Article
Engineering, Electrical & Electronic
Tanuj Saxena, Vishnu Khemka, Ganming Qin, Moaniss Zitouni, Raghu Gupta
Summary: This study analyzes the core-shell SJ structure theoretically and numerically, developing an analytical model with closed-form expressions for electric field profiles in both core-shell and linear stripe structures. The comparison between 2-D and 3-D RESURF reveals that neither design is universally better, with the superior design determined by fabrication technology limitations.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Biology
Anirudh Wodeyar, Mark Schatza, Alik S. Widge, Uri T. Eden, Mark A. Kramer
Summary: A state space phase estimator for real-time tracking of brain rhythms is proposed, outperforming current methods in simulations and demonstrated in vivo. The method is available as a plug-in for the Open Ephys acquisition system for widespread use in experiments.
Article
Materials Science, Multidisciplinary
Xingyu Chen, Dongling Wu, Ping Zhou, Meijie Chen, Hongjie Yan
Summary: In this study, Cu@C core-shell nanoparticles were designed to enhance solar absorption performance, with significant effects of core radius and shell thickness on optical properties observed. Taking into account multi-scattering effects, careful consideration of core-shell size parameters is crucial for evaluating solar absorption performance in nanoparticle suspensions.
JOURNAL OF MATERIALS SCIENCE
(2021)
Review
Chemistry, Physical
Anupam Sahu, Dharmendra Kumar
Summary: The review article discusses the importance of core-shell quantum dots (CSQDs) in modern applications, including solar cells, LEDs, and luminescent solar concentrators. The classification and applications of CSQD systems, as well as the role of the shell, are highlighted. The article also explores the effects of strain, carrier dynamics, and bandstructure alterations in optoelectronic devices. Additionally, different theoretical modeling techniques for different shapes of CSQD systems are presented, along with a detailed discussion on the theoretical modeling of quantum dot solar cells and the limitations based on modification in the recombination current density.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Bastian Haehnle, Philipp A. Schuster, Lisa Chen, Alexander J. C. Kuehne
Summary: A synthetic toolbox has been developed to create monodisperse core-shell and core-shell-shell particles composed entirely of different types of conjugated polymers. Seeded and fed-batch dispersion polymerizations based on Suzuki-Miyaura-type cross-coupling allow precise control over the interface between conjugated polymer phases, facilitating control over energy transfer phenomena. This new approach offers synthetic freedom for fine-tuning the optical properties of CPP, potentially enabling the synthesis of individual white light-emitting particles.
Article
Optics
T. Brahim, A. Bouazra, M. Said
Summary: This study modeled core/shell quantum dots to investigate the impact of the ZnS shell material on electronic and optical properties. Theoretical method combining coordinate transformation and finite difference method was used to solve the Schrödinger equation. Evaluations were made on the influence of ZnS shell on various properties such as energy eigenvalues, absorption coefficients, refractive index, and nonlinear susceptibilities.
Article
Polymer Science
Keumkyung Kuk, Lukas Gregel, Vahan Abgarjan, Caspar Croonenbrock, Sebastian Haensch, Matthias Karg
Summary: This paper reports on a one-pot synthesis protocol for micron-sized silica-poly(N-isopropylacrylamide) core-shell microgels and demonstrates excellent control over the shell-to-core ratio. The experimental results show that the synthesized microgels are monodisperse and suitable for optical investigations even at high packing fractions.
Article
Physics, Multidisciplinary
L. L. Afremov, S. Anisimov, I. G. Iliushin
Summary: Theoretical study on the size dependence of the blocking temperature in a system of interacting core/shell nanoparticles was conducted. A method for estimating the blocking temperature of these nanoparticles was presented, showing changes in T-b with magnetostatic interaction intensity and external magnetic field. It was found that large nanoparticles exhibit more significant changes in their blocking temperature. Comparing different approaches, a precise method for determining T-b from ZFC and FC magnetization curves was identified.
CHINESE JOURNAL OF PHYSICS
(2021)
Article
Chemistry, Inorganic & Nuclear
Muhammad Waqas
Summary: A delicate synthesis strategy of Fe2TiO5/Fe2O3 heterostructures was proposed to achieve efficient photocatalytic water oxidation, with the hierarchical structure increasing light absorption depth and promoting the separation of photoinduced excitons, while the high surface area and adequate porosity facilitated the diffusion of electrolyte and adsorption at active sites. Furthermore, the coating of Fe2TiO5/Fe2O3 with graphitic carbon nitride subunits improved photocatalytic water reduction by accelerating the separation of electrons and holes at the contact interface.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Andrew B. Pun, Aniket S. Mule, Jacob T. Held, David J. Norris
Summary: The research team successfully grew thin CdS shells on CdSe MSNC cores via high-temperature synthesis, dramatically improving the emissive properties of the MSNCs. Thicker CdS shells result in decreased performance, but CdxZn1-xS alloyed shells maintain efficient and narrow emission lines.
