The Journal of Physical Chemistry C最新文献

{"title":"Vapor Deposition of Hybrid Halide Perovskites in Ultra-High Vacuum: Challenges Revealed by Probing the Organization Dynamics in Real Time","authors":"Abdel R. Allouche*,&nbsp;, ,&nbsp;Christian P. Sonny Tsotezem,&nbsp;, ,&nbsp;Arindam Mukherjee,&nbsp;, ,&nbsp;Elena M. Staicu Casagrande,&nbsp;, ,&nbsp;Anouchah Momeni,&nbsp;, ,&nbsp;Aimeric Ouvrard,&nbsp;, ,&nbsp;Yimin Guan,&nbsp;, ,&nbsp;Laurent Guillemot,&nbsp;, ,&nbsp;Daniela Torres-Díaz,&nbsp;, ,&nbsp;Lionel Amiaud,&nbsp;, ,&nbsp;Anne Lafosse,&nbsp;, ,&nbsp;Adnan Naja,&nbsp;, ,&nbsp;Gaëlle Trippé-Allard,&nbsp;, ,&nbsp;Emmanuelle Deleporte,&nbsp;, and ,&nbsp;Hocine Khemliche*,&nbsp;","doi":"10.1021/acs.jpcc.5c04748","DOIUrl":"10.1021/acs.jpcc.5c04748","url":null,"abstract":"<p >With record efficiencies and reduced costs, hybrid halide perovskite solar cells could revolutionize photovoltaics, provided that the crippling instability problem is resolved. To reveal the relationship between structural defects and instability, vacuum deposition emerges as a promising alternative to the prevalent solution method. In addition to responding to the major upscaling issue, the vacuum approach offers greater control over the film growth. Vacuum evaporation could also help elucidate the puzzle regarding the link between morphology and optoelectronic properties. Paradoxically, layers prepared in solution, polycrystalline by nature and containing numerous defects, have so far achieved better performances than layers prepared in a vacuum, although the latter show better crystalline quality. Here, we describe an original approach, setting the conditions for the best possible control of layer growth. Deposition is performed in ultrahigh vacuum (UHV) and the growth dynamics characterized in real-time by grazing incidence fast atom diffraction. Applied to the prototypical system CH₃NH₃PbI₃, we demonstrate that chemical reaction between the coevaporated precursors, CH₃NH₃I and PbI₂, cannot take place at room temperature. In sequential mode, pure PbI₂ layers of high crystalline quality cannot be converted to CH₃NH₃PbI₃ by subsequent evaporation of CH₃NH₃I. These findings raise fundamental questions regarding the role of contaminants from the residual gas when CH₃NH₃PbI₃ layers are deposited in high vacuum conditions with unbaked vessels. These results, therefore, also question recent molecular dynamics models describing the reaction steps between PbI₂ layers and CH₃NH₃I molecules that intercalate in the van der Waals space of the inorganic network.</p>","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"129 41","pages":"18737–18748"},"PeriodicalIF":3.2,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145209827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rational Design of a Novel ETL/OFF Intergrowth Zeolite Using Renewable Silica Resources for Catalytic Cracking of n-Hexane","authors":"Krissanapat Yomthong,&nbsp;, ,&nbsp;Ploychanok Iadrat,&nbsp;, ,&nbsp;Narasiri Maineawklang,&nbsp;, ,&nbsp;Anittha Prasertsab,&nbsp;, ,&nbsp;Thassanant Atithep,&nbsp;, ,&nbsp;Somlak Ittisanronachai,&nbsp;, ,&nbsp;Tetsuo Oikawa,&nbsp;, ,&nbsp;Hiroyasu Sato,&nbsp;, ,&nbsp;Masataka Maeyama,&nbsp;, and ,&nbsp;Chularat Wattanakit*,&nbsp;","doi":"10.1021/acs.jpcc.5c03779","DOIUrl":"10.1021/acs.jpcc.5c03779","url":null,"abstract":"<p >The rational design of a modern zeolite plays a pivotal role in heterogeneous catalysis, in particular, the elaboration of an intergrowth zeolite. In this context, we report the synthesis of a novel ETL/OFF intergrowth zeolite using renewable nanosilica as a starting material. The crystallization profiles show that the formation of the intergrowth zeolite requires a short induction period of less than 48 h. Subsequently, the crystalline phase is developed, eventually forming the ETL/OFF intergrowth structure with a relative crystallinity of 86% and 14% for ETL and OFF-type zeolites, respectively, at a crystallization time of 168 h. In addition, the phase identification of the designer intergrowth zeolite was investigated via single-crystal electron diffraction (SCED) and high-resolution transmission electron microscopy (HRTEM) techniques. The refined structure derived from the SCED measurement exhibited remarkable alignment with the ETL and OFF zeolite databases, confirming the formation of both ETL and OFF frameworks within the intergrowth structure. Furthermore, to validate the precise intergrowth location, we employed fast Fourier transform (FFT) and inverse FFT (iFFT) analyses of the HRTEM images. Our findings revealed that the intergrowth region between the ETL and OFF phases was localized within the innermost regions of the crystals. Conversely, the outermost regions exhibited only the lattice fringe of the ETL framework. Interestingly, the ETL/OFF intergrowth zeolite also illustrated higher product selectivity of light olefins (C2–C3 products) in the catalytic cracking of <i>n</i>-hexane compared to the isolated ETL zeolite at <i>n</i>-hexane conversion in the range of 40–50%. This first example opens up perspectives of the development of the ETL/OFF intergrowth zeolite using renewable silica resources.