Surface Science最新文献

{"title":"The sensing mechanism of metal (Ag, Au, Pd, Pt)-doped WSe2 monolayer for dissolved gases in transformer oil: A first-principle study","authors":"Qing An ,&nbsp;Junhua Wang ,&nbsp;Ying He ,&nbsp;Jianing Zhou ,&nbsp;Xiaolan Yang","doi":"10.1016/j.susc.2025.122891","DOIUrl":"10.1016/j.susc.2025.122891","url":null,"abstract":"<div><div>In the works, the effect of noble metal atoms (Ag, Au, Pd, Pt) as dopants on the behaviour of WSe₂ monolayer for adsorption of four key dissolved gases (C₂H₂, CH₄, CO, H₂) in transformer oil has been studied in depth using density-functional theory (DFT). It is shown that WSe₂ exhibits weak adsorption energies for C₂H₂, CH₄, CO, and H₂ molecules (below -0.02 eV). Calculations revealed that Ag, Au, Pd, and Pt doping significantly enhanced the interactions between gas molecules and the WSe₂ surface. Notably, the adsorption energy for C₂H₂ increased to -1.0 eV, with other molecules also showing marked increases, the adsorption capacity of Ag, Au, Pd, Pt- WSe₂ nanosheets for dissolved gases in transformer oils is in the order of C₂H₂ &gt; CH₄ &gt; H₂&gt; CO, Ag, Au, Pd, and Pt atoms enhance the chemical adsorption capacity of WSe₂ by acting as electron donors and undergoing charge transfer with gas molecules. By calculating recovery times, it is predicted that Ag, Au, Pd, and Pt doped WSe₂ monolayers can detect C₂H₂ gas at 398 K after brief heating (8.17 s, 1.64 s, 6.28 s, and 2.47 s, respectively). This study provides a theoretical reference of significant value for WSe₂ sensors in monitoring dissolved gases generated by internal faults in transformer oil.</div></div>","PeriodicalId":22100,"journal":{"name":"Surface Science","volume":"765 ","pages":"Article 122891"},"PeriodicalIF":1.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145569910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing the reversibility of Mg7TiH16 via interfacial engineering with TiH2: First principles study","authors":"Yuying Chen ,&nbsp;Jianfeng Wang ,&nbsp;Yuting Chen ,&nbsp;Jiaxuan Tang ,&nbsp;Ruiyang Qu","doi":"10.1016/j.susc.2025.122908","DOIUrl":"10.1016/j.susc.2025.122908","url":null,"abstract":"<div><div>The reversibility of hydrogen absorption and desorption dictates the cycling stability of hydrides. This stability is a critical benchmark for their viability as hydrogen storage media. This study employs First-principles study to unravel the stability, hydrogen desorption, and diffusion mechanisms at the TiH₂(111)/Mg₇TiH₁₆(111) interface. Our findings demonstrate that interface formation induces significant atomic rearrangement and charge redistribution, thereby affecting its stability. The dehydrogenation behavior is critically dependent on the specific atomic configuration at the interface, with hydrogen release preferentially occurring within the Mg₇TiH₁₆ side due to its lower dehydrogenation energy. Analysis of diffusion barriers and bond cleavage energies suggests a dehydrogenation mechanism initiated at the interface, where the weakening of metal-hydrogen bonds in Mg₇TiH₁₆ acts as the primary driver. These results provide a theoretical foundation for understanding the interfacial hydrogen desorption process and advocate multilayer interface engineering as a promising strategy to boost the reversible hydrogen storage performance of Mg-based hydrides.</div></div>","PeriodicalId":22100,"journal":{"name":"Surface Science","volume":"766 ","pages":"Article 122908"},"PeriodicalIF":1.