Article
Energy & Fuels
Zizhong Liu, Hamid Emami-Meybodi
Summary: We propose a mathematical model to simulate one-dimensional gas transport in organic-rich nanoporous media with nonequilibrium sorption. The model considers Knudsen diffusion, viscous flow, and surface diffusion in different phases, and is validated using experimental data. The results show the significance of nonequilibrium sorption and the impact of sorbed-phase volume on mass transport. Surface diffusion dominates in systems with high adsorption affinity, while the sorbed phase contributes significantly to mass transport at high pressures in systems with lower adsorption affinity. Neglecting the sorbed-phase volume may lead to overestimation of the effective free-phase diffusion coefficient.
Article
Nanoscience & Nanotechnology
Yubo Bian, Yuhua Dong, Jiande Liu, Youmei Sun, Jinglai Duan, Jie Liu, Huijun Yao
Summary: By preparing the conical nanoporous polyimide (CNPI) membrane through ion irradiation and asymmetric chemical etching, and spin-coating the graphene oxide membrane (GOM) on it, the ionic rectification effect and ion conductivity can be significantly improved.
ACS APPLIED NANO MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Yaxiong Cheng, Yuhua Dong, Qinggang Huang, Kejing Huang, Shuangbao Lyu, Yonghui Chen, Jinglai Duan, Dan Mo, Youmei Sun, Jie Liu, Yong Peng, Huijun Yao
Summary: A convenient method is reported to introduce ionic selective channels in micron-thick polycarbonate membranes through swift heavy ion irradiation, UV sensitization, and pulsed-electrical etching, tuning the characteristic dimensions of the channels for subnanoporous membranes with excellent ionic separation and sieving properties. The study found that the transmembrane conduction of multivalent ions was suppressed compared to monovalent ions until the size of the membrane channel matched the hydrated diameter of multivalent ions, showing high selectivity for various ions and channel diameters.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Chemical
Shuhang Wu, Yaxiong Cheng, Jie Ma, Qinggang Huang, Yuhua Dong, Jinglai Duan, Dan Mo, Youmei Sun, Jie Liu, Huijun Yao
Summary: A study presents a green and convenient method to prepare sub-nanoporous PES membrane with highly aligned channels, which can be facilely regulated at subnanoscale by adjusting membrane's UV sensitization time for tailor-made membrane design. The membrane exhibits excellent ion-exchange performance in electrodialysis ion separation, with high separation ratio and transport rate. The strong chemical and electrochemical tolerances of the sub-nanoporous PES membrane are essential for future applications.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Physical
Dominika Lesnicki, Chloe Y. Gao, David T. Limmer, Benjamin Rotenberg
Summary: This study investigates the dynamic and static correlations contributing to electric field-dependent ionic conductivity in electrolyte solutions using response theory and nonequilibrium ensemble reweighting. It is found that increased ion correlations under certain conditions result in insensitivity of the conductivity to the field.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Physics, Applied
Biyuan Liu, Le Zhou, Yixiang Wang, Shaobin Zhuo, Yanguang Zhou, Jinglei Yang, Zhigang Li
Summary: In this study, the diffusion of LiCl electrolytes in 3D-nanoporous graphene structures (3D-NGSs) was investigated using molecular dynamics simulations. The diffusion coefficients of water, Li+, and Cl- were calculated in 3D-NGSs with different LiCl concentrations, porosities, and surface charge densities. The results showed that the diffusion coefficients followed the Arrhenius Equation and power laws for the dependence on temperature and porosity, respectively. They decreased with increasing salt concentration.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Juergen Caro
Summary: By understanding the molecular interplay of diffusion and adsorption, new membrane materials can be developed and gas separation membrane operational conditions can be optimized. Surprisingly accurate transport or Fickian diffusion coefficientsD(T) can be derived from membrane permeation studies, estimating gas transport through novel nanoporous materials.
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
(2021)
Article
Energy & Fuels
Xiaoci Ni, Guangyu Dong, Liguang Li, Qingfeng Yang, Zhijun Wu
Summary: The main obstacle for the large-scale application of ion sensing technology on mass-produced engines is the low signal to noise ratio of the ion current signal. By studying the ion current formatting process and the electron transport behavior in flames, the accuracy and effectiveness of ion signals have been improved. A multi-physics CFD model was used to investigate the electron-ion diffusion process in order to predict the ion current signal characteristics under different diluting conditions.
