Article
Biochemical Research Methods
Doyel Pandey, Pranab Kumar Mondal, Somchai Wongwises
Summary: We propose a novel technique for efficient solute mixing at a microfluidic scale based on the induced charge electrokinetic (ICEK) phenomenon. By employing polarizable dielectric objects of different sizes and shapes instead of perfectly conducting polarizable objects, we demonstrate that vortices developed in the flow pathway adjacent to the polarizable dielectric blocks contribute to efficient mixing. Our work focuses on the influences of the physical properties and the arrangements of the polarizable dielectric blocks on the underlying mixing phenomena.
Article
Physics, Multidisciplinary
Florian Katzmeier, Bernhard Altaner, Jonathan List, Ulrich Gerland, Friedrich C. Simmel
Summary: Suspended microparticles can form stripe patterns perpendicular to the direction of an ac electrical field, which further develop into zigzag patterns. This phenomenon can be accurately simulated and predicted by second order electrokinetic flow, and can be observed with various types of particles.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Physical
S. Ahualli, S. Orozco-Barrera, A. L. Medina Castillo, A. V. Delgado
Summary: This study analyzes the electrokinetic response of nanoparticles suspensions coated with a shell of polyelectrolyte under the action of alternating electric fields. The use of electrokinetics helps to characterize the coating in situ in order to control the stability and functionalization of the particles. AC electrophoresis and dielectric dispersion techniques are evaluated to provide rich and rigorous information on various parameters such as particle size, charge, thickness, and rigidity. The results showed that the brush-like structure of the polyelectrolyte coating enhanced the mobility and stability of the particles compared to the soft coating.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Physics, Applied
Atanu K. K. Saha, Mengwei Si, Peide D. D. Ye, Sumeet K. K. Gupta
Summary: Understanding the role of the dielectric layer in ferroelectric Hf0.5Zr0.5O2 based devices is crucial for application-driven optimizations. Experimental and simulation studies have shown that an increase in dielectric layer thickness results in changes in polarization switching mechanisms, leading to a decrease in remanent polarization and an increase in coercive voltage. Additionally, the effective polarization-voltage characteristics of the FE layer in the FE-DE stack exhibit a negative slope region, contributing to charge enhancement effects.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Multidisciplinary
Xavier Vendrell, Julia Ramirez-Gonzalez, Zuo-Guang Ye, Anthony R. West
Summary: In this study, impedance measurements and equivalent circuit analysis were used to reveal the key role of a constant phase element in the behavior of relaxor ferroelectric materials. This finding is significant for understanding the relaxation mechanisms and controlling the characteristics of relaxor materials.
COMMUNICATIONS PHYSICS
(2022)
Article
Physics, Multidisciplinary
M. Ya Sushko, S. D. Balika
Summary: We study the role of the electrical double layer in the formation of the quasistatic electrical conductivity of nanosized particle suspensions. By modeling the microstructure of the suspension, we derive general integral relations for the desired conductivity that incorporate the effect of the electrical double layer. The model is demonstrated to accurately describe experimental data for latex suspensions in high ionic strength electrolyte solutions.