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145737855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DFT insights into B3C2N3 nanosheets: A promising biosensor for the earliest stage detection of exhaled breath biomarkers in lung cancer","authors":"Aqeel Mohsin Ali ,&nbsp;Ahmed Majeed Jaseem ,&nbsp;Wisam Abdulhassan Radhi","doi":"10.1016/j.susc.2025.122914","DOIUrl":"10.1016/j.susc.2025.122914","url":null,"abstract":"<div><div>Density functional theory (DFT) was utilized to investigate the potential interactions between B₃C₂N₃ graphene-like nanosheets and three lung cancer biomarkers present in exhaled breath stage. This study focuses on sensing capability of three lung cancer biomarkers of volatile organic compounds (VOCs), namely, 2-propenal (C₃H₄O), acetone (C₃H₆O), and isoprene (C₅H₈). The selective capability of B₃C₂N₃ monolayer as an effective surface towards these biomarkers is demonstrated. The B₃C₂N₃ monolayer was theoretically confirmed to offer some sensing merits such as favorable adsorption energy, optical absorption, enhancing electrical conductivity, and preferable recovery time when conducted to the target VOCs biomarkers. To identify the adsorption mechanism between the target VOCs and the B₃C₂N₃ surface, charge transfer distribution was evaluated using Mulliken population analysis. The monolayer surface exhibited electronic and <em>φ</em>-type sensor characteristics in the detection process of all studied biomarkers. To identify the dynamic and thermal stability of the constructed systems: 2-propenal/B₃C₂N₃, acetone/B₃C₂N₃, and isoprene/B₃C₂N₃, molecular dynamics (MD) was performed after 5000 steps for 1 fs at ambient temperature. The results revealed that the B₃C₂N₃ monolayer surface may serve as a promising sensor for the earliest stage diagnosis of lung cancer depended on biomarkers detection of exhaled breath patients.</div></div>","PeriodicalId":22100,"journal":{"name":"Surface Science","volume":"766 ","pages":"Article 122914"},"PeriodicalIF":1.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145790359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial evolution of the electronic states near a defect in 1T-TaS₂","authors":"Yuto Nakashima ,&nbsp;Sora Kobayashi ,&nbsp;Atsushi Nomura ,&nbsp;Hideaki Sakata","doi":"10.1016/j.susc.2025.122888","DOIUrl":"10.1016/j.susc.2025.122888","url":null,"abstract":"<div><div>The Mott collapse is of significant interest, as it can lead to exotic behaviors such as high-temperature superconductivity, making its underlying mechanisms crucial to understand. The Mott state is realized in 1<em>T</em>-TaS₂, a member of transition metal dichalcogenides, due to in-plane interactions among Ta d-electrons. In this study, we investigated how the Mott state collapsed near an atomic defect in 1<em>T</em>-TaS₂ scanning tunneling microscopy (STM)/scanning tunneling spectroscopy (STS) measurements at 4.2 K. As the STM tip approached the atomic defect, we observed an overall shift of the dI/dV spectra towards positive bias, accompanied by the emergence of spatially localized in-gap states above the Fermi energy. In closer proximity to the defect, the gap structure at the Fermi energy transformed into a single-peak feature. This sequence of spatial evolution in the electronic structure can be interpreted as the Mott collapse in response to the amount of hole doping.</div></div>","PeriodicalId":22100,"journal":{"name":"Surface Science","volume":"765 ","pages":"Article 122888"},"PeriodicalIF":1.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145569908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanistic insights into the oxygen reduction reaction on the Fe-N4/C single-atom catalysts: Spectator species and solvent as the key driving force","authors":"Chaofang Deng ,&nbsp;Can Deng ,&nbsp;Shiwen Hu ,&nbsp;Yanrong Ren","doi":"10.1016/j.susc.2025.122875","DOIUrl":"10.1016/j.susc.2025.122875","url":null,"abstract":"<div><div>Noble-metal-free catalysts, such as metal-nitrogen-carbon (M-N-C) materials, have attracted significant attention owing to their excellent electrocatalytic activity toward the oxygen reduction reaction (ORR). Among them, FeN₄ single-atom catalysts embedded in graphene have been extensively investigated as promising ORR catalysts. However, the reaction mechanism still remains controversial, and the predicted potential deviates from experimental observations. In this work, we employed DFT calculations to elucidate the ORR mechanism taking the solvation effect into consideration. The results reveal that the central Fe atom is covered by *O_2, which acts