Article
Multidisciplinary Sciences
Young Joo Lee, Lihua Chen, Janhavi Nistane, Hye Youn Jang, Dylan J. J. Weber, Joseph K. K. Scott, Neel D. D. Rangnekar, Bennett D. D. Marshall, Wenjun Li, J. R. Johnson, Nicholas C. C. Bruno, M. G. Finn, Rampi Ramprasad, Ryan P. P. Lively
Summary: Membrane-based organic solvent separations are being developed as a promising technology for enhancing energy efficiency. The authors combine machine learning algorithms and transport simulations to predict the separation of complex mixtures by polymer membranes. Experimental results show a high accuracy of 93-94% in predicting the separation of crude oils. This approach allows for rapid screening of polymer membranes for liquid mixture separations.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Zhenghui Fang, Yuhua Dong, Zaichao Guo, Zhuo Zhao, Zhenhua Zhang, Zhihao Liang, Huijun Yao
Summary: This article reviews the recent progress in harvesting salinity gradient energy with reverse electrodialysis (RED) membrane. The mechanism of RED, suitable materials, and the influence of solution conditions on RED performance are discussed. The theoretical and experimental conditions required for practical application are also explored. Large-scale production and anti-fouling for long-term running of RED membranes are identified as key issues to be solved.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Physics, Multidisciplinary
F. Chu, A. L. LaJoie, B. D. Keenan, L. Webster, S. J. Langendorf, M. A. Gilmore
Summary: Collisional plasma shocks generated from supersonic flows are an important feature in many astrophysical and laboratory high-energy-density plasmas. Plasma shock fronts with multiple ion species contain additional structure, including interspecies ion separation driven by gradients in species concentration, temperature, pressure, and electric potential. Time-resolved density and temperature measurements of two ion species in collisional plasma shocks produced by head-on merging of supersonic plasma jets provide the first experimental validation of the fundamental inter-ion-species transport theory. The temperature separation, a higher-order effect reported here, is valuable for advancements in modeling HED and ICF experiments.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Physical
Yuhao Hu, Yunfei Teng, Yue Sun, Pei Liu, Lin Fu, Linsen Yang, Xiang-Yu Kong, Qiang Zhao, Lei Jiang, Liping Wen
Summary: The research team has developed a bioinspired three-dimensional porous membrane with high chemical stability and interconnected nanostructure, which can efficiently convert osmotic energy from different resources. This membrane can recover energy from seawater and riverwater, organic solvents, and the processing of spent batteries, potentially making a breakthrough in practical applications in membrane technology.
Article
Chemistry, Analytical
Gijung Kim, Min Chul Park, Seonae Jang, Daeyoung Han, Hojun Kim, Wonjune Kim, Honggu Chun, Sunghoon Kim
Summary: This study presents a method for stress-free separation of EVs based on diffusion through a nanoporous membrane chip, showing selective separation of EVs in cell culture media and human serum. Compared to ultracentrifuge-based separation, this method demonstrated a high yield of EVs in human serum.
Article
Chemistry, Analytical
Camille Malburet, Laurent Leclercq, Jean-Francois Cotte, Jerome Thiebaud, Sergio Marco, Marie-Claire Nicolai, Herve Cottet
Summary: In this study, Taylor dispersion analysis (TDA) was used to characterize the interactions between a polymeric adjuvant (poly(acrylic acid), SPA09) and a vaccine antigen for Staphylococcus aureus. TDA allowed rapid determination of complex sizes and free antigen percentage, as well as interaction parameters. The results were compared with transmission electron microscopy and previous capillary electrophoresis analysis.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Yahui Wang, Hongfang Zhang
Summary: Exosome is a potential biomarker for tumor diagnosis. An electrochemical aptasensor for exosome detection was developed using a sandwich-structured nanoporous membrane. The specific probes on one side of the membrane captured the tumor-derived exosomes, while the other side allowed for electrochemical detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Multidisciplinary
A. Silvia Gonzalez, Angela Riego, Victor Vega, Javier Garcia, Serena Galie, Ignacio Gutierrez del Rio, Maria del Valle Martinez de Yuso, Claudio Jesus Villar, Felipe Lombo, Victor Manuel De la Prida
Summary: The study demonstrated the performance of antimicrobial coatings on 316L stainless steel pipelines, fabricated using electrochemical techniques and surface modification processes. The incorporation of additional coatings with antimicrobial properties on a nanostructured substrate showed highly efficient antimicrobial features, particularly with an association of TiO2 layer and Ag nanoparticle coatings.
Article
Chemistry, Physical
Ana Silvia Gonzalez, Victor Vega, Ana Laura Cuevas, Maria del Valle Martinez de Yuso, Victor M. Prida, Juana Benavente
Summary: ALD of SiO2 from APTES and O-3 on nanoporous alumina can affect pore size, introduce surface differences, and impact interfacial effects and optical properties.
Article
Chemistry, Multidisciplinary
Javier Garcia, Alejandro M. Manterola, Miguel Mendez, Jose Angel Fernandez-Roldan, Victor Vega, Silvia Gonzalez, Victor M. Prida
Summary: Research on nanowires and nanotubes forming complex structures is relatively scarce, but these structures have specific applications in sensing, high-density magnetic data storage, photonics, and spintronics. To gain a deeper understanding of the magnetic properties exhibited by these nanostructures, complex systems are being fabricated by altering their dimensions or composition to explore magnetization reversal processes and control of magnetic domain walls.
