Plasma Chemistry and Plasma Processing最新文献

{"title":"Plasma and Flow Simulation of the Ion Wind in a Surface Barrier Discharge Used for Gas Conversion Benchmarked by Schlieren Imaging","authors":"S. Mohsenimehr,&nbsp;S. Wilczek,&nbsp;T. Mussenbrock,&nbsp;A. von Keudell","doi":"10.1007/s11090-024-10533-0","DOIUrl":"10.1007/s11090-024-10533-0","url":null,"abstract":"<div><p>Surface dielectric barrier discharges (sDBD) are efficient and scalable plasma sources for plasma-based gas conversion. One prominent feature of an sDBD is the generation of an ion wind, which exerts a force on the neutrals, thus leading to an efficient mixing of plasma and a passing gas stream. This becomes apparent by the creation of upstream and downstream vortices in the vicinity of the plasma. In this study, these vortices are generated by high voltage burst pulses consisting of two half cycles of an almost sinusoidal voltage shape. The vortices are monitored by Schlieren imaging diagnostic to benchmark and connect two simulations of the sDBD: a plasma model simulating a streamer for 25 ns starting from the electrode and propagating along a dielectric surface followed by a decay. The streamer is the source of electrical charges accelerated as ion wind by the applied electric field from the sDBD power supply. A second flow simulation models this ion wind as a time-averaged thrust acting on the passing gas stream. The conversion of the time-resolved forces from the nanosecond plasma simulation into the steady state thrust in the flow simulation indicates that the force from the plasma lasts much longer than the actual streamer propagation phase. This is explained by the fact that the charges in the streamer channel remain present for almost 100 ns, and the voltage from the power supply lasts for a few microseconds being applied to the electrode so that ions in the streamer channel are still accelerated even after a streamer stops to propagate after a few ns. The thrust generated during the streamer phase, including the relaxation phase, agrees well with predictions from flow simulation. Additionally, properly converting the time-resolved forces from the plasma simulation into a time-averaged thrust for the flow simulation yields exactly the synthetic Schlieren images as measured in the experiments.\u0000</p></div>","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":"45 1","pages":"85 - 112"},"PeriodicalIF":2.6,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11090-024-10533-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142940990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Separation of Plasma Species for Investigating the Impact of Hydrogen Plasmas on the Work Function of Caesiated Surfaces","authors":"A. Heiler,&nbsp;R. Friedl,&nbsp;U. Fantz","doi":"10.1007/s11090-024-10529-w","DOIUrl":"10.1007/s11090-024-10529-w","url":null,"abstract":"<div><p>In negative hydrogen ion sources in situ adsorption of Cs is typically used to generate low work function converter surfaces. The achievement of a temporally stable low work function coating is, however, challenging due to the hydrogen plasma interaction with the surface. Particularly in ion sources for neutral beam injection systems for fusion with pulse durations of minutes to hours temporal instabilities are a major issue and limit the source performance. To clarify the influence of the hydrogen plasma on the converter surface, investigations are performed at an experiment equipped with an absolute work function diagnostic based on the photoelectric effect. Caesiated surfaces are exposed to the full plasma impact by the generation of plasmas in front of the surface as well as to selected plasma species (H atoms, positive ions and VUV/UV photons) from an external plasma source to identify driving mechanisms that lead to surface changes. Depending on the exposure time and initial surface condition, the plasma strongly affects the surface in terms of work function and quantum efficiency (QE). For degraded Cs layers (work function <span>(ge 3)</span> eV) a favorable increase in QE and reduction in work function can be achieved, while for Cs layers with an ultra-low work function of <span>(1.2-1.3)</span> eV the opposite is true. It is found that each plasma species can influence the Cs layers and that VUV photons lead to a work function increase of ultra-low work function layers. For sufficiently high VUV fluences a severe work function increase by 0.5 eV is given, highlighting the relevance of photochemical processes in the plasma-surface interaction and demonstrating that ultra-low work function layers are not stable in a hydrogen plasma environment.