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engineering hydrogen-bonded organic frameworks: Pioneering membrane materials for advanced separation

Separation and Purification Technology 2025年 370卷

作者： Elboughdiri, Noureddine Kriaa, Karim Maatki, Chemseddine Fatimah, Siti Chaouiki, Abdelkarim Chafiq, Maryam Ko, Young Gun Chemical Engineering Department College of Engineering University of Ha'il P.O. Box 2440 Ha'il81441 Saudi Arabia Riyadh11432 Saudi Arabia Riyadh11432 Saudi Arabia Integrated Materials Chemistry Laboratory School of Materials Science and Engineering Yeungnam University Gyeongsan38541 Cuba Chemistry Program Universitas Pendidikan Indonesia Bandung40154 Indonesia

Hydrogen-bonded organic frameworks (HOFs) are a class of crystalline porous materials that are primarily synthesized through the self-assembly of organic or metal–organic building blocks via intermolecular hydrogen bonding interactions. These materials have garnered significant attention for their potential in low-carbon, energy-efficient separation processes, particularly in the areas of adsorption and membrane separation. The inherent capability of HOFs for solution processing further enhances their versatility, allowing for the fabrication of adsorbents and membranes with tailored microstructures that can be fine-tuned to meet specific separation requirements. Recent advancements in HOF-based membranes have focused on innovative strategies for material preparation, including the selection of suitable building blocks, the optimization of synthesis conditions, and the development of new classification techniques. In this context, a comprehensive analysis of recent advancements in the design and synthesis of HOF-based membranes, emphasizing novel material engineering strategies has been discussed. Furthermore, the potential of HOF-based membranes, governed by their physicochemical properties and hierarchical self-assembly, is systematically examined in this review. Finally, the challenges and future prospects of HOF-based membranes are systematically analyzed, with a focus on structural stability, performance optimization, and advanced functionalization strategies to enhance their high-precision applicability in high-precision separation. © 2025 Elsevier B.V.

关键词： Self assembly

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Lightweight and high-performance carbon nanotube fabrics for electromagnetic interference shielding

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science China materials 2025年第6期68卷 2071-2078页

作者： Jiang, Hongyu Sun, Hongji Zhang, Songlin Chen, Peining Peng, Huisheng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Institute of Fiber Materials and Devices and Laboratory of Advanced Materials Fudan University Shanghai200438 China

Electromagnetic interference (EMI) shielding materials play a crucial role in safeguarding electronic devices from external interference, ensuring their stable operation. Despite their effectiveness, traditional metallic EMI shielding materials face significant limits, such as high weight density, rigidity, and limited adaptability to complex circuitry. In this study, a lightweight, flexible carbon nanotube (CNT) fabric with superior EMI shielding performance was developed through the scalable preparation of CNT fibers and knitting of CNT yarns. The CNT fibers demonstrated excellent specific tensile strength (25.3 cN/dtex) and high electrical conductivity (3634.2 ± 114.0 S/cm). The resulting CNT fabric achieved an EMI shielding effectiveness of 66.8 dB for a single layer and 111 dB for multiple layers while maintaining an ultralow density of 0.2 g/cm3. Additionally, the CNT fabric was durable to withstand repeated bending and washing. When applied as the EMI shielding layer in coaxial cables, the CNT fabric delivered comparable signal transmission performance to that of copper while reducing the mass of the shielding layer by 32.1%. These comprehensive properties position CNT fabric as a promising alternative to conventional metal-based shielding materials, with broad application potential in aerospace, electronics, and related fields. © science China Press 2025.

关键词： Knit fabrics

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Mechanical Analysis of Lithium-Ion Batteries Via Acoustic Impedance Spectroscopy

ACS Electrochemistry

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ACS Electrochemistry 2025年第4期1卷 516-522页

作者： Charles Soulen Stewart Sherrit Erik Brandon Ping Liu Program of Materials Science and Engineering University of California San Diego 9500 Gilman Drive La Jolla California 92093 United States Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Drive Pasadena California 91109 United States Program of Materials Science and Engineering University of California San Diego 9500 Gilman Drive La Jolla California 92093 United States；Aiiso Yufeng Li Department of Chemical and Nano Engineering University of California San Diego 9500 Gilman Drive La Jolla California 92093 United States

The mechanical properties of lithium-ion batteries (LIB) are closely related to their state-of-charge (SOC) and state-of-health (SOH). Here, we introduce an in-operando acoustic technique based on acoustic impedance spectroscopy (AIS) which probes the mechanical changes that occur in the LIB during operation. Using thin, inexpensive piezoelectric resonators and widely available impedance analyzers, we can identify the acoustic resonances of commercial LIBs by measuring the complex electrical impedance of the resonator. In-operando AIS shows that these resonances are dependent on the bulk mechanical properties of the LIB, which change reversibly as the cell is cycled. We show that this technique can provide substantial information on both the SOC and SOH of a commercial LIB.

