Electronic Materials Letters最新文献

{"title":"Effect of Co2+ Doping on Electrochemical Properties of Nickel Metal Tungstate (NiWO4) Positive Material","authors":"Jing Tang,&nbsp;Hui Xu,&nbsp;Yong Chen,&nbsp;Yuanqiang Zhu","doi":"10.1007/s13391-024-00493-0","DOIUrl":"10.1007/s13391-024-00493-0","url":null,"abstract":"<div><p>Currently, transition metal tungstates are emerging as electroactive materials for supercapacitors due to their excellent electrical conductivity and electrochemical properties. Small amounts of transition metal ions doping can affect the physical and electrical properties of transition metal tungstates. In this study, Co ion-doped NiWO₄ amorphous composites (CNWO) were synthesized using a simple and effective hydrothermal method and utilized as the cathode material for supercapacitors. The structure and electrochemical properties of NiWO₄ and CNWO composites were investigated using various testing techniques. Specifically, when the cobalt ion doping amount is 10%, the corresponding CNWO-10 electrode material exhibits a specific capacitance of 804 F g⁻¹ at 1 A g⁻¹, and at a current density of 10 A g⁻¹, the capacitance retention rate reaches 66.7%, demonstrating good rate performance. Additionally, an asymmetric supercapacitor device was constructed using CNWO-10 and activated carbon (AC) as positive and negative materials, respectively. Which could cycle reversibly under a potential window of 2.1 V. The device demonstrates a maximum specific capacitance of 76.5 F g⁻¹ at 0.5 A g⁻¹, and a high energy density of 47 Wh kg⁻¹ at a power density of 527 W kg⁻¹. Furthermore, 96% capacitance cycling stability is maintained after 5500 cycles at a trapezoidal current density. Moreover, the electrical conductivities of NiWO₄ and CNWO-10 samples are 9.01 × 10^–8 S m⁻¹ and 8.93 × 10^–6 S m⁻¹, attributed to the Co ion-doping that can reduce the gap width of the forbidden band to enhance conductivity. These results suggest that CNWO composites can serve as promising high-capacity electrode materials for high-performance supercapacitors in alkaline electrolytes.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"20 4","pages":"459 - 473"},"PeriodicalIF":2.1,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140975608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Novel Sensor for the Detection of n-Butanol Based on CoMn2O4 Nanoparticles","authors":"Juan Pablo Morán-Lázaro,&nbsp;Maykel Courel-Piedrahita,&nbsp;Alex Guillén-Bonilla,&nbsp;Florentino López-Urías,&nbsp;Héctor Guillén-Bonilla,&nbsp;Víctor Manuel Soto-García,&nbsp;Aldo Palafox-Corona,&nbsp;David Alberto Hernández-Poot","doi":"10.1007/s13391-024-00498-9","DOIUrl":"10.1007/s13391-024-00498-9","url":null,"abstract":"<div><p>In this paper, we studied the alcohol-sensing properties of CoMn₂O₄ nanoparticles for the first time. The CoMn₂O₄ nanoparticles were prepared via a simple microwave-assisted colloidal method using cobalt nitrate, manganese nitrate, dioctyl sulfosuccinate sodium salt, and ethylene glycol as a solvent. Various techniques were used to characterize the structural, morphological, and optical properties of CoMn₂O₄. The crystal structure of CoMn₂O₄ was found after calcination at a temperature of 400 °C. The Raman spectrum showed seven vibrational bands, while the optical absorption spectrum showed three bands, confirming the spinel CoMn₂O₄. Morphological analysis revealed that the porous microstructure of CoMn₂O₄ was composed of nanoparticles with a size distribution of 16 to 58 nm. Gas sensors were fabricated with the CoMn₂O₄ powders calcined at 400 °C using the brush-coating method, and experimental results showed that CoMn₂O₄ nanoparticles were more sensitive to <i>n</i>-butanol than isopropanol and ethanol at an operating temperature of 185 °C. The CoMn₂O₄ sensor showed a response of 6.6 at 50 ppm <i>n</i>-butanol with good stability, reproducibility, and repeatability. The present article provides a new sensing material that could be used as an <i>n</i>-butanol sensor with significant benefits for human health.