Article
Chemistry, Physical
Jeong Woo Shin, Seongkook Oh, Sungje Lee, Dohyun Go, Joonsuk Park, Hyong June Kim, Byung Chan Yang, Gu Young Cho, Jihwan An
Summary: Surface modification of electrodes is crucial for improving the performance of low-temperature solid oxide fuel cells. The ALD CeO2-coated Pt anode structure showed a significant improvement in anode kinetics, leading to a decrease in activation resistance and an increase in maximum power density.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Kleitos Panagi, Christian J. Laycock, James P. Reed, Alan J. Guwy
Summary: This study investigates the effects of biohythane mixtures on the electrical performance and fuel processing of a SOFC, showing that blending H2/CO2 with CH4 to make biohythane can significantly increase SOFC efficiency and durability while reducing CH4 consumption.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Electrical & Electronic
Kazuki Ueda, Sang-Hyo Kweon, Hirotaka Hida, Yoshiharu Mukouyama, Isaku Kanno
Summary: Transparent piezoelectric microdevices were realized by depositing Pb(Zr,Ti)O3 (PZT) thin films on fluorine-doped tin oxide (FTO)-coated glass substrates using radio frequency (RF) magnetron sputtering and sol-gel methods. The transparent PZT thin films exhibited polycrystalline perovskite structure with good piezoelectric properties, showing a clear converse piezoelectric effect with a coefficient ranging between 2.8 and 5.0 C/m2.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Review
Chemistry, Multidisciplinary
Tian Wu, Wei Dai, Meilu Ke, Qing Huang, Li Lu
Summary: Solid-state thin-film mu-batteries are micro-sized energy storage devices with high safety and increased capacity, which face various scientific and technical challenges before practical application. Understanding ion transfer in solid-state electrolytes and the effects of chemistry on electrochemical behaviors is crucial for the development of these batteries.
Article
Nanoscience & Nanotechnology
Wuxiang Feng, Wei Wu, Zeyu Zhao, Joshua Y. Gomez, Christopher J. Orme, Wei Tang, Wenjuan Bian, Cameron Priest, Frederick F. Stewart, Congrui Jin, Dong Ding
Summary: Ultrasonic spray coating (USC) is a promising technology for scalable production of large-sized solid oxide electrochemical cells, with advantages in cost-effectiveness, scalability, quality consistency, and low material waste. However, previous studies on USC parameter optimization lack discussion on systematic, facile, and practical approaches. In this study, an USC optimization process aided by mathematical models is proposed, resulting in optimal settings for high-quality oxygen electrode films within a time range of 27μm/min. The USC-fabricated electrolytes and oxygen electrodes demonstrate desirable performance in protonic ceramic electrochemical cells, achieving high power density and minimal degradation over 200 hours.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Yu -Jen Hsiao, Yempati Nagarjuna, Guo-Yu Huang, Meichun Lin
Summary: Synthesis of Tungsten (W) doped ZnO nanostructure on MEMS device by co-sputtering process. Different doping concentrations ranging from 0% W to 4% W were developed and characterized using SEM, XRD, and EDS analysis. Sensing properties for H2 gas at different concentrations and working temperatures were tested, and 3% W doped ZnO showed good gas sensing response and selectivity over H2 gas at 150 degrees C.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Matthew P. Wells, Adam J. Lovett, Thomas Chalklen, Federico Baiutti, Albert Tarancon, Xuejing Wang, Jie Ding, Haiyan Wang, Sohini Kar-Narayan, Matias Acosta, Judith L. MacManus-Driscoll
Summary: This study demonstrates the growth of epitaxial cathode materials on commercially supplied substrate, as well as the creation of high-performance micro-solid oxide fuel cells through a specific fabrication process.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Madison Olson, Jacob Wheaton, Mary Okkema, Nicholas Oldham, Steve W. Martin
Summary: Na4P2S7-6xO4.62xN0.92x (NaPSON) glassy solid electrolytes (GSEs) were studied for their electrochemical properties and processability into thin films. The x = 0.2 composition (NaPSON-2) showed high conductivity, non-crystallizability, stability against Na-metal, and support for symmetric cell cycling. Thin films of NaPSON-2 exhibited unchanged conductivity and slow growth in resistance, while NaPSON-2 disc displayed stability and reaction products in the bulk. The surface stability was attributed to the segregation of trigonally coordinated nitrogen.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Nicolas Godard, Patrick Grysan, Emmanuel Defay, Sebastjan Glinsek
Summary: Chemical solution deposition (CSD) is a well-known process for making metal oxide functional layers like PZT thin films, which exhibit improved electromechanical response in the presence of {100} orientation. A comparative study of solvents used for CSD shows that PbTiO3 seed layers derived from 1-methoxy-2-propanol are more efficient in promoting {100} orientation and enhancing electrical and piezoelectric properties compared to those derived from 2-methoxyethanol.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Automation & Control Systems
Zhifei Han, Fen Xu, Jun Hu, Jinliang He
Summary: This article presents a MEMS-based microelectric field sensor that converts electric field into differential voltage signal for measurement, with high resolution and wide range.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Chemistry, Analytical
Sadia Farjana, Mohamadamir Ghaderi, Sofia Rahiminejad, Sjoerd Haasl, Peter Enoksson
Summary: The dry film photoresist fabrication method can be used for realizing waveguides and passive components operating at millimeter-wave frequencies, offering advantages over traditional processes. The ridge gap waveguide resonator fabricated with SUEX dry film has low attenuation and high Q-values.