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A preliminary data fusion study to assess the feasibility of Foundation Process-Property Models in Laser Powder Bed Fusion

arXiv

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arXiv 2025年

作者： Vendrell-Gallart, Oriol Negarandeh, Nima Foumani, Zahra Zanjani Amiri, Mahsa Valdevit, Lorenzo Bostanabad, Ramin Department of Mechanical and Aerospace Engineering University of California IrvineCA92697 United States Materials and Manufacturing Technology Program University of California IrvineCA92697 United States Department of Materials Science and Engineering University of California IrvineCA92697 United States Department of Civil and Environmental Engineering University of California IrvineCA92697 United States

Foundation models are at the forefront of an increasing number of critical applications. In regards to technologies such as additive manufacturing (AM), these models have the potential to dramatically accelerate process optimization and, in turn, design of next generation materials. A major challenge that impedes the construction of foundation process-property models is data scarcity. To understand the impact of this challenge, and since foundation models rely on data fusion, in this work we conduct controlled experiments where we focus on the transferability of information across different material systems and properties. More specifically, we generate experimental datasets from 17-4 PH and 316L stainless steels (SSs) in Laser Powder Bed Fusion (LPBF) where we measure the effect of five process parameters on porosity and hardness. We then leverage Gaussian processes (GPs) for process-property modeling in various configurations to test if knowledge about one material system or property can be leveraged to build more accurate machine learning models for other material systems or properties. Through extensive cross-validation studies and probing the GPs’ interpretable hyperparameters, we study the intricate relation among data size and dimensionality, complexity of the process-property relations, noise, and characteristics of machine learning models. Our findings highlight the need for structured learning approaches that incorporate domain knowledge in building foundation process-property models rather than relying on uninformed data fusion in data-limited applications. © 2025, CC BY.

关键词： Data fusion

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Al–20Sn–1Cu self-lubricating alloy: Correlations between microstructure coarsening, mechanical, and application properties

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Journal of materials Research and Technology 2025年 36卷 7284-7303页

作者： Sarah De Albuquerque Vinicius Leme Andrade Rodrigo V. Reyes Guillaume Reinhart Danielle Cristina Camilo Magalhães Henri Nguyen-Thi José Eduardo Spinelli Aix Marseille Univ Université de Toulon CNRS IM2NP Marseille France Federal University of São Carlos Graduate Program in Materials Science and Engineering 13565-905 São Carlos SP Brazil Department of Materials Engineering Federal University of São Carlos 13565-905 São Carlos SP Brazil

This study investigated the microstructure, microhardness, tensile strength, and dry wear behavior of the cast Al–20Sn–1Cu alloy (wt. %), focusing on the relationship between β-Sn phase morphology and the results. The Al–Sn–Cu alloys have been shown to be promising for plain bearing applications due to their self-lubricating properties. However, those alloys exhibit peculiar behaviors contrary to the classical Archard equation, which relates hardness to wear resistance, or to the typical behavior of metallic alloys, where increasing strength generally leads to a reduction in ductility. This can be attributed to the morphology, fraction and distribution of the β-Sn phase, a component of low hardness and strength but essential for self-lubricating functionality. In this study, the Al–20Sn–1Cu alloy solidified under a wide range of cooling rates varying from 1.0 to 28.9 °C/s was investigated. Dendritic spacing was measured using an automated method proposed in this study. The results showed that more refined samples had better tensile properties but compromised wear behavior. When the microstructure was refined up to dendritic spacing of 15.7 μm, a good combination between strength and ductility was achieved: a tensile strength of 72 MPa and an elongation of 14 % were obtained. These results can be explained by the increased contact area between the α-Al and β-Sn phases, which favors a strain hardening mechanism. However, these samples have very small β-Sn particles, which are insufficient to form an effective lubricating layer, resulting in severe wear due to adhesion. Despite that, it achieved a lower wear coefficient compared to other self-lubricating alloys reported in the literature.