Article
Materials Science, Ceramics
S. S. Aplesnin, L. Udod, M. N. Sitnikov, O. B. Romanova
Summary: This study investigated the electrical characteristics of Bi2Sn2-xFexO7 (x = 0.1, 0.2) stannates, including electrical resistance, impedance, I-V characteristics, capacitance, and more, and established correlations between certain characteristics and phase structure transitions.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Roman Cimbala, Peter Havran, Jozef Kiraly, Michal Rajnak, Juraj Kurimsky, Milos Sarpataky, Bystrik Dolnik, Katarina Paulovicova
Summary: Dielectric nanofluids based on transformer oil and magnetic nanoparticles have controllable physical properties due to magnetic fields, and fullerene-based nanofluids exhibit superior dielectric performance. In this study, iron oxide and fullerene nanoparticles are combined into a transformer oil-based hybrid nanofluid. The dielectric response of the nanofluids is examined using dielectric relaxation spectroscopy, revealing that the dielectric spectrum is dominated by the magnetic nanoparticles. The relaxation times logarithmically increase with an increasing concentration of fullerenes.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Electrical & Electronic
Min Liao, Hao Xu, Jiahui Duan, Shujing Zhao, Fengbin Tian, Junshuai Chai, Kai Han, Yibo Jiang, Jinjuan Xiang, Wenwu Wang, Xiaolei Wang
Summary: We investigated the impact of saturated spontaneous polarization (Ps) on the endurance fatigue of Si FeFET with MFIS gate structure. By changing the gate structure, we tuned the Ps in the range of 25.9-6.4 mu C/cm(2). A decrease in Ps resulted in a smaller memory window and improved endurance. The competition between reduced read noise margin and weaker charge trapping behavior determined the endurance characteristic.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Chemistry, Analytical
Shiwei Zhang, Hiromasa Baba, Tetsuo Sakka, Naoya Nishi
Summary: The interfacial dielectric relaxation of ionic liquids at the gold electrode interface was investigated using electrochemical surface plasmon resonance. The study revealed a fast relaxation process mainly attributable to ionic reorientation, followed by an ultraslow relaxation process due to ionic translation, with different directions of SPR shift for positive and negative potential steps.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Physics, Condensed Matter
Kalyani Dhabekar, K. Mohan Kant
Summary: In this study, nanocomposites of cobalt ferrite were successfully synthesized using the chemical co-precipitation route, and characterized for their electrical transport properties in different temperatures. The dielectric permittivity of the composites was found to increase with temperature, with the AC conductivity mechanism explained by Koop's theory and Maxwell-Wagner model, showing a higher conductivity in C/S-1/1 compared to C/B-1/1 at different temperatures.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Chemistry, Physical
Y. Kalyuzhnyi, T. Patsahan, M. Holovko, P. T. Cummings
Summary: An analytical solution of the AMSA for the hard-sphere multi-patch colloidal model with dipole-dipole interaction is derived, and two more approximations are built based on this solution. The accuracy of theoretical predictions is evaluated using computer simulation data, showing good agreement with Monte Carlo predictions. Possible extensions of the theory are outlined for future research.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Crystallography
Miroslaw Galazka, Natalia Osiecka-Drewniak
Summary: Dielectric polarization and electric polarization are common features of polar materials, and their contributions are important markers of phase transitions. By analyzing the temperature dependencies and exponents characterizing dielectric conductivity and electrode polarization, we can study the behavior of materials during phase transitions and observe discontinuities at certain transition temperatures.
Article
Chemistry, Physical
Wenying Zhou, Ting Li, Mengxue Yuan, Bo Li, Shaolong Zhong, Zhen Li, Xiangrong Liu, Juanjuan Zhou, Yun Wang, Huiwu Cai, Zhi-Min Dang
Summary: This study investigates polymer nanocomposites containing a series of Al@Al2O3 nanofillers with different shell thicknesses. It demonstrates that forming an insulating shell enables independent control of intra-particle polarization and inter-particle polarization, leading to high dielectric constant and low dielectric loss. This core-shell structured nanocomposites not only surpass unmodified nanofiller composites in terms of dielectric properties, but also improve thermal conductivity and field resistivity, resulting in stable operation at low temperatures.
