Article
Automation & Control Systems
Dulyawat Doonyapisut, Byeongkyu Kim, Jung Kyu Kim, Eunseok Lee, Chan-Hwa Chung
Summary: Advancements in energy storage, photocatalysis, and sensors have generated large amounts of electrochemical impedance (EIS) data. Interpreting this data is challenging, but recent progress in machine learning (ML) models for EIS classification has been made. However, most models lack physical descriptor representation. In this study, variational autoencoders (VAE) were applied to EIS data analysis, achieving accurate classification, parameter prediction, and physical descriptor visualization.
ENGINEERING APPLICATIONS OF ARTIFICIAL INTELLIGENCE
(2023)
Article
Engineering, Multidisciplinary
Jianchao Zhang, Fan Zheng, Zheming Liu, Shuxian Hong, Biqin Dong, Feng Xing
Summary: The nondestructive monitoring of the cement hydration process was achieved through electrochemical impedance spectroscopy (EIS) in this study. A novel equivalent circuit model was established to characterize the cement hydration process electrochemically, revealing a positive correlation between the resistance parameter (Rct1) and both the hydration degree and compressive strength. The EIS method based on Rct1 can trace and characterize the development stages of the hydration process non-destructively.
Article
Automation & Control Systems
Xin Ma, Xiaoyun Hu, Shukai Fan, Hansong Li
Summary: This study investigates the impact of reinforced particles on the electrochemical corrosion behavior of titanium matrix composites (TMCs) and reveals a mechanism of passive film fragmentation through pore corrosion. The results indicate that the content of reinforced particles does not affect the rate of passive film formation but increases defects in the film, making electrochemical reactions more likely. A new method for measuring passive film removal time is introduced, and a model is developed to simulate TMC dissolution in NaCl solution.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
J. Pelle, M. Longo, N. Le Poul, C. Hellio, S. Rioual, B. Lescop
Summary: We thoroughly investigated biofilm formation onto glassy carbon electrode surfaces using electrochemical techniques. Pseudomonas aeruginosa was studied due to its remarkable ability to form biofilms in various environments. In-situ measurement of the open-circuit potential was used to monitor the modification of the electrode-solution interface during biofilm growth, which was correlated with results obtained from other techniques such as electrochemical impedance spectroscopy, cyclic voltammetry, scanning electron microscopy, and bioassays. The sensing of biofilm formation suggests a multi-step mechanism that may involve the pre-formation of an insulating layer onto the surface prior to bacteria adhesion and biofilm formation.
BIOELECTROCHEMISTRY
(2023)
Article
Chemistry, Physical
Xiaohu Zhang, Xiong Zhang, Xianzhong Sun, Yabin An, Shuang Song, Chen Li, Kai Wang, Fangyuan Su, Cheng-Meng Chen, Fangyan Liu, Zhong-Shuai Wu, Yanwei Ma
Summary: This study analyzed the impedance characteristics of LICs and established an ECM model to describe their impedance behavior. It was found that the charging-discharging cut-off voltage and cycle numbers greatly influence the impedance and capacity retention rate of LICs.
JOURNAL OF POWER SOURCES
(2021)
Article
Electrochemistry
Hangyue Li, Zewei Lyu, Minfang Han
Summary: The Equivalent Circuit Model (ECM) is a powerful technique to analyze and compare Electrochemical Impedance Spectroscopy (EIS) data. However, noise poses a challenge to the accuracy of ECM. In this paper, a robust and fast algorithm is proposed to detect outliers, weigh the EIS data, and fit an ECM within a second, significantly reducing the impact of noise.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Inorganic & Nuclear
Yating Qi, Ming Yang, Tian-En Zhao, Guorui Tang, Hongming He, Hongming Sun, Yijie Yang, Cheng-Peng Li
Summary: Nanoporous silver structures with a superhydrophobic surface were fabricated, which showed superior electrochemical nitrogen reduction reaction (ENRR) performance under ambient conditions. It exhibited higher ammonia yield and faradaic efficiency, as well as excellent electrochemical stability and selectivity. This hydrophobic nanoporous catalyst design provides a valuable practical strategy for ENRR and other gas-relevant electrochemical reactions.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Green & Sustainable Science & Technology
Roma Agrahari, Radha Rani
Summary: A litre-scale multi-modular microbial fuel cell was operated using exo-electrogenic inoculum enriched from cow-dung for 45 days in batch mode, under three different circuit connections. Electrochemical analysis showed that the individual circuit had the highest power output and the lowest internal resistance. Additionally, the study reported COD removal rate and columbic efficiency of the MFC.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Multidisciplinary
Viktoria Heine, Tom Kremers, Nora Menzel, Uwe Schnakenberg, Lothar Elling
Summary: The study presents a novel electrochemical impedance spectroscopy sensor for real-time monitoring of bacterial fucosyltransferase binding kinetics. By immobilizing a multivalent neoglycoprotein on the sensor, the researchers were able to detect glycosyltransferase activities and protein-glycan interactions, which could be valuable for detecting pathogenic bacteria and cancer cells in future biomedical applications.