</p>","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"129 41","pages":"18480–18495"},"PeriodicalIF":3.2,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145209856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimating Spatial Resolution and X-ray Radiation Dose in a Comparative Study of Composite Organic Nanoparticles Using Soft X-ray Scanning Transmission X-ray Microscopy and Soft X-ray Ptychography","authors":"Corentin Rieb,&nbsp;, ,&nbsp;Nicolas Leclerc,&nbsp;, ,&nbsp;Stéphane Méry,&nbsp;, ,&nbsp;Anne Hébraud,&nbsp;, and ,&nbsp;Sufal Swaraj*,&nbsp;","doi":"10.1021/acs.jpcc.5c04620","DOIUrl":"10.1021/acs.jpcc.5c04620","url":null,"abstract":"<p >Scanning transmission X-ray microscopy (STXM) and soft X-ray ptychography (SXP) are powerful techniques for nanoscale imaging, offering high spatial resolution with chemical sensitivity. However, the interplay between spatial resolution and X-ray radiation damage remains a critical consideration for sensitive samples, such as organic materials. In this study, we quantitatively compared spatial resolution and radiation damage between the two techniques. Spatial resolution is assessed using Fourier ring correlation (FRC), applying both the 1/2-bit threshold and a signal-to-noise ratio (SNR) threshold mathematically computed for each spatial frequency. SXP achieves superior spatial resolution due to its phase-retrieval capabilities and enhanced coherent imaging properties. In this paper, a resolution of 20–25 nm with SXP at the nitrogen K-edge (∼400 eV) was achieved for the first time, while STXM is limited by zone plate used, outermost zone width as 25 nm giving a theoretical resolution of 30.5 nm (1.22 × outermost zone width). Moreover, in our measurements, we find that the X-ray radiation dose required for SXP is approximately 6 times lower than for STXM, leading to a remarkably low damage level, highlighting its potential for damage-sensitive studies. These findings establish SXP as a highly efficient and minimally invasive imaging technique for the nanoscale characterization of organic material.</p>","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"129 41","pages":"18537–18547"},"PeriodicalIF":3.2,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145209826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal Transport and the Impact of Hydrogen Adsorption in Linde Type-A Zeolitic Imidazolate Frameworks","authors":"Hyunseok Oh,&nbsp; and ,&nbsp;Taeyong Kim*,&nbsp;","doi":"10.1021/acs.jpcc.5c05421","DOIUrl":"10.1021/acs.jpcc.5c05421","url":null,"abstract":"<p >Thermal transport in metal–organic frameworks (MOFs) is of practical interest in diverse applications such as gas storage and separations since insufficient heat dissipation can lead to detrimental effects. Despite investigations, the influence of molecular infiltration on the heat transport remains unclear in many of MOFs due to poor understanding of mechanisms governing heat conductions. Here, we report molecular dynamics investigations of thermal transport properties in zeolitic imidazolate frameworks (ZIFs). We investigated Linde Type-A topological ZIFs (ZIF-lta) exhibiting exceptionally low thermal conductivity with an unusual trend of temperature dependence deviating from many crystalline materials, despite long-range crystalline order in them. We demonstrate that heat is predominantly carried by phonons with mean free paths comparable to their wavelengths, analogous to diffusons in amorphous solids owing to strong anharmonicity caused by the complexity of unit cell consisting of a large number of metal centers. We further show that adsorbed hydrogen molecules increase the thermal conductivity of ZIFs, mainly contributed by additional vibrational modes, as a result of gas–gas or gas–framework interactions. Our work advances a fundamental understanding of the thermal transport in MOFs and suggests a means to engineer heat conduction via gas infiltrations.