APL Materials最新文献_第2页

α-Ta films on c-plane sapphire with enhanced microstructure 具有增强微观结构的 c 平面蓝宝石上的α-Ta 薄膜

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-09-06 DOI: 10.1063/5.0218021

Lena N. Majer, Sander Smink, Wolfgang Braun, Bernhard Fenk, Varun Harbola, Benjamin Stuhlhofer, Hongguang Wang, Peter A. van Aken, Jochen Mannhart, Felix V. E. Hensling

引用次数: 0

Growth of bilayer transition metal dichalcogenides at controlled locations 在受控位置生长双层过渡金属二钙化物

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-09-05 DOI: 10.1063/5.0221397

Chengyu Wen, Carl H. Naylor, Kevin P. O’Brien, Adedapo Oni, Mahmut S. Kavrik, Yeonjoon Suh, A. T. Charlie Johnson

引用次数: 0

Composition and strain of the pseudomorphic α-phase intermediate layer at the Ga2O3/Al2O3 interface Ga2O3/Al2O3 界面伪α相中间层的成分和应变

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-09-05 DOI: 10.1063/5.0226857

M. Schowalter, A. Karg, M. Alonso-Orts, J. A. Bich, S. Raghuvansy, M. S. Williams, F. F. Krause, T. Grieb, C. Mahr, T. Mehrtens, P. Vogt, A. Rosenauer, M. Eickhoff

{"title":"Composition and strain of the pseudomorphic α-phase intermediate layer at the Ga2O3/Al2O3 interface","authors":"M. Schowalter, A. Karg, M. Alonso-Orts, J. A. Bich, S. Raghuvansy, M. S. Williams, F. F. Krause, T. Grieb, C. Mahr, T. Mehrtens, P. Vogt, A. Rosenauer, M. Eickhoff","doi":"10.1063/5.0226857","DOIUrl":"https://doi.org/10.1063/5.0226857","url":null,"abstract":"We investigate the composition of α-phase intermediate layers at epitaxial Ga2O3/Al2O3 interfaces using high angle annular dark field scanning transmission electron microscopy. Their presence is considered a general phenomenon as they are observed independent of the growth technique [Schewski et al., Appl. Phys. Exp. 8, 011101]. Samples were grown by plasma assisted molecular beam epitaxy using different growth conditions. Almost independent of these, the quantitative evaluation of the measured intensities gave Ga concentrations of ∼25%. We show that the previously published model, based on a pure α-Ga2O3 interlayer, fails if it is adapted to the measured composition. Density functional theory (DFT) computations were used to overcome the approximations made in this model and suggest that a stabilization of the layer is possible due to the low Ga concentration (≤35%) at which the α-phase is the most stable. Our surface model computations suggest an exchange of Ga atoms at the surface with Al atoms from the underlying substrate as a possible formation mechanism.","PeriodicalId":7985,"journal":{"name":"APL Materials","volume":null,"pages":null},"PeriodicalIF":6.1,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142197802","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

Intra-family transformation of the Bi–Te family via in situ chemical interactions 通过原位化学作用实现双碲族的族内转化

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-09-05 DOI: 10.1063/5.0223779

Zhihao He, Tin Seng Manfred Ho, Chen Ma, Jiannong Wang, Rolf Lortz, Iam Keong Sou

