Applied Physics Letters最新文献_第3页

Acoustic resonators above 100 GHz 100 GHz以上的声学谐振器

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-07-09 DOI: 10.1063/5.0275691

Jack Kramer, Bryan T. Bosworth, Lezli Matto, Nicholas R. Jungwirth, Omar Barrera, Florian Bergmann, Sinwoo Cho, Vakhtang Chulukhadze, Mark Goorsky, Nathan D. Orloff, Ruochen Lu

{"title":"Acoustic resonators above 100 GHz","authors":"Jack Kramer, Bryan T. Bosworth, Lezli Matto, Nicholas R. Jungwirth, Omar Barrera, Florian Bergmann, Sinwoo Cho, Vakhtang Chulukhadze, Mark Goorsky, Nathan D. Orloff, Ruochen Lu","doi":"10.1063/5.0275691","DOIUrl":"https://doi.org/10.1063/5.0275691","url":null,"abstract":"Piezoelectric resonators are a common building block for signal processing because of their miniature size, low insertion loss, and high quality factor. As consumer electronics push to millimeter wave frequencies, designers must increase the operating frequency of the resonator. The current state-of-the-art approach to increase the operating frequency is to decrease the thickness of the piezoelectric film to shorten the acoustic wavelength or to use higher order modes. Unfortunately, maintaining high quality factors typically requires thicker piezoelectric layers. Thinner individual layers suffer from higher defect densities and increased relative losses from surface related damping, which degrade the electromechanical coupling and quality factor. While acoustic high order modes can also increase operating frequency, the electromechanical coupling rapidly decreases with increasing mode number. Here, we overcome these limitations by utilizing a piezoelectric stack of three layers of lithium niobate with alternating crystallographic orientations to preferentially support higher order modes and thereby enhance the electromechanical coupling without degrading the quality factor. Our approach improves the figure of merit of millimeter wave acoustic resonators by roughly an order of magnitude greater compared to state-of-the-art piezoelectric resonators above 60 GHz. This concept of alternating crystallographic orientations facilitates a path to develop millimeter wave resonators with high figures of merit, low insertion loss, and miniature footprints, enabling applications in millimeter wave signal processing and computing.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":"109 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144586404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Nonequilibrium-controlled charge-carrier transitions in SnSe single crystals SnSe单晶中非平衡控制的载流子跃迁

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-07-09 DOI: 10.1063/5.0274512

Yunfan Yang, Yadong Han, Junhong Yu, Rongxiao Du, Qingshuo Liu, Hang Zhang, Jianbo Hu

{"title":"Nonequilibrium-controlled charge-carrier transitions in SnSe single crystals","authors":"Yunfan Yang, Yadong Han, Junhong Yu, Rongxiao Du, Qingshuo Liu, Hang Zhang, Jianbo Hu","doi":"10.1063/5.0274512","DOIUrl":"https://doi.org/10.1063/5.0274512","url":null,"abstract":"Single-crystal tin selenide (SnSe) is a promising thermoelectric material with the current record figure of merit at 923 K. To improve the thermoelectric performance of SnSe at ambient conditions, manipulating the charge-carrier transition process has attracted great interest recently. Here, different from static strategies of carrier doping or band engineering, we propose and report a nonequilibrium and complete switching of charge-carrier transitions in SnSe between the interband process and the intraband process. In a broad range of 420–520 nm, the transient absorption (TA) spectroscopy confirms the intraband/interband transition switching with an ultrafast picosecond optical modulation speed and a near-unity degree of completeness, achieved solely by changing the probe pulse polarization. The theoretical analysis of transition dipole moments and transition selection rules links this nonequilibrium-controlled carrier transition with the anisotropic electronic structure and glide-mirror symmetry of SnSe. These results offer insights and raise attractive possibilities to enhance the power factor by exploiting the dynamical electronic anisotropy of thermoelectric materials.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":"34 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144593837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Dilute bismuth incorporated InGaBiAs photodetectors for extended short-wave infrared detection 稀铋结合InGaBiAs光电探测器扩展短波红外探测

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-07-08 DOI: 10.1063/5.0273578

Md Toriqul Islam, Mrudul S. Parasnis, Nuha Ahmed-Babikir, James Bork, Abhilasha Kamboj, Sheikh Alimur Razi, Weipeng Wu, Lars Gundlach, Joshua M. O. Zide, Jamie D. Phillips