Article
Chemistry, Multidisciplinary
Javier Garcia, Jose A. Fernandez-Roldan, Roque Gonzalez, Miguel Mendez, Cristina Bran, Victor Vega, Silvia Gonzalez, Manuel Vazquez, Victor M. Prida
Summary: Magnetic nanomaterials are being explored for various applications, with the modulation of nanostructures showing potential for affecting magnetization reversal dynamics. In the case of diameter modulated Fe67Co33 nanowires, the magnetization reversal process is observed to occur in two distinct steps. This behavior is attributed to micromagnetic modeling, where the wide segment of the nanowire reverses magnetization first, followed by the core and narrow segment simultaneously.
Article
Chemistry, Multidisciplinary
Luis C. C. Arzuza, Victor Vega, Victor M. Prida, Karoline O. Moura, Kleber R. Pirota, Fanny Beron
Summary: Geometrically modulated magnetic nanowires can modify the domain wall propagation, but may be interfered in dense systems, and the magnetic behavior depends on the length/diameter aspect ratio, with magnetization reversal governed by local radial stray fields.
Article
Materials Science, Multidisciplinary
V. Vega, V. M. Prida, B. Hernando, M. Ipatov, A. Chizhik, V Zhukova, A. Zhukov, L. Dominguez, J. Gonzalez
Summary: The influence of a ferromagnetic cover layer on the giant magnetoimpedance (GMI) effect in nearly-zero magnetostrictive Co66.5Fe3.5Si12.0B18.0 amorphous ribbon has been studied, with findings indicating a significant impact of the cover layer, particularly at high frequencies. A comparison of GMI responses between the coated and as-cast ribbons revealed a more pronounced double peaks dependence in the coated ribbon at 10-100 MHz.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
M. Varga, L. Galdun, B. Kunca, V. Vega, J. Garcia, V. M. Prida, E. D. Barriga-Castro, C. Luna, P. Diko, K. Saksl, R. Varga
Summary: This study presents the magnetic characterization of ferromagnetic Ni-Fe-Ga shape memory nanowires using temperature-dependent FORC analysis. The FORC analysis confirms the uniform and homogeneous nature of the nanowires array and supports the ferromagnetic shape memory behavior and structural transformation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Editorial Material
Chemistry, Multidisciplinary
Javier Garcia Fernandez, Victor Vega Martinez, Victor Manuel de la Prida Pidal
Article
Biochemistry & Molecular Biology
Javier Garcia, Ruth Gutierrez, Ana S. Gonzalez, Ana I. Jimenez-Ramirez, Yolanda Alvarez, Victor Vega, Heiko Reith, Karin Leistner, Carlos Luna, Kornelius Nielsch, Victor M. Prida
Summary: Tuning and controlling the magnetic properties of nanomaterials is crucial for implementing new technologies. In this study, core/shell Ni@(NiO, Ni(OH)2) nanowire arrays were fabricated using an electrochemical approach, and their magnetic properties were characterized. The results showed surface oxidation-induced magnetic hardening in the nanowires and an increasing exchange bias effect at low temperatures.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Analytical
Ana Laura Cuevas, Victor Vega, Antonia Dominguez, Ana Silvia Gonzalez, Victor M. Prida, Juana Benavente
Summary: Optical characterization of nanoporous alumina-based structures was performed using spectroscopic ellipsometry and photoluminescence spectra. The results showed the dependence of refractive index and extinction coefficient on wavelength, as well as the influence of sample geometry and cover-layer material. Photoluminescence curves exhibited similar shapes but different intensity values. This study highlights the potential applications of these structures in nanophotonics, optical sensing, or biosensing.
Article
Chemistry, Multidisciplinary
Ana Silvia Gonzalez, Javier Garcia, Victor Vega, Rafael Caballero Flores, Victor M. Prida
Summary: In this study, a novel 3D nanostructured silver electrode was designed and its chemical surface and electrochemical properties were investigated. The electrode exhibited high capacitance retention, Coulombic efficiency, and cycle stability, making it suitable for applications in micro-supercapacitors or electrochemical devices.
Article
Materials Science, Multidisciplinary
Falk Muench, Sandra Schaefer, Miguel Mendez, Jose Angel Fernandez-Roldan, A. Silvia Gonzalez-Garcia, Victor Vega, Ulrike Kunz, Wolfgang Ensinger, Javier Garcia, Victor M. Prida
Summary: The properties and potential applications of three-dimensional ferromagnetic nanotubes have received a lot of attention. However, there have been limited studies on ferromagnetic nanotubes, especially those with irregular cross-sections. In this study, we introduce a synthetic platform for creating novel ferromagnetic nanotubes with diamond-shaped cross-sections and high aspect ratios. The nanotubes were plated using an electroless-plating deposition method, which allowed precise control over their geometry.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)