Article
Chemistry, Multidisciplinary
Hongda Lu, Shi-Yang Tang, Jiayuan Zhu, Xumin Huang, Helen Forgham, Xiangke Li, Ao Shen, Guolin Yun, Jinming Hu, Shiwu Zhang, Thomas P. Davis, Weihua Li, Ruirui Qiao
Summary: By nanoengineering liquid metal nanoparticles and using galvanic replacement, diverse core-shell nanostructures including LM@Au, Au@Ga oxide, and hollow Ga oxide nanoparticles are successfully fabricated. LM@Au exhibits exceptional photothermal performance with a conversion efficiency of 65.9%, which is five times that of gold nanoparticles. The high photothermal conversion efficiency and biocompatibility of LM@Au show promising applications in hyperthermia cancer therapy.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Chemical
Chamanthi Denisha Jayaweera, Chathuranga Wickramasinghe, Mahinsasa Narayana
Summary: This study develops a methodology to analyze phase separation in core-shell structured polymer particles through modeling Case II diffusion and reaction kinetics in seeded suspension polymerization using computational fluid dynamics. The model accurately predicted molecular weights and dynamic simulations aligned with experimental observations. Sensitivity analysis of process parameters on phase separation revealed highest sensitivity to reaction temperature.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Shan-Shan Zhang, Rui-Chen Liu, Xiao-Chen Zhang, Lei Feng, Qing-Wang Xue, Zhi-Yong Gao, Chen-Ho Tung, Di Sun
Summary: This study reveals the differences in structure and properties of two core-shell silver nanoclusters, even though their outer shell protection is almost the same, small changes in the core can lead to significant changes in optical properties.
SCIENCE CHINA-CHEMISTRY
(2021)
Article
Chemistry, Physical
Weize Yuan, Harikrishnan Vijayamohanan, Shao-Xiong Lennon Luo, Keith Husted, Jeremiah A. Johnson, Timothy M. Swager
Summary: In this study, oil-in-water colloidal particles of conducting polymer were fabricated via in situ interfacial polymerization. These particles exhibited a unique core-shell structure and could change their shapes and configurations by altering the charge state of the polymer at the interface. The expansion mechanism of the particles relied on the repulsion caused by the positively charged polymer and the insertion of reduced negatively charged oxidant species. The particles could expand up to 400% of their initial dimensions and retain their structure, and could also shrink back to their original size.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Jiakuan Zhang, Chuyue Li, Jiongzhao Li, Xiaogang Peng
Summary: Size- and shape-controlled CdSe/ZnSe core/shell and CdSe/ZnSe/ZnS core/shell/shell nanocrystals with zinc-blende structure are synthesized. The ligand strain between the inorganic crystal surface and organic ligands plays a key role in ZnSe epitaxy. The lattice strain between the CdSe and ZnSe affects the photoluminescence of CdSe/ZnSe/ZnS core/shell/shell QDs.
CHEMISTRY OF MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Lowie Henderick, Hamid Hamed, Felix Mattelaer, Matthias Minjauw, Johan Meersschaut, Jolien Dendooven, Mohammadhosein Safari, Philippe Vereecken, Christophe Detavernier
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Physical
Bjorn Joos, Jordi Volders, Ricardo Ribeiro da Cruz, Evelien Baeten, Mohammadhosein Safari, Marlies K. Van Bael, An T. Hardy
CHEMISTRY OF MATERIALS
(2020)
Article
Polymer Science
Ahmad Allahbakhsh, Saeed Yari, Mohammadhosein Safari, Deepak P. Dubal
EUROPEAN POLYMER JOURNAL
(2020)
Article
Chemistry, Physical
Hamid Hamed, Saeed Yari, Jan D'Haen, Frank Uwe Renner, Naveen Reddy, An Hardy, Mohammadhosein Safari
ADVANCED ENERGY MATERIALS
(2020)
Article
Nanoscience & Nanotechnology
Ahmed Shafique, Vijay Shankar Rangasamy, Annick Vanhulsel, Mohammadhosein Safari, Silvia Gross, Peter Adriaensens, Marlies K. Van Bael, An Hardy, Sebastien Sallard
Summary: The study demonstrates the preparation of PEDOT-coated sulfur particles using dielectric barrier discharge plasma technology under atmospheric conditions, showcasing the wide applicability and practicality of this method. Different coating protocols resulted in PEDOT-coated sulfur powders with electrical conductivity in the range of 10(-8)-10(-5) S/cm. Cells containing the optimum-PEDOT-coated sulfur showed improved cycling performance in comparison to cells using raw sulfur as the reference material in lithium-sulfur batteries.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Lowie Henderick, Hamid Hamed, Felix Mattelaer, Matthias Minjauw, Mikko Nisula, Johan Meersschaut, Jolien Dendooven, Mohammadhosein Safari, Philippe Vereecken, Christophe Detavernier
Summary: The study found that nitrogen doping significantly impacts the electrochemical properties of Ti phosphate, increasing the electronic conductivity by three times. Introducing a dual-source precursor can enhance the growth rate and nitrogen content of Ti phosphate, while also improving the rate capability of lithium ion battery electrodes.