{"title":"Dilute bismuth incorporated InGaBiAs photodetectors for extended short-wave infrared detection","authors":"Md Toriqul Islam, Mrudul S. Parasnis, Nuha Ahmed-Babikir, James Bork, Abhilasha Kamboj, Sheikh Alimur Razi, Weipeng Wu, Lars Gundlach, Joshua M. O. Zide, Jamie D. Phillips","doi":"10.1063/5.0273578","DOIUrl":"https://doi.org/10.1063/5.0273578","url":null,"abstract":"Dilute bismuth (Bi) incorporated InGaBiAs is a promising material for an extended range of short-wave infrared (e-SWIR, 1.7–2.5 μm wavelength) detection. The InGaBiAs is a highly mismatched semiconductor alloy, where small concentrations of Bi incorporation alter the electronic band structure due to the valence band anti-crossing interaction between Bi states and host InGaAs material, resulting in a decrease in the bandgap energy. In this work, photodetectors based on InGaBiAs alloys lattice matched to InP demonstrate an extension of the cutoff wavelength beyond 2 μm. Dark current density, minority carrier lifetime, and responsivity strongly depend on group-V arsenic overpressure during epitaxial growth. Photodetectors grown under high arsenic flux pressure show low dark current values at room temperature (1.0 × 10−3 A/cm2 at 100 mV reverse bias), an order of magnitude lower than stoichiometric and low As flux grown devices, and correspondingly higher lifetime and responsivity. Two distinct activation energies were identified for each growth condition based on temperature-dependent dark current analysis, with trap-assisted generation-recombination in the depletion region and shallow defect recombination as the dark current-limiting factors in all devices.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":"21 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144577702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Enhancement of high-temperature capacitive energy storage performance in all-polymer dielectric composites via microphase separation 微相分离增强全聚合物介电复合材料高温电容储能性能

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-07-08 DOI: 10.1063/5.0280505

Jinbao Chen, Ting Li, Ziyu Lv, Yongbiao Zhai, Wugang Liao, Qiyan Zhang

{"title":"Enhancement of high-temperature capacitive energy storage performance in all-polymer dielectric composites via microphase separation","authors":"Jinbao Chen, Ting Li, Ziyu Lv, Yongbiao Zhai, Wugang Liao, Qiyan Zhang","doi":"10.1063/5.0280505","DOIUrl":"https://doi.org/10.1063/5.0280505","url":null,"abstract":"Polymer dielectric capacitors play a crucial role in modern electronics and power systems owing to their exceptional power density, high breakdown strength, excellent processability, and cost-effectiveness. Nevertheless, their practical deployment in harsh operating environments, particularly in electric vehicles and aerospace power electronics, remains challenging due to the inherent thermal instability of conventional polymer dielectrics. Herein, we report an all-polymer dielectric composite (APDC) material fabricated from partially miscible polyetherimide (PEI)/polyamide-imide (PAI) blends that exhibits significantly improved high-temperature capacitive energy storage properties, including breakdown strength (Eb), discharge energy density (Ud), and charge–discharge efficiency (η). The performance enhancement stems from the self-assembled nanoscale interfacial architectures comprising uniformly dispersed PAI domains within the PEI matrix, coupled with the intrinsic energy band structure mismatch between PEI and PAI (notably in electron affinity). These structural characteristics effectively create deep charge traps, resulting in a substantial reduction of leakage current density by more than one order of magnitude compared to pristine PEI under elevated temperatures and high-electric fields. Notably, the developed APDC materials feature a straightforward, efficient, and cost-effective fabrication process, rendering them highly promising for scalable production of high-performance dielectric films for high-temperature capacitors.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":"42 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144577773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Effects of defects in graphene on molecular beam epitaxy of CdTe on graphene/Ge 石墨烯缺陷对CdTe在石墨烯/锗上分子束外延的影响

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-07-07 DOI: 10.1063/5.0281027

Yanhui Zhang, Haitao Jiang, Zaihong Yang, Liuyan Fan, Ziteng Zhang, Can Zhou, Yajie Wang, Changlin Zheng, Xiaohao Zhou, Pingping Chen

引用次数: 0

Noninvasive in vivo imaging of brain specific absorption rate using thermoacoustic tomography 利用热声断层成像技术进行脑特异性吸收率的无创体内成像

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-07-07 DOI: 10.1063/5.0279815

