Article
Multidisciplinary Sciences
Lai-Quan Shen, Ji-Hao Yu, Xiao-Chang Tang, Bao-An Sun, Yan-Hui Liu, Hai-Yang Bai, Wei-Hua Wang
Summary: The study provides experimental evidence that confirms the role of cavitation mechanism in glass fracture, revealing that self-organized nucleation, growth, and coalescence of nanocavities lead to the appearance of nanopatterns on fracture surfaces. This confirms the presence of nanoscale ductility in fracture of nominally brittle glasses.
Article
Physics, Fluids & Plasmas
Jason Ogbebor, John J. Valenza, Peter I. Ravikovitch, Ashoka Karunarathne, Giovanni Muraro, Maxim Lebedev, Boris Gurevich, Alexei F. Khalizov, Gennady Y. Gor
Summary: By conducting water sorption experiments on two nanoporous glass samples and simultaneously measuring the speed of ultrasonic waves, we investigated the effect of nanoconfinement on water compressibility. The analysis showed that confined water has a higher bulk modulus than bulk water at the same temperature, and the modulus has a linear dependence on the Laplace pressure. The results for water agree with previous data for nonpolar fluids, indicating that confined fluids are stiffer than bulk fluids regardless of intermolecular forces. Taking into account fluid stiffening in nanopores is important for accurate interpretation of wave propagation measurements in fluid-filled nanoporous media.
Article
Chemistry, Multidisciplinary
Beining Li, Zhenjiang Li, Ido Cooperstein, Wenze Shan, Shuaipeng Wang, Benxue Jiang, Long Zhang, Shlomo Magdassi, Jin He
Summary: This study presents a high-resolution 3D printing method for transparent nanoporous glass, combining transparent photo-curable sol-gel printing compositions with digital light processing (DLP) technology. Multi-component glass with complex shapes, high spatial resolutions, and multi-oxide chemical compositions are successfully fabricated using DLP printing and subsequent sintering process. The printed glass objects exhibit high transmittance and can be easily functionalized for various applications.
Article
Geosciences, Multidisciplinary
Zhixing Yi, Shouzhi Hu, Songtao Wu, Jingsheng Ma, Jian Gao, Yahui Yuan
Summary: Most pore network models designed for sandstone may not be applicable for shale due to the presence of nanopores and non-Darcy effects. A new pore network model accounting for these effects was proposed, providing a more accurate solution for shale gas flow simulations. Experiments on a shale sample showed differences in network structures between the new model (APN) and traditional models (IPN).
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Chemistry, Physical
Felix Meixner, Mohammad Reza Ahmadi, Christof Sommitsch
Summary: Physics-based models are helpful in developing new materials for more efficient power plants in fossil fueled electricity generation. This study develops a model based on classical nucleation theory and diffusion driven growth to predict the shape and distribution of cavities that occur mainly at grain boundaries during high temperature creep. The model's results are validated against experimental specimens and show good agreement, although it fails to represent the complex interlinking of cavities during tertiary creep.
Review
Biochemistry & Molecular Biology
Sylwia Glowniak, Barbara Szczesniak, Jerzy Choma, Mietek Jaroniec
Summary: Ultrasounds are commonly used for medical imaging, solution homogenization, navigation, and ranging. They are also a great energy source for chemical reactions. Sonochemistry utilizes ultrasounds to achieve energy savings and greener reactions with reduced reaction time, water as a solvent, and better product yields. Sonochemical methods have been successfully employed for the synthesis of various nanoporous materials, which have shown promising applications in gas adsorption, water treatment, catalysis, and energy storage.
Article
Nanoscience & Nanotechnology
Chang Liu, Suyue Yuan, Paulo S. Branicio
Summary: Bicontinuous nanoporous metallic glasses combine the advantages of MGs and open-cell nanoporous materials. Molecular dynamics simulations of a bicontinuous nanoporous Cu64Zr36 MG with 55% porosity and 4.4 nm ligament size show anomalous mechanical behavior and the ability to effectively delocalize strain localization in MGs. This design may have potential applications in catalysis, sensors, and lightweight structural designs.
