Article
Chemistry, Physical
Cecilia Herrero, Mark D. Ediger, Ludovic Berthier
Summary: In this study, the heterogeneous transformation kinetics of ultrastable glassy films upon heating were simulated and analyzed. The results show a close correlation between the geometry and dynamics of the liquid-glass interface and the dynamic heterogeneity of the bulk liquid. This study provides a new approach to experimentally access the characteristic length scale of dynamic heterogeneity in supercooled liquids.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Junjie Yin, Christian Pedersen, Michael F. Thees, Andreas Carlson, Thomas Salez, James A. Forrest
Summary: We studied the liquid-like response of vapor-deposited glassy films of polystyrene with gold nanoparticles on the surface. The buildup of polymer material was measured over time and temperature for both as-deposited and rejuvenated films. The surface evolution of the films followed the characteristic power law of capillary-driven surface flows and showed enhanced behavior compared to bulk. The measured relaxation times and particle embedding provided insights into surface mobility and bulk dynamics.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Manuel Meneses-Sanchez, Ruben Turo-Cortes, Carlos Bartual-Murgui, Ivan da Silva, M. Carmen Munoz, Jose Antonio Real
Summary: In this study, the modulation of spin-crossover behavior through the sorption-desorption of guest molecules was investigated by chemically tuning the host structure. The results show that even subtle changes in chemical composition can greatly affect the adsorption capability of small guests and influence the spin-crossover characteristics.
INORGANIC CHEMISTRY
(2021)
Article
Mathematics, Interdisciplinary Applications
Giacomo Gradenigo, Matteo Paoluzzi
Summary: Early studies have shown that the geometric features of the energy landscape play a fundamental role in the crossover from high-temperature simple relaxational dynamics to low-temperature activated relaxation in the glass transition. Active particles are shown to be useful in gaining insight into this topological crossover, especially in inducing critical non-equilibrium correlations in the presence of self-propulsion.
CHAOS SOLITONS & FRACTALS
(2021)
Article
Chemistry, Physical
Aparna Beena Unni, Robert Mroczka, Jerzy Kubacki, Karolina Adrjanowicz
Summary: This study investigates the presence of irreversibly adsorbed material in vapor deposited glasses and reveals the correlation between the variation of adsorbed material and the deviation of deposition rate and substrate temperature. The physical and chemical nature of the adsorbed material is characterized using multiple techniques.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Jing Zhou, Si-Yi Di, Bao-An Sun, Rui Zhao, Qiao-Shi Zeng, Jian-Guo Wang, Zhen-Zhong Sun, Wei-Hua Wang, Bao-Long Shen
Summary: This study reveals a distinct fl-relaxation behavior and excellent plasticity in FeNi-based BMGs, which is attributed to the structural heterogeneity playing a key role in their dynamics, leading to a large amount of loosely packed regions. The pronounced fl-relaxation is also found to have a good correlation with the plasticity for the FeNi-based BMGs, providing potential guidance for the development of plastic BMGs from an atomic structural and glass dynamic perspective.