Yu Wang, Famin Huang, Yichao Fu, Bohan Zhang, Huan Qin

{"title":"Noninvasive in vivo imaging of brain specific absorption rate using thermoacoustic tomography","authors":"Yu Wang, Famin Huang, Yichao Fu, Bohan Zhang, Huan Qin","doi":"10.1063/5.0279815","DOIUrl":"https://doi.org/10.1063/5.0279815","url":null,"abstract":"Electromagnetic field-based diagnostic and therapeutic techniques are gradually becoming widespread in brain disease applications, but their associated safety assessment techniques still have limitations. Specific absorption rate (SAR), as a key parameter to measure the degree of tissue absorption of electromagnetic energy, and its accurate measurement is of great significance to guarantee the safety of electromagnetic diagnostic techniques. However, current dosimetry assessment system and magnetic resonance imaging (MRI) methods, which reflect SAR by measuring temperature rise, both face challenges in realizing noninvasive, accurate, and in vivo SAR mapping. In this work, a three-dimensional (3D) thermoacoustic imaging (3D-TAT) technique is proposed to perform noninvasive SAR measurements of deep tissues with hundred-micron accuracy by using passive ultrasound as an information carrier of the temperature rise of the tissues after absorbing the electromagnetic wave energy. The accuracy of SAR measurements with 3D-TAT is validated in a water pipe model, and its potential application in complex biological tissues is demonstrated in a mouse brain model. 3D-TAT provides a technological path for safety monitoring of electromagnetic techniques such as high-field strength magnetic resonance imaging (MRI) and microwave thermotherapy, which has a wide range of clinical and scientific applications.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":"692 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144577777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Magnetic and stackable flexible photonic crystal perfect absorbers 磁性和可堆叠的柔性光子晶体是完美的吸收材料

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-07-07 DOI: 10.1063/5.0267097

Wenjing Lv, Haoye Qin, Feng Wang, Han Zhang, Jing Guo, Jidong Du, Hongsheng Sun, Qinghua Song, Bo Li

{"title":"Magnetic and stackable flexible photonic crystal perfect absorbers","authors":"Wenjing Lv, Haoye Qin, Feng Wang, Han Zhang, Jing Guo, Jidong Du, Hongsheng Sun, Qinghua Song, Bo Li","doi":"10.1063/5.0267097","DOIUrl":"https://doi.org/10.1063/5.0267097","url":null,"abstract":"The detrimental effects of electromagnetic pollution on wireless communication and potential health risks necessitate the development of efficient mitigation strategies. However, traditional absorbing materials and existing metamaterial absorbers face limitations in terms of cost, complexity, and tunability. In this study, we propose an improved design for a highly efficient and tunable metamaterial absorber called a photonic crystal (PhC) absorber. It involves a membrane with periodic holes in a square pattern, with carbon iron powder as the absorbent material and silicone as the matrix. Radar cross section measurements confirm the PhC absorber's performance, with maximum absorption of 53 dB and a considerably large effective bandwidth. The PhC absorber exhibits magnetic tunability, and a magnetic field shifts the maximum absorption position to higher frequencies and widens the effective bandwidth. Increasing the number of absorber layers in the stackable PhC configuration lowers the resonant frequency and widens the relative bandwidth. With its superior absorption capability, tunability, stackability, flexibility, and feasible fabrication process, the PhC absorber demonstrates considerable potential for various absorbing meta-devices.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":"9 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144577852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Optical encoding and multiplexing based regional single-pixel imaging via TD-SCDMA 基于TD-SCDMA光编码和多路复用的区域单像素成像

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-07-07 DOI: 10.1063/5.0257845

Ying Li, Yu Kou, Yue Li, Jialin Zhang, Dan Zhao, Sheng Yuan, Zhijian Zhang, Xin Zhou

{"title":"Optical encoding and multiplexing based regional single-pixel imaging via TD-SCDMA","authors":"Ying Li, Yu Kou, Yue Li, Jialin Zhang, Dan Zhao, Sheng Yuan, Zhijian Zhang, Xin Zhou","doi":"10.1063/5.0257845","DOIUrl":"https://doi.org/10.1063/5.0257845","url":null,"abstract":"Different from traditional imaging methods that rely on plane array detectors, single-pixel imaging (SPI) utilizes a single detector without spatial resolution to acquire images. However, achieving high-resolution reconstruction with SPI typically requires a large number of measurements, which limits the development of SPI. To achieve a balance between high resolution and frame rate, an SPI method based on optical encoding and multiplexing is proposed and demonstrated. In this method, the beam modulated by illumination patterns is subjected to orthogonal space-time encoding to achieve the redistribution of sampling density across different sub-regions of the target. After optical multiplexing, the combined light intensity is collected by a single-pixel detector and decoded to reconstruct each sub-region. Consequently, sub-regions assigned higher sampling densities exhibit improved detail resolution, more closely matching human visual perception compared to those with lower sampling. This work overcomes the limitation of traditional SPI approaches that impose uniform resolution across the entire field of view. With the introduction of space-time encoding, sampling density can be flexibly allocated among various regions. This enables the reconstruction of large-scale scenes at a low overall sampling rate while still achieving higher resolution in selected regions of interest. Moreover, the proposed method can be integrated with various reconstruction algorithms to further reduce computational costs and acquisition time.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":"21 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144577780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Two-dimensional WTe2/Cr3Te4 heterostructures with high current-induced magnetization switching ratio 具有高电流感应磁化开关比的二维WTe2/Cr3Te4异质结构

