Microstructural Evolution and Crystallization Behavior of Amorphous Medium-Entropy Ti-Nb-Zr-Ag Thin Films
New Technologies Research Centre, University of West Bohemia（新技术中心，西波希米亚大学）；H.H. Wills Physics Laboratory, University of Bristol（布里斯托尔大学 H.H. 威尔斯物理实验室）；Laser Center HM, Munich University of Applied Sciences HM（慕尼黑应用科学大学 HM 激光中心）；Department of Physics, University of Warwick（华威大学物理系）
Anna Benediktová, Lucie Nedvědová, Michal Procházka, Zdeněk Jansa, Štěpánka Jansová, Christopher D. Woodgate, David Redka, Julie B. Staunton, Ján Minár
Improving the performance of metallic implants increasingly relies on the development of multifunctional surface modifications that combine structural stability, bioactivity, and prevention of bacterial colonization. Medium-entropy alloys (MEAs) represent a promising approach for such coatings, as their chemical complexity allows the formation of structurally stable matrices with tunable properties. In this study, Ti-Nb-Zr and Ti-Nb-Zr-Ag thin films were deposited by magnetron sputtering and subjected to annealing at temperatures of up to 1100 $^{\circ}$C to evaluate the influence of Ag, added for its antibacterial potential, on structural evolution. The as-deposited Ag-free film was fully amorphous, whereas the Ag-containing film exhibited a predominantly amorphous matrix with finely dispersed crystalline nanoparticles, indicating that Ag promoted early-stage crystallization. Both films displayed a fine columnar morphology (column diameter $\sim$15 nm) with dome-like protrusions, a hierarchical surface structure favorable for protein adhesion. Upon annealing, the Ag-free film recrystallized into a granular, loosely packed morphology, while the Ag-containing film retained a compact structure, demonstrating the stabilizing role of Ag. These findings underscore the potential of Ag-containing amorphous MEAs for forming multifunctional coatings with enhanced thermal stability, antibacterial functionality, and biointerface-relevant surface features for advanced biomedical applications.
Percolation-driven $β$ -relaxation enables resonant acceleration of crystallization in amorphous phase-change materials
Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology（华中科技大学物理学院）；Institute of Physics (IA), RWTH Aachen University（亚琛工业大学物理研究所）；Institut für Werkstoffe der Elektrotechnik II (IWE II), RWTH Aachen University（亚琛大学电气工程材料研究所II）；Institut für Werkstoffe der Elektrotechnik I (IWEI), RWTH Aachen University（亚琛大学电气工程材料研究所I）；Center for Alloy Innovation and Design (CAID), State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University（西安交通大学材料力学行为国家重点实验室合金创新与设计中心）；Department of Chemistry, Aarhus University（奥胡斯大学化学系）；CENSEMAT Center for Sustainable Energy Materials, Aarhus University（奥胡斯大学可持续能源材料中心）
Interplay of Crystallization and Amorphous Spinodal Decomposition during Thermal Annealing of Organic Photoactive Layers
Helmholtz Institute Erlangen-Nürnberg for Renewable Energy, Forschungszentrum Jülich（亥姆霍兹埃尔朗根-纽伦堡可再生能源研究所，于利希研究中心）；Friedrich-Alexander-Universität Erlangen-Nürnberg（埃尔朗根-纽伦堡弗里德里希·亚历山大大学）；Technion Israel Institute of Technology（以色列理工学院）
Femtosecond Laser-induced Crystallization of Amorphous Sb2Te3 film and Coherent Phonon Spectroscopy Characterization and Optical Injection of Electron Spins
采用飞秒激光辐照晶化技术将非晶Sb_2Te_3薄膜转变为晶化薄膜。利用高灵敏度的相干声子谱（CPS）技术研究了非晶Sb_2Te_3薄膜在辐照后的晶化过程。CPS揭示了对应于晶体Sb 2 Te 3的特征声子模式的两个声子模式的振动强度，随着激光照射能量密度（LIF）的增加而增强，显示出LIF的结晶度的上升，并且飞秒激光照射是一种良好的后处理技术。利用时间分辨圆偏振泵浦-探测光谱研究了激光诱导晶化Sb_2Te_3薄膜的电子自旋弛豫动力学。实验结果证实了自旋相关的光学跃迁选择定则的有效性和基于自旋光栅的类Sb 2 Te 3拓扑绝缘体自旋等离激元集体模瞬态光学探测方案的可行性.
Effect of lithium bis(oxalato)borate on the Structural, microstructural and electrochemical properties of blend solid polymer electrolyte
采用溶液浇铸法制备了以PEO、PVP为主体的锂离子复合聚合物电解质LiBOB，考察了LiBOB对聚合物电解质的形貌、结构和电化学性能的影响。XRD和FESEM分析表明，盐的加入提高了非晶含量。FTIR光谱证明了络合物的形成。优化体系的离子电导率比无盐体系高两个数量级，即~0.5x10-5 S cm-1（@RT），当O/Li=16时，提高到~0.65 mS cm-1（@100 oC），电导率随温度的变化符合Arrhenius性质。高的离子（~0.99）证明了络合电解质的离子性质。DSC分析表明，结晶度的抑制和玻璃熔融温度向低温移动意味着非晶含量的增加。最后，提出了一个相互作用机制，探索离子传输机制。本电解质体系可作为固态电池的潜在候选者
Crystallization of GeO2 thin films into alpha-quartz: from spherulites to single crystals
压电石英SiO2晶体作为振荡器广泛应用于工业中。石英及其相关的硅酸盐矿物作为一种天然矿物，也是地学和矿物学研究的热点。然而，石英晶体的成核和生长很难控制，也没有完全了解。在这里，我们报告了成功的固态晶化薄膜的非晶GeO 2到石英的各种基板上，包括Al 2 O 3，MgAl 2 O 4，MgO，LaAl O 3和SrTiO 3。在相对较低的退火温度下，结晶过程是球晶：纤维从成核中心径向生长，晶格沿生长方向旋转，旋转角度与到核心的距离之间呈线性关系。对于越来越高的退火温度，石英晶体开始形成。样品的边缘起着重要的作用，促进成核，然后向内生长，直到整个薄膜结晶。控制生长允许合成单晶石英。我们的研究揭示了石英成核和生长过程的复杂性，并为进一步的研究提供了见解。
From pore collapse to crystal growth: ultrafast laser-induced stishovite formation in nanoporous silica
Université Jean Monnet, CNRS, Institut d’Optique Graduate School, Laboratoire Hubert Curien UMR 5516（让·莫兰大学，法国国家科学研究中心，高等光学研究院，于贝尔·居里实验室）；Department of Materials Science and Engineering, The Ohio State University（俄亥俄州立大学材料科学与工程系）
Extending the Flory-Huggins Theory for Crystalline Multicomponent Mixtures
Helmholtz Institute Erlangen-Nürnberg for Renewable Energy, Forschungszentrum Jülich（亥姆霍兹埃尔朗根-纽伦堡可再生能源研究所，于利希研究中心）；Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg（弗里德里希·艾伯特大学埃尔朗根-纽伦堡化学与生物工程系）；Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg（弗里德里希·艾伯特大学埃尔朗根-纽伦堡物理系）