关键词： Al-alloys Self-lubricating alloys Solidification Microstructure Wear Mechanical properties

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Periodic phase diagrams in micromagnetics with an eigenvalue solver

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IEEE Transactions on Magnetics 2025年

作者： Ai, Fangzhou Lin, Zhuonan Duan, Jiawei Lomakin, Vitaliy University of California Department of Electrical and Computer Engineering San DiegoCA92093 United States University of California Center for Memory and Recording Research San DiegoCA92093 United States University of California Program in Materials Science and Engineering San Diego92093 United States

This work introduces an approach to compute periodic phase diagram of micromagnetic systems by solving a periodic linearized Landau-Lifshitz-Gilbert (LLG) equation using an eigenvalue solver with the Finite Element Method formalism. The linear operator in the eigenvalue problem is defined as a function of the periodic phase-shift wave vector. The dispersion diagrams are obtained by solving the eigenvalue problem for complex eigenfrequencies and corresponding eigenstates for a range of prescribed wave vectors. The presented approach incorporates a calculation of the periodic effective field, including the exchange and magnetostatic field components. The approach is general in that it allows 3D problems to be handled with any 1D, 2D, and 3D periodicities. The ability to calculate periodic diagrams provides insights into the spin wave propagation and localized resonances in complex micromagnetic structures. © 1965-2012 IEEE.

关键词： Spin waves

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Real-time monitoring method of microbial growth using a simple pressure-based respiration detection system

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Analytical Biochemistry 2025年 703卷

作者： Shin, Nara Oh, Jinok Han, Yebin Lim, Gaeun Joo, Jeong Chan Jeon, Woo-Young Ahn, Jungoh Kim, Hee Taek Bhatia, Shashi Kant Yang, Yung-Hun Advanced Materials Program Department of Biological Engineering College of Engineering Konkuk University Seoul Korea Republic of Department of Chemical Engineering Kyung Hee University Gyeonggi-do Korea Republic of Chungbuk Korea Republic of Department of Food Science and Technology Chungnam National University Daejeon Korea Republic of Institute for Ubiquitous Information Technology and Applications Konkuk University Seoul Korea Republic of

Dry cell weight (DCW) and optical density (OD) measurement methods provide useful data for assessing microbial growth. However, their sampling process is labor-intensive and time-consuming. Therefore, we aimed to evaluate a method for measuring microbial growth through continuous CO2 measurement under aerobic conditions using a pressure-based respiration detection system, which is traditionally used in anaerobic environments and applies measurement of reduced pressure by capturing CO2 with KOH. The pressure reduction rate, OD, and DCW values were compared during Ralstonia eutropha H16 culture, which revealed a correlation of R2 of 0.99 between the pressure reduction and DCW and a change of DCW (g/L) per pressure (1 mbar) of −0.02 g/L. It showed theoretical limit of detection at 14.67 mbar corresponding to 0.0428 g/L of DCW and theoretical limit of quantification at 48.9 mbar as lower limits. When the pressure-based method was applied to compare carbon source utilization and growth of different strains, such as E. coli sp., Pseudomonas sp., Burkholderia sp., and Bacillus sp., it showed a high correlation with DCW. Overall, these results demonstrate that the pressure-based respiration detection system is a reliable tool for microbial growth monitoring and offers significant advantages by providing real-time data with less labor. © 2025 Elsevier Inc.

关键词： Dry cell weight Microaerobic Optical density Pressure Respiration detection system

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Lambda Theta Reflectometry for protein biosensing 17

Lambda Theta Reflectometry for protein biosensing

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Frontiers in Biological Detection: From Nanosensors to Systems XVII 2025

作者： Klose, Alanna M. Katz, Joseph D. Boni, Robert Miller, Benjamin L. Department of Dermatology University of Rochester RochesterNY14627 United States Materials Science Program University of Rochester RochesterNY14627 United States Laboratory of Laser Energetics University of Rochester RochesterNY14627 United States Department of Biomedical Engineering University of Rochester RochesterNY14627 United States

ISBN: (纸本)9781510684249

Label-free reflectometry sensors detect proteins by measuring the reflectance properties of a thin film on a substrate. As light encounters a thin film layer stack, reflections from the layer boundaries interfere with each other encoding information about layer properties onto the reflected light. Existing reflectometric techniques measure changes in thin film thickness by observing a change in the interference spectrum, polarization state or reflectance relative to an initial antireflective condition at fixed angle and wavelength. These techniques are used for biosensing by detecting changes in film thickness as analyte binds to surface-bound ligand. Existing approaches are limited by low multiplexing capability, limited sensitivity, or by requiring high manufacturing tolerances of the detector substrates. Lambda Theta Reflectometry (LTR) is a novel reflectometric technique that measures changes in film thickness by measuring the location of null reflectivity as a function of wavelength (lambda) and angle of incidence (theta). The substrate is simultaneously illuminated with a range of angles and wavelengths and reflected light is angularly and spectrally resolved. The optical thickness of the thin film is retrieved by fitting the location of the null in lambda theta space. A prototype LTR reflectometer has demonstrated the ability to measure SiO2 layer thickness with milli-Ångstrom precision. LTR measurements of SiO2/Si oxide films are in excellent agreement with spectroscopic ellipsometry for films thickness ranging from 1390-1465 Å. LTR enables sensitive measurements across a range of analyte concentrations without requiring stringent control over initial layer stack thickness. © 2025 SPIE.