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"20 5","pages":"610 - 620"},"PeriodicalIF":2.1,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140938205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two-Dimensional Leafy Fe/N-Doped Carbon Nanomaterials Derived from Vitamin C-Modified ZIF-L for Efficient Oxygen Reduction Reaction","authors":"Yating Zhang,&nbsp;Xiaobo Wang,&nbsp;Meng Chen,&nbsp;Pei He,&nbsp;Zhenghan Kong","doi":"10.1007/s13391-024-00496-x","DOIUrl":"10.1007/s13391-024-00496-x","url":null,"abstract":"<div><p>Oxygen reduction reaction (ORR) is an important half-reaction in various energy devices such as fuel cells. Here, 2D dendritic Fe/N co-doped carbon-based nanosheet composites (L-Fe-CNT@NCS-900) were obtained by high-temperature calcination using ZIF-L generated in the aqueous phase as a precursor and Vitamin C as a modifier. It is found that the catalysts calcined at 900℃ possessed the large specific surface area and the pore size distribution graphs showed a narrow micropore size distribution centered at about 1.8 nm. Furthermore, the Fe-N-C species was detected, which further improved the ORR performance as an active center. Thus, the L-Fe-CNT@NCS-900 calcined at 900 °C achieved the best ORR performance with a half-wave potential (E_1/2) of 0.85 V, and the hydrogen peroxide yield is only about 4% during the ORR process. Meanwhile, L-Fe-CNT@NCS-900 exhibited outstanding methanol resistance. This work proposes a new strategy for constructing an efficient electrocatalysts for oxygen reduction reaction.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"20 5","pages":"592 - 602"},"PeriodicalIF":2.1,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140938206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tl3PbI5 Nanocrystals for Ultraviolet Photovoltaics","authors":"Wooyeon Kim,&nbsp;Bonkee Koo,&nbsp;Jaeyeon Kim,&nbsp;In Choi,&nbsp;Seongyeon Hwang,&nbsp;Min Jae Ko","doi":"10.1007/s13391-024-00499-8","DOIUrl":"10.1007/s13391-024-00499-8","url":null,"abstract":"<div><p>Tl₃PbI₅ exhibits a bandgap energy suitable for absorbing visible and ultraviolet spectra along with a high absorption capability, rendering it a promising candidate for a broader range of solar energy applications. However, its applicability as a light absorber in solar cells is yet to be experimentally confirmed. In this study, we systemically investigate the synthesis process and the crystallographic and chemical properties of Tl₃PbI₅ nanocrystals. These results enable the optimization of Tl₃PbI₅ nanocrystals for use as a light absorber. In addition, a solid-state ligand exchange method employing methyl acetate (MeOAc) is introduced to construct a Tl₃PbI₅ absorption layer for photovoltaic applications. This method facilitates the preparation of multilayer thin films with precise thickness control. The optimally designed Tl₃PbI₅-based solar cell achieves a power conversion efficiency (<i>PCE</i>) of 0.20%. Furthermore, the device retains over 90% of its <i>PCE</i> after 2000 h at 25 °C and 60% relative humidity, indicating the potential of Tl₃PbI₅-based photovoltaics for reliable solar energy harvesting.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"20 5","pages":"584 - 591"},"PeriodicalIF":2.1,"publicationDate":"2024-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140884163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phenyltrimethylammonium as an Interlayer Spacer for Stable Formamidinium-Based Quasi-2D Perovskite Solar Cells","authors":"Bumjin Gil,&nbsp;Jinhyun Kim,&nbsp;Byungwoo Park","doi":"10.1007/s13391-024-00497-w","DOIUrl":"10.1007/s13391-024-00497-w","url":null,"abstract":"<div><p>Quasi-2D perovskite materials possess great potential in improving the stability of perovskite solar cells due to their superior chemical and structural stableness compared to 3D counterparts. Here, commonly-used 3D formamidinum lead iodide (FAPbI₃) perovskite is alloyed by addition of quaternary cation phenyltrimethylammonium (PTMA) up to 33% (<i>n</i> = 5), which forms quasi-2D perovskite phase that acts beneficial to charge transport and stability. Since the detailed structural analyses regarding this quaternary ammonium salt is still lacking, we attempt to provide how the presence of 2D perovskite affects the crystal structure based on x-ray diffraction techniques. It is shown that PTMA cations directs FAPbI₃ to have textured orientation and reduced strains. This led to enhanced extraction of photogenerated carriers and reduced defects, making it promising material for solar cell applications. The champion device remains stable under 60 °C or 1 sun for 700 h, demonstrating its potential for optoelectronic devices requiring long-term stability.