</p></div>","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":"45 1","pages":"1 - 20"},"PeriodicalIF":2.6,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11090-024-10529-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142940984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transient Spark Plasma-Treated L-Cysteine Reduces CCl4-Induced Hepatotoxicity in Rats","authors":"Masume Farhadi,&nbsp;Farshad Sohbatzadeh,&nbsp;Akbar Hajizadeh Moghaddam,&nbsp;Yasaman Firouzjaei","doi":"10.1007/s11090-024-10527-y","DOIUrl":"10.1007/s11090-024-10527-y","url":null,"abstract":"<div><p>Cold plasmas have been considered an effective method in numerous scientific fields. One excellent target for plasma treatment is amino acids. Transient spark plasma discharge (TSP) is very useful in changing the chemical structures of biological systems due to its high electron density. TSP discharges as DC-driven self-pulsing discharges allow ionization and effective chemical processes to be performed easily. This type of plasma discharge consists of numerous streamers with a high electric field that can be transferred into short spark current pulses. In this study, we utilized a pin-to-ring TSP with a fixed voltage and frequency of ~ 5 kV and 220 Hz, respectively. The present study was conducted to estimate the synergetic effect of a TSP device and cysteine (Cys) in stopping hepatotoxicity. The interaction of Ar plasma with Cys solution was investigated by LCMS/MS, revealing that many new biochemical products with different molecular weights were produced under plasma treatment. Glutathione (GSH) level and DPPH scavenging activity were performed. Biochemical markers and histopathological analysis were also evaluated. Results revealed that by increased levels of GSH and anti-oxidant activity, PTC solution can preserve as opposed to injuries caused by CCl₄ injection to a greater extent than untreated Cys even at a low dose of amino acid. The ALP, ALT, and AST activity levels were closer to the normal level when PTC was received than Cys. After receiving PTC, more positive liver and kidney tissue changes were observed in the CCl₄ group. It also had a great impact on oxidative antioxidant parameters. Therefore, PTC as an effective drug has shown a positive effect in inhibiting hepatotoxicity because it contains various biomolecules under the influence of the plasma-produced reactive species.</p></div>","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":"45 1","pages":"279 - 296"},"PeriodicalIF":2.6,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Perspectives on Coupling Nonthermal Plasma Generated in Gas–Liquid Water Environments with Microbes","authors":"Bruce R. Locke,&nbsp;Erin Petkus,&nbsp;Cesar Rodriguez","doi":"10.1007/s11090-024-10530-3","DOIUrl":"10.1007/s11090-024-10530-3","url":null,"abstract":"<div><p>The large natural metabolic diversity of microorganisms has allowed them to survive in very harsh conditions of high temperature, high ionizing radiation, and high concentrations of reactive chemical species. The environment of low temperature plasma generated with liquids is comparable to many natural conditions (high temperature, highly oxidative, presence of various types of radiation) and thus suggests microbes can evolve or be engineered to not only survive but thrive in such extreme conditions. The evidence from the literature and previous work suggests that the in-situ coupling of engineered and evolved strains of bacteria with low temperature plasma generated with liquid water may provide enhanced functionality with respect to organic chemical reactions.</p></div>","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":"45 1","pages":"463 - 483"},"PeriodicalIF":2.6,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of Acetylene and Benzene in Controlled Methane-Plasma System","authors":"Rostislav Kapustin,&nbsp;Iosif Grinvald,&nbsp;Alina Agrba,&nbsp;Ilya Vorotyntsev,&nbsp;Vladimir Vorotyntsev,&nbsp;Sergey Suvorov,&nbsp;Alexandra Barysheva,&nbsp;Pavel Grachev,&nbsp;Dmitry Shablykin,&nbsp;Anton Petukhov,&nbsp;Artem Atlaskin,&nbsp;Anton Lukoyanov,&nbsp;Andrey Vorotyntsev","doi":"10.1007/s11090-024-10528-x","DOIUrl":"10.1007/s11090-024-10528-x","url":null,"abstract":"<div><p>High-energy chemistry is a method of accelerating chemical reactions by transferring copious amounts of energy to individual molecules. The synthesis of acetylene and benzene is a valuable chemical process used in many organic products. The article proposes an original scheme of experimental setup and technology for plasma-activated methane conversion into acetylene and benzene. The system enables the creation of two distinct active zones within the reactor: the “hot zone,” where plasma and active elements are generated, and the “relaxation zone,” where the synthesis of organic products occurs. The optimal temperature of the blowing gas, i.e., the gas that propels the plasma reactor walls, has been found to be a crucial factor in heat removal from reaction zones. This temperature has been observed to vary within an interval of 290–310°K, while the reactor gas pressure has been identified as a significant variable within a range of 10–40 mbar. These two factors have been identified as the primary determinants of the yield of products, with acetylene yields reaching approximately 70–80% and maximal benzene yields reaching 40%. Furthermore, the duration of plasma exposure is a critical variable in methane conversion. The optimal acetylene yield of 80% was achieved when the reactor was operated in stationary mode for 15 s. A variation of the input gas flow in flow mode within an interval of 5–15 m³/h resulted in a decrease in the yield of acetylene to 60 percent, while an increase in the benzene yield up to 50 percent was observed. This was accompanied by an overall increase in the total volume of products produced per time unit. A general qualitative model of methane reforming is proposed, combining methane dehydration in the plasma flame with direct synthesis of acetylene from carbon and hydrogen atoms in the relaxation zone. Benzene formation occurs through the trimerization of acetylene molecules under heat dissipation near the reactor walls.