Article
Chemistry, Physical
Davood Peyrow Hedayati, Gita Singh, Michael Kucher, Tony D. Keene, Robert Boehm
Summary: This study aims to improve the performance of solid-state supercapacitors (SSCs) by simulating their impedance using a defined equivalent circuit (EC) model. Two models, a mathematical model and a physicochemical model, were used and the impedance was measured using electrochemical impedance spectroscopy (EIS). The physicochemical model showed higher approximation ability due to its more complex circuit design, but also required more modeling and optimization effort.
Article
Biochemical Research Methods
Flore Rembert, Arnaud Stolz, Cyprien Soulaine, Sophie Roman
Summary: We utilize microfabrication technologies to miniaturize geoelectrical acquisition for investigating coupled processes in the critical zone. Specifically, we focus on the development of complex electrical conductivity acquisition using the spectral induced polarization (SIP) method on a microfluidic chip with electrodes. By working at the micrometer scale, we are able to monitor biogeochemical processes in well-controlled conditions and directly observe microscopic reactive transport processes in the critical zone.
Article
Materials Science, Multidisciplinary
Ru Bai, Shuguang Liu, Liqiang Yin, Changwang Yan, Ji Zhou, Lihe Lu, Lin Li
Summary: In this work, the damage degree of freeze-thaw of engineered cementitious composites (ECC) was assessed by electrochemical impedance spectroscopy (EIS) technique. The results showed that the EIS behavior of ECC varied with the freeze-thaw cycles, with the diameter of the Nyquist curve in high frequency gradually reduced and the volume resistance decreasing. A simplified microstructure and conductive paths were used to describe the freeze-thaw damage mechanism of ECC, and an equivalent circuit model of ECC exposed to freeze-thaw cycles was proposed.
MATERIALS & DESIGN
(2023)
Article
Construction & Building Technology
Lin Chi, Tao Du, Shuang Lu, Wenda Li, Mian Wang
Summary: This study investigates the hydration process of cement with Na2CO3 using electrochemical impedance spectroscopy combined with conventional characterization methods. The results show that Na2CO3 can promote early-age hydration but slow down later-stage hydration, with the same trend in compressive strength development, and the mechanism of Na2CO3 on cement hydration is revealed. The study concludes that electrochemical impedance spectroscopy is a promising method for assessing the microstructure and macroscopic properties of cement-based materials.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Paper & Wood
Yilun Wang, Chenshan Dong, Dongdong Ma, Hongman Xu, Ruquan Zhang, Hongjun Yang, Xin Liu, Bin Shang, Jingjing Huang, Shaojin Gu
Summary: Fabricating a multifunctional superhydrophobic cotton fabric with antibacterial properties is highly desirable but rare. This study proposes a one-step redox reaction strategy based on PMHS and [Ag(NH3)(2)](+) ions to endow cotton fabrics with superhydrophobic and antibacterial properties. The modified cotton fabrics exhibit high repellency against common liquids and significant antibacterial activity. The stability of the modified cotton fabrics, even under various treatments, makes them highly desirable for long-lasting anti-fouling, oil/water separation, and antibacterial applications.
Article
Chemistry, Physical
Marcel Esser, Gunnar Rohde, Christian Rehtanz
Summary: This paper demonstrated the development of a setup that performs impedance spectroscopy on commercial lithium-ion battery cells and packs using standard measurement equipment. The setup allows for a wider range of measurements and applications compared to commercial devices.