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"20 6","pages":"791 - 798"},"PeriodicalIF":2.1,"publicationDate":"2024-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140799574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnetite–Polyaniline Nanocomposite for Non-Volatile Memory and Neuromorphic Computing Applications","authors":"Ishika U. Shah,&nbsp;Snehal L. Patil,&nbsp;Sushilkumar A. Jadhav,&nbsp;Tukaram D. Dongale,&nbsp;Rajanish K. Kamat","doi":"10.1007/s13391-024-00495-y","DOIUrl":"10.1007/s13391-024-00495-y","url":null,"abstract":"<div><p>Conducting polymers are proving to be useful for   construction of resistive switching devices. This work reports the fabrication of a resistive switching device using Magnetite-Polyaniline (Fe₃O₄-PANI) nanocomposite. The device showed good non-volatile memory properties and can mimic neuromorphic synaptic behavior. Initially, Fe₃O₄ nanoparticles were synthesized using the co-precipitation method and PANI by oxidative polymerization and their nanocomposites of different compositions were prepared and fully characterized. The 10% Fe₃O₄-PANI-based RS device outperforms all others in terms of I–V switching performance. Furthermore, the optimized device (10% Fe₃O₄-PANI) has tuneable I–V characteristics. The device demonstrated excellent analog switching at ± 1.5 V and digital switching at ± 2.5 V. The memristive behavior of the Ag/10% Fe₃O₄-PANI/FTO device was confirmed by the pinched hysteresis loop in the I–V curves at different voltages, as well as the double-valued charged-flux characteristics. The device has good cycle-to-cycle reliability for switching voltages and switching currents, as demonstrated by the Weibull distribution and other statistical measures. Moreover, the device can retain memory states up to 6 × 10³ s and shows a switching stability of 2 × 10⁴ cycles. The device also showed linear potentiation and depression characteristics and mimicked excitatory post-synaptic current (EPSC) and paired-pulse facilitation (PPF) index properties similar to its biological counterpart. According to the charge transport model fitting results, the Ohmic and Child’s square laws dominated in both analog and digital switching processes, and RS occurs due to the filamentary process.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"20 4","pages":"381 - 392"},"PeriodicalIF":2.1,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140609086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optoelectronic Synapse Behaviors of HfS2 Grown via Molten Salt Flux Method","authors":"Mi Ji Kwon,&nbsp;Nguyen Vu Binh,&nbsp;Su-yeon Cho,&nbsp;Soo Bin Shim,&nbsp;So Hyun Ryu,&nbsp;Yong Jae Jung,&nbsp;Woo Hyun Nam,&nbsp;Jung Young Cho,&nbsp;Jun Hong Park","doi":"10.1007/s13391-024-00494-z","DOIUrl":"10.1007/s13391-024-00494-z","url":null,"abstract":"<div><p>Layered two-dimensional materials are promising candidates for next-generation semiconductor platforms owing to their atomically thin bodies, and it is crucial to develop a method for their large-scale synthesis for integrating these materials into the fabrication process. Here, we report the synthesis of a centimeter-scale HfS₂ ingot using the molten salt flux method (MSFM). The structure, crystallinity, and uniformity of the synthesized HfS₂ sample were verified using X-ray diffraction and Raman spectroscopy. The chemical properties were investigated using X-ray photoelectron spectroscopy. A HfS₂ synaptic field effect transistor (FET) was fabricated to confirm its electrical uniformity and semiconducting nature, with an average mobility of 10.6 cm² V^-1 s^-1. The synaptic plasticity of the HfS₂ synaptic FET was investigated by applying light pulses (405 nm) in different modulation configurations. Paired-pulse facilitation was achieved by applying a continuous light pulse with a negative gate bias voltage. The modulation of synaptic weight was demonstrated under different stimulation conditions, which emulates the human brain. Furthermore, the linearity of the HfS₂ synaptic device was optimized based on the frequency of the pulses to enhance learning accuracy. The approach reported here encourages the large-scaled production of transition metal dichalcogenides (TMDs) for use in artificial synaptic transistors.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"20 5","pages":"559 - 570"},"PeriodicalIF":2.1,"publicationDate":"2024-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140588054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Co-W and Co-Fe-W Diffusion Barriers on the Reliability of the Solder/Cu Interface during Reflow Conditions","authors":"Yuexiao Liu,&nbsp;Chongyang Li,&nbsp;Peixin Chen,&nbsp;Jinyang Liu,&nbsp;Anmin Hu,&nbsp;Ming Li","doi":"10.1007/s13391-024-00491-2","DOIUrl":"10.1007/s13391-024-00491-2","url":null,"abstract":"<div><p>Efficient diffusion barriers are necessary to prevent the formation of copper-tin intermetallic compounds (IMCs) in advanced packaging for Sn/Cu micro-bumps. This study