</p></div>","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":"45 1","pages":"351 - 369"},"PeriodicalIF":2.6,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142940996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of Novel Anode Structure on the Heat Flow Characteristics and Jet Stability of Pure Nitrogen Laminar Torch","authors":"Xiuquan Cao,&nbsp;Yong He,&nbsp;Jin Tao,&nbsp;Haoming Xu,&nbsp;Guangzhong Hu,&nbsp;Chao Li","doi":"10.1007/s11090-024-10526-z","DOIUrl":"10.1007/s11090-024-10526-z","url":null,"abstract":"<div><p>For improving the jet stability of pure laminar plasma torch to ensure the consistency of the surface treatment, based on previous studies, a novel anode structure, named as internal step anode, has been proposed. Sequences, the effects of axial lengths of the internal step anode on the jet stability and heat flow characteristics have been explored by using a home-made simulation model. Finally, corresponding experiments have been conducted to verify the effectiveness of the anode optimization. Research results show that: (1) With increasing the axial lengths of the internal step anode, the temperature and velocity of the anode area increase slightly, on the contrary, the corresponding anode current density decreases slightly, which is conducive to extending the electrode life; (1) the internal step anode is beneficial for improving the jet stability of pure laminar plasma torch. With increasing the axial length of the internal step anode, the jet stability increases to certain level and then decreases smoothly. When the axial length is 5 mm, the plasma torch presents the highest jet stability.</p></div>","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":"45 1","pages":"403 - 419"},"PeriodicalIF":2.6,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Different Grain Sizes of ({mathrm{{MgAl}}_2mathrm{{O}}_4}) Doped Alumina and Its Influence on SPD, CDBD, and APTD","authors":"R. Pribyl,&nbsp;J. Lexmaul,&nbsp;M. Pazderka,&nbsp;P. Stastny,&nbsp;J. Kelar","doi":"10.1007/s11090-024-10523-2","DOIUrl":"10.1007/s11090-024-10523-2","url":null,"abstract":"<div><p>The paper is focused on studying magnesium spinel-doped alumina tapes and their effect on plasma. Developed tapes were made from a mixture of <span>(15,mathrm {vol.%})</span> of <span>(mathrm {MgAl_2O_4})</span> by the gel tape casting method. Ceramic tapes were sintered at different temperatures from <span>(1450,^circ {textrm{C}})</span> up to <span>(1700,^circ {textrm{C}})</span>. The sintering temperature significantly influenced the material’s grain sizes, but the material’s chemical and phase composition was the same for all sintering temperatures. We measured the surface potential decay and showed that it is not enough to have fast surface potential decay for Atmospheric Pressure Townsend Discharge, but the homogeneity of the surface itself crucially influences the stability of Atmospheric Pressure Townsend Discharge. On the other hand, the ignition voltage of coplanar dielectric discharge was not influenced by the gran size difference.</p></div>","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":"45 1","pages":"69 - 83"},"PeriodicalIF":2.6,"publicationDate":"2024-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142940971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Inactivation of E. coli and B. subtilis Spores Treated Individually, Sequentially and Simultaneously with Humified Air Dielectric Barrier Discharge Plasma and Ultraviolet","authors":"Zhishang Wang,&nbsp;Xinlei Liang,&nbsp;Dongxue Feng,&nbsp;Jiang Wu,&nbsp;Di Dou,&nbsp;Huihui Wan,&nbsp;Weifeng Liu,&nbsp;Dongping Liu","doi":"10.1007/s11090-024-10524-1","DOIUrl":"10.1007/s11090-024-10524-1","url":null,"abstract":"<div><p>The objective of this study was to evaluate the efficacy of humified air dielectric barrier discharge cold plasma (CP) and ultraviolet (UV) at a wavelength of 254 nm in inactivating <i>Escherichia coli</i> (<i>E. coli</i>) and <i>Bacillus subtilis</i> spores (<i>B. subtilis</i> spores). The experimental results showed that simultaneous treatment with CP and UV had the highest antimicrobial activity, followed by sequential and individual treatments. Individual treatment of CP and UV for 10 s decreased <i>E. coli</i> by 2.4 Logs and 1.3 Logs, respectively. After 60 s of CP and UV treatment, <i>B. subtilis</i> spores were decreased by 2.6 Logs and 1.1 Logs, respectively. Simultaneous treatment of CP and UV for 10 s reduced <i>E. coli</i> by 4.6 Logs and <i>B. subtilis</i> spores by 4.4 Logs after 60 s, which was attributed to their synergistic effects. To elucidate the mechanism of protein oxidation in simultaneous treatments, we investigated the chemical stability of simultaneous treatments with CP and UV on 11 amino acids and 4 nucleobases in aqueous solution. Phenylalanine (Phe), methionine (Met), tyrosine (Tyr), tryptophan (Trp), and histidine (His) were oxidized by plasma-generated reactive oxygen and nitrogen species. In addition, guanine (G) and thymine (T) exhibited structural instability; both the five- membered and six-membered rings of guanine can be oxidized, and thymine undergoes oxidative cross-linking by UV-induced formation of thymine dimers. The analysis showed that the chemical instability of amino acids and nucleobases was closely related to the synergistic inactivation effect of CP and UV.