JOURNAL OF POWER SOURCES
(2021)
Article
Electrochemistry
Saeed Yari, Jan D'Haen, Marlies K. Van Bael, An Hardy, Mohammadhosein Safari
Summary: The gradual loss of capacity and increase in cell impedance in lithium-ion batteries are mainly due to the depletion of cyclable-lithium reservoir. Intragranular fracture induces a peculiar aging behavior in electrodes, enabling energy recovery and decreasing charge-transfer resistance in electronically well wired electrodes.
ELECTROCHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Fulya Ulu Okudur, Satish Kumar Mylavarapu, Mohammadhosein Safari, Dries De Sloovere, Jan D'Haen, Bjorn Joos, Periyasamy Kaliyappan, An-Sofie Kelchtermans, Pieter Samyn, Marlies K. Van Bael, An Hardy
Summary: This study investigates the influence of pre-calcination temperature, time, and oven type on the particle size and morphology of LNMO powder, and subsequently on the electrochemical performance of lithium-ion batteries. By optimizing the particle size and morphology of LNMO powder, superior initial discharge capacity and capacity retention can be achieved for Li vertical bar LNMO coin cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Electrochemistry
Nicholas W. Brady, Maarten Mees, Philippe M. Vereecken, Mohammadhosein Safari
Summary: This paper suggests simplifying the development of continuum-scale mathematical models using dual number automatic differentiation in conjunction with John Newman's BAND subroutine. By combining the BAND algorithm with dual numbers, accurate and computationally efficient models can be created, significantly reducing personnel time and promoting faster model prototyping.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Satish Kumar Mylavarapu, Fulya Ulu Okudur, Saeed Yari, Dries De Sloovere, Jan D'Haen, Ahmed Shafique, Marlies K. Van Bael, Mohammadhosein Safari, An Hardy
Summary: In this study, a cost-effective chemical solution deposition route of a thin TiOx shell on LiNi0.6Mn0.2Co0.2O2 (NMC-622) particles was demonstrated to improve the electrochemical performance. Surface modification with TiOx was found to enhance rate performance and reduce charge-transfer resistance, showcasing the beneficial impact on the electrochemical performance of NMC-622 positive electrodes in lithium-ion battery applications.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Multidisciplinary Sciences
Hamid Hamed, Lowie Henderick, Behnam Ghalami Choobar, Jan D'Haen, Christophe Detavernier, An Hardy, Mohammadhosein Safari
Summary: In battery research, generating experimental (dis)charge data using coin cells is fast and feasible, but the quantitative interpretation of the data is not trivial and decelerates the process of screening and optimizing electrode materials and recipes. The concept of polarographic map can be leveraged to quantify the contribution of different non-equilibrium phenomena to the performance limitation and total polarization of a lithium-ion cell.
Article
Chemistry, Physical
Ahmed Shafique, Annick Vanhulsel, Vijay Shankar Rangasamy, Mohammadhosein Safari, Giulia Bragaggia, Silvia Gross, Peter Adriaensens, Marlies K. Van Bael, An Hardy, Sebastien Sallard
Summary: This article presents a method of coating sulfur particles with conductive polymer layers using DBD plasma technology under atmospheric conditions. The electrochemical performance of different conductive coated sulfur materials was evaluated, and the results showed that the conductive polymer-coated sulfur improved the capacity fade and rate capability losses of Li-S cells by enhancing electron and Li-ion transport.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Dries De Sloovere, Danny E. P. Vanpoucke, Andreas Paulus, Bjorn Joos, Lavinia Calvi, Thomas Vranken, Gunter Reekmans, Peter Adriaensens, Nicolas Eshraghi, Abdelfattah Mahmoud, Frederic Boschini, Mohammadhosein Safari, Marlies K. Van Bael, An Hardy
Summary: Sodium-ion batteries face stability limitations due to current generation electrolytes, but using nonflammable deep eutectic solvents as electrolytes can enhance electrochemical stability, prolong cycle life, and improve safety.
