Progress in Surface Science最新文献

{"title":"Sum frequency generation vibrational spectroscopy (SFG-VS) for complex molecular surfaces and interfaces: Spectral lineshape measurement and analysis plus some controversial issues","authors":"Hong-Fei Wang","doi":"10.1016/j.progsurf.2016.10.001","DOIUrl":"https://doi.org/10.1016/j.progsurf.2016.10.001","url":null,"abstract":"<div><p><span>Sum-frequency generation vibrational spectroscopy (SFG-VS) was first developed in the 1980s and it has been proven a uniquely sensitive and surface/interface selective spectroscopic probe for characterization of the structure, conformation and dynamics of </span>molecular surfaces and interfaces. In recent years, there have been many progresses in the development of methodology and instrumentation in the SFG-VS toolbox that have significantly broadened the application to complex molecular surfaces and interfaces. In this review, after presenting a unified view on the theory and methodology focusing on the SFG-VS spectral lineshape, as well as the new opportunities in SFG-VS applications with such developments, some of the controversial issues that have been puzzling the community are discussed. The aim of this review is to present to the researchers and students interested in molecular surfaces and interfacial sciences up-to-date perspectives complementary to the existing textbooks and reviews on SFG-VS.</p></div>","PeriodicalId":416,"journal":{"name":"Progress in Surface Science","volume":"91 4","pages":"Pages 155-182"},"PeriodicalIF":6.4,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.progsurf.2016.10.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2621774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antibacterial surface design – Contact kill","authors":"Rajbir Kaur ,&nbsp;Song Liu","doi":"10.1016/j.progsurf.2016.09.001","DOIUrl":"https://doi.org/10.1016/j.progsurf.2016.09.001","url":null,"abstract":"<div><p><span>Designing antibacterial surfaces has become extremely important to minimize Healthcare Associated Infections which are a major cause of mortality worldwide. A previous biocide-releasing approach is based on leaching of encapsulated biocides such as silver<span> and triclosan<span><span><span> which exerts negative impacts on the environment and potentially contributes to the development of bacterial resistance. This drawback of leachable compounds led to the shift of interest towards a more sustainable and environmentally friendly approach: contact-killing surfaces. Biocides that can be bound onto surfaces to give the substrates contact-active antibacterial activity include quaternary </span>ammonium compounds (QACs), quaternary phosphoniums (QPs), </span>carbon nanotubes<span>, antibacterial peptides, and </span></span></span></span><em>N</em>-chloramines. Among the above, QACs and <em>N</em>-chloramines are the most researched contact-active biocides. We review the engineering of contact-active surfaces using QACs or <em>N</em><span>-chloramines, the modes of actions as well as the test methods. The charge-density threshold of cationic surfaces for desired antibacterial efficacy and attempts to combine various biocides for the generation of new contact-active surfaces are discussed in detail. Surface positive charge density is identified as a key parameter to define antibacterial efficacy. We expect that this research field will continue to attract more research interest in view of the potential impact of self-disinfective surfaces on healthcare-associated infections, food safety and corrosion/fouling resistance required on industrial surfaces such as oil pipes and ship hulls.</span></p></div>","PeriodicalId":416,"journal":{"name":"Progress in Surface Science","volume":"91 3","pages":"Pages 136-153"},"PeriodicalIF":6.4,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.progsurf.2016.09.