as a modifying ligand to optimize the adsorption of reaction intermediates, yielding a theoretical limiting potential of 0.61 V. When solvation is included, the limiting potential increases to 0.78 V (implicit solvent) and 0.71 V (explicit solvent), in good agreement with experimental values. The enhanced catalytic activity originated from solvent stabilization of the adsorbed ORR intermediates via hydrogen bonding, which facilitates the overall reaction process. The solvent effect is particularly pronounced for the *OH species, whose adsorption is significantly stabilized by explicit water molecules, thereby hindering further reduction of *OH/*OH and rendering the O₂-mediated mechanism is more favorable for FeN₄ in explicit solvent surroundings. Finally, by incorporating the applied potential through a constant-potential model, the limiting potential reaches approximately 0.8 V, consistent with the experimental findings. This work demonstrates the necessity of assessing the effect of solvent and would help design better ORR electrocatalysts.</div></div>","PeriodicalId":22100,"journal":{"name":"Surface Science","volume":"765 ","pages":"Article 122875"},"PeriodicalIF":1.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145518125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surface composition of Pd/Cu(111) single-atom alloys and its impact on selective non-oxidative butanol dehydrogenation","authors":"Philipp A. Fredersdorff ,&nbsp;Jan Smyczek ,&nbsp;Carsten Schröder ,&nbsp;Paul Kohlmorgen ,&nbsp;Paul Fröhlich ,&nbsp;Patrick Hubert ,&nbsp;Stephan Appenfeller ,&nbsp;Konstantin M. Neyman ,&nbsp;Swetlana Schauermann","doi":"10.1016/j.susc.2025.122904","DOIUrl":"10.1016/j.susc.2025.122904","url":null,"abstract":"<div><div>Single atom alloys (SAAs) offer a powerful strategy to achieve high catalytic selectivity while minimizing the use of expensive noble metals. Control over their selectivity requires a fundamental-level understanding of how it depends on the electronic structure and geometric arrangement of the active single atoms embedded into the host matrix as well as how these properties are affected by the alloy composition and the preparation conditions. Here, we present a comprehensive study of Pd/Cu(111) surfaces over a wide range of Pd coverages (0.01–0.55 ML), combining infrared reflection absorption spectroscopy (IRAS) employing CO as a highly sensitive probe for different adsorption sites, scanning tunneling microscopy (STM), synchrotron-based high-resolution X-ray photoelectron spectroscopy (HR-XPS), temperature-programmed desorption (TPD), and density functional theory (DFT) calculations. Specifically, the correlation of the IRAS, STM and HR-XPS data, which were obtained as a function of changing preparation parameters (Pd loading and annealing temperature), allowed to identify three different forms of Pd: <em>(i)</em> single Pd atoms embedded into Cu, <em>(ii)</em> Pd ensembles consisting of several Pd atoms and residing on Cu surface as well as <em>(iii)</em> subsurface Pd formed as a result of Pd diffusion into Cu bulk. Immediately after deposition at 300 K, Pd nucleates preferentially at step edges of the Cu(111) crystal, forming isolated Pd atoms at coverages below 0.1 ML and larger Pd ensembles at higher Pd loadings. At coverages above 0.55 ML, 3D Pd clusters emerge near the step edges. Annealing to 550 K significantly alters this distribution: Pd diffuses to terrace sites, forming isolated atoms and leading to disintegration of Pd ensembles. Up to 0.3 ML, isolated Pd atoms dominate on terraces, while ensembles are absent. At coverages exceeding 0.3 ML, however, both IRAS and XPS reveal reformation of Pd ensembles.