SCRIPTA MATERIALIA
(2021)
Article
Chemistry, Physical
Nicholas J. Corrente, Elizabeth L. Hinks, Aastha Kasera, Raleigh Gough, Peter I. Ravikovitch, Alexander V. Neimark
Summary: This study explores the capabilities of 3D molecular models of disordered carbon structures to reproduce the morphological and adsorption features of practical adsorbents. By using grand canonical Monte Carlo simulations, the researchers were able to construct adsorption isotherms and demonstrated outstanding agreement between the simulated and experimental results. The correlations with experiments are truly amazing, considering the inherent variability of structural properties of commercial carbons and the diverse sources of experimental data in the literature.
Article
Materials Science, Multidisciplinary
Chang Liu, Suyue Yuan, Jinwoo Im, Felipe P. J. de Barros, Sami F. Masri, Paulo S. Branicio
Summary: Molecular dynamics simulations are used to investigate the mechanical properties of nanoporous CuxZr1-x metallic glasses. The study reveals a strong correlation between Young's modulus, Ultimate Tensile Strength (UTS), and porosity/composition. Increasing porosity leads to a change in nanoporous topology and a transition from brittle to ductile deformation and failure mechanisms. Genetic Programming (GP) is employed to establish scaling laws for E and UTS as a function of porosity and composition, accurately predicting their values in the entire range considered.
Article
Energy & Fuels
Chengwei Wang, Yuliang Su, Wendong Wang, Lei Li, Lipeng Zhang, Tianxiang Wang
Summary: The water lock phenomenon in tight sandstone gas reservoirs has a significant impact on gas well productivity. Understanding the mechanism of water lock damage is important for improving productivity. This study investigates the pore structure characteristics and water lock effect in tight sandstone reservoirs. A productivity equation is developed, considering slippage, stress sensitivity, and the water lock effect. The study also explores the reservoir flow law and its impact on productivity. Experimental results show that introducing chemicals into the formation is an effective method for repairing water lock damage.
Article
Optics
A. O. Rybaltovsky, E. O. Epifanov, V. N. Sigaev, S. S. Fedotov, V. I. Yusupov, N. V. Minaev
Summary: This paper presents the results of studying the process of laser formation of microstructures from silver nanoparticles in nanoporous quartz glasses. It was found that the formation of microstructures occurs due to photo- and thermal decomposition of precursor molecules with the formation of plasmonic silver nanoparticles. The developed temperatures can exceed the melting point of glass, which leads to the appearance of microstructures with altered refractive index.
Article
Chemistry, Multidisciplinary
Elizabeth Barsotti, Mohammad Piri
Summary: The research indicates that the absence of clear capillary condensation in the isotherms of most naturally occurring nanoporous media is due to the broad pore size distribution of the materials. By mixing different sizes of adsorbents, it was found that the phase behavior in different pore sizes is additive, suppressing the appearance of capillary condensation. By comparing isotherms of mixtures to those of single pore sizes, correlations using the Lorentzian function were developed to determine porosity and fluid density straightforwardly.
Review
Engineering, Mechanical
Yan Chen, Lanhong Dai
Summary: Metallic glasses are a promising class of materials with excellent mechanical properties, but their brittle failure at room temperature and complicated fracture behavior make their applications limited. Recent studies have made significant progress in understanding the failure behavior of metallic glasses, including the discovery of fracture mechanisms and the establishment of failure criteria. However, there are still outstanding issues that need to be further clarified.
ACTA MECHANICA SINICA
(2022)
Article
Materials Science, Ceramics
Jiejie Li, Xiaodan Hu, Yuhang Zhang, Chenyao Tian, Guoming Hu, Sheng Liu, Re Xia
Summary: The study investigates the tensile response of Cu50Zr50 metallic glasses with 3D gyroidal structure using molecular dynamics simulations, revealing that designing nanoporous structures can enhance the strength and ductility of metallic glasses. The findings suggest a design strategy to achieve concurrent high strength and ductility in metallic glasses by designing 3D nanoporous structures with supra-nano size.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Engineering, Environmental
Nikolaos Kostoglou, Christian Koczwara, Sebastian Stock, Christos Tampaxis, Georgia Charalambopoulou, Theodore Steriotis, Oskar Paris, Claus Rebholz, Christian Mitterer
Summary: The study investigates the potential applications of a nanoporous polymer-/polyaniline-derived activated carbon (PDAC) in hydrogen storage and supercapacitor energy storage. The PDAC demonstrates superior hydrogen adsorption performance and supercapacitor cell performance compared to conventional commercial activated carbon, attributed to the smaller pore sizes of the PDAC structure.
CHEMICAL ENGINEERING JOURNAL
(2022)