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2621776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Self-assembly of metal–organic coordination structures on surfaces","authors":"Lei Dong ,&nbsp;Zi’Ang Gao ,&nbsp;Nian Lin","doi":"10.1016/j.progsurf.2016.08.001","DOIUrl":"https://doi.org/10.1016/j.progsurf.2016.08.001","url":null,"abstract":"<div><p><span>Metal–organic coordination structures are materials comprising reticular metal centers and organic linkers in which the two constituents bind with each other via metal–ligand coordination interaction. The underlying chemistry<span> is more than a century old but has attracted tremendous attention in the last two decades owing to the rapidly development of metal–organic (or porous coordination) frameworks. These metal-coordination materials exhibit extraordinarily versatile topologies<span> and many potential applications. Since 2002, this traditionally three-dimensional chemistry has been extended to two-dimensional space, that is, to synthesize metal–organic coordination structures directly on solid surfaces<span>. This endeavor has made possible a wide range of so-called surface-confined metal–organic networks (SMONs) whose topology, composition, property and function can be tailored by applying the principle of rational design. The </span></span></span></span>coordination chemistry manifests unique characteristics at the surfaces, and in turn the surfaces provide additional control for design structures and properties that are inaccessible in three-dimensional space.</p><p>In this review, our goal is to comprehensively cover the progress made in the last 15<!--> <span><span><span>years in this rapidly developing field. The review summarizes (1) the experimental and theoretical techniques used in this field including scanning tunneling microscopy and spectroscopy, low-energy electron diffraction, X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, </span>density functional theory, and Monte Carlo and kinetic </span>Monte Carlo simulation; (2) molecular ligands, metal atoms, substrates, and coordination motifs utilized for synthesizing SMON; (3) representative SMON structures with different topologies ranging from finite-size discrete clusters to one-dimensional chains, two-dimensional periodical frameworks and random networks; and (4) the properties and potential applications of SMONs. We conclude the review with some perspectives.</span></p></div>","PeriodicalId":416,"journal":{"name":"Progress in Surface Science","volume":"91 3","pages":"Pages 101-135"},"PeriodicalIF":6.4,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.progsurf.2016.08.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2621775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adsorption structures and energetics of molecules on metal surfaces: Bridging experiment and theory","authors":"Reinhard J. Maurer ,&nbsp;Victor G. Ruiz ,&nbsp;Javier Camarillo-Cisneros ,&nbsp;Wei Liu ,&nbsp;Nicola Ferri ,&nbsp;Karsten Reuter ,&nbsp;Alexandre Tkatchenko","doi":"10.1016/j.progsurf.2016.05.001","DOIUrl":"https://doi.org/10.1016/j.progsurf.2016.05.001","url":null,"abstract":"<div><p><span><span>Adsorption geometry and stability of organic molecules on surfaces are key parameters that determine the observable properties and functions of hybrid inorganic/organic systems (HIOSs). Despite many recent advances in precise experimental characterization and improvements in first-principles electronic structure methods, reliable databases of structures and energetics for large adsorbed molecules are largely amiss. In this review, we present such a database for a range of molecules adsorbed on metal single-crystal surfaces. The systems we analyze include noble-gas atoms, conjugated aromatic molecules, </span>carbon nanostructures<span>, and heteroaromatic compounds adsorbed on five different metal surfaces. The overall objective is to establish a diverse benchmark dataset that enables an assessment of current and future electronic structure methods, and motivates further experimental studies that provide ever more reliable data. Specifically, the benchmark structures and energetics from experiment are here compared with the recently developed van der Waals (vdW) inclusive density-functional theory (DFT) method, DFT</span></span> <!-->+<!--> <!-->vdW^surf<span>. In comparison to 23 adsorption heights and 17 adsorption energies from experiment we find a mean average deviation of 0.06</span> <!-->Å and 0.16<!--> <!-->eV, respectively. This confirms the DFT<!--> <!-->+<!--> <!-->vdW^surf method as an accurate and efficient approach to treat HIOSs. A detailed discussion identifies remaining challenges to be addressed in future development of electronic structure methods, for which the here presented benchmark database may serve as an important reference.