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-07-07 DOI: 10.1063/5.0275035

Kun He, Bailing Li, Sumei Wu, Chen Yi, Yingying Liu, Shaojun Liu, Di Wang, Ruixia Wu, Jia Li, Bo Li, Xidong Duan

{"title":"Two-dimensional WTe2/Cr3Te4 heterostructures with high current-induced magnetization switching ratio","authors":"Kun He, Bailing Li, Sumei Wu, Chen Yi, Yingying Liu, Shaojun Liu, Di Wang, Ruixia Wu, Jia Li, Bo Li, Xidong Duan","doi":"10.1063/5.0275035","DOIUrl":"https://doi.org/10.1063/5.0275035","url":null,"abstract":"Two-dimensional (2D) magnetic materials have emerged as a promising platform for spintronic devices due to their ability to form van der Waals heterostructures with high-quality interfaces, circumventing the lattice-matching constraints of conventional materials. However, the relatively low switching efficiency (&lt;60%) in spin–orbit torque (SOT) systems has limited the development of low-power spin devices based on 2D heterostructures. In this study, we synthesize 2D quasi-layered Cr3Te4 ferromagnets with strong perpendicular magnetic anisotropy via chemical vapor deposition method and investigate the SOT effect in WTe2/Cr3Te4 heterostructure through harmonic Hall measurements and current-induced magnetization switching. The heterostructure demonstrates a substantial damping-like effective field, reaching 800 Oe per 106 A cm−2 for spin-up and −480 Oe per 106 A cm−2 for spin-down configurations. Remarkably, current-induced magnetization reversal measurement reveals an unprecedented switching ratio of ∼90% with a low critical current density of 1.85 × 106 A cm−2, surpassing previously reported values in other 2D heterostructures. These findings not only deepen our understanding of efficient SOT switching mechanisms but also provide a critical step toward the realization of next-generation low-power spintronic devices.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":"103 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144568422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Ternary amorphous/crystalline NiMoB/Ni@Ti3C2 heterostructures with electronic modulation for high-performance alkaline hydrogen evolution catalysis 三元非晶/晶体NiMoB/Ni@Ti3C2异质结构与电子调制的高性能碱性析氢催化

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2025-07-07 DOI: 10.1063/5.0280071

Cheng Lin, Liang Yang, Yanling Cao, Man Jiang, Yanjing Zhang, Ting Yu, Yaohui Qu, Cailei Yuan, Manman Guo

{"title":"Ternary amorphous/crystalline NiMoB/Ni@Ti3C2 heterostructures with electronic modulation for high-performance alkaline hydrogen evolution catalysis","authors":"Cheng Lin, Liang Yang, Yanling Cao, Man Jiang, Yanjing Zhang, Ting Yu, Yaohui Qu, Cailei Yuan, Manman Guo","doi":"10.1063/5.0280071","DOIUrl":"https://doi.org/10.1063/5.0280071","url":null,"abstract":"Constructing multicomponent heterostructures with coexisting amorphous and crystalline phases offers a promising strategy to finely optimize electronic structures and thereby promote the hydrogen evolution reaction (HER) kinetics in alkaline media. Here, we design a ternary heterostructure consisting of amorphous/crystalline NiMoB/Ni anchored on Ti3C2 MXene (denoted as a-NiMoB/c-Ni@Ti3C2), which fully leverages synergistic electronic modulation at the heterointerfaces. This architecture significantly enhances active site exposure, improves charge transfer efficiency, and stabilizes the catalyst framework. As a result, the a-NiMoB/c-Ni@Ti3C2 catalyst achieves an impressive HER performance, requiring an overpotential of only 87.8 mV to deliver 10 mA cm−2 with a low Tafel slope of 40.3 mV dec−1 and excellent operational durability in 1 M KOH. Density functional theory calculations combined with photoelectron spectroscopy analysis reveal that interfacial electronic interactions between NiMoB/Ni and Ti3C2 critically drive the improved HER kinetics. This work offers a perspective for the rational design of high-efficiency ternary heterostructure electrocatalysts for alkaline hydrogen production.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":"149 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144568424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0