</p></div>","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":"45 1","pages":"255 - 278"},"PeriodicalIF":2.6,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental and 2D Fluid Simulation of a Negative Nanosecond Discharge in Air Above a Liquid Surface with Different Dielectric Permittivity and Electrical Conductivity","authors":"Antoine Herrmann,&nbsp;Joëlle Margot,&nbsp;Ahmad Hamdan","doi":"10.1007/s11090-024-10525-0","DOIUrl":"10.1007/s11090-024-10525-0","url":null,"abstract":"<div><p>Plasma–liquid interaction remains a crucial phenomenon influencing numerous applications. Plasmas produced by electrical discharges exhibit properties that depend on the voltage polarity as well as on the liquid properties. In this study, we investigate the impact of liquid permittivity (<span>({upvarepsilon }_{{text{r}}} = { }32,{ }56,{text{ and }},80)</span>) and water electrical conductivity (<i>σ</i> = 2, 500, and 1000 μS/cm) on negative discharges initiated in air at atmospheric pressure. Using a negative pulsed nanosecond high-voltage setup with a pin-to-liquid configuration, experimental results demonstrate that increasing <span>({varepsilon }_{r})</span> leads to faster discharge ignition and higher discharge current. ICCD imaging reveals a decrease in the maximal radial extension of the discharge over the liquid surface with increasing <span>({varepsilon }_{r})</span>. Also, rising <i>σ</i> lead to an increase of the discharge current, and the ICCD images show a decrease in the radial propagation of the discharge over the solution. To gain deeper insights into the discharge dynamics and properties, a 2D fluid model is employed to simulate the various conditions. The results indicate that increasing <span>({varepsilon }_{r})</span> decreases the radial E-field produced by the surface ionization wave and increases the electron density in the air gap. Regarding <i>σ</i>, high-conductivity conditions result in lower radial E-field in the front of the surface ionization wave, explaining the shorter radial propagation of the discharge. Comparing negative with positive discharge, we observe that the former travels a shorter distance over the liquid surface due to its more diffuse front. Moreover, we note the absence of filamentation in the negative surface discharge, unlike the positive counterpart. This disparity is attributed to a relatively lower space charge contained in the front, thereby prohibiting the formation of individual filaments.</p></div>","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":"45 1","pages":"191 - 209"},"PeriodicalIF":2.6,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards the Understanding of Parameters Allowing to Anticipate the Precipitation Reaction of Metallic Precursors in Humid Air Gliding Arc Plasma Reactor","authors":"F. Hanon,&nbsp;M. Devillers,&nbsp;E. M. Gaigneaux","doi":"10.1007/s11090-024-10516-1","DOIUrl":"10.1007/s11090-024-10516-1","url":null,"abstract":"<div><p>The humid air gliding arc plasma (GP) has demonstrated its capability to synthesize catalysts (metal (hydr)oxides and supported catalysts) with intriguing properties and significant catalytic activity while employing interesting synthesis conditions compared to conventional catalyst synthesis. However, previous studies exposed various precursors to the plasma without prior knowledge of their reactivity through GP. The objective of this paper is to investigate the parameters influencing precursor reactivity and precipitation under humid air GP, by identifying commonalities between reactive and non-reactive precursors. Several factors were identified as predominant: the solubility of the precursor and precipitate, the acidification of the medium along exposure, the redox potential of reactions between the precursor and HNO₂/NO₂⁻ species plasma-generated, and the metal precursor nature. These identified factors have enabled us to create a dichotomous key that can be used for any type of precursors, allowing to anticipate their potential precipitation when exposed to the GP. By utilizing this key, we have identified two new precursors that react, forming new types of solids never synthesized before by GP: Au and Ru-based solids. This demonstrates that GP may be a promising method for developing new types of catalysts, such as metal-supported catalysts, but also indicates that a limited number of precursors may react, at least without changing the conventional synthesis parameters. Therefore, this article highlights both the possibilities and limitations of GP catalyst synthesis.</p></div>","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":"45 1","pages":"211 - 238"},"PeriodicalIF":2.6,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}