</p></div>","PeriodicalId":416,"journal":{"name":"Progress in Surface Science","volume":"91 2","pages":"Pages 72-100"},"PeriodicalIF":6.4,"publicationDate":"2016-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.progsurf.2016.05.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3390754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wishful Thinking? Inside the Black Box of Exposure Assessment.","authors":"Annemarie Money, Christine Robinson, Raymond Agius, Frank de Vocht","doi":"10.1093/annhyg/mev098","DOIUrl":"10.1093/annhyg/mev098","url":null,"abstract":"<p><strong>Background: </strong>Decision-making processes used by experts when undertaking occupational exposure assessment are relatively unknown, but it is often assumed that there is a common underlying method that experts employ. However, differences in training and experience of assessors make it unlikely that one general method for expert assessment would exist. Therefore, there are concerns about formalizing, validating, and comparing expert estimates within and between studies that are difficult, if not impossible, to characterize. Heuristics on the other hand (the processes involved in decision making) have been extensively studied. Heuristics are deployed by everyone as short-cuts to make the often complex process of decision-making simpler, quicker, and less burdensome. Experts' assessments are often subject to various simplifying heuristics as a way to reach a decision in the absence of sufficient data. Therefore, investigating the underlying heuristics or decision-making processes involved may help to shed light on the 'black box' of exposure assessment.</p><p><strong>Methods: </strong>A mixed method study was conducted utilizing both a web-based exposure assessment exercise incorporating quantitative and semiqualitative elements of data collection, and qualitative semi-structured interviews with exposure assessors. Qualitative data were analyzed using thematic analysis.</p><p><strong>Results: </strong>Twenty-five experts completed the web-based exposure assessment exercise and 8 of these 25 were randomly selected to participate in the follow-up interview. Familiar key themes relating to the exposure assessment exercise emerged; 'intensity'; 'probability'; 'agent'; 'process'; and 'duration' of exposure. However, an important aspect of the detailed follow-up interviews revealed a lack of structure and order with which participants described their decision making. Participants mostly described some form of an iterative process, heavily relying on the anchoring and adjustment heuristic, which differed between experts.</p><p><strong>Conclusion: </strong>In spite of having undertaken comparable training (in occupational hygiene or exposure assessment), experts use different methods to assess exposure. Decision making appears to be an iterative process with heavy reliance on the key heuristic of anchoring and adjustment. Using multiple experts to assess exposure while providing some form of anchoring scenario to build from, and additional training in understanding the impact of simple heuristics on the process of decision making, is likely to produce a more methodical approach to assessment; thereby improving consistency and transparency in expert exposure assessment.</p>","PeriodicalId":416,"journal":{"name":"Progress in Surface Science","volume":"45 1","pages":"421-31"},"PeriodicalIF":0.0,"publicationDate":"2016-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4815939/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75480594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Superhydrophocity via gas-phase monomers grafting onto carbon nanotubes","authors":"Jinlong Zha ,&nbsp;Nicolas Batisse ,&nbsp;Daniel Claves ,&nbsp;Marc Dubois ,&nbsp;Lawrence Frezet ,&nbsp;Alexander P. Kharitonov ,&nbsp;Leonid N. Alekseiko","doi":"10.1016/j.progsurf.2016.03.002","DOIUrl":"https://doi.org/10.1016/j.progsurf.2016.03.002","url":null,"abstract":"<div><p><span>Superhydrophobic<span> films were prepared using dispersions of fluorinated multi-walled carbon nanotubes<span><span> (MWCNTs) or nanofibers<span><span> (CNFs) in toluene. The grafting of polystyrene allowed stable dispersions to be obtained. The grafting of polystyrene (PS), polyacrylic acid (PAA) and polyaniline (PANI) onto nanofibers and MWCNTs was first evidenced by </span>solid state NMR<span> and Infrared Spectroscopy. The graft polymerization of styrene, </span></span></span>acrylic