investigated the interfacial properties of solder and Ni, Co-9W, Co-20W, Co-20Fe-10W, and Co-36Fe-17W barriers and determined the thickness of IMCs formed between Sn and these barriers after up to 15 reflows. Among the five barriers, Co-36Fe-17W proved to be the most effective in inhibiting the reaction of liquid Sn solder. At the Sn/Co-W interface, CoSn₃ IMC was formed, while at the Sn/Co-Fe-W interface, CoSn₃ IMC and FeSn₂ IMC were observed. The contact angles of these layers were measured and found to be 18°, 22°, 25°, 29°, and 27°, respectively. The results showed that an increase in W content in Co-W led to an increase in the contact angle, while the intrinsic wettability of Co-Fe-W decreased with an increase in Fe content. The shear strengths of the five joints were 27 MPa, 31 MPa, 25 MPa, 25 MPa, and 26 MPa, respectively, with different fracture modes observed. The Co-Fe-W-Sn layer was partially peeling from the diffusion barriers in SAC305/Co-20Fe-10W, and the fracture surfaces exhibited an irregular and rough state, which was attributed to the increasing Fe and W contents. These findings offer valuable insights for enhancing the reliability of electronic packages.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"20 5","pages":"517 - 524"},"PeriodicalIF":2.1,"publicationDate":"2024-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140588270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Self-Healing of Kirkendall Voids and IMC Growth in the Interfacial Reaction of Novel Ni/Cu bi-layer Barrier and Solder","authors":"Haokun Li,&nbsp;Chongyang Li,&nbsp;Peixin Chen,&nbsp;Rui Xi,&nbsp;Feifei Li,&nbsp;Huiqin Ling,&nbsp;Ming Li","doi":"10.1007/s13391-024-00492-1","DOIUrl":"10.1007/s13391-024-00492-1","url":null,"abstract":"<div><p>Single Ni layer is often inserted as diffusion barrier between Cu pillar and Sn-based solder to avoid excessive growth of brittle intermetallic compounds (IMCs) and consequent Kirkendall voids (KVs) in microbumps. However, with shrinking size of microbumps, Ni layer cannot maintain the inhibition performance as its thickness is reduced as well. In this work, Ni/Cu bi-layer barrier was employed at Cu-Sn interface, which was expected to reduce diffusion by rapidly generated Cu-Sn IMC retarding the diffusion of Ni. IMC growth behavior and interfacial reaction during isothermal aging were investigated. The self-healing phenomenon of KVs was detected during aging at 150 °C . It’s attributed to the transformation from Cu₃Sn to Cu₆Sn₅. The novel barrier exhibited excellent inhibition property compared with single Ni layer with slower IMC growth rate and less Cu substrate diffusion. Moreover, during 170 °C aging test, the Ni/Cu bi-layer barrier showed no sign of depletion until 600 h, while the single Ni barrier was completely depleted after 144 h. Such excellent inhibition property is beneficial to the future application of ultra-thin barrier layer in microbumps.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"20 5","pages":"509 - 516"},"PeriodicalIF":2.1,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140588053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploration about the Electrolyte System of Li-ion Batteries for the Wide Temperature Range Operation","authors":"Ok-Jeong Kim, Yeong-Hyun Cho, Jung-Jin Kang, Young-Sang Yu, Chunjoong Kim, Gi-Yeong Yun","doi":"10.1007/s13391-024-00488-x","DOIUrl":"https://doi.org/10.1007/s13391-024-00488-x","url":null,"abstract":"<p>Lithium-ion batteries (LIBs) have garnered great attention owing to their high specific energy and power compared with other batteries. Currently, the use of LIBs is expanded to the power source of mid- or large-sized devices such as electric vehicles, energy storage devices, and so on. For the stable operation of such devices, LIBs should deliver their battery performance under the daily-life temperature, <i>i</i>.<i>e</i>., from − 20 to 60 °C. In so far as, direct modification of the electrolyte system is considered the most effective among various strategies. Herein, we investigated various carbonate-based electrolyte systems for LIBs. The effect of the compositions and additives of the electrolyte on the battery performance was scrutinized. Therefore, we could provide an understanding of the electrolyte design rule, which enables LIBs to work under the desired temperature.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":536,"journal":{"name":"Electronic Materials Letters","volume":"5 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140325377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}