{"title":"Intra-family transformation of the Bi–Te family via in situ chemical interactions","authors":"Zhihao He, Tin Seng Manfred Ho, Chen Ma, Jiannong Wang, Rolf Lortz, Iam Keong Sou","doi":"10.1063/5.0223779","DOIUrl":"https://doi.org/10.1063/5.0223779","url":null,"abstract":"The Bi–Te binary system, characterized by the homologous series of (Bi2)m(Bi2Te3)n, has always attracted research interest for its layered structures and potential in advanced material applications. Despite the fact that Bi2Te3 has been extensively studied, the exploration of other compounds has been constrained by synthesis challenges. This study reports the molecular beam epitaxy growth of FeTe on Bi2Te3, demonstrating that varying growth conditions can turn the Bi2Te3 layer into different Bi–Te phases and form corresponding FeTe/Bi–Te heterostructures. Our combined analysis using reflection high-energy electron diffraction, high-resolution x-ray diffraction, and high-resolution scanning transmission electron microscopy indicates that specific growth conditions used for the growth of the FeTe layer can facilitate the extraction of Te from Bi2Te3, leading to the formation of Bi4Te3 and Bi6Te3. In addition, by lowering the FeTe growth temperature to 230 °C, Te extraction from the Bi2Te3 layer could be avoided, preserving the Bi2Te3 structure. Notably, all three FeTe/Bi–Te structures exhibit superconductivity, with the FeTe/Bi2Te3 heterostructure enjoying the highest superconductivity quality. The results of magneto-transport measurements indicate that the induced superconductivity displays a three-dimensional nature. These findings introduce a novel method for realizing Bi4Te3 and Bi6Te3 through Te extraction by growing FeTe on Bi2Te3, driven by the high reactivity between Fe and Te. This approach holds promise for synthesizing other members of the Bi–Te series, expanding the functional potential of these materials.","PeriodicalId":7985,"journal":{"name":"APL Materials","volume":null,"pages":null},"PeriodicalIF":6.1,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142197800","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

Material discovery and modeling acceleration via machine learning 通过机器学习加速材料发现和建模

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-09-04 DOI: 10.1063/5.0230677

Carmine Zuccarini, Karthikeyan Ramachandran, Doni Daniel Jayaseelan

引用次数: 0

Nanozyme microspheres with structural color-coding labels for synergistic therapy of psoriasis 用于银屑病协同治疗的带结构色标的纳米酶微球

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-09-03 DOI: 10.1063/5.0229803

Nengjie Yang, Yuting Huang, Chen Dong, Chi Sun, Peipei Xi, Yuexiao Dai, Rui Zhao, Yunan Wang, Yujuan Zhu, Zhifeng Gu

{"title":"Nanozyme microspheres with structural color-coding labels for synergistic therapy of psoriasis","authors":"Nengjie Yang, Yuting Huang, Chen Dong, Chi Sun, Peipei Xi, Yuexiao Dai, Rui Zhao, Yunan Wang, Yujuan Zhu, Zhifeng Gu","doi":"10.1063/5.0229803","DOIUrl":"https://doi.org/10.1063/5.0229803","url":null,"abstract":"Psoriasis is an immune system-mediated skin disease identified by the appearance of erythematous as a central symptom. As a recurrent and chronic inflammatory disease, psoriasis is influenced by both genetic and environmental factors and is known to be with no effective cure. Considering a multifaceted etiology of psoriasis, synergistic therapy exhibits great benefits over monotherapy, which becomes common for the treatment of various diseases. Herein, we present the nanozyme microspheres with structural color-coding labels for synergistic therapy of psoriasis. In particular, microsphere hydrogel is fabricated by the edible hydroxypropyl cellulose (HPC), which can generate a photonic liquid crystalline mesophase under lyotropic conditions in solution. Through adjustment of hydrogel components, microspheres endow with different functions, including moisturizing (paraffin), cfDNA scavenging (chitosan), and anti-inflammation (cerium oxide nanozyme). To improve patient convenience, hydrogel drops with different properties are tailored with different vivid structural colors by exploiting the lyotropic behavior of HPC. Of particular note, both in vitro and in vivo experiments have demonstrated the significant therapeutic effects of the encoded structural color microspheres. Green moisturizing microspheres facilitate to relieve dry, flaky skin patches; blue cfDNA scavenging and red anti-inflammatory microspheres significantly reduce skin inflammation. More importantly, combination therapy with encoded microspheres exerted the synergistic effects, including the increased body weight, thicker epidermal layer, and reduced immune activation. Overall, this synergistic treatment offers a promising platform for personalized management of psoriasis and various inflammatory skin diseases.","PeriodicalId":7985,"journal":{"name":"APL Materials","volume":null,"pages":null},"PeriodicalIF":6.1,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142197801","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

