Synthetic Metals最新文献

{"title":"Dithieno[3,2-b:2′,3′-d]pyrrole-based hyperbranched conjugated copolymers as efficient fluorescent probes for the trace detection of picric acid","authors":"Cam Hong Thi Nguyen ,&nbsp;Minh Duy Hoang ,&nbsp;Thanh Tien Nguyen ,&nbsp;Tam Huu Nguyen ,&nbsp;Thao Phuong Le Nguyen ,&nbsp;Le-Thu Thi Nguyen ,&nbsp;Hai Le Tran ,&nbsp;Mai Ha Hoang ,&nbsp;Ha Tran Nguyen","doi":"10.1016/j.synthmet.2025.117828","DOIUrl":"10.1016/j.synthmet.2025.117828","url":null,"abstract":"<div><div>The rapid, selective and trace detection of nitroaromatic compounds is a critical global concern for public security and pollution control due to their potent explosive properties, toxic effects, and significant environmental impact. In this study, we developed a simple and efficient fluorescent sensor using hyperbranched conjugated copolymers (HPCs) containing dithieno[3,2-b:2′,3′-d]pyrrole (DTP) units for the first time to detect picric acid (PA) in all three states: solution, solid, and vapor. Two novel DTP-based HPCs, poly(TPA-<em>alt</em>-DTP) and poly(TPB-<em>alt</em>-DTP), were synthesized through a one-step A₂ + B₃ direct arylation polycondensation under aerobic conditions of DTP and tribromoaryl monomers such as triphenylamine (TPA) and triphenylbenzene (TPB). These hyperbranched polymers exhibited strong fluorescence and effective PA detection, achieving a very low detection limit of less than 1 μM. Furthermore, they demonstrated excellent selectivity for PA, reaching a fluorescence quenching efficiency of up to 90 % compared to other nitroaromatic interferences. The resulting polymers exhibited superior fluorescent quenching performance due to the hyperbranched structure in the backbone, which provided multi-dimensional transport pathways for excitons to migrate from the electron-rich polymer to the electron-deficient PA through a combination of static quenching and photo-induced electron transfer (PET) mechanisms. In comparison to previous reports, polymer-based fluorescent probes performed exceptionally well in solid and vapor states, sensing PA concentrations as low as 10⁻¹⁵ M using paper tests. The paper sensors proved effective in determining PA in solid, solution, and vapor forms, thereby enhancing their potential for on-site applications.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"311 ","pages":"Article 117828"},"PeriodicalIF":4.0,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improving efficiency and stability of inverted perovskite solar cells using C60/PTCDA binary electron transport layer","authors":"Mohamed M. Elnaggar ,&nbsp;Lyubov A. Frolova ,&nbsp;Nikita A. Emelianov ,&nbsp;Ivan Komarov ,&nbsp;Pavel A. Troshin","doi":"10.1016/j.synthmet.2025.117827","DOIUrl":"10.1016/j.synthmet.2025.117827","url":null,"abstract":"<div><div>Herein, we explored the application of perylenetetracarboxylic dianhydride (PTCDA) electron transport material for inverted perovskite solar cells (PSCs). We obtained a modest power conversion efficiency (PCE) of 15.0 % using PTCDA alone to form electron-transport layer (ETL) of p-i-n devices, whereas the combination of PCTDA with C₆₀ within a binary ETL delivered PCE of 19.8 %. The improved efficiency reached with binary ETL can be attributed to its ability to facilitate charge transfer and passivate traps the surface of the perovskite layer thus reducing recombination losses at the absorber/ETL interface. Further insights were provided by IR s-SNOM microscopy, which revealed that the binary C₆₀/PTCDA ETL has a highly uniform and homogeneous structure with low density of defects and pinholes, thus ensuring effective isolation of MAPbI₃ and effective operation of PSCs. Moreover, the binary C₆₀/PTCDA ETL improved the stability of PSCs under ambient conditions, so the devices exhibited no signs of degradation after 1000 h. These findings feature the potential of PTCDA as a promising organic component for designing engineered multicomponent ETLs for improving the performance and stability of PSCs.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"311 ","pages":"Article 117827"},"PeriodicalIF":4.0,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A-D-A small molecules featuring multi-fused rings and fluorinated benzothiadiazole for solution-processed organic field-effect transistors","authors":"Yu Hua ,&nbsp;Hoimin Kim ,&nbsp;Li Wang ,&nbsp;Young Yong Kim ,&nbsp;Boseok Kang ,&nbsp;Guobing Zhang","doi":"10.1016/j.synthmet.2025.117826","DOIUrl":"10.1016/j.synthmet.2025.117826","url":null,"abstract":"<div><div>Three small molecules with acceptor-donor-acceptor structure, featuring multi-fused rings (pentacyclic, heptacyclic, and octacyclic arenes) as donors and fluorinated benzothiadiazole as acceptor were synthesized and characterized for their applications in solution-processed organic field-effect transistors. The impact of different fused-ring structures of donor units on the optical and electrochemical properties, crystal structure, and charge carrier of the small molecule were systematically studied. The small molecule containing heptacyclic ladder-type arene demonstrated the highest field-effect performances, achieving a hole mobility of 0.29 cm²V^–1s^–1. Additionally, devices processed with non-chlorinated solvents also showed excellent mobility, approximately 0.20 cm²V^–1s^–1.