean method. The relationships between property and structure were discussed. The model used for the <em>Q</em>×<em>f</em> value prediction of tetragonal scheelite shows excellent performances (<em>R</em>² = 0.8115 and RMSE = 8362.73 GHz), but it needs auxiliary features of average bond length, theoretical density and polarizability per unit volume for monoclinic wolframite ceramics to improve model prediction ability.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 4","pages":"Article 100926"},"PeriodicalIF":8.4,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancement of thermoelectric properties of p-type bismuth telluride bulk composites with AgTiO2 nano particles via spray coating and hot deformation process","authors":"Anil Kumar ,&nbsp;Saurabh Thoravat ,&nbsp;Hong Jong Jin ,&nbsp;Junyoung Park ,&nbsp;Hyungyu Jin ,&nbsp;Pooja Rawat ,&nbsp;Jong-Soo Rhyee","doi":"10.1016/j.jmat.2024.100929","DOIUrl":"10.1016/j.jmat.2024.100929","url":null,"abstract":"<div><div>We aimed to enhance p-type Bi_0.4Sb_1.6Te_3.4 (BST) composite's thermoelectric (TE) properties by minimizing thermal conductivity through hierarchical phonon scattering <em>via</em> nano Ag-coated TiO₂ (Ag/TiO₂). Hot deformation (HD) was employed to induce multi-scale microstructures in these high-performance p-type TE materials, affecting electrical and thermal transport properties through improved textures and donor-like effects. Our optimization strategy included creating grain boundaries, multiple phonons scattering centers, and introducing high-density lattice defects, significantly reducing lattice thermal conductivity. The combined effects led to a noticeable improvement in the figure of merit (<em>zT</em>) across the temperature range, with all TE parameters measured along the in-plane direction. In the case of the hot-deformed Bi_0.4Sb_1.6Te_3.4 alloy, the maximum <em>zT</em> reached 1.31 at 350 K, while the average <em>zT</em> (<em>zT</em>_avg) was 1.17 in the range of 300–400 K, suggesting promising potential for near room temperature TE power generation and solid-state cooling.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 3","pages":"Article 100929"},"PeriodicalIF":8.4,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Layered oxyiodide CdBiO2I: An efficient visible light responsive and scalable photocatalyst","authors":"Weishan Zheng ,&nbsp;Zijian Zhu ,&nbsp;Rui Sha ,&nbsp;Shuchen Tu ,&nbsp;Hongwei Huang","doi":"10.1016/j.jmat.2024.100928","DOIUrl":"10.1016/j.jmat.2024.100928","url":null,"abstract":"<div><div>Developing high-performance visible-light driven photocatalyst (<em>λ</em> ≥ 420 nm) makes significance for the efficient utilization of solar energy. Mass production and easy recycling are equally important for the practical application of powdery photocatalyst. However, it is challenging to meet the above requirements at the same time. In this work, we develop an efficient visible-light responsive layered oxyiodide CdBiO₂I nanosheets prepared by a facile direct precipitation method at ambient atmosphere, and demonstrate its upgradable features well fitting potential application. CdBiO₂I has a layered crystal structure consisting of [CdBiO₂]⁺ layer and I⁻ single layer, differing from that of BiOI composed of [BiO₂]²⁺ layer and I⁻ double layers. It displays an absorption edge of 520 nm in visible region, with a band gap of 2.52 eV CdBiO₂I has a large intrinsic effective mass difference of hole/electron, exceeding BiOI by 8-fold, which results in much higher charge separation efficiency and production of more reactive species (superoxide radicals and holes). The degradation efficiency of CdBiO₂I nanosheets for tetracycline hydrochloride reaches 84% under the visible light irradiation within 1 h, in which the degradation rate is 10 times that of BiOI. In addition, mass production (12 g catalyst at one time) and immobilization onto porous polyurethane foam of CdBiO₂I powder are also demonstrated, which indicates the scalable properties and easy recovery of the catalyst, highlighting the advantages of the current preparation method and prefiguring its potential in practical applications. This work may enlighten future research on the exploitation of solar-driven catalyst with high efficiency and strong practical applicability.