Visible/near-infrared luminescence and concentration effects of Pr3+-doped Sr2Al2GeO7 downconversion phosphors 掺杂 Pr3+ 的 Sr2Al2GeO7 下转换荧光粉的可见光/近红外发光和浓度效应

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-09-03 DOI: 10.1063/5.0226329

Tiantian Shen, Shanshan Zhao, An Su, Haisheng Liu, Fayi Chen, Benchun Li, Xinxin Han, Dechao Yu, Dawei Zhang

{"title":"Visible/near-infrared luminescence and concentration effects of Pr3+-doped Sr2Al2GeO7 downconversion phosphors","authors":"Tiantian Shen, Shanshan Zhao, An Su, Haisheng Liu, Fayi Chen, Benchun Li, Xinxin Han, Dechao Yu, Dawei Zhang","doi":"10.1063/5.0226329","DOIUrl":"https://doi.org/10.1063/5.0226329","url":null,"abstract":"The Pr3+ ion has been widely doped into various materials as a red and near-infrared (NIR) emitting center for applications in lighting and solar spectrum downconversion. Herein, the preparation of a new library of Pr3+-doped Sr2Al2GeO7 phosphors was proved by powder x-ray diffraction patterns and Rietveld refinements and characterized by a scanning electron microscope with energy-dispersive x-ray spectrometry. The Sr2Al2GeO7:Pr3+ sample strongly absorbs blue photons over 420–500 nm and yields intense visible emissions with dominant peaks around 490 nm from the Pr3+ 3P0 → 3H4 transition, as well as robust NIR emission bands over 800–1200 nm. In addition to the typical transitions of 1D2 → 3F2 at 880 nm, 1G4 → 3H4 at 1000 nm, and 1D2 → 3F3,4 at 1070 nm, the distinguishable NIR emission at 929 nm was demonstrated from the 3P0 → 1G4 transition via static and dynamic spectroscopic analysis. Most interestingly, for the 3P0 blue-excited state, a considerably elevated concentration of about 10%Pr3+ was optimal for the visible/NIR emissions, in stark contrast to the diluted optimal 1%Pr3+ for the 1D2 state. The relevant cross-relaxation from the 3P0 and 1D2 states between Pr3+ was comprehensively treated by theoretical speculations and experimental results. Such concentrated Pr3+ blue activators would significantly facilitate the blue-to-NIR downconversion through a desired two-step sequential transition from the 3P0 initial state to the 1G4 intermediate level for quantum efficiency exceeding unity. The current results would consolidate the basis of concentrated Pr3+ donors to promote the novel Pr3+/Yb3+ codoping downconversion for greatly increasing Si solar cell efficiency.","PeriodicalId":7985,"journal":{"name":"APL Materials","volume":null,"pages":null},"PeriodicalIF":6.1,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142197805","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

Magnetic casein/CaCO3/Fe3O4 microspheres stimulate osteogenic differentiation 磁性酪蛋白/CaCO3/Fe3O4 微球刺激成骨分化

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-09-03 DOI: 10.1063/5.0229172

Mingjie Zhang, Xiaolei Li, Han Lin

{"title":"Magnetic casein/CaCO3/Fe3O4 microspheres stimulate osteogenic differentiation","authors":"Mingjie Zhang, Xiaolei Li, Han Lin","doi":"10.1063/5.0229172","DOIUrl":"https://doi.org/10.1063/5.0229172","url":null,"abstract":"The quality of life is significantly impacted by bone defects, which calls for the creation of optimum restorative materials with particular qualities. Current repair materials, such as metal alloys, polymer scaffolds, and bone cement, have a number of drawbacks, such as poor fracture toughness, non-degradability, and insufficient osteogenic ability. To address these challenges, we designed a novel magnetic casein/CaCO3/Fe3O4 microspheres (CCFM), combining biodegradability, osteoinductivity, osteoconductivity, and osteogenesis properties together. In vitro studies confirmed the outstanding biocompatibility and osteogenic differentiation effects on MC3T3-E1 cells of CCFM, highlighting their potential as a promising bone regeneration platform for clinical applications. As a novel bone repair material with superparamagnetic properties, CCFM not only possess good osteoinductivity, osteoconductivity, and osteogenesis properties but also can remain in the lesion location for a long time under an external magnetic field, representing a significant advancement in the field of bone tissue engineering and offering new possibilities for effective bone defect remediation and patient care.","PeriodicalId":7985,"journal":{"name":"APL Materials","volume":null,"pages":null},"PeriodicalIF":6.1,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142197803","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