ENERGY STORAGE MATERIALS
(2021)
Article
Engineering, Multidisciplinary
Doyel Pandey, Somnath Bhattacharyya
Summary: This study investigated the impact of solid polarization of a dielectric membrane on ion transport in a conical nanopore, highlighting the importance of considering solid polarization in analyzing electroosmotic flow and ion transport in such systems.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Chemistry, Physical
Panpan Zhang, Xu Wang, Yangyang Yang, Haifeng Yang, Chunsheng Lu, Mingru Su, Yu Zhou, Aichun Dou, Xiaowei Li, Xiaochuan Hou, Yunjian Liu
Summary: In this study, the influence of transition metal doping on the electronic and mechanical properties and electrochemical performance of 2HMoS2/NC was investigated using Cobalt (Co) as an example. Co doping was found to effectively improve the electronic conductivity and active site areas of 2H-MoS2/NC at different positions, optimizing the adsorption and diffusion capability of potassium ions. Furthermore, the study revealed the optimal roles of different types of nitrogen atoms in kinetic adsorption, diffusion, and interfacial stability of potassium ions. These findings provide guidance for the experimental design of high rate 2H-MoS2/NC electrode materials and the optimal design of other functional composite materials.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zeeshan Ajmal, Mahmood Ul Haq, Shahid Zaman, M. K. Al-Muhanna, Anuj Kumar, Mohammed M. Fadhali, Siwar Ben Hadj Hassine, Muhammas Qasim, K. F. Alshammari, Ghulam Abbas Ashraf, Abdul Qadeer, Adil Murtaza, Sulaiman Al-Sulaimi, Huaqiang Zeng
Summary: This study presents a novel heterojunction structure (SrTiO3/CN-TAL10.0) for enhanced photocatalytic water splitting (PWS). The incorporation of thiophenedicarboxaldehyde (TAL) through copolymerization significantly improves the photocatalytic activity of carbon nitride (CN) while maintaining its photostability performance. The optimized composition allows efficient isolation of photoinduced charge carriers and enhanced charge transport, resulting in a remarkable increase in overall photocatalytic efficiency.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Angela Arnosa-Prieto, Patricia Diaz-Rodriguez, Manuel A. Gonzalez-Gomez, Pelayo Garcia-Acevedo, Lisandra de Castro-Alves, Yolanda Pineiro, Jose Rivas
Summary: Macrophages can exhibit different phenotypes depending on the microenvironment and the characteristics of magnetic iron oxide nanoparticles (MNPs). This study demonstrates that the concentration and morphology of MNPs can influence the polarization of macrophages. The findings have implications for therapeutics targeting tissue regeneration and tumor progression.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yu Fang, Cheng-Ye Zhu, Hao-Cheng Yang, Chao Zhang, Zhi-Kang Xu
Summary: This study demonstrates the advantages of vacuum-assisted interfacial polymerization (VAIP) in fabricating polyimide nanofiltration membranes. By using vacuum filtration, aqueous solutions of PIP can be evenly distributed on different microfiltration substrates, leading to the fabrication of uniform and ultra-thin polyamide layers with excellent performance. The membranes exhibit high rejection rates and water permeance, as well as satisfactory long-term stability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Isaac J. Gresham, Edwin C. Johnson, Hayden Robertson, Joshua D. Willott, Grant B. Webber, Erica J. Wanless, Andrew R. J. Nelson, Stuart W. Prescott
Summary: Understanding the interactions between polymers and surfactants is crucial for optimizing commercial systems. This study tested the behavior of polymer-surfactant systems, revealing that they do not behave like polyelectrolytes in the presence of salt. Additionally, the structure of polymer-surfactant complexes under confinement differs from that of polyelectrolytes.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yunxiao Xie, Cui Liu, Jie Zhang, Yan Li, Bin Li, Shilin Liu
Summary: This study aimed to improve the microstructure and rheological properties of W/W Pickering emulsions by crosslinking sodium alginate at the water-water interface, thereby enhancing the activity of encapsulated probiotics in simulated gastrointestinal digestion.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Sang Ho Lee, Yige Sun, Patrick S. Grant