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"311 ","pages":"Article 117826"},"PeriodicalIF":4.0,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electropolymerization and dual actuating-sensing capabilities of polypyrrole composites with two organic particles","authors":"Nguyen Quang Khuyen ,&nbsp;Zane Zondaka ,&nbsp;Toribio F. Otero ,&nbsp;Rudolf Kiefer","doi":"10.1016/j.synthmet.2025.117825","DOIUrl":"10.1016/j.synthmet.2025.117825","url":null,"abstract":"<div><div>Polypyrrole film composites were galvanostatically electropolymerized (EP) from suspensions of either chemically oxidized polypyrrole (CP) or carbide-derived carbon (CDC) particles, generating EPCP and EPCDC composite films. In addition to these particles the material includes anions of phosphotungstide acid (PTA), used to prepare the particle suspensions and dodecylbenzenesulfonate (DBS^-) used as electrolyte. The final composite materials were characterized using scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis and Fourier transform infrared (FTIR) spectroscopy, with their conductivity and density also measured. The dual actuating-sensing capabilities of the of the films (linear actuators) were quantified from their electrochemomechanical responses in organic electrolyte solution. Three different potential ranges were explored by cyclic voltammetry and square potential waves. The EPCP actuator, which expands upon reduction (cation-driven actuation) achieves a maximum strain of 2.6 %, while the EPCDC, which expands by oxidation (anion-driven) showed a maximum strain of 7.2 %. These values surpass those reported in the literature for other cation- or anion-driven PPy composites. The EPCP´s actuating charge density was 1.5–1.7 times higher than that of the EPCDC actuators. Despite the high material complexity improving dual and simultaneous actuating-sensing capabilities were achieved. In the studied potential ranges, both actuators work under charge balance, as proved by the coulovoltammetric responses. Future studies will explore the expected increase in actuator durability and charge storage capacity.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"311 ","pages":"Article 117825"},"PeriodicalIF":4.0,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical determination of heavy metals by a graphene quantum dots/porphyrin-based supramolecular system","authors":"Mariachiara Sarà ,&nbsp;Khouloud Abid ,&nbsp;Pietro Giuseppe Gucciardi ,&nbsp;Luigi Monsù Scolaro ,&nbsp;Giovanni Neri","doi":"10.1016/j.synthmet.2024.117824","DOIUrl":"10.1016/j.synthmet.2024.117824","url":null,"abstract":"<div><div>This work reports the development of an electrochemical sensor for heavy metals determination based on a graphene quantum dots/porphyrin (GQDs@TPPS) supramolecular system. GQDs@TPPS with different GQDs:TPPS ratios (ranging from 1:3–1:9 w/w) were first prepared and characterized by a series of techniques, including UV-Vis and fluorescence emission titration. These systems were used as electrode modifiers for developing modified screen-printed carbon electrode (SPCE) for the determination of heavy metal ions. The GQDs@TPPS/SPCE modified electrodes were found to be more suitable for the electro-analytical determination of Cd and Cu ions. Optimizing the GQDs:TPPS ratio, an improvement in the sensitivity, low limit of detection (LOD), and selectivity towards these two metal ions were obtained in comparison to bare/SPCE. The use of the developed GQDs@TPPS/SPCE sensors for the monitoring of Cd and Cu ions in seawater has been also demonstrated.