Utilizing (Al, Ga)2O3/Ga2O3 superlattices to measure cation vacancy diffusion and vacancy-concentration-dependent diffusion of Al, Sn, and Fe in β-Ga2O3 利用（Al, Ga）2O3/Ga2O3 超晶格测量阳离子空位扩散以及β-Ga2O3 中铝、锡和铁随空位浓度变化的扩散情况

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-08-30 DOI: 10.1063/5.0206398

Nathan D. Rock, Haobo Yang, Brian Eisner, Aviva Levin, Arkka Bhattacharyya, Sriram Krishnamoorthy, Praneeth Ranga, Michael A. Walker, Larry Wang, Ming Kit Cheng, Wei Zhao, Michael A. Scarpulla

{"title":"Utilizing (Al, Ga)2O3/Ga2O3 superlattices to measure cation vacancy diffusion and vacancy-concentration-dependent diffusion of Al, Sn, and Fe in β-Ga2O3","authors":"Nathan D. Rock, Haobo Yang, Brian Eisner, Aviva Levin, Arkka Bhattacharyya, Sriram Krishnamoorthy, Praneeth Ranga, Michael A. Walker, Larry Wang, Ming Kit Cheng, Wei Zhao, Michael A. Scarpulla","doi":"10.1063/5.0206398","DOIUrl":"https://doi.org/10.1063/5.0206398","url":null,"abstract":"Diffusion of native defects such as vacancies and their interactions with impurities are fundamental to semiconductor crystal growth, device processing, and design. However, the transient equilibration of native defects is difficult to directly measure. We used (AlxGa1−x)2O3/Ga2O3 superlattices (SLs) to detect and analyze transient diffusion of cation vacancies during annealing in O2 at 1000–1100 °C. Using a novel finite difference scheme for diffusion with time- and space-varying diffusion constants, we determined diffusion constants for Al, Fe, and cation vacancies, including the vacancy concentration dependence for Al. In the case of SLs grown on Sn-doped β-Ga2O3 (010) substrates, gradients observed in the extent of Al diffusion indicate a supersaturation of vacancies in the substrates that transiently diffuse through the SLs coupled strongly to Sn and thus slowed compared to undoped cases. In the case of SLs grown on (010) Fe-doped substrates, the Al diffusion is uniform through the SLs, indicating a depth-uniform concentration of vacancies. We find no evidence for the introduction of VGa from the free surface at rates sufficient to affect Al diffusion at at. % concentrations, establishing an upper bound on surface injection. In addition, we show that unintentional impurities in Sn-doped Ga2O3 such as Fe, Ni, Mn, Cu, and Li also diffuse toward the surface and accumulate. Many of these likely have fast interstitial diffusion modes capable of destabilizing devices, thus suggesting that impurities may require further reduction. This work provides a method to measure transients in diffusion-mediating native defects otherwise hidden in common processes such as ion implantation, etching, and film growth.","PeriodicalId":7985,"journal":{"name":"APL Materials","volume":null,"pages":null},"PeriodicalIF":6.1,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142197807","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

Electrical conductivity anisotropy of InGaZn3O6 single crystals by pressurized optical floating zone growth and its oxygen annealing effect 加压光学浮区生长 InGaZn3O6 单晶的电导率各向异性及其氧退火效应

IF 6.1 2区材料科学

APL Materials Pub Date : 2024-08-30 DOI: 10.1063/5.0218948

N. Kase, Y. Kawamura, Y. Kobayashi, T. Inoue, K. Tanaka, N. Miyakawa

引用次数: 0