APL Materials最新文献_第9页

In situ electric-field control of ferromagnetic resonance in the low-loss organic-based ferrimagnet V[TCNE]x∼2 低损耗有机铁磁体 V[TCNE]x∼2 中铁磁共振的原位电场控制

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-05-14 DOI: 10.1063/5.0189565

Seth W. Kurfman, Andrew Franson, Piyush Shah, Yueguang Shi, Hil Fung Harry Cheung, Katherine E. Nygren, Mitchell Swyt, Kristen S. Buchanan, Gregory D. Fuchs, Michael E. Flatté, Gopalan Srinivasan, Michael Page, Ezekiel Johnston-Halperin

{"title":"In situ electric-field control of ferromagnetic resonance in the low-loss organic-based ferrimagnet V[TCNE]x∼2","authors":"Seth W. Kurfman, Andrew Franson, Piyush Shah, Yueguang Shi, Hil Fung Harry Cheung, Katherine E. Nygren, Mitchell Swyt, Kristen S. Buchanan, Gregory D. Fuchs, Michael E. Flatté, Gopalan Srinivasan, Michael Page, Ezekiel Johnston-Halperin","doi":"10.1063/5.0189565","DOIUrl":"https://doi.org/10.1063/5.0189565","url":null,"abstract":"We demonstrate indirect electric-field control of ferromagnetic resonance (FMR) in devices that integrate the low-loss, molecule-based, room-temperature ferrimagnet vanadium tetracyanoethylene (V[TCNE]x∼2) mechanically coupled to PMN-PT piezoelectric transducers. Upon straining the V[TCNE]x films, the FMR frequency is tuned by more than 6 times the resonant linewidth with no change in Gilbert damping for samples with α = 6.5 × 10−5. We show this tuning effect is due to a strain-dependent magnetic anisotropy in the films and find the magnetoelastic coefficient |λs| ∼ (1–4.4) ppm, backed by theoretical predictions from density-functional theory calculations and magnetoelastic theory. Noting the rapidly expanding application space for strain-tuned FMR, we define a new metric for magnetostrictive materials, magnetostrictive agility, given by the ratio of the magnetoelastic coefficient to the FMR linewidth. This agility allows for a direct comparison between magnetostrictive materials in terms of their comparative efficacy for magnetoelectric applications requiring ultra-low loss magnetic resonance modulated by strain. With this metric, we show V[TCNE]x is competitive with other magnetostrictive materials, including YIG and Terfenol-D. This combination of ultra-narrow linewidth and magnetostriction, in a system that can be directly integrated into functional devices without requiring heterogeneous integration in a thin film geometry, promises unprecedented functionality for electric-field tuned microwave devices ranging from low-power, compact filters and circulators to emerging applications in quantum information science and technology.","PeriodicalId":7985,"journal":{"name":"APL Materials","volume":"126 1","pages":""},"PeriodicalIF":6.1,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141062814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Small multimodal thermometry with detonation-created multi-color centers in detonation nanodiamond 在引爆纳米金刚石中利用引爆产生的多色中心进行小型多模式测温

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-05-10 DOI: 10.1063/5.0201154

Frederick T.-K. So, Nene Hariki, Masaya Nemoto, Alexander I. Shames, Ming Liu, Akihiko Tsurui, Taro Yoshikawa, Yuto Makino, Masanao Ohori, Masanori Fujiwara, Ernst David Herbschleb, Naoya Morioka, Izuru Ohki, Masahiro Shirakawa, Ryuji Igarashi, Masahiro Nishikawa, Norikazu Mizuochi