关键词： Ellipsometry

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Effect of double coating on microencapsulation of levofloxacin using the particles from gas-saturated solutions process as a controlled-release system

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Discover Chemistry 2025年第1期2卷 1-13页

作者： Sharmin, Tanjina Takeshita, Toshihiro Ouchi, Mikio Yoshida, Koji Znad, Hussein Saptoro, Agus Sarker, Zaidul Islam Irie, Keiichi Satho, Tomomitsu Nioh, Atsushi Masuda, Takaaki Muneyoshi, Yuuki Terayama, Suzuko Mishima, Kenji Department of Chemical Engineering Faculty of Engineering Fukuoka University Fukuoka Japan Research Institute of Composite Materials Fukuoka University Fukuoka Japan Resource Circulation Faculty of Environmental Engineering Fukuoka University Fukuoka Japan Faculty of Sciences Fukuoka University Fukuoka Japan Western Australian School of Mines: Minerals Energy and Chemical Engineering Faculty of Science and Engineering Curtin University Perth Australia Department of Chemical Engineering Faculty of Engineering Curtin Malaysia Graduate School Miri Sarawak Malaysia Department of State Program and Food Science Northern Marianas College Saipan USA Faculty of Pharmaceutical Sciences Fukuoka University Fukuoka Japan Yokohama Research Center Pola Chemical Industries Yokohama Japan

A novel double-coating technique was employed to encapsulate levofloxacin (LVF), a potent antibacterial drug, using the particles from gas-saturated solutions (PGSS) process to achieve extended release. The primary coating utilized glyceryl tristearate (GT), a lipid with a high melting point (72 °C), followed by a secondary coating with trimyristin (TM), a lipid with a lower melting point (52 °C). For comparison, a single-coating approach was also explored, using the biocompatible polymer poly-(ε-caprolactone) (PCL). The resulting particles were characterized for their shape, size, and LVF encapsulation efficiency, with confirmation of LVF entrapment provided by Fourier transform infrared (FTIR) spectroscopy, and X‐ray powder diffraction (XRD) analysis. The particles, with an average diameter of 95.3 ± 16.5 μm, exhibited an encapsulation efficiency of up to 92.1 ± 2.5%. Furthermore, in vitro release studies revealed that the double-coated microcapsules effectively suppressed the initial burst release and provided controlled, extended release of LVF (t30D = 36.3%), demonstrating the efficiency of this encapsulation method for prolonged drug delivery.

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Imaging the evolution of lithium-solid electrolyte interface using operando scanning electron microscopy

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Nature Communications 2025年第1期16卷 1-11页

作者： Zhao, Lihong Feng, Min Wu, Chaoshan Guo, Liqun Chen, Zhaoyang Risal, Samprash Ai, Qing Lou, Jun Fan, Zheng Qi, Yue Yao, Yan Department of Electrical and Computer Engineering and Texas Center for Superconductivity at the University of Houston University of Houston Houston TX United States School of Engineering Brown University Providence RI United States Materials Science and Engineering Program University of Houston Houston TX United States Department of Materials Science and Nanoengineering and the Rice Advanced Materials Institute Rice University Houston TX United States Department of Engineering Technology University of Houston Houston TX United States

The quality of Li–solid electrolyte interface is crucial for the performance of solid-state lithium metal batteries, particularly at low stack pressure, but its dynamics during cell operation remain poorly understood due to a lack of reliable operando characterization techniques. Here, we report the evolution of Li–electrolyte interface with high spatial resolution using operando scanning electron microscopy under realistic operating conditions. By tracking the stripping process of both Li and Li-rich Li-Mg alloy anodes, we show that multiple voids coalesce into a single gap and eventually delaminate the interface in Li, whereas the voids split and collapse to partially recover interfacial contact in Li-Mg. Density functional theory calculations show that the stronger Mg-S interaction at the metal–electrolyte interface attracts Mg toward the interface and repels Li-vacancies into the bulk, resulting in a reduced number of voids. The pressure-dependent voltage profiles of Li and Li-Mg stripping suggest that loss of contact due to void formation, rather than Mg accumulation at the interface, is the origin of high overpotential that limits the utilization of metal anodes. Improved interfacial contact enables stable cycling of all-solid-state lithium full cell at low stack pressure (1 MPa) and moderate rate (2 mA cm⁻²) simultaneously. The real-time visualization of Li–electrolyte interface dynamics provides critical insights into the rational design of solid-state battery interfaces. © The Author(s) 2025.

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