Crystal Research and Technology最新文献_第4页

Preparation of B4C-Based Multiphase Composites with Binary Y2O3 and Nd2O3 Sintering Aids by Spark Plasma Sintering 火花等离子烧结制备双Y2O3和Nd2O3助烧结剂b4c基多相复合材料

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-08-27 DOI: 10.1002/crat.70157

Jiaqi Zhang, Yuhang Tong, Jianxin Sun, Tingting Zhang, Zhigang Yang, Huayan Si, Shengjian Qin, Hongya Wu, Guoqiang Qin, Gang Yu, Lei Wen

{"title":"Preparation of B4C-Based Multiphase Composites with Binary Y2O3 and Nd2O3 Sintering Aids by Spark Plasma Sintering","authors":"Jiaqi Zhang, Yuhang Tong, Jianxin Sun, Tingting Zhang, Zhigang Yang, Huayan Si, Shengjian Qin, Hongya Wu, Guoqiang Qin, Gang Yu, Lei Wen","doi":"10.1002/crat.70157","DOIUrl":"https://doi.org/10.1002/crat.70157","url":null,"abstract":"<div>\u0000 \u0000 The densification behavior and mechanical properties of B4C-based composite ceramics were tailored by introducing Y2O3–Nd2O3 rare earth oxide additives during spark plasma sintering. The effects of additive content and sintering temperature on phase evolution, microstructure, and mechanical performance were systematically investigated. The additives promoted liquid phase formation and significantly enhanced densification. High temperature reactions between B4C and the oxides produced secondary phases including (YNd)B6, (YNd)B4, (YNd)3C4, (YNd)BO3, and B2O3, with (YNd)B6 forming preferentially. Increasing the additive content and sintering temperature led to a rise, followed by a decline, in relative density, hardness, flexural strength, and fracture toughness. At 1800°C, the composites achieved a flexural strength of 337 MPa and a fracture toughness of 2.73 MPa•m1/2. These results demonstrate an effective approach for controlling phase formation and improving the mechanical performance of B4C-based composite ceramics.\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 9","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148823203","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}

引用次数: 0

Effects of Melt Zone Movement Rate on Crystallization Quality and Photoelectric Properties of GaInSb Crystals Grown With Traveling Heater Method 熔融区移动速率对行加热生长GaInSb晶体结晶质量和光电性能的影响

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-08-12 DOI: 10.1002/crat.70152

Jingxuan Ji, Jian Liu, Huiying Luo, Yingwu Zhang, Xinhu Zhang, Wenhao Yu, Juncheng Liu

{"title":"Effects of Melt Zone Movement Rate on Crystallization Quality and Photoelectric Properties of GaInSb Crystals Grown With Traveling Heater Method","authors":"Jingxuan Ji, Jian Liu, Huiying Luo, Yingwu Zhang, Xinhu Zhang, Wenhao Yu, Juncheng Liu","doi":"10.1002/crat.70152","DOIUrl":"https://doi.org/10.1002/crat.70152","url":null,"abstract":"<div>\u0000 \u0000 Ga0.9In0.1Sb crystals (27 mm diameter, 90 mm length) were prepared with a [110] oriented GaSb seed crystal through the traveling heater method (THM), and the effects of the melt zone movement rate on the structures and photoelectric properties were investigated. The crystallization quality and the photoelectric properties of the crystals initially improved and then declined with the melt zone movement rate increased from 0.5 mm/h to 1.5 mm/h. When the movement rate was 1.0 mm/h, the crystallization quality and the photoelectric properties were optimal, the crystal's dislocation density (1.51× 103 cm−2) and radial segregation (0.032 mol%/mm) got their own lowest values, while its carrier concentration (1.57 × 1018 cm−3), carrier mobility (1.71× 103 cm2/(V•s)), and infrared transmittance (55%) got their own highest values. However, when the rate was 0.5 mm/h, the crystallization quality and photoelectric properties were the worst, the dislocation density got the maximum 2.98 × 103 cm−2, the radial segregation got the maximum 0.074 mol%/mm, while the carrier concentration got the minimum 1.37 × 1018 cm−3, and the carrier mobility got the minimum 1.57 × 103 cm2/(V•s).\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 8","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753460","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}

引用次数: 0

Multifunctional Ag/ZnO. Nanocomposites: Synthesis, Characterization, and Potent Antioxidant, Antibiofilm, and Anti-Inflammatory Activities 多功能Ag /氧化锌。纳米复合材料：合成、表征和有效的抗氧化、抗生物膜和抗炎活性

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-08-11 DOI: 10.1002/crat.70150