JOURNAL OF POWER SOURCES
(2022)
Article
Nanoscience & Nanotechnology
Amandeep Singh, Turkka Salminen, Mari Honkanen, Juha-Pekka Nikkanen, Tommi Vuorinen, Risto Kari, Jorma Vihinen, Erkki Levanen
Article
Engineering, Civil
Markku Ylonen, Pentti Saarenrinne, Juha Miettinen, Jean-Pierre Franc, Marc Fivel, Jarmo Laakso
JOURNAL OF HYDRAULIC ENGINEERING
(2020)
Article
Materials Science, Coatings & Films
Tommi Varis, Tomi Suhonen, Jarmo Laakso, Mika Jokipii, Petri Vuoristo
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2020)
Article
Materials Science, Multidisciplinary
Ville Saarimaa, Nuria Fuertes, Dan Persson, Tommy Zavalis, Aaretti Kaleva, Juha-Pekka Nikkanen, Erkki Levanen, Golrokh Heydari
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
(2020)
Article
Materials Science, Multidisciplinary
Ville Saarimaa, Aaretti Kaleva, Erkki Levanen, Pasi Vaisanen, Antti Markkula
Summary: The surface activity of different zinc alloys in wet supercritical CO2 was evaluated, with the surface chemistry of the zinc coating governing corrosion product formation. The behavior of different coatings varied in wet supercritical CO2, with some preventing growth of corrosion products while others showed high reactivity. Wet supercritical CO2 was found to be a convenient medium for assessing the early-stage corrosion of metal coatings.
Article
Materials Science, Multidisciplinary
A. Kaleva, T. Tassaing, V Saarimaa, G. Le Bourdon, P. Vaisanen, A. Markkula, E. Levanen
Review
Engineering, Manufacturing
Setareh Zakeri, Minnamari Vippola, Erkki Levanen
ADDITIVE MANUFACTURING
(2020)
Article
Materials Science, Ceramics
Niina Merilaita, Teemu Vastamaki, Arnold Ismailov, Erkki Levanen, Matti Jarvelainen
Summary: Hierarchically porous structures are crucial for gas adsorption applications and can be manufactured using stereolithography technology. The focus of the study was on optimizing the properties of light-cured resin to ensure stability during shaping and maintaining shape in the debinding process. By successfully preparing slurries, monoliths with channel geometry and retained adsorption properties were created using stereolithography.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Ville Saarimaa, Aaretti Kaleva, Juha-Pekka Nikkanen, Erkki Levanen, Pasi Vaisanen, Antti Markkula
MATERIALS CHEMISTRY AND PHYSICS
(2020)
Article
Chemistry, Multidisciplinary
Jussi Silvonen, Niko Jarvela, Markus Koppanen, Matti Jarvelainen, Arto Ojuva, Erkki Levanen
Summary: Online control of industrial processes based on lean principles can increase productivity and product quality; Polysaccharides are dissolved in liquids in industrial products, controlling viscosity is important for product functionality; The electromagnetic field technique can monitor changes in the concentration of polysaccharide solutions online.
Article
Optics
Tero Kumpulainen, Amandeep Singh, Thomas Marz, Litong Dong, Jarno Reuna, Jorma Vihinen, Dayou Li, Erkki Levanen
Summary: Laser interference lithography enables fast processing over large areas and fine patterns at micro scale. The novel concept in this research combines interference patterning with high-pressure processing environment, allowing control of processing environment and addition of co-solvents for future studies.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Setareh Zakeri, Teemu Vastamaki, Mari Honkanen, Matti Jarvelainen, Minnamari Vippola, Erkki Levanen
Summary: This study focuses on improving the performance of catalytic converters using advanced ceramic stereolithography technology, aimed at achieving green and sustainable transportation. By utilizing a novel photocurable ceramic resin, complex structures are fabricated to optimize catalytic applications, offering flexible control in design and fabrication.
MATERIALS & DESIGN
(2021)
Article
Chemistry, Multidisciplinary
Ville Saarimaa, Aaretti Kaleva, Arnold Ismailov, Tero Laihinen, Markus Virtanen, Erkki Levanen, Pasi Vaisanen
Summary: In a wet supercritical carbon dioxide atmosphere, corrosion of zinc-coated steel occurs as carbon dioxide is dissolved into water. The corrosion products initially appear in nano scale initiation sites, gradually increasing in number and size until they cover the entire surface. Zinc hydroxy carbonate is rapidly formed as a needle-like corrosion product in short exposure times, while prolonged exposure leads to the formation of anhydrous zinc carbonate, creating a stable and dense layer on the zinc surface. This chemical transition from zinc hydroxy carbonate to anhydrous carbonate is reported for the first time in wet supercritical carbon dioxide atmosphere.