</p>","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"129 41","pages":"18799–18805"},"PeriodicalIF":3.2,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145209831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular Dynamics Insights into the Synergistic Polymerization of C–(A)–S–H Networks Mediated by Al–O Tetrahedra and Graphene Oxide","authors":"Shenyan Shang,&nbsp;, ,&nbsp;Weifeng Zhang*,&nbsp;, and ,&nbsp;Junfei Zhang*,&nbsp;","doi":"10.1021/acs.jpcc.5c05058","DOIUrl":"10.1021/acs.jpcc.5c05058","url":null,"abstract":"<p >This study investigates the polymerization mechanisms of calcium–(aluminum)–silicate–hydrate (C–(A)–S–H) gel using molecular dynamics (MD) simulations, with a focus on the roles of Al–O tetrahedra and graphene oxide (GO) nanosheets. Four representative gel models─C–S–H, C–A–S–H, GO/C–S–H, and GO/C–A–S–H─were constructed and simulated using the ReaxFF reactive force field. To elucidate atomic-level interactions, additional simulations of isolated Q_<i>n</i> structural units were conducted to examine the evolution of atomic stress during polymerization. Results show that both Al atoms and GO nanosheets significantly increase polymerization, though via distinct mechanisms. Al incorporation enhances the formation of Si–O–Al bonds and improves cross-linking, increasing the proportion of high-order Q₃ and Q₄ units by 177.4% compared to pure C–S–H. GO accelerates early stage polymerization and stabilizes high-Q_<i>n</i> clusters by forming interfacial GO–Ca²⁺–Si/Al layers, which also contribute to improved Ca²⁺ distribution and mobility. When both Al and GO are present, a synergistic effect emerges, yielding a more ordered and interconnected gel network. Atomic stress analysis reveals that Al primarily influences stress within Si atoms in both low- and high-Q_<i>n</i> units, while GO significantly stabilizes stress distributions in high-Q_<i>n</i> units for both Si and Al. These combined effects enhance the polymerization efficiency and structural regularity of the gel, offering insights into the design of advanced cementitious materials with improved mechanical and durability performance.</p>","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"129 41","pages":"18548–18562"},"PeriodicalIF":3.2,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145209828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Anticoking Effect of Eu3+ Doping of the Ru/Ceria Catalyst in the MSR Reaction for Hydrogen Generation","authors":"Oleksii Bezkrovnyi*,&nbsp;, ,&nbsp;Núria J. Divins,&nbsp;, ,&nbsp;Isabel Serrano,&nbsp;, ,&nbsp;Xènia Garcia,&nbsp;, ,&nbsp;Piotr Kraszkiewicz,&nbsp;, ,&nbsp;Maciej Ptak,&nbsp;, ,&nbsp;Mirosława Pawlyta,&nbsp;, ,&nbsp;Leszek Kępiński,&nbsp;, and ,&nbsp;Jordi Llorca,&nbsp;","doi":"10.1021/acs.jpcc.5c05324","DOIUrl":"10.1021/acs.jpcc.5c05324","url":null,"abstract":"<p >The positive effect of Eu³⁺ doping on the stability of the Ru/ceria catalyst during the methane steam reforming (MSR) reaction, which was used for H₂ production, was observed. The effect is attributed to a significant inhibition of coking-induced deactivation of the catalyst by Eu doping, which we explain by three hypotheses. The first one is an increase in basicity with Eu doping, which inhibits carbon deposition on the working catalyst during the MSR reaction. The second one is that Eu addition introduces strain into the ceria lattice, which could facilitate oxygen diffusion and, as a consequence, prevents catalyst’s coking. The third one is related to the presence of an additional high-temperature pathway for supplying lattice oxygen based on Eu³⁺ → Eu²⁺ reduction on the surface of the Eu-doped ceria support.</p>","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"129 41","pages":"18513–18518"},"PeriodicalIF":3.2,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.jpcc.5c05324","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145209829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tailoring the Hydrogen Diffusion in Polycrystalline WO3 Thin Films by a p–n Heterojunction","authors":"Tim K. Hecker*,&nbsp;, ,&nbsp;Jan L. Dornseifer,&nbsp;, ,&nbsp;Markus S. Friedrich,&nbsp;, ,&nbsp;Martin Becker,&nbsp;, and ,&nbsp;Peter J. Klar,&nbsp;","doi":"10.1021/acs.jpcc.5c04166","DOIUrl":"10.1021/acs.jpcc.5c04166","url":null,"abstract":"<p >This study examines the lateral diffusion of hydrogen in tungsten trioxide (WO₃) thin films with a nickel oxide (NiO) top layer. It focuses on the impact of the depletion region formed at the NiO/WO₃ p–n heterojunction on the diffusion process. This depletion region influences diffusion by acting as a barrier to hydrogen movement. It effectively reduces the thickness in WO₃ available for diffusion and increases the diffusion velocity due to the interplay with the concentration-dependent diffusion coefficient in polycrystalline WO₃. Our in situ measurement technique allows for the detailed study of lateral hydrogen diffusion by inducing a concentration gradient in the layer plane. This method demonstrates by a direct comparison that diffusion is faster in the WO₃/NiO layer structure compared to the pristine WO₃ structure. This research demonstrates the technological potential of manipulating and tuning diffusion processes in electrochromic materials by incorporating them in layered structures and paves the way for more advanced applications.