Article
Materials Science, Multidisciplinary
A. Moreno-Gobbi, P. S. Silva Jr, A. Maso, P. W. B. Marques, O. Florencio, L. G. Sarasua
Summary: The study found that the local amorphous structure of the Cu47.5Zr45.5Al5Er2 amorphous alloy gradually evolved into locally ordered structures during consecutive cryogenic thermal cycles and ultrasonic wave cycles. Additionally, after maintaining the sample stress-free at room temperature for a week, the ultrasonic response of the sample fully recovered to its initial state.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Roman Svoboda, Jan Prikryl, Pavel Provotorov, Alexander V. Kolobov, Milos Krbal
Summary: Crystal growth in 1 μm Se(1-y)Tey thin films on different substrates was investigated using direct joint microscopic and calorimetric measurements. The crystal growth rate varied depending on the substrate, which may be attributed to differences in thermal expansion coefficients and ion diffusion. Furthermore, the activation energies of crystal growth were consistent across different measurement techniques and sample forms.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Materials Science, Ceramics
Shenghan Zhou, Zhijian Xu, Tao Tang, Kaiyao Zha, Tong Ye, Dandan Dong, Chuang Dong
Summary: This study interprets the three eutectic compositions in the Cu-Zr system and their glass-forming mechanisms using a dual-cluster model.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Physical
Wook Ha Ryu, Chae Woo Ryu, Min Kyung Kwak, Eun Soo Park
Summary: This study provides practical guidelines for tailoring the thermoplastic forming (TPF) process in bulk metallic glasses (BMGs) and investigates the influence of process variables. A continuous heating transformation (CHT) diagram was constructed for LM1b (Zr44Ti11Cu10Ni10Be25) using Flash-DSC measurement, and three TPF procedures from bulk to nano scales were demonstrated. A new TPF parameter, P, was proposed to compare the TPF ability of different BMGs. These results enable the selection of suitable BMGs and optimization of TPF processes, leading to improved performance and expanded applications in various industries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Z. Mitrinova, M. Chenkova, N. Denkov, S. Tcholakova
Summary: The effect of different types of surfactants with varying chain lengths on the surface properties of a mixed solution of SLES and CAPB was studied. It was found that the addition of longer cosurfactant chains decreases the surface tension of the solution. Nonionic surfactants showed a particularly deep minimum in dynamic surface tension. The addition of anionic surfactants did not affect the dynamic and equilibrium surface tensions of the solution. A strong correlation was established between the dynamic surface tension and the viscosity of the concentrated solution for nonionic surfactants.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Nanoscience & Nanotechnology
Ziyun Long, Pingjun Tao, Liwei Kong, Guotai Wang, Shengkai Huang, Shenghua Wen, Huajie He, Zhenghua Huang, Xuguang Zhu, Xi Xu, Huanhuan Deng, Yuanzheng Yang
Summary: This article investigates the effects of cryogenic thermal cycling on the microstructure and plasticity of Zr60Cu20Al10Ni10 bulk metallic glass. The heterogeneity of the internal structure of the cryogenic thermal cycling-treated samples increases the energy state and introduces more flow defects, resulting in an improved room-temperature plasticity of Zr-based BMGs. This phenomenon indicates a more frequent generation of shear transition zones and shear band movement within them.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Xiaojun Sun, Jie He, Dunbo Yu, Yang Luo, Zilong Wang, Yuanfei Yang
Summary: This work investigates the relationship between structural heterogeneity and serrated flow in nanoscale phase separated Zr-Cu-Fe-Al bulk metallic glasses with different plasticity. The results show that as the atomic ratio of Cu to Fe increases, serration dynamics transform from a chaotic state to a self-organized critical state. This transformation is attributed to the increase in structural heterogeneity, which promotes the formation of multiple shear bands.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
M. V. Sukhanov, A. P. Velmuzhov, L. A. Ketkova, P. A. Otopkova, I. I. Evdokimov, A. E. Kurganova, V. S. Shiryaev, B. I. Denker, B. I. Galagan, V. V. Koltashev, V. G. Plotnichenko, S. E. Sverchkov
Summary: A method for preparing high purity rare earth elements (REEs) doped chalcogenide glasses by combining reactive distillation and chemical vapor transport under high vacuum conditions is proposed. The technique was successfully tested in the preparation of Ga5Ge20Sb10Se65 glass doped with Ce, Pr, Nd, Tb, and Dy. The high purity level of the doped glasses allowed for reproducible laser generation power in the 4.5-5.9 μm range in both bulk samples and optical fibers at room temperature.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Keita Nomoto, Bosong Li, Christoph Gammer, Anna Ceguerra, Huma Bilal, Anton Hohenwarter, Jurgen Eckert, Bernd Gludovatz, Simon P. Ringer, Jamie J. Kruzic