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 4","pages":"Article 100928"},"PeriodicalIF":8.4,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancement in conduction loss induced by morphology engineering for excellent electromagnetic wave absorption","authors":"Qing Chang ,&nbsp;Zijun Xie ,&nbsp;Geng Chen ,&nbsp;Zijing Li ,&nbsp;Yujin Duan ,&nbsp;Bin Shi ,&nbsp;Hongjing Wu","doi":"10.1016/j.jmat.2024.100927","DOIUrl":"10.1016/j.jmat.2024.100927","url":null,"abstract":"<div><div>Understanding the microstructure-property relationship from the microscopic and macroscopic perspectives, instead of semi-empirical rules, can facilitate the design of microcosmic morphology to adjust the impedance matching and dielectric loss of the carbon-based materials, which are still lacking so far. In this study, a clear correlation between microstructure and conduction loss was revealed in agarose-derived carbon using a facile salt-etching strategy, in which ferric nitrate acted more as a morphology modifier for bulky carbon rather than a component regulator. Specifically, with the increasing amount of ferric nitrate, the original smooth bulky carbon was etched with caves, which gradually enlarged in size and depth and thus thinned in wall, and eventually transformed into a three-dimensional (3D) interconnected cellular structure, accompanied by a gradual increase in conductivity. Benefiting from the optimal impedance matching and strong conduction loss originating from the unique 3D cellular structure of agarose-derived carbon, AF-3 exhibited super-wide and strong absorption with an effective absorption bandwidth of 7.28 GHz (10.32–17.60 GHz, 2.9 mm) and a minimum reflection loss of −46.6 dB (15.6 GHz, 2.5 mm). This study establishes the relationship between microstructure, dielectric properties, and loss mechanism in carbon-based materials and also provides a new insight into the fine modulation of EMW-absorbing properties from morphological design.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 4","pages":"Article 100927"},"PeriodicalIF":8.4,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High breakdown electric field and ultralow loss in Sb+Ho co-doped TiO2 giant dielectric ceramics induced by strongly coupled defect clusters","authors":"Jiangtao Fan ,&nbsp;Langxiang Zhong ,&nbsp;Tiantian Yang ,&nbsp;Zhanggui Hu","doi":"10.1016/j.jmat.2024.07.008","DOIUrl":"10.1016/j.jmat.2024.07.008","url":null,"abstract":"<div><div>Achieving a large dielectric constant and high breakdown electric field simultaneously has been a hot and difficult topic for co-doped TiO₂ ceramics. In this study, (Sb_0.5Ho_0.5)_<em>x</em>Ti_{1–<em>x</em>}O₂ (SHTO<em>x</em>, <em>x</em> = 0, 0.01, 0.02, 0.04 and 0.06) ceramics with strongly coupled defect clusters were prepared to improving the dielectric and breakdown properties. In particular, the SHTO0.01 ceramic exhibits CP (<em>ε</em>′ = 1.61 × 10⁴, 1 kHz), ultralow loss (tan<em>δ</em> = 0.0037, 1 kHz), excellent DC bias (0–400 V/cm) and thermal stability (Δ<em>ε</em>′/<em>ε</em>′_25 °C ≤ ±15% at 1 kHz, −145 to 215 °C). Besides, high dielectric breakdown properties (<em>E</em>_b ∼2.287 kV/cm and <em>α</em> = 7.24) was also achieved. Meanwhile, the mechanism of achieving excellent overall properties was deeply explored by XPS, UDR law, impedance spectroscopy and relaxation behavior analysis. The high dielectric and breakdown field strength performances mainly originate from the strongly coupled defective dipole clusters and the highly insulating grain boundaries as well as electrode-ceramic interfaces, which synergistically restrict the long-range movement of free electrons. This research indicates that the construction of defect clusters with strong coupling is an effective approach towards obtaining CP ceramics with ultra-low loss and high breakdown field strength performances.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 3","pages":"Article 100923"},"PeriodicalIF":8.4,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spin-coated BiFeO3 films on Si wafers: Low processing temperature but prominent piezoelectricity","authors":"Jiaojiao Yi ,&nbsp;Yining Zhai ,&nbsp;Yue-yu-shan Cheng ,&nbsp;Liang Shu ,&nbsp;Dawei Zhang ,&nbsp;Jing-Feng Li ,&nbsp;Lisha Liu","doi":"10.1016/j.jmat.2024.07.010","DOIUrl":"10.1016/j.jmat.2024.07.010","url":null,"abstract":"<div><div>The direct integration of crystalline oxide layers with industrial Si substrate, specifically compatible with CMOS technology, requires the development of relatively simple, low-temperature processing routes below 450 °C. Here, a novel nonstoichiometric approach is proposed to achieve fabrication of BiFeO₃ films at 450 °C. Of particular importance is that, a saturation and remnant polarization of ∼80 μC/cm² and ∼60 μC/cm² and a strain as large as 1% are obtained. This strain stands as one of the most impressive values reported for thin films, comparable to the most superior strain obtained in ferroelectric films fabricated at temperatures exceeding 700 °C. The current work provides a new paradigm with significant simplicity and novel efficacy in reducing processing temperatures, as well offers a promising material for memory and piezo-driven actuating applications, especially meeting the increasing demand for precision position control systems at the nanometer scale.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 3","pages":"Article 100925"},"PeriodicalIF":8.4,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}