{"title":"Small multimodal thermometry with detonation-created multi-color centers in detonation nanodiamond","authors":"Frederick T.-K. So, Nene Hariki, Masaya Nemoto, Alexander I. Shames, Ming Liu, Akihiko Tsurui, Taro Yoshikawa, Yuto Makino, Masanao Ohori, Masanori Fujiwara, Ernst David Herbschleb, Naoya Morioka, Izuru Ohki, Masahiro Shirakawa, Ryuji Igarashi, Masahiro Nishikawa, Norikazu Mizuochi","doi":"10.1063/5.0201154","DOIUrl":"https://doi.org/10.1063/5.0201154","url":null,"abstract":"Detonation nanodiamond (DND) is the smallest class of diamond nanocrystal capable of hosting various color centers with a size akin to molecular pores. Their negatively charged nitrogen-vacancy center (NV−) is a versatile tool for sensing a wide range of physical and even chemical parameters at the nanoscale. The NV− is, therefore, attracting interest as the smallest quantum sensor in biological research. Nonetheless, recent NV− enhancement in DND has yet to yield sufficient fluorescence per particle, leading to efforts to incorporate other group-IV color centers into DND. An example is adding a silicon dopant to the explosive mixture to create negatively charged silicon-vacancy centers (SiV−). In this paper, we report on efficient observation (∼50% of randomly selected spots) of the characteristic optically detected magnetic resonance (ODMR) NV− signal in silicon-doped DND (Si-DND) subjected to boiling acid surface cleaning. The NV− concentration is estimated by continuous-wave electron spin resonance spectroscopy to be 0.35 ppm without the NV− enrichment process. A temperature sensitivity of 0.36K/Hz in an NV− ensemble inside an aggregate of Si-DND is achieved via the ODMR-based technique. Transmission electron microscopy survey reveals that the Si-DNDs core sizes are ∼11.2 nm, the smallest among the nanodiamond’s temperature sensitivity studies. Furthermore, temperature sensing using both SiV− (all-optical technique) and NV− (ODMR-based technique) in the same confocal volume is demonstrated, showing Si-DND’s multimodal temperature sensing capability. The results of the study thereby pave a path for multi-color and multimodal biosensors and for decoupling the detected electrical field and temperature effects on the NV− center.","PeriodicalId":7985,"journal":{"name":"APL Materials","volume":"1 1","pages":""},"PeriodicalIF":6.1,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140930664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Increasing terahertz spintronic emission with planar antennas 利用平面天线提高太赫兹自旋电子发射率

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-05-10 DOI: 10.1063/5.0200413

Matthias Pacé, Oleksandr Kovalenko, José Solano, Michel Hehn, Matthieu Bailleul, Mircea Vomir

引用次数: 0

Recent advances on two-dimensional material-based nanosystems for gene delivery 用于基因递送的二维材料纳米系统的最新进展

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-05-10 DOI: 10.1063/5.0209799

Mengjie Wang, Dan Li, Jiangtao Zhu, Junyu Liu, Yandong Yin, Yang Su, Chanyuan Jin, Juan Li, Can Yang Zhang

{"title":"Recent advances on two-dimensional material-based nanosystems for gene delivery","authors":"Mengjie Wang, Dan Li, Jiangtao Zhu, Junyu Liu, Yandong Yin, Yang Su, Chanyuan Jin, Juan Li, Can Yang Zhang","doi":"10.1063/5.0209799","DOIUrl":"https://doi.org/10.1063/5.0209799","url":null,"abstract":"Gene therapy has been extensively investigated and widely used in biomedical fields, such as cancer treatment. However, the most important issues for gene therapy are stability, targeting effect, transfection efficacy, and safety of gene formulation after administration, which seriously limit the further application of gene therapy in clinic. Therefore, gene delivery could be a promising strategy for overcoming these challenges. Two-dimensional (2D) materials are rising nanomaterials with excellent physical and chemical properties, including large specific surface area, easy modification, high conversion efficiency of light, and good biocompatibility, which have achieved promising applications as vehicles for gene delivery in the disease treatment. In this review, we first summarized the research progress of 2D material-based nanosystems for gene delivery to improve the therapeutic efficacy. We discussed that 2D material-based gene delivery nanosystems showed high therapeutic efficacy for many diseases treatment, especially cancer. Furthermore, we also proposed that surface modification of 2D materials might be a promising strategy to prepare multi-functional gene carriers for combination therapy with enhanced treatment efficacy. Finally, the future research progress, challenges, and prospects of 2D material-based nanosystems for gene therapy were discussed and concluded. Conclusively, we believe that 2D material-based nanosystems with good biocompatibility and high transfection efficiency would be potentially used in clinical settings to improve the therapeutic efficacy of gene therapy.","PeriodicalId":7985,"journal":{"name":"APL Materials","volume":"100 1","pages":""},"PeriodicalIF":6.1,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140930669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A silica nanobean carrier utilizing lysosomal and mitochondrial autophagy to kill ovarian cancer cell 利用溶酶体和线粒体自噬杀死卵巢癌细胞的二氧化硅纳米豆载体