acid<span><span> and aniline monomers<span> was initiated by radicals (dangling bonds) formed due to the initial fluorination<span>. The process appeared as highly versatile and efficient for different polymers. The consumption of those radicals in the course of grafting was evidenced by EPR, through decrease of the spin density. The hydrophobic/hydrophilic character was tuned according to the grafted polymer nature, i.e. hydrophobic with PS or hydrophilic with PAA. Finally, in order to reach superhydrophobicity, films were prepared from CNFs or MWCNTs, irrespective of their average diameter, that allowed adequate structuring of the surface. The presence of </span></span></span>fluorine atoms on their surface also favors superhydrophobicity. Water contact angles of 155</span></span></span></span> <!-->±<!--> <!-->2° and 159<!--> <!-->±<!--> <!-->2° were measured for the films casted from fluorinated CNFs or MWCNTs with grafted polystyrene, respectively.</p></div>","PeriodicalId":416,"journal":{"name":"Progress in Surface Science","volume":"91 2","pages":"Pages 57-71"},"PeriodicalIF":6.4,"publicationDate":"2016-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.progsurf.2016.03.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2401962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surface physics of semiconducting nanowires","authors":"Michele Amato ,&nbsp;Riccardo Rurali","doi":"10.1016/j.progsurf.2015.11.001","DOIUrl":"https://doi.org/10.1016/j.progsurf.2015.11.001","url":null,"abstract":"<div><p>Semiconducting nanowires<span> (NWs) are firm candidates for novel nanoelectronic devices and a fruitful playground for fundamental physics.</span></p><p>Ultra-thin nanowires, with diameters below 10<!--> <!-->nm, present exotic quantum effects due to the confinement of the wave functions, e.g. widening of the electronic band-gap, deepening of the dopant states. However, although several reports of sub-10<!--> <!-->nm wires exist to date, the most common NWs have diameters that range from 20 to 200<!--> <!-->nm, where these quantum effects are absent or play a very minor role. Yet, the research activity on this field is very intense and these materials still promise to provide an important paradigm shift for the design of emerging electronic devices and different kinds of applications. A legitimate question is then: what makes a nanowire different from bulk systems? The answer is certainly the large surface-to-volume ratio.</p><p>In this article we discuss the most salient features of surface physics and chemistry<span> in group-IV semiconducting nanowires, focusing mostly on Si NWs. First we review the state-of-the-art of NW growth to achieve a smooth and controlled surface morphology. Next we discuss the importance of a proper surface passivation and its role on the NW electronic properties. Finally, stressing the importance of a large surface-to-volume ratio and emphasizing the fact that in a NW the surface is where most of the action takes place, we discuss molecular sensing and molecular doping.</span></p></div>","PeriodicalId":416,"journal":{"name":"Progress in Surface Science","volume":"91 1","pages":"Pages 1-28"},"PeriodicalIF":6.4,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.progsurf.2015.11.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2401963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Oxygen adsorption on surfaces studied by a spin- and alignment-controlled O2 beam","authors":"Mitsunori Kurahashi","doi":"10.1016/j.progsurf.2016.03.001","DOIUrl":"https://doi.org/10.1016/j.progsurf.2016.03.001","url":null,"abstract":"<div><p><span>Molecular oxygen (O</span>₂<span>) is a paramagnetic linear molecule, yet the effect of its molecular alignment and electron spin on the dynamics of O</span>₂ adsorption has remained unclear. Recently, it has been however shown that the use of magnetic hexapolar field allows us to prepare a single spin-rotational state [(<span><math><mrow><mi>J</mi><mtext>,</mtext><mi>M</mi></mrow></math></span>)<!--> <!-->=<!--> <!-->(2,<!--> <!-->2)] selected O₂<span> beam for which both the molecular alignment and the spin state of O</span>₂ are well defined. State-resolved studies of O₂ sticking on Si(1<!--> <!-->0<!--> <!-->0), Al(1<!--> <!-->1<!--> <!-->1), Ni(1<!--> <!-->1<!--> <!