ADVANCED ENERGY AND SUSTAINABILITY RESEARCH
(2022)
Article
Chemistry, Physical
Saeed Yari, Hamid Hamed, Jan D'Haen, Marlies K. Van Bael, Frank Uwe Renner, An Hardy, Mohammadhosein Safari
ACS APPLIED ENERGY MATERIALS
(2020)
Article
Electrochemistry
Ahmed Shafique, Vijay Shankar Rangasamy, Annick Vanhulsel, Mohammadhosein Safari, Marlies K. Van Bael, An Hardy, Sebastien Sallard
ELECTROCHIMICA ACTA
(2020)
Article
Electrochemistry
Abdul Qayoom Mugheri, Shaista Khan, Ali Asghar Sangah, Aijaz Ahmed Bhutto, Muhammad Younis Laghari, Nadeem Ahmed Mugheri, Asif Ali Jamali, Arsalan Ahmed Mugheri, Nagji Sodho, Abdul Waheed Mastoi, Aftab Kandhro
Summary: Green hydrogen has the potential to transition to a pollution-free energy infrastructure. This study proposes a solution to produce hydrogen during the photoelectrochemical process, offering greater stability and control over chemical reactions. Techno-economic assessments show the efficiency and economic feasibility of co-producing value-added chemicals to enhance green hydrogen production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Danpeng Cheng, Wuxin Sha, Qigao Han, Shun Tang, Jun Zhong, Jinqiao Du, Jie Tian, Yuan-Cheng Cao
Summary: LiNixCoyMn1-x-yO2 (NCM) is a critical cathode material for lithium-ion batteries in electric vehicles. The aging of cathode/electrolyte interfaces leads to capacity degradation and long-term cycle instability. A novel neural network model called ACGNet is developed to predict electrochemical stability windows of crystals, allowing for high-throughput screening of coating materials. LiPO3 is identified as a promising coating material with high oxidation voltage and low cost, which significantly improves the cycle stability of NCM batteries. This study demonstrates the accuracy and potential of machine learning in battery materials.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
P. Mohana, R. Yuvakkumar, G. Ravi, S. Arunmetha
Summary: This study successfully fabricates a non-noble CuO/NiO/rGO nanocomposite and investigates its electrocatalytic performance for oxygen evolution reaction in alkaline environment. The experimental results demonstrate that the electrocatalyst exhibits high activity and good stability, offering a new synthetic approach for sustainable energy production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Qiong Qu, Jing Guo, Hongyu Wang, Kai Zhang, Jingde Li
Summary: In this study, a bifunctional electrode host design consisting of carbon nanofibers implanted ordered porous Co-decorated Al2O3 supported on carbon nanotube film (CNTF) was proposed to address the shuttling effect of lithium polysulfides (LiPSs) and dendrite formation of metal lithium anode in lithium-sulfur (Li-S) batteries. The electrode exhibited excellent conductivity, efficient confinement of LiPSs, and catalytic conversion performance, resulting in high initial capacity and good capacity retention during cycling. As an anode, the electrode showed excellent Li+ diffusion performance and uniform lithium growth behavior, achieving a dendrite-free lithium electrode. The flexible pack cell assembled from these electrodes delivered a specific capacity of 972 mAh g(-1) with good capacity retention.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Hong Zhang, Jin-Peng Yu, Chen Chen, Cheng-Yong Shu, Guang-Yu Xu, Jie Ren, Kai Cui, Wen-Fang Cai, Yun-Hai Wang, Kun Guo
Summary: Spray coating of acetylene black nanoparticles onto stainless steel mesh can enhance its biofilm formation ability and current density, making it a promising electrode material for microbial electrochemical systems. The spray coating method is simple, cost-effective, and suitable for large-size stainless steel electrodes.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Binpeng Hou, Jingjin Chen, Li-Hong Zhang, Xiaowen Shi, Zizhong Zhu
Summary: The electrochemical performance of Li1.20Mn0.44Ni0.32Co0.04O2 and its oxygen-deficient phase Li1.20Mn0.44Ni0.32Co0.04O1.83 was studied through first-principles calculations. The results show that the oxygen-deficient phase has a higher theoretical capacity but lower voltage platform and higher chemical activity compared to the pristine phase.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Yating Du, Sayoko Shironita, Daisuke Asakura, Eiji Hosono, Yoshitsugu Sone, Yugo Miseki, Eiichi Kobayashi, Minoru Umeda
Summary: This study investigates the effect of high- and low-temperature environments on the charge-discharge performance of a Li-ion battery. The deterioration mechanisms of the battery at different temperatures are analyzed through various characterization techniques. The results indicate that the battery performance deteriorates more significantly at a low-temperature environment of 5 degrees C compared to higher temperatures. The understanding of the deterioration mechanisms can contribute to the development of safer battery usage methods.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Si-Si Shi, Zhi-Xiang Yuan, Fei Zhang, Ping Chen