</div><div>The structural information was linked to the catalytic performance in butanol dehydrogenation to butanal and decomposition to CO. TPD experiments correlated with the structural information on the surface composition suggest that isolated Pd atoms embedded in the Cu(111) terrace selectively catalyze butanal formation, while Pd ensembles promote extensive C–C and C–H bond scission, yielding CO. However, when Pd atoms are located at the step edges, both pathways occur, indicating that the low-coordinated environment enables not only H abstraction but also C–C bond cleavage in butanol. DFT calculations reveal similar electronic structures for isolated Pd atoms embedded into the (111) terraces and step edges, suggesting that reactivity differences arise primarily from the geometric effects. With this, the local geometric environment of the active metal emerges as highly important factor governing selectivity in alcohol dehydrogenation.</div></div>","PeriodicalId":22100,"journal":{"name":"Surface Science","volume":"766 ","pages":"Article 122904"},"PeriodicalIF":1.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145737853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surface chemistry of monochloramine catalyzed by Fe(111)","authors":"Oloruntoba S. Agbelusi ,&nbsp;Subash Pandey ,&nbsp;Sonam ,&nbsp;Neetu Goel ,&nbsp;R.M. D. Naveen Tharaka ,&nbsp;Journey A. Lopez ,&nbsp;Kathryn A. Perrine","doi":"10.1016/j.susc.2025.122890","DOIUrl":"10.1016/j.susc.2025.122890","url":null,"abstract":"<div><div>Monochloramine (NH₂Cl) is a secondary disinfectant used for water purification and interacts with iron materials in various environments. Iron surfaces undergo reduction-oxidation and corrosion, where zero-valent iron sites are produced at complex interfaces. The initial stages of the reaction of monochloramine (NH₂Cl) have been studied on Fe(111), as a model for iron pipelines and mineral surfaces, at the gas/solid interface in ultra-high vacuum conditions. Using <em>in situ</em> infrared reflection absorption spectroscopy, NH₂Cl was found to adsorb molecularly at -160 °C, by observation of amine vibrational signatures. Auger electron spectroscopy was used to detect the presence of chloride to amine in a 3:1 ratio. Upon annealing, the NH₂Cl multilayer was found to desorb from Fe(111) at -120 °C, and the monolayer also undergoes molecular dissociation. At 34 °C, NH₂Cl primarily binds through the chloride species, thus blocking sites for NH₂ adsorption. Density functional theory computations and X-ray photoelectron spectroscopy confirmed two favorable chemisorbed orientations, both through binding of chloride. Further annealing allowed for chloride desorption before 400 °C, suggesting decomposition. The NH₂Cl is found to undergo a dechlorination mechanism, similar to chlorohydrocarbon reactions on iron surfaces. These findings reveal the mechanism of the chloramine disinfectant on metallic iron interfaces and its role in pipelines and water systems.</div></div>","PeriodicalId":22100,"journal":{"name":"Surface Science","volume":"766 ","pages":"Article 122890"},"PeriodicalIF":1.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145737854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High pressure H2 treatment for deep cleaning of Fe single crystals","authors":"Sun Myung Kim ,&nbsp;Imants Dirba ,&nbsp;Oliver Gutfleisch ,&nbsp;Wolfgang Donner ,&nbsp;Jan P. Hofmann","doi":"10.1016/j.susc.2025.122878","DOIUrl":"10.1016/j.susc.2025.122878","url":null,"abstract":"<div><div>Iron single crystals Fe(100), Fe(111) and Fe(110) were reduced with a high-pressure autoclave H₂-treatment to obtain clean surfaces. By increasing the pressure, the reduction was finished after 3 hours with temperature <em>T</em> = 600°C and pressure <em>P</em> = 50 bar. Typical contaminations present in Fe single crystals are C, O and S. Especially S contamination is hard to remove and usually requires week-long atmospheric pressure hydrogen treatments at high temperatures. In this work, we show a fast method that achieves a deep removal of non-metal trace impurities of the Fe surface and bulk in under a day. The cleanliness of the single crystals was studied by low-energy electron diffraction (LEED) and X-ray photoelectron spectroscopy (XPS). The cleaning procedure consisted of a high-pressure H₂-treatment and subsequent sputtering and annealing in vacuum at ∼650°C to obtain clean LEED images. Clean (1 × 1) patterns were recorded for Fe(100), Fe(111) and Fe(110). Before undergoing high-pressure H₂-treatment, impurities in Fe(100) and Fe(111) present faceted surfaces, whereas Fe(110) shows complex overstructures. Further confirmation for successful reduction is given by XPS results. Fe2p_3/2 of cleaned samples is shown to be at 706.7 eV. Moreover, ultraviolet photoelectron spectroscopy (UPS) was employed for valence band and work function measurements.