-->1) surfaces conducted with this beam have clarified that the O₂<span> sticking probability depends strongly on the molecular alignment and the spin orientation of O</span>₂ relative to the surface. The mechanism of O₂ adsorption on Al(1<!--> <!-->1<!--> <span>1) has been disputed in the past few decades, but the observed steric effect has provided a reasonable picture for it. The preparation method of the state-selected O</span>₂ beam and its application to the alignment- and spin-resolved O₂ sticking studies are reviewed.</p></div>","PeriodicalId":416,"journal":{"name":"Progress in Surface Science","volume":"91 1","pages":"Pages 29-55"},"PeriodicalIF":6.4,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.progsurf.2016.03.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2120071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Growth morphology and properties of metals on graphene","authors":"Xiaojie Liu ,&nbsp;Yong Han ,&nbsp;James W. Evans ,&nbsp;Albert K. Engstfeld ,&nbsp;R. Juergen Behm ,&nbsp;Michael C. Tringides ,&nbsp;Myron Hupalo ,&nbsp;Hai-Qing Lin ,&nbsp;Li Huang ,&nbsp;Kai-Ming Ho ,&nbsp;David Appy ,&nbsp;Patricia A. Thiel ,&nbsp;Cai-Zhuang Wang","doi":"10.1016/j.progsurf.2015.07.001","DOIUrl":"https://doi.org/10.1016/j.progsurf.2015.07.001","url":null,"abstract":"<div><p><span>Graphene, a single atomic layer of graphite, has been the focus of recent intensive studies due to its novel electronic and structural properties. Metals grown on graphene also have been of interest because of their potential use as metal contacts in graphene devices, for spintronics applications, and for catalysis. All of these applications require good understanding and control of the metal growth morphology, which in part reflects the strength of the metal–graphene bond. Also of importance is whether the interaction between graphene and metal is sufficiently strong to modify the electronic structure of graphene. In this review, we will discuss recent experimental and computational studies related to deposition of metals on graphene supported on various substrates (SiC, SiO</span>₂<span>, and hexagonal close-packed metal surfaces). Of specific interest are the metal–graphene interactions (adsorption energies and diffusion<span> barriers of metal adatoms), and the crystal structures and thermal stability of the metal nanoclusters.</span></span></p></div>","PeriodicalId":416,"journal":{"name":"Progress in Surface Science","volume":"90 4","pages":"Pages 397-443"},"PeriodicalIF":6.4,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.progsurf.2015.07.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2401964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polar discontinuities and 1D interfaces in monolayered materials","authors":"Rafael Martinez-Gordillo ,&nbsp;Miguel Pruneda","doi":"10.1016/j.progsurf.2015.08.001","DOIUrl":"https://doi.org/10.1016/j.progsurf.2015.08.001","url":null,"abstract":"<div><p>Interfaces are the birthplace of a multitude of fascinating discoveries in fundamental science, and have enabled modern electronic devices, from transistors, to lasers, capacitors or solar cells. These interfaces between bulk materials are always bi-dimensional (2D) ‘surfaces’. However the advent of graphene and other 2D crystals opened up a world of possibilities, as in this case the interfaces become one-dimensional (1D) lines. Although the properties of 1D nanoribbons have been extensively discussed in the last few years, 1D interfaces within infinite 2D systems had remained mostly unexplored until very recently. These include grain boundaries in polycrystalline samples, or interfaces in hybrid 2D sheets composed by segregated domains of different materials (as for example graphene/BN hybrids, or chemically different transition metal dichalcogenides). As for their 2D counterparts, some of these 1D interfaces exhibit polar characteristics, and can give rise to fascinating new physical properties. Here, recent experimental discoveries and theoretical predictions on the polar discontinuities that arise at these 1D interfaces will be reviewed, and the perspectives of this new research topic, discussed.</p></div>","PeriodicalId":416,"journal":{"name":"Progress in Surface Science","volume":"90 4","pages":"Pages 444-463"},"PeriodicalIF":6.4,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.progsurf.2015.08.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2621777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}