Summary: This research developed an effective approach to enhance the charging rates of lithium ion batteries (LIBs) by strategically incorporating carbon nanotube (CNT) conductivity boosters into Li4Ti5O12 (LTO) electrodes. Multi-layer architectures comprising CNT-rich and CNT-free LTO electrode layers were manufactured using a layer-by-layer spray coating method to promote charge transfer kinetics of high mass loading electrodes. The best performing multi-layer was paired with a spray-coated LiFePO4 (LFP) positive electrode, resulting in attractive power performance that outperformed conventional LTO || LFP combinations.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jingwei Liang, Shaobin Li, Fengbo Li, Li Zhang, Yufeng Jiang, Huiyuan Ma, Kun Cheng, Liang Qing
Summary: A molybdenum-regulated self-supporting electrode material with rich vacancy defects has been successfully synthesized and shows exceptional catalytic activities and stability for electrocatalytic overall water splitting. This study provides a new perspective for the design and synthesis of non-precious metal bifunctional electrocatalysts.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jonas Blahnik, Jennifer Schuster, Rainer Mueller, Eva Mueller, Werner Kunz
Summary: This study investigates the relationship between the morphology of PMMA monopolymers and PMMA-PHEMA copolymers with the expected nature of surfactant-free microemulsions (SFMEs) before polymerization. It is found that previously mesostructured, surfactant-free mixtures can produce porous polymers of different morphologies, while unstructured, oil-rich regions lead to solid, transparent polymers without nanostructured morphologies. Additionally, a surfactant-based reference system shows similar phase behavior and polymer morphologies as the comparable surfactant-free system, indicating the importance of the hydrotropic behavior of HEMA in this system.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zheng-Fen Pu, Wen-Zhi She, Rong Sheng Li, Qiu-Lin Wen, Bi-Chao Wu, Chun-Hua Li, Jian Ling, Qiue Cao
Summary: This study synthesized two framework-isomeric covalent organic frameworks (COFs) and discovered that the light scattering signal of COFs can be used for the analytical detection of lead ions. By controlling synthesis conditions and introducing regulators, the morphology of COFs could be controlled and framework-isomeric COFs could be precisely synthesized.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yuchen Weng, Ying Hong, Jingyu Deng, Sicheng Cao, Li-Juan Fan
Summary: This paper reports the preparation of dynamic color-changing fluorescent polymer nanoparticles (PNPs) by constructing a fluorescence resonance energy transfer (FRET) pair. The PNPs show excellent anti-counterfeiting effects and reproducibility. The study demonstrates a promising encryption strategy that can achieve multiple outputs with simple operation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Guodong Liu, Zijian Wang, Jianing Wang, Hanbin Liu, Zhijian Li
Summary: This study investigates the combination of multicolor switchable polyaniline (PANI) electrode and 1-methyl-4,4'-bipyridyl iodide (MBI), which demonstrates superior optical properties in visible and near-infrared light modulation, as well as excellent electrochemical performances. This combination can be used to develop novel electrochromic devices for applications in smart packaging, smart labels, and flexible smart windows.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Huying Yan, Yang Guo, Xingzhi Bai, Jiawei Qi, Haipeng Lu
Summary: By modifying Ti3C2Tx through heterogeneous interface engineering, optimized impedance matching is achieved, leading to enhanced electromagnetic wave absorption performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Kehu Zhang, Yang Zhou, Silvia Moreno, Simona Schwarz, Susanne Boye, Brigitte Voit, Dietmar Appelhans
Summary: This article presents an advanced crosslinking strategy to fabricate clustered polymersomes using host-guest interactions. By controlling the input of crosslinker and environmental conditions, reversible aggregation and disassembly of these polymersomes can be achieved. The size and structure of these clustered polymersomes can be regulated and visualized through a fluorescent enzymatic cascade reaction.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Junjie Xu, Weixiong Huang, Ruiling Li, Li Li, Jinjin Ma, Jiaou Qi, Haiyan Ma, Min Ruan, Lilin Lu
Summary: In this study, a potassium doped palladium catalyst was developed for acetylene hydrogenation, showing excellent catalytic performance and durability. The doping of potassium effectively weakened the adsorption of ethylene, improved ethylene selectivity, and lowered the barriers of hydrogen activation and transfer reactions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)