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-05-10 DOI: 10.1063/5.0210252

Shi Tang, Qing Liu, Mingcheng Song, Xiangshuai Li, Degang Ji, Ying-Wei Yang, Huimei Yu

{"title":"A silica nanobean carrier utilizing lysosomal and mitochondrial autophagy to kill ovarian cancer cell","authors":"Shi Tang, Qing Liu, Mingcheng Song, Xiangshuai Li, Degang Ji, Ying-Wei Yang, Huimei Yu","doi":"10.1063/5.0210252","DOIUrl":"https://doi.org/10.1063/5.0210252","url":null,"abstract":"The development of responsive and smart drug nanocarriers that defeat the tumor microenvironment that resists cancer therapy has attracted considerable attention in recent decades. Upgrades are sought to effectively increase the therapeutic efficacy of chemotherapy drugs and reduce damage to normal tissues. In this study, a new type of silica nano-particle carrier, dual-functionalized mesoporous silica nanobeans (DF-MSNB), is used to encapsulate the drug, doxorubicin (DOX), to form the DOX@DF-MSNB complex. The complex simultaneously releases drugs and tracks drug uptake by cells after the environmentally triggered release of the encapsulated drug and fluorophore. Upon sensing the high GSH level and low pH in the tumor microenvironment, the disulfide bond breaks in the linker between the drug and the carrier. An attached fluorescent group is activated, and the DOX drug is released from the carrier. Our results show that DOX@DF-MSNB co-localizes with mitochondria and lysosomes in A2780 cells, enabling DOX to subvert the cells’ mitochondrial function and activate macrophage and mitochondrial autophagy. The application of a mitochondrial autophagy inhibitor confirms that DOX@DF-MSNB inhibits tumor development by activating mitochondrial autophagy.","PeriodicalId":7985,"journal":{"name":"APL Materials","volume":"156 1","pages":""},"PeriodicalIF":6.1,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140930441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural, optical, and electrical characterization of TiO2-doped yttria-stabilized zirconia electrolytes grown by atomic layer deposition 通过原子层沉积法生长的掺杂 TiO2 的钇稳定氧化锆电解质的结构、光学和电学特征

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-05-10 DOI: 10.1063/5.0205375

Jorge Luis Vazquez, Amin Bahrami, Carolina Bohórquez, Eduardo Blanco, Manuel Dominguez, Gerardo Soto, Kornelius Nielsch, Hugo Tiznado

{"title":"Structural, optical, and electrical characterization of TiO2-doped yttria-stabilized zirconia electrolytes grown by atomic layer deposition","authors":"Jorge Luis Vazquez, Amin Bahrami, Carolina Bohórquez, Eduardo Blanco, Manuel Dominguez, Gerardo Soto, Kornelius Nielsch, Hugo Tiznado","doi":"10.1063/5.0205375","DOIUrl":"https://doi.org/10.1063/5.0205375","url":null,"abstract":"Electrolyte material optimization is crucial for electrochemical energy storage devices. The specific composition and structure have an impact on conductivity and stability, both of which are essential for efficient device performance. The effects of controlled incorporation of TiO2 into a Yttria-Stabilized Zirconia (YSZ) electrolyte using the atomic layer deposition (ALD) technique are investigated in this study. The surface chemical composition analysis reveals variations in the Ti oxidation state and a decrease in the O/(Zr + Y + Ti) ratio as TiO2 concentration increases. The formation of acceptor states near the valence band is proposed to reduce the bandgap with the Fermi level. The structural properties indicate that as TiO2 concentration increases, surface homogeneity and crystallite size increase. The contact angle with water indicates a hydrophobic behavior influenced by surface morphology and potential oxygen vacancies. Finally, electrical properties, measured in Ru/TiO2-doped YSZ/Au capacitors operated at temperatures between 100 and 170 °C, showed that the TiO2 incorporation improved the ionic conductivity, decreased the activation energy for conductivity, and improved the capacitance of the cells. This study highlights the importance of the ALD technique in solid-state electrolyte engineering for specific applications, such as energy storage devices.","PeriodicalId":7985,"journal":{"name":"APL Materials","volume":"28 1","pages":""},"PeriodicalIF":6.1,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140930445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Continuous pipe-stream self-assembly technology for preparation of high sphericity FOX-7/HMX energetic composite microspheres 制备高球形度 FOX-7/HMX 高能复合微球的连续管流自组装技术