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"311 ","pages":"Article 117824"},"PeriodicalIF":4.0,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unlocking the power of MOF-inspired nanomaterials: Enhancing solar cell efficiency through advanced structures and properties","authors":"Mustafa S. Alluhaibi ,&nbsp;Mohammad Shariq ,&nbsp;Fahad Alkhayri ,&nbsp;Rachid Karmouch ,&nbsp;Shahir Hussain ,&nbsp;Syed Kashif Ali ,&nbsp;Noorjahan Abdul Azeez ,&nbsp;Aalia Farid ,&nbsp;Marium Khan","doi":"10.1016/j.synthmet.2024.117823","DOIUrl":"10.1016/j.synthmet.2024.117823","url":null,"abstract":"<div><div>The transition to a carbon-neutral civilization relies heavily on harnessing sustainable and abundant natural energy sources like solar power. Solar energy offers an eco-friendly solution capable of meeting global energy demands, but the primary challenge lies in developing cost-effective and durable materials that can efficiently convert solar energy into electricity. Solar cells, through the photovoltaic effect, remain the most promising technology for this purpose. This paper presents a detailed review of the advancements in MOF-inspired nanomaterials and their application in solar cells, specifically focusing on dye-sensitized and perovskite solar cells. It covers the latest developments in MOFs and MOF-derived compositions, material architectures, synthesis techniques, and device processing methods. The paper emphasizes the roles of MOFs and their derivatives in enhancing solar cell performance, particularly as additives, electrodes, photoactive materials, and charge carriers. Moreover, it highlights the potential of MOFs to improve light absorption, charge transport, and long-term stability in solar cell devices. Additionally, we present an in-depth analysis of the challenges and opportunities for scaling up MOF-based materials in commercial solar cell applications, offering critical insights into future directions for optimizing their performance and overcoming existing barriers.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"311 ","pages":"Article 117823"},"PeriodicalIF":4.0,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phenanthro[9,10-d]imidazole having electroactive derivatives as potential host materials for third generation organic light emitting diodes","authors":"Daiva Tavgeniene ,&nbsp;Dovydas Blazevicius ,&nbsp;Mantas Kirstukas ,&nbsp;Gintare Krucaite ,&nbsp;Karolis Kazlauskas ,&nbsp;Dovydas Banevicius ,&nbsp;Vygintas Jankauskas ,&nbsp;Egidijus Kamarauskas ,&nbsp;Saulius Grigalevicius","doi":"10.1016/j.synthmet.2024.117822","DOIUrl":"10.1016/j.synthmet.2024.117822","url":null,"abstract":"<div><div>The new bipolar phenanthro[9,10-<em>d</em>]imidazole based compounds were synthesized from corresponding key starting aldehydes in reactions with phenanthrene-9,10-dione, ammonium acetate and aniline. Thermo-gravimetric analysis and differential scanning calorimetry confirmed that the new derivatives are highly thermally stable compounds and can form amorphous materials having very high glass transition temperatures exceeding 150 °C in some cases, which is big a advantage for the compounds with potential application in optoelectronic devices. Electron photoemission spectra of thin layers of the materials were used to determine ionization potentials of the materials, which are found to be in the range from 5.27 eV to 5.59 eV. LUMO energy levels of the materials were determined from their optical band gaps and values of the ionization potentials, and are in the range of 1.86–2.26 eV. Positive charge drift mobility in thin layers of some of the derivatives exceed 2.8 × 10⁻⁵ cm²V⁻¹s⁻¹ at high electric field at room temperature. Some of the developed materials were preliminary tested as hosts in red organic light-emitting diodes for commercial TADF based emitter: 7,10-bis(4-(diphenylamino)phenyl)-2,3-dicyanopyrazino-phenanthrene (TPA-DCPP). The results indicated that device with 9-(2-ethylhexyl)-3-(1-phenylphenanthro[9,10-<em>d</em>]imidazol-2-yl)carbazole exhibited good performance with rather low turn-on voltage of 3.5 V, maximum brightness of about 1000 cd/m² and peak efficiency exceeding 5.6%. The properties are better than those of a similar device using the well-known commercial host material: 4,4′-bis(9-carbazolyl)-1,1′-biphenyl (CBP).</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"311 ","pages":"Article 117822"},"PeriodicalIF":4.0,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of flexible polymer nanocomposite films of PVDF/BaFe12O19/g-C3N4 for efficient EMI shielding in X-band frequency","authors":"R. Nirmal Kumar ,&nbsp;J. Hemalatha","doi":"10.1016/j.synthmet.2024.117820","DOIUrl":"10.1016/j.synthmet.2024.117820","url":null,"abstract":"<div><div>Of late, synthesis and application of microwave-absorbing materials have become absolutely necessary to minimize the looming threat of electromagnetic (EM) pollution. The present study discusses the fabrication of multifunctional polymer nanocomposite films, presents the analysis of the resulting films using a polyvinylidene fluoride (PVDF) matrix with M-type barium hexaferrite (BaFe₁₂O₁₉) and graphitic carbon nitride (g-C₃N₄) fillers, and reports on their application in EM interference (EMI) shielding in the X-band (8–12 GHz) frequency range. Crystalline BaFe₁₂O₁₉ nanoparticles and g-C₃N₄ were prepared and used to fabricate PVDF/BaFe₁₂O₁₉/g-C₃N₄ composite films. The structural and compositional details of BaFe₁₂O₁₉ nanoparticles and the films were analyzed, along with the fraction of β-phase PVDF. The morphological, magnetic, ferroelectric, and dielectric properties of the films were studied using field emission scanning electron microscopy (FESEM), vibrating sample magnetometry, ferroelectric hysteresis, and dielectric response, respectively. In addition, the microwave absorption efficiency of the films was analyzed in the X-band frequency range with a vector network analyzer (VNA) using the waveguide technique. Magnetic loss observed in the films was due to domain wall resonance, whereas polarization, conduction, and eddy current losses were attributable to the interaction of PVDF, magnetic BaFe₁₂O₁₉, and semiconducting g-C₃N₄ fillers with the EM wave in the GHz frequency range. The VNA showed that the prepared PVDF/BaFe₁₂O₁₉/g-C₃N₄ composite films show a shielding efficiency of 99.9 %. In particular, the total shielding effectiveness (SE_T) of the film with 20 wt% of BaFe₁₂O₁₉ loading was found to be 52 dB in the X-band frequency range. Furthermore, the prepared films were flexible and showed high β fraction, saturation magnetization, and dielectric loss, along with moderate magnetic loss and high shielding efficiency, making them potential microwave absorbers in the GHz frequency region.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"311 ","pages":"Article 117820"},"PeriodicalIF":4.0,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Raspberry-like hollow carbon spheres: A promising electrode material for high-performance zinc-ion hybrid supercapacitors","authors":"Meng You,&nbsp;Xijun Zhao,&nbsp;Rongyu Lu,&nbsp;Jianxiang Ma,&nbsp;Xinghua Zhang,&nbsp;Chen Yuejing,&nbsp;Xiaoming Yang","doi":"10.1016/j.synthmet.2024.117821","DOIUrl":"10.1016/j.synthmet.2024.117821","url":null,"abstract":"<div><div>We report a green and scalable one-pot synthesis of raspberry-like hollow carbon spheres (HCSs) as high-performance cathode materials for zinc-ion hybrid supercapacitors (ZIHSCs). Utilizing poly(methyl methacrylate)@polypyrrole (PMMA@PPy) core-shell nanoparticles as precursors and sodium carbonate (Na₂CO₃) as both a barrier and activator, the resulting HCSs exhibit a hierarchical pore structure, a high surface area of 1883 m²/g, and significant oxygen (6.9 atom%) and nitrogen (1.7 atom%) doping. These features enable exceptional electrochemical performance, with a specific capacitance of 257 F/g at 1 A/g in a 6 M KOH electrolyte and remarkable energy density of 125 Wh/kg at a power density of 160 W/kg in ZIHSCs with a 2 M Zn(CF₃SO₃)₂ electrolyte. Moreover, the HCSs exhibit outstanding cycling stability, retaining 92.6 % of their initial capacitance after 5000 cycles at 5 A/g. This study highlights the potential of environmentally friendly porous carbon materials as promising candidates for advanced electrochemical energy storage applications.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"311 ","pages":"Article 117821"},"PeriodicalIF":4.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular design and synthesis of narrow-bandgap poly(thienylenevinylene)s via Co‐catalyzed hydroarylation polyaddition","authors":"Ryota Iwamori ,&nbsp;Kenta Miyata ,&nbsp;Junpei Kuwabara ,&nbsp;Takeshi Yasuda ,&nbsp;Takaki Kanbara","doi":"10.1016/j.synthmet.2024.117817","DOIUrl":"10.1016/j.synthmet.2024.117817","url":null,"abstract":"<div><div>Donor–acceptor conjugated polymers have been designed and synthesized to develop high-performance organic semiconductors. In this study, the site- and regioselective synthesis of narrow-bandgap poly(thienylenevinylene)s (PTVs) is demonstrated via Co-catalyzed hydroarylation polyaddition of 4-amidethiophene derivatives. The hydroarylation polyaddition of four types of thiophene-based aromatic monomers with 3,6-bis(5-ethynylthiophene-2-yl)-2,5-dialkyl-pyrrolo[3,4-<em>c</em>]pyrrole-1,4-dione yields the corresponding PTVs and does not produce byproducts from the monomers. The high planarity of the thienylenevinylene backbone extends the effective conjugation lengths, thereby narrowing the optical bandgap of the PTVs. Furthermore, the lowest unoccupied molecular orbital energy levels are deepened because of the introduction of electron-accepting building blocks, as measured by performing low-energy inverse photoelectron spectroscopy (LEIPS). The obtained PTV has a narrow band gap and a deep LUMO energy level. The properties are appropriate for the non-fullerene acceptor for organic photovoltaics, serving as an n-type semiconducting material.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"311 ","pages":"Article 117817"},"PeriodicalIF":4.0,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}