Laid Zeghoud, Abderrhmane Bouafia, Ibtissam Laib, Manel Azzi, Mohammed Adel Mesbahi, Souhaila Meneceur, Salah Eddine Laouini, Mohammed Tayeb Oucif Khaled

{"title":"Multifunctional Ag/ZnO. Nanocomposites: Synthesis, Characterization, and Potent Antioxidant, Antibiofilm, and Anti-Inflammatory Activities","authors":"Laid Zeghoud, Abderrhmane Bouafia, Ibtissam Laib, Manel Azzi, Mohammed Adel Mesbahi, Souhaila Meneceur, Salah Eddine Laouini, Mohammed Tayeb Oucif Khaled","doi":"10.1002/crat.70150","DOIUrl":"https://doi.org/10.1002/crat.70150","url":null,"abstract":"<div>\u0000 \u0000 Ag/ZnO nanocomposites have attracted significant interest due to their enhanced physicochemical properties and wide-ranging biomedical applications. In this study, the nanocomposites were successfully synthesized and thoroughly characterized. X-ray diffraction confirmed the presence of a highly crystalline hexagonal ZnO structure with incorporated metallic Ag nanoparticles; the crystallite size, determined by the Scherrer equation, was approximately 55 nm. Scanning electron microscopy revealed quasi-spherical particles exhibiting uniform morphology and good dispersion. UV–Vis spectroscopy displayed a prominent absorption band at 383 nm and a narrowed optical band gap of 1.70 eV, indicating strong electronic interactions between Ag and ZnO, along with improved surface reactivity. Biological evaluation demonstrated potent multifunctional activities. In the DPPH assay, the nanocomposites showed concentration-dependent antioxidant activity, achieving 79% radical scavenging at 400 µg/mL, with an IC50 of 166.79 µg/mL. The FRAP assay confirmed strong reducing power, rising from 120.22 to 760.37 µM Fe2+/g with increasing concentration. The materials exhibited excellent antibiofilm effects against pathogenic bacteria, inhibiting biofilm formation by up to 90%. Additionally, they effectively inhibited protein denaturation in the anti-inflammatory assay, yielding an IC50 of 137.83 µg/mL. These findings underscore the substantial biomedical potential of Ag/ZnO nanocomposites.\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 8","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753469","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}

引用次数: 0

Issue Information: Crystal Research and Technology 8'2026 发行信息：晶体研究与技术8'2026

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-08-11 DOI: 10.1002/crat.70154

引用次数: 0

Aegle Marmelos Extract Synthesis of Zn-MoO3 NPs: Probing of Electrochemical Sensing Actions on Mercury Ions With Photocatalytic Applications 蜜桔提取物Zn-MoO3 NPs的合成：光催化研究对汞离子的电化学传感作用

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-08-11 DOI: 10.1002/crat.70145

Khandugadahalli Nagarajappa Harish, Kiran T, Surendra B.S, Bharath M J, Namitha R, Kosagi Shyam Prasad, Prashanth K. K, Thibbegowda Prashanth, Sathish Reddy

{"title":"Aegle Marmelos Extract Synthesis of Zn-MoO3 NPs: Probing of Electrochemical Sensing Actions on Mercury Ions With Photocatalytic Applications","authors":"Khandugadahalli Nagarajappa Harish, Kiran T, Surendra B.S, Bharath M J, Namitha R, Kosagi Shyam Prasad, Prashanth K. K, Thibbegowda Prashanth, Sathish Reddy","doi":"10.1002/crat.70145","DOIUrl":"https://doi.org/10.1002/crat.70145","url":null,"abstract":"<div>\u0000 \u0000 This research probes an Aegle marmelos extract mediated synthesis of host-MoO3 and Zn-MoO3 nanomaterials (NPs) via a solution combustion route. Structural, morphological, and optical characterization of the fabricated materials was conducted via Powder X-ray diffraction (PXRD), (SEM-EDX)Scanning Electron Microscope- Energy - Dispersive X -Ray spectroscopy, Fourier Transform Infrared (FT-IR), and UV–vis spectral techniques. The synthesized Zn-doped material serves as a cost-effective, sustainable platform for excellent photocatalytic and electrochemical sensing applications. The outcome of optical analysis and Tauc's plots for Zn-MoO3 (3.5 eV) NPs revealed improved photo-degradation activity than MoO3 (3.94 eV), confirming the impact of Zn doping in hindered the recombination of e−–h+ pairs. The superior photocatalytic degradation of Methylene Blue (MB) by Zn-MoO3 NPs under light irradiation was examined. Its degradation efficiency was found to be 94.8% at 105 min, conforming to pseudo-first-order kinetics (k = 0.0204 min−1). The electrochemical sensing action of modified Zn-MoO3 NPs was examined on mercury ions (1–5 mm) at 30 mV/s in 0.1 m KCl. LOD and LOQ measurements of Zn-MoO3 NPs were determined to be 0.12 & 0.367 mm respectively, with high current at −0.18 V. These measurements direct a route for photocatalytic and electrochemical sensor applications.\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 8","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753175","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}