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-05-09 DOI: 10.1063/5.0208981

Xiangyu Zhang, Jianquan Jing, Jiaoyang Liu, Liting Zhang, Leixin Qi, Chongwei An

{"title":"Continuous pipe-stream self-assembly technology for preparation of high sphericity FOX-7/HMX energetic composite microspheres","authors":"Xiangyu Zhang, Jianquan Jing, Jiaoyang Liu, Liting Zhang, Leixin Qi, Chongwei An","doi":"10.1063/5.0208981","DOIUrl":"https://doi.org/10.1063/5.0208981","url":null,"abstract":"The emphasis on producing high-energy and insensitive composite microspheres has increased in energetic materials. However, few methods are available for preparing good spherical and morphological composite microspheres. To produce composite microspheres that are both high-energy and safe, in this article, a continuous pipe-stream self-assembly device was constructed to produce FOX-7/HMX composite microspheres continuously and taking advantage of the principle that PVA and Tween-80 can reduce the surface tension of the microspheres in water. In comparison with the molding powders produced by the kneading way, the FOX-7/HMX composite microspheres prepared by this device had fewer surface defects, a denser structure, a more spherical shape, and a smaller range of particle sizes. The mechanical properties of the pressed columns were better, with maximum compressive strength and strain increased by 44.2% and 21.4%, respectively; and the flowability and bulk density were also improved to some extent (angle of repose: energetic microspheres vs kneading method molding powder, 26.6° vs 51.1°; bulk density: energetic microspheres vs kneading method molding powder, 0.522 vs 0.426 g/cm3). Mechanical sensitivity has also been significantly reduced. This article provides innovative ideas for preparing high-energy and insensitive composite microspheres using a continuous pipe-stream self-assembly device.","PeriodicalId":7985,"journal":{"name":"APL Materials","volume":"42 1","pages":""},"PeriodicalIF":6.1,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140930663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultrafast state-selective tunneling in two-dimensional semiconductors with a phase- and amplitude-controlled THz-scanning tunneling microscope 用相位和振幅控制太赫兹扫描隧道显微镜观察二维半导体中的超快状态选择性隧道现象

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-05-07 DOI: 10.1063/5.0200845

L. Bobzien, J. Allerbeck, S. E. Ammerman, R. Torsi, J. A. Robinson, B. Schuler

引用次数: 0

Effect of bonding description and strain regulation on the conductive transition of Bi semimetal 键合描述和应变调节对双金属导电转变的影响

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-05-07 DOI: 10.1063/5.0206964

Xing-Yu Yang, Jia-Ying Cao, Xiao-hang Ma, Shi-Hao Ren, Yong-Li Liu, F. S. Meng, Yang Qi