</p>","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"129 41","pages":"18676–18684"},"PeriodicalIF":3.2,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.jpcc.5c04166","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Toward Regiochemical Control of Ligands on Thiol-Protected Gold Clusters","authors":"Addison K. Bralick,&nbsp;, ,&nbsp;MaKayla M. Walker,&nbsp;, ,&nbsp;Ian D. Anderson,&nbsp;, ,&nbsp;Marcus A. Tofanelli,&nbsp;, and ,&nbsp;Christopher J. Ackerson*,&nbsp;","doi":"10.1021/acs.jpcc.5c05799","DOIUrl":"10.1021/acs.jpcc.5c05799","url":null,"abstract":"<p >Thiolate-protected gold clusters attract interest due to their straightforward synthesis, facile handling, and ability to be easily functionalized via ligand exchange mechanisms. Because of their well-defined structure and low symmetry, a “grand challenge” is controlling the regioselectivity of ligand exchange. Such control enables placement of specific ligands at specific symmetry-unique sites on gold clusters. Early reports suggested that solvent exposure of the gold atoms could predict their reactivity toward ligand exchange; however, subsequent observations show that such ligands do not remain in place and are of short lifetimes. In this perspective, we discuss the complex nature of ligand exchange, which proceeds with multiple kinetic environments on gold clusters with many ligand symmetry environments. We highlight recent observations of inter- and intracluster ligand exchange that appear responsible for the short lifetimes of initial ligand exchange products. We discuss possible avenues for limiting inter- and intracluster ligand exchange, allowing regiochemical specificity to be retained. We postulate a set of 6 rules that appear to govern regiochemical control of ligand locations on gold clusters.</p>","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"129 41","pages":"18380–18390"},"PeriodicalIF":3.2,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nature of the Lithium Amide–Imide Catalyst System under Ammonia Decomposition Conditions","authors":"Thomas J. Wood*,&nbsp; and ,&nbsp;Eleanor G. Frew,&nbsp;","doi":"10.1021/acs.jpcc.5c04123","DOIUrl":"10.1021/acs.jpcc.5c04123","url":null,"abstract":"<p >The varying stoichiometry of the lithium amide–imide ammonia decomposition catalyst under working conditions was ascertained by calculating the gas release events in the ammonia decomposition experiments. Rather than varying smoothly between amide and imide, the gas releases showed evidence of a molten state with a majority of amide stoichiometry before converting at temperatures above 460 °C to a solid with a majority of imide stoichiometry. At higher temperatures, there was indirect evidence of nitride hydride groups being formed within the catalyst structure.</p>","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"129 41","pages":"18427–18432"},"PeriodicalIF":3.2,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.jpcc.5c04123","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Understanding Structure-Composition-Property Relationships of Ni-P Bulk Metallic Glasses","authors":"Md Sharif Khan, Nongnuch Artrith, Oliviero Andreussi","doi":"10.1021/acs.jpcc.5c04083","DOIUrl":"https://doi.org/10.1021/acs.jpcc.5c04083","url":null,"abstract":"Bulk metallic glasses (BMGs) are a unique class of materials characterized by their disordered atomic structure, which imparts exceptional mechanical strength, corrosion resistance, and catalytic activity. Yet, optimizing the composition of BMGs for desired properties typically relies on empirical trial-and-error, at most guided by qualitative computational models. Here, we combined machine learning with electronic-structure theory to quantitatively map the structure-composition-property relationships of Ni–P-based BMGs. Our simulations using a neural-network-based machine learning interatomic potential predict that the glass transition temperature of the BMG decreases with the phosphorus content, in quantitative agreement with experimental observations. We find that this trend is correlated with medium-range order in the material that emerges when the phosphorus content is sufficiently high. On the atomic scale, we find P-centered cluster motifs that vary in structure with the composition and temperature and impact the atomic mobility in the Ni–P BMG. This atomic-scale insight explains the composition-dependent stability of the Ni–P BMG and demonstrates how machine-learning interatomic potentials can guide the design and optimization of glassy/amorphous materials such as BMGs.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"5 1","pages":""},"PeriodicalIF":4.126,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}