引用次数: 0

Polymorph Transformation of Pentacene Thin Films Associated with Crystal-to-Liquid Crystal Transitions of Buffer Layers 并五苯薄膜的多晶转变与缓冲层的晶体到液晶转变

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-08-11 DOI: 10.1002/crat.70151

Miyuki Tanaka, Shingo Maruyama, Tomoyuki Koganezawa, Kenichi Kaminaga, Yuji Matsumoto

{"title":"Polymorph Transformation of Pentacene Thin Films Associated with Crystal-to-Liquid Crystal Transitions of Buffer Layers","authors":"Miyuki Tanaka, Shingo Maruyama, Tomoyuki Koganezawa, Kenichi Kaminaga, Yuji Matsumoto","doi":"10.1002/crat.70151","DOIUrl":"https://doi.org/10.1002/crat.70151","url":null,"abstract":"<div>\u0000 \u0000 A buried liquid crystal (LC) buffer layer is examined as a thermally switchable interface for post-deposition irreversible polymorph transformation in pentacene thin films. Variable-temperature 2D grazing-incidence X-ray diffraction (2D-GIXD) reveals that pentacene on bare SiO2/Si remains predominantly in the thin-film phase after thermal cycling, whereas pentacene on Ph-BTBT-C10 undergoes an irreversible transformation from the thin-film phase to the Campbell phase, coupled with the onset of the buffer crystal-to-LC transition. The extent of transformation is found to depend on the interfacial configuration of the pentacene/Ph-BTBT-C10 bilayer, i.e., whether Ph-BTBT-C10 is used as the underlayer or overlayer. Separate measurements on additional LC buffer layers reveal a certain association between pentacene transformation and buffer layer LC transition, indicating that buried LC interfaces may provide a means of facilitating post-deposition polymorph conversion in organic semiconductor thin films.\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 8","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753176","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}

引用次数: 0

First-Principles Study of the Structural, Elastic, and Mechanical Properties of Cubic CsF Under Hydrostatic Compression 静压下立方脑脊液结构、弹性和力学特性的第一性原理研究

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-08-09 DOI: 10.1002/crat.70146

Mohamed Khedidji, Mouloud Dahmane, Mouloud Fouad Laoui, Zine Labidine Chini, Houssyen Yousfi, Mohamed Trari

引用次数: 0

Effect of Mn and La Doping on the Structural, Morphological and Magnetic Properties of Cobalt Ferrite Mn和La掺杂对钴铁氧体结构、形态和磁性能的影响

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-08-09 DOI: 10.1002/crat.70143

G. Mukhtar, J. Mohammed, Nazif Halilu, Simran Kaur, A. K. Srivastava

{"title":"Effect of Mn and La Doping on the Structural, Morphological and Magnetic Properties of Cobalt Ferrite","authors":"G. Mukhtar, J. Mohammed, Nazif Halilu, Simran Kaur, A. K. Srivastava","doi":"10.1002/crat.70143","DOIUrl":"https://doi.org/10.1002/crat.70143","url":null,"abstract":"<div>\u0000 \u0000 The present investigation establishes a relationship between lattice distortion, cation distribution, and magnetic properties, and proves that Mn2+/La3+ co-substitution is an efficient route to tailor the structural and magnetic properties of cobalt ferrites. Co1−2xMnxLaxFe2O4 (x = 0.00 to 0.10) nanoparticles were synthesized via the sol–gel auto-combustion route to investigate the effect of Mn2+ and La3+ co-substitution on the structural, morphological, and magnetic properties of cobalt ferrite. XRD patterns reveal a single cubic spinel phase for all samples. FTIR spectra show the typical metal-oxygen bands for both tetrahedral and octahedral sites, confirming the spinel structure and exhibiting small band shifts due to cation substitution and lattice distortions. FESEM images reveal a nanoscale particle size with an agglomerated structure, and grain refinement at lower doping concentrations. Room temperature VSM analysis confirms ferrimagnetic behavior for all samples. The saturation magnetization increases from 82.63 to 87.34 emu/g at x = 0.02 due to enhanced magnetic contribution from Mn2+ at the B-site, followed by a decrease at higher Mn/La doping levels due to magnetic dilution from non-magnetic La3+ ions and spin canting effects. Coercivity exhibits a non-monotonic variation, reaching a maximum at x = 0.02, consistent with increased magneto-crystalline anisotropy and strain-induced stress anisotropy.\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 8","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753023","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}