{"title":"Effect of bonding description and strain regulation on the conductive transition of Bi semimetal","authors":"Xing-Yu Yang, Jia-Ying Cao, Xiao-hang Ma, Shi-Hao Ren, Yong-Li Liu, F. S. Meng, Yang Qi","doi":"10.1063/5.0206964","DOIUrl":"https://doi.org/10.1063/5.0206964","url":null,"abstract":"Due to the differences in the treatment methods of the electron–ion interaction and the critical strain mode of the transition from semimetals to semiconductors, the corresponding strain modulation mechanism in layered bismuth (Bi) crystals remains elusive. In this work, the effects of van der Waals (vdW) correction on the crystal structure and electrical properties of Bi in an equilibrium/strained state are comparatively studied based on the density functional theory. It is found that vdW corrections can better describe the layered crystal and bandgap structure of Bi under equilibrium/strain conditions. With the vdW modification, bismuth can be converted from a semimetal to a semiconductor within a small compression range that is experimentally available. This transition is induced by the transfer of the conduction band minimum and the valence band maximum and is related to the competition of the near-band edge energy state near the Fermi level of bismuth. The present results not only provide guidance for the accurate study of the crystal structure and electronic properties of complex model systems, such as Bi or Bi-based inherently nanostructured materials, but also reveal strain regulation mechanism of Bi and predict its potential application in the semiconductor electronic devices.","PeriodicalId":7985,"journal":{"name":"APL Materials","volume":"32 1","pages":""},"PeriodicalIF":6.1,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140930738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural, morphological, optical, electrical, and magnetic properties of aluminum-doped CoxCa(0.90−x)Ni0.10Fe2O4 flexible substrate for visible to NIR spectra applications 用于可见光至近红外光谱应用的铝掺杂 CoxCa(0.90-x)Ni0.10Fe2O4 柔性衬底的结构、形态、光学、电学和磁学特性

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-05-07 DOI: 10.1063/5.0203785

Md. Bakey Billa, Mohammad Tariqul Islam, Touhidul Alam, Md. Shabiul Islam, Asraf Mohamed Moubark, Haitham Alsaif, Saleh Albadran, Ahmed Alzamil, Ahmed S. Alshammari

{"title":"Structural, morphological, optical, electrical, and magnetic properties of aluminum-doped CoxCa(0.90−x)Ni0.10Fe2O4 flexible substrate for visible to NIR spectra applications","authors":"Md. Bakey Billa, Mohammad Tariqul Islam, Touhidul Alam, Md. Shabiul Islam, Asraf Mohamed Moubark, Haitham Alsaif, Saleh Albadran, Ahmed Alzamil, Ahmed S. Alshammari","doi":"10.1063/5.0203785","DOIUrl":"https://doi.org/10.1063/5.0203785","url":null,"abstract":"This paper presents a conductive component tailored to a flexible substrate using Al-doped CoxCa(0.90−x)Ni0.10Fe2O4 (x = 0.25, 0.50, and 0.75) for visible to near-infrared (NIR) spectra in magneto-optical applications. The developed nanoparticles show uniformity, nanosized grains, and capillary nanopore fusion characteristics, which are confirmed by x-ray diffraction (XRD), field emission scanning electron microscopy, and energy-dispersive x-ray spectroscopy analyses, respectively. The XRD analysis revealed crystallite sizes of 33.36, 37.08, and 44.25 nm and particle sizes of 45.6, 34.6, and 31.5 nm for the compositions x = 0.25, 0.50, and 0.75, respectively. The Al-doped nanoparticles are converted to a flexible solid substrate utilizing a polyvinyl alcohol matrix, facilitating conformality to build complex shapes and broadening their application scope. The structure shows higher absorption across 450–720 nm, 480–720 nm, and 200–850 nm spectra for x = 0.25, 0.50, and 0.75, respectively. The distinctive magnetic and electrical properties are also evaluated through magnetic force microscopy and conductive atomic force microscopy, culminating in a substrate with exceptional control over light–matter interactions with smooth surfaces with lower surface roughness. The vibrating sample magnetometer analysis of the substrate shows how varying cobalt content affects magnetic properties relevant for visible to near-infrared (NIR) applications, offering insights into coercivity, magnetization, and retentivity changes at different x values. The perceptible novelties of this work are advancements in material sciences aimed at enhancing light manipulation and flexibility for electronic devices.","PeriodicalId":7985,"journal":{"name":"APL Materials","volume":"6 1","pages":""},"PeriodicalIF":6.1,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140930442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0