</div></div>","PeriodicalId":22100,"journal":{"name":"Surface Science","volume":"765 ","pages":"Article 122878"},"PeriodicalIF":1.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145518122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First-principles study of dehydrogenation on group IV elements Si, Ge, or Sn doped MgH2(110) surface","authors":"Yuhan Wang,&nbsp;Xingzhou Zhang,&nbsp;Zhiyuheng Li,&nbsp;Yan Li,&nbsp;Nanyu Cheng,&nbsp;Yijing Huang,&nbsp;Yongxin Wang","doi":"10.1016/j.susc.2025.122896","DOIUrl":"10.1016/j.susc.2025.122896","url":null,"abstract":"<div><div>The dehydrogenation on group IV elements Si, Ge, or Sn doped MgH₂(110) surface was investigated by first-principles calculations. In addition, the dopant site preference was determined by comparing the total energies of different doping site systems. The results showed that Si and Ge prefer to occupy interstitial sites, while Sn prefers to replace one Mg atom. The electronic structure and density of states show that the doping of Si, Ge, or Sn significantly weakens the Mg-H bond on the surface of MgH₂(110), and the band gap of the system is reduced, leading to structural instability. Finally, the calculated results of dehydrogenation energy and activation energy barrier indicated that Ge best improves the thermodynamics and hydrogen desorption kinetics of the MgH₂(110) surface, followed by Si and Sn.</div></div>","PeriodicalId":22100,"journal":{"name":"Surface Science","volume":"766 ","pages":"Article 122896"},"PeriodicalIF":1.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145683019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Theoretical study of hydrogen activation and reduction of an oxidized maghemite surface, γ-Fe₂O₃, (001) by monovacancy formation: An analysis using density functional theory (DFT)","authors":"Yenner Bentarcurt ,&nbsp;Mónica Calatayud ,&nbsp;Javier Fernández-Sanz ,&nbsp;Jaime Klapp ,&nbsp;Fernando Ruette","doi":"10.1016/j.susc.2025.122877","DOIUrl":"10.1016/j.susc.2025.122877","url":null,"abstract":"<div><div>The theoretical investigation of the H₂ interaction with the stable (001) oxidized maghemite surface revealed the feasibility of physisorption on different O-top and Fe-O bridge sites. Water and O vacancy formations at O-center sites occurred in a single step with energy barriers ranging from 1.65 to 2.20 eV. Two reaction steps were identified for the formation of O vacancies (Ov) on heterolytic two-center sites. In the first step, the H₂ dissociation occurs through an intermediate with O<img>H and Fe-H bonds on the surface, the energy barriers being the range of 0.45–0.87 eV. In the second step, Fe-bonded hydrogen migrates to the nearby O atom, with energy barriers of 0.25–0.65 eV. The formation of an Ov results in a reduction of the surface accompanied by an increase in the d-electron states close to the Fermi level, as indicated by the rise of Fe electronic density. A second H₂ molecule heterolytically dissociated on the reduced surface exhibited similar dissociation energies but higher stability than that on the oxidized surface. The PDOS of the 1<em>s</em> orbitals of H atoms adsorbed on the reduced surface showed that those bonded to Fe atoms were close to the Fermi level, indicating high reactivity toward hydrogenation.</div></div>","PeriodicalId":22100,"journal":{"name":"Surface Science","volume":"765 ","pages":"Article 122877"},"PeriodicalIF":1.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145569909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}