引用次数: 0

Structural, Electrical and Electromechanical Properties Control Over Primary and Secondary Nucleation in Poly (L-Lactic Acid) Film 聚l -乳酸薄膜初、二次成核的结构、电学和机电性能控制

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-08-09 DOI: 10.1002/crat.70149

Júlio Rocha, Marta Fernandes, Paula M. Vilarinho, Maxim Ivanov

{"title":"Structural, Electrical and Electromechanical Properties Control Over Primary and Secondary Nucleation in Poly (L-Lactic Acid) Film","authors":"Júlio Rocha, Marta Fernandes, Paula M. Vilarinho, Maxim Ivanov","doi":"10.1002/crat.70149","DOIUrl":"https://doi.org/10.1002/crat.70149","url":null,"abstract":"<div>\u0000 \u0000 In this work, we have studied the effects of thermal and electrical processing on crystallization, electrical, and electromechanical behavior of polymeric Poly (L-lactic acid) (PLLA) films deposited on top of medical-grade 316L stainless steel using the rapid thermal annealing (RTA) method. Stepwise annealing at 180°C and 120°C produced well-defined crystalline spherulitic structures under an air atmosphere, while a vacuum atmosphere produced amorphous films, confirming the key role of nitrogen and oxygen elements in the promotion of the primary nucleation process. The secondary nucleation process was further modulated by corona-poling discharge at a DC bias voltage of –5 kV, which induced dipole alignment as evidenced by Maltese cross patterns and enhanced birefringence. To achieve nanoscale control, Atomic Force Microscopy-based local poling with electric fields of 3 GV/m was used to generate predefined polarization patterns. Kelvin Probe Force Microscopy and Piezoresponse Force Microscopy analyses confirmed reversible dipole switching, while Electrostatic Force Microscopy measurements revealed stable surface charges confined to crystalline regions, indicating that the observed charges are electromechanical and not electrostatic in origin. These results demonstrate a multiscale strategy for controlling crystallization and polarization in thin PLLA films. The combined RTA and electric-field-assisted methods enable precise tuning of piezoelectric properties in semicrystalline regions of PLLA for advanced sensing and bioelectronic applications.\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 8","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753024","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}

引用次数: 0

Review on Oxygen Concentration in Czochralski Grown Silicon Crystals for Photovoltaic and Semiconductor Devices 光伏和半导体器件用Czochralski生长硅晶体氧浓度研究进展

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-08-09 DOI: 10.1002/crat.70139

Beenaben S S, Gokul Jayavel, Srinivasan Manickam, Mariyappan Raman, Thiruvarasu Tamilarasu, Thi-Hoai-Thu Nguyen, Jyh-Chen Chen

{"title":"Review on Oxygen Concentration in Czochralski Grown Silicon Crystals for Photovoltaic and Semiconductor Devices","authors":"Beenaben S S, Gokul Jayavel, Srinivasan Manickam, Mariyappan Raman, Thiruvarasu Tamilarasu, Thi-Hoai-Thu Nguyen, Jyh-Chen Chen","doi":"10.1002/crat.70139","DOIUrl":"https://doi.org/10.1002/crat.70139","url":null,"abstract":"<div>\u0000 \u0000 Czochralski (Cz) crystal growth remains the dominant technique for producing Monocrystalline Silicon (Mono-Si) for photovoltaic and semiconductor applications. However, the performance and yield of Cz-grown silicon ingots are strongly influenced by oxygen incorporation during crystal growth. This review critically examines both modeling and experimental studies addressing oxygen impurity behaviors in Cz-grown Mono-Si, with particular emphasis on achieving lower oxygen concentration and improved spatial uniformity within the crystal and melt. The influence of key growth parameters including pulling rate, crystal and crucible rotation, melt convection, argon flow rate and pressure, crystal diameter and length, heater configuration, and applied magnetic fields—on oxygen incorporation and transport is systematically discussed. Advances in global and Multiphysics simulations used to predict oxygen transport, chemical reactions, and deposition during crystal growth are also reviewed. Furthermore, optimized rotation conditions and crucible geometries aimed at improving crystal quality are summarized. Experimental characterization techniques such as Fourier-transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), photoluminescence (PL), and related methods are reviewed to correlate oxygen-related defects with growth conditions. This review provides a comprehensive overview of oxygen-induced defects and mitigation strategies in Cz-grown silicon, offering insights for the development of device-quality silicon ingots for photovoltaic and semiconductor technologies.\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 8","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753027","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}

引用次数: 0