ARABIAN JOURNAL OF CHEMISTRY
(2022)
Article
Multidisciplinary Sciences
Amandeep Singh, Tero Kumpulainen, Kimmo Lahtonen, Saara Soyrinki, Jorma Vihinen, Erkki Levanen
Summary: This study utilized DLIP technique to pattern titanium and zinc targets in high pressure, supercritical and liquid CO2. The patterned surfaces were characterized using various techniques, and the results revealed the formation of ordered uniform donut ring patterns with unique features. This study also reported the formation of several compounds on the patterned surfaces by DLIP in the specified CO2 environments.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Erkka J. Frankberg, Aloshious Lambai, Jiahui Zhang, Janne Kalikka, Sergei Khakalo, Boris Paladino, Mattia Cabrioli, Nidhin G. Mathews, Turkka Salminen, Mikko Hokka, Jaakko Akola, Antti Kuronen, Erkki Levanen, Fabio Di Fonzo, Gaurav Mohanty
Summary: This research discovers the significant plasticity of amorphous aluminum oxide (a-Al2O3) at room temperature and verifies its plasticity mechanism at both micro and macro scales. This finding has important implications for the development of engineering materials.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Wenjing Tan, Chunmei Gao, Shifeng Ji, Yunqing Xing, Yi Guo, Baogui Liang
Summary: Membrane separation technology is widely used in wastewater treatment due to its cost-effectiveness and productivity. However, organic membrane fouling caused by humic acid is a major barrier to its further development. This study successfully addressed this issue through the production of composite materials and self-cleaning membranes, providing beneficial strategies and solutions for membrane contamination problems.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Qichang Peng, Qingdong Ruan, Bin Wang, Jinyuan Liu, Chao Huang, Xingwang Zhu, Dan Li, Liangliang Liu, Yinchuan Wang, Xiaolin Zhang, Jia Yan, Paul K. Chu, Hui Xu
Summary: The escalating issue of water pollution has led to significant attention in the field of photocatalysis. In this study, OV-Sb2WO6-X photocatalyst with oxygen vacancies was synthesized, which exhibited enhanced charge separation efficiency and improved photocatalytic activity. The introduction of oxygen vacancies was successfully controlled and characterized, and the modified photocatalyst showed superior degradation efficiency for dye wastewater treatment.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Wangcheng Zhang, Cunchuan Zheng, Hu Xie, Weichao Du
Summary: By using a specific curing agent ETB, the problem of dispersion and stability for oily epoxy resin in cement slurry system has been successfully solved. The application of the emulsified curing agent ETB in oilfield cement slurry system shows good rheological performance, resistance to high temperature and high pressure water loss, and corrosion resistance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
O. I. Krivonos, A. Babenko, O. B. Belskaya
Summary: This study synthesized biochar based on sapropel and investigated the effects of chemical modification on its textural characteristics, acid-base properties, and adsorption properties. The results showed that the chemical modification increased the fraction of micropores, specific surface area, and changed the surface properties of biochar. The experiment also revealed that biochar pretreated with alkali exhibited the maximum adsorption capacity for copper ions. A conceptual model identifying the mechanisms of copper adsorption on sapropel-based biosorbent was proposed.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
H. Lachhab, N. Benzbiria, A. Titi, S. Echihi, M. E. Belghiti, Y. Karzazi, A. Zarrouk, R. Touzani, C. Jama, F. Bentiss
Summary: The corrosion inhibitory potency of two new pyrimidine-pyrazole derivatives, PPA and PPC, was evaluated for mild steel in 1 M HCl. The results showed enhanced inhibition activities with increased concentration, reaching maximal values of 91.15% and 92.39% for PPA and PPC, respectively. However, the mitigation potency decreased with increasing temperature. SEM and XPS analysis revealed that PPA and PPC adsorbed on the mild steel surface, forming a shielding layer that prevented the dissolution of the steel in the acidic solution.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Shanmugapriya Sivalingam, D. Jeya Sundara Sharmila, Goutham Golla, Lakshmanan Arunachalam, Tarunendu Singh, G. Karthikeyan, A. Shanthi, Kannan Malaichamy