Summary: In this study, a new nano-electrocatalyst was prepared, which exhibited superior electrocatalytic activity for the reduction of NO2- to ammonia in a neutral electrolyte, potentially due to the synergistic enhancement between Co3O4-x and Co.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Berna Dalkiran, Havva Bekirog
Summary: This study reports the use of deep eutectic solvents (DES) based on ethylene glycol and urea as low-cost and green electrolytes for enhancing electrochemical detection of natural antioxidants. The study successfully developed a disposable and effective electrochemical sensing platform for simultaneous determination of ascorbic acid (AA) and gallic acid (GA) using NaOH nanorods on a pencil graphite electrode. The proposed electrode showed improved analytical performance, with higher peak currents and shifted oxidation potentials in DES compared to BR buffer medium.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Sijun Ren, Jianguo Huang
Summary: In this study, a novel bio-inspired nanofibrous WO3/carbon composite was synthesized using a facile hydrothermal method. The three-dimensional network structure of the composite alleviated the volume expansion of WO3 nanorods and enhanced the charge-transport kinetics. The optimized composite exhibited superior lithium storage properties.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Zhilong Zheng, Yu Chen, Hongxia Yin, Hengbo Xiao, Xiangji Zhou, Zhiwen Li, Ximin Li, Jin Chen, Songliu Yuan, Junjie Guo, Haibin Yu, Zhen Zhang, Lihua Qian
Summary: This study found that interstitial Zn cations in CoMoO4 can modulate the dissolution kinetics of Mo cations and improve the OER performance. The interstitial Zn cations can prevent the dissolution of Co cations at high potential, enhancing the durability of the catalyst.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Xiaobo Lin, Shern R. Tee, Debra J. Searles, Peter T. Cummings
Summary: Molecular dynamics simulations using the constant potential method were used to investigate the charging dynamics and charge storage of supercapacitors. The simulations revealed that the water-in-salt electrolyte exhibited the highest charge storage and significantly higher capacitance on the negative electrode. The varying contributions of different electrode regions to supercapacitor performance were also demonstrated.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Wiktoria Lipinska, Vita Saska, Katarzyna Siuzdak, Jakub Karczewski, Karol Zaleski, Emerson Coy, Anne de Poulpiquet, Ievgen Mazurenko, Elisabeth Lojou
Summary: The spatial distribution of enzymes on electrodes is important for bioelectrocatalysis. In this study, controlled spatial distribution of gold nanoparticles on Ti nanodimples was achieved. The efficiency of enzymatic O2 reduction was found to be influenced by the size of the gold nanoparticles and their colocalization with TiO2. The highest stability of enzymatic current was observed with the largest gold nanoparticles.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Tariq M. Al-Hejri, Zeenat A. Shaikh, Ahmed H. Al-Naggar, Siddheshwar D. Raut, Tabassum Siddiqui, Hamdan M. Danamah, Vijaykumar V. Jadhav, Abdullah M. Al-Enizi, Rajaram S. Mane
Summary: This study explores a promising self-growth approach for the synthesis of nickel hydroxide (Ni(OH)2) nanosponge-balls on the surface of a nickel-foam (NiF) electrode. The modified NiF electrode, named Ni(OH)2@NiF, shows distinctive nanosponge-ball morphology and demonstrates excellent energy storage capability and electrocatalytic performance in both hydrogen and oxygen evolution reactions.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Rafael Del Olmo, Gregorio Guzman-Gonzalez, Oihane Sanz, Maria Forsyth, Nerea Casado
Summary: The use of Lithium-Ion Batteries (LIBs) is becoming increasingly extensive, and it is important to optimize the devices to achieve their maximum practical specific capacity. In this study, mixed ionic-electronic conducting (MIEC) binders based on PEDOT:PSS and PEDOT: PDADMA-TFSI were developed for Li-ion cathodes, and their performance was compared with conventional formulations. The influence of electrode formulations, including the addition of conducting carbon and an Organic Ionic Plastic Cristal (OIPC), was also analyzed. The proposed binders showed improved performance compared to conventional formulations with different electrolyte types and active materials.
ELECTROCHIMICA ACTA
(2024)