Summary: This study uses nanobeam electron diffraction to reveal the structural changes that occur after deformation in two Zr-based bulk metallic glasses (BMGs). The findings show that heavy deformation leads to an increase in the size of fcc-like medium-range order (MRO) clusters, resulting in local softening of the BMGs.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Physics, Multidisciplinary
Anna Panagopoulou, Cristian Rodriguez-Tinoco, Ronald P. White, Jane E. G. Lipson, Simone Napolitano
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Multidisciplinary
A. Vila-Costa, J. Rafols-Ribe, M. Gonzalez-Silveira, A. F. Lopeandia, Ll. Abad-Munoz, J. Rodriguez-Viejo
PHYSICAL REVIEW LETTERS
(2020)
Article
Polymer Science
Cristian Rodriguez-Tinoco, David Nieto Simavilla, Rodney D. Priestley, Michael Wuebbenhorst, Simone Napolitano
Article
Chemistry, Multidisciplinary
Julio Cesar Martinez-Garcia, Alexandre Serraima-Ferrer, Aitor Lopeandia-Fernandez, Marco Lattuada, Janak Sapkota, Javier Rodriguez-Viejo
Summary: This study predicts the effective mechanical reinforcement of polymeric nanocomposites using a generalized three-phase-series-parallel model considering percolation and the interfacial glassy region. The research demonstrates that the nanometer range glassy interphase between filler and matrix should be considered in interpreting enhanced mechanical properties. Experimental results fitted with theoretical predictions show good agreement, suggesting potential for creating new materials with fundamental technological applications.
Review
Physics, Multidisciplinary
Cristian Rodriguez-Tinoco, Marta Gonzalez-Silveira, Miguel Angel Ramos, Javier Rodriguez-Viejo
Summary: This review article summarizes the latest research progress of ultrastable glasses, including equilibrium mechanisms, liquid state transformation, and low temperature properties. The article also provides a list of properties for all materials known to form stable glasses.
RIVISTA DEL NUOVO CIMENTO
(2022)
Article
Multidisciplinary Sciences
Zijian Song, Cristian Rodriguez-Tinoco, Allen Mathew, Simone Napolitano
Summary: This study identifies a molecular process known as Slow Mode (SAP) that is universally observed in liquid dynamics of thin films and is closely connected to high-temperature flow. The findings suggest that measurements of liquid dynamics can be used to predict the equilibration rate in the glassy state.
Article
Physics, Multidisciplinary
Ana Vila-Costa, Marta Gonzalez-Silveira, Cristian Rodriguez-Tinoco, Marta Rodriguez-Lopez, Javier Rodriguez-Viejo
Summary: The traditional understanding of the glass transition is challenged by experiments showing that isolated regions of liquid can form within the glassy matrix. The nature of the glass transition depends on the ratio between the relaxation time of the glass and the alpha relaxation time of the equilibrated liquid. At high ratios, high-mobility regions transition directly into the equilibrated liquid, while at low ratios, the glass transition occurs through cooperative relaxation dynamics throughout the material.
Article
Physics, Multidisciplinary
Marta Ruiz-Ruiz, Ana Vila-Costa, Tapas Bar, Cristian Rodriguez-Tinoco, Marta Gonzalez-Silveira, Jose Antonio Plaza, Jorge Alcala, Jordi Fraxedas, Javier Rodriguez-Viejo
Summary: A spatio-temporal map of the relaxation dynamics of a highly stable glass into its supercooled liquid is built using real-time atomic force microscopy imaging. This methodology enables direct visualization of the liquid phase progression and the presence of localized fast mobility regions separated by giant length scales. A clear correlation between dynamic length and time scales in glasses is established. This approach may also be applicable to unveil the microscopic structure and dynamics of other glass-forming systems with much shorter length and time scales, including liquid-cooled glasses.
Article
Physics, Multidisciplinary
Manuel Moratalla, Marta Rodriguez-Lopez, Cristian Rodriguez-Tinoco, Javier Rodriguez-Viejo, Rafael J. Jimenez-Rioboo, Miguel A. Ramos
Summary: Recent findings of structural glasses with extremely high stability have raised questions about the persistence of low-temperature glassy anomalies. By studying a specific type of ultrastable glass, it is shown that the suppression of two-level systems in glasses depends on the degree of stability, not on anisotropy.
COMMUNICATIONS PHYSICS
(2023)