Summary: This study aims to develop a nano-biofungicide comprising of volatile essential oil molecules to enhance its efficacy in the field of agriculture through easily scalable green synthesis technique. The nano biofungicide was prepared through one pot hot melt ultrasonication technique with easy water dispersibility and long term stability. The physico-chemical analysis revealed that, nano bio-fungicides were amorphous sphere-shaped nanoparticles with low melting point. The encapsulation efficiency of major components of essential oil was determined, and it was found that they followed Higuchi model of release kinetics. The essential oil loaded nanostructured lipid carrier showed significantly higher mycelial growth inhibition compared to pure essential oil, indicating enhanced bio-efficacy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Yinlong Li, Yingqing Zhan, Yiwen Chen, Hongshan Jia, Ximin Chen, Fei Zhu, Xulin Yang
Summary: In this study, ZnO quantum dots decorated MXene nanosheets were used as a functional filler for waterborne epoxy coating. The improved dispersion and synergy of ZnO QDs and MXene nanosheets enhanced the anticorrosion performance of the coating.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Fucheng Guan, Jing Tao, Qiang Yao, Zheng Li, Yihang Zhang, Shi Feng, Jianbin Sun, Qiang Yang, Xuecui Song, Jing Guo, Yuanfa Liu
Summary: This paper presents a method for preparing adsorbent materials based on biomass that can efficiently adsorb methylene blue. The experimental results show that the material has a hierarchical structure, high adsorption capacity, and reusability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Pengfei Hu, Zuli Mo, Weiliang Wang, Chengzhe Li, Zhaojia Guo, Guanqing Lin, Zhimin Guo
Summary: This study developed a novel in-situ particle vision and measurement (PVM) system to investigate heterocoagulation between coarse and fine particles in mineral processing. The experimental results showed that the degree of heterocoagulation decreased with increasing pH and stirring speed. Furthermore, under certain hydrodynamic conditions, coal particles were more distributed at the rear of the glass bead.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Tanveer ul Haq Zia, Anwar ul Haq Ali Shah, Behisht Ara, Kashif Gul
Summary: A label-free immunosensor for detection of hepatitis C core antigen was fabricated using a ternary nanocomposite based on polypyrrole, silver doped zinc oxide, and exfoliated graphene. The immunosensor demonstrated low detection limit, high selectivity, and stability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Xiaoyan Feng, Jiachen Li, Lijun Liang, Linli Zhu, Sa Liu, Li Ren
Summary: In this study, polystyrene divinylbenzene microspheres were surface-modified by poly(carboxybetaine methacrylate) to develop an efficient hemoperfusion adsorbent for the removal of protein-bound toxins. The modified microspheres showed increased adsorption capacity and better biocompatibility, making them promising for clinical hemoperfusion therapy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Xiaoye Bi, Dong Xue, Yunpeng Wang, Chencheng Lv, Zexiong Li, Tao Zhao
Summary: This research aimed to develop a durable and formaldehyde-free flame retardant treatment for cotton fabrics. The results demonstrated successful grafting of phosphorous acid (PA) onto cotton fabrics, leading to enhanced flame resistance while maintaining the desired fabric characteristics.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Ruolin Wang, Wenjuan Sun, Haisheng Han, Dongping Tao
Summary: This study finds that Al-starch colloidal depressants can effectively inhibit the flotation of ultrafine calcite and chlorite, and increase the grade of valuable minerals. The chemisorption of Al-starch on mineral surface changes the functional group peaks and generates new O-Al functional groups.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Wondimu K. Wakejo, Ali Maged, Beteley T. Meshesha, Joon W. Kang, Abayneh G. Demesa, Sandip Chakrabarti, Thallada Bhaskar, Ashok Kumar Gupta, Amit Bhatnagar
Summary: Simultaneously removing different pharmaceutical pollutants from wastewater is an important environmental issue, and the use of a system that can remove multiple contaminants at once is necessary. Functionalized biochar (FBC) has been found to be effective in simultaneously removing acetaminophen and ciprofloxacin and other pharmaceutical pollutants.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Yu Wang, Fengwen Yan, Jie Wu, Zhijun Huang, Liuting Song, Shunda Yuan
Summary: In this study, Cu single atoms are anchored on the external surface of g-C3N4 nanofibers to maximize atom utilization. This catalyst exhibits excellent Fenton-like catalytic activity and good stability due to the full utilization of Cu active sites.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)