Article
Nanoscience & Nanotechnology
Gene Yang, Sang-Hoon Nam, Gina Han, Nicholas X. Fang, Dongkyu Lee
Summary: This study presents a novel architectural design for a superior cathode with fast oxygen reduction reaction (ORR) activity. By utilizing a combination of 3D printing technique and pulsed laser deposition (PLD), 3D micro-nano structures with desired shape were successfully fabricated. The experimental results show significantly enhanced oxygen surface exchange coefficients and uniform film deposition on these structures.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Ceramics
Han-Yin Liu, Yu-Jie Liao, Hung-Yi Wu
Summary: This study investigates the deposition of InSnZnO thin films using mist chemical vapor deposition with different nitrogen/oxygen ratios of carrier gases. The results show that using nitrogen as the carrier gas leads to the highest field-effect mobility, and using a mixed nitrogen/oxygen carrier gas improves the electrical characteristics of the films.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Valentin Sallaz, Sylvain Poulet, Jouhaiz Rouchou, Jean-Marc Boissel, Isabelle Chevalier, Frederic Voiron, Yann Lamy, Sami Oukassi
Summary: Nanometric amorphous TiO2 films with a thickness of 6-21 nm were studied in liquid- and solid-state electrolyte. The films showed a volumetric capacity that approached the theoretical value and displayed a constant initial amount of intercalated lithium ions after LiPON deposition. Additionally, a hybrid micro-supercapacitor was successfully fabricated with a TiO2 film, achieving an operating voltage window of 3 V and a high surface capacitance.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Fei Hu, Zhuo Li, William C. West, Wyatt E. Tenhaeff
Summary: This study reports the development of thin film cathodes based on LRCO for solid-state Li metal thin-film batteries. These thin film cathodes, prepared by RF sputtering, exhibit excellent energy storage performance without the need for thermal annealing. The nanocrystalline LRCO demonstrates a higher discharge capacity compared to the state-of-art LiCoO2 thin-film cathode. The feasibility of fabricating and performance on flexible thermoplastic substrates is also demonstrated.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Qiuhua Liang, Anja Bieberle-Hutter, Geert Brocks
Summary: This study uses density functional theory to simulate the catalytic mechanism of RuO2 catalyst in water splitting. It is found that the antiferromagnetic RuO2 surface has a low overpotential and is insensitive to the coverage of O and OH, making it a suitable catalyst for the oxygen evolution reaction.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Jelena Wohlwend, Alla S. Sologubenko, Max Doebeli, Henning Galinski, Ralph Spolenak
Summary: This study presents a scalable design and fabrication strategy for large-area metamaterials, demonstrating how frequency-selective absorption can be controlled and designed through experiments and simulations. The research found a linear relationship between optical response and tin content, and that the absorbing state is sensitive to changes in network topology and chemistry. Additionally, the study probed the plasmonic response of nanometric networks using electron energy loss spectroscopy, revealing extremely confined gap surface-plasmon (GSP) modes.
Correction
Chemistry, Physical
Kiran George, Matthijs van Berkel, Xueqing Zhang, Rochan Sinha, Anja Bieberle-Huetter
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Marius A. Wagner, Fabian Schwarz, Nick Huber, Lena Geistlich, Henning Galinski, Ralph Spolenak
Summary: Mechanical metamaterials with complex unit cell architectures can achieve extraordinary mechanical properties. Deformation-induced transitions in nodal topology by internal self-contact can generate highly non-linear stiffening effects.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Jose L. Ocana-Pujol, Lea Forster, Ralph Spolenak, Henning Galinski
Summary: This study investigates the thermal and optical stability of hyperbolic metamaterials using experiments and simulations. The results show that although thermal instability occurs at 300 degrees C, the hyperbolic dispersion persists up to 500 degrees C. Analysis of tomographical data reveals the contributions of interfacial and elastic strain energy to the instability, and suggests possible approaches to designing hyperbolic metamaterials that can withstand high temperatures.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Physical
Qiuhua Liang, Geert Brocks, Anja Bieberle-Hutter
Summary: Magnetic exchange force microscopy (MExFM) is used to map the magnetic structure of surfaces at atomic resolution. In this study, the researchers theoretically investigate whether MExFM can visualize the magnetic surface structure of RuO₂. Density functional theory calculations are used to analyze the exchange interactions between a ferromagnetic Fe tip and an antiferromagnetic RuO₂(110) surface. The results show a noticeable height difference between spin-up and spin-down Ru atoms in the surface, while the O atoms are hardly visible.
Article
Materials Science, Multidisciplinary
Erik Poloni, Henning Galinski, Florian Bouville, Bodo Wilts, Leonid Braginsky, David Bless, Valery Shklover, Alba Sicher, Andre R. Studart
Summary: The use of distributed microplatelets for light reflection is an effective way to create color and control optical properties in paints, security features, and optical filters. However, the design and manufacturing of these composite materials are limited due to the complex light-matter interactions that determine their optical response. This study experimentally investigates and analytically calculates the optical reflectance of individual reflective microplatelets and polymer-based composites containing these engineered platelets.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Multidisciplinary Sciences
Bart F. H. van den Boorn, Matthijs van Berkel, Anja Bieberle-Hutter
Summary: Chemical models rely on parameters, each with its own uncertainty, and sensitivity analysis is a valuable tool to quantify and trace this uncertainty. This study presents the use of Sobol's variance-based method as a framework for analyzing microkinetic modeling. Two case studies demonstrate its success in quantifying the influence of input parameters on output uncertainties.
ADVANCED THEORY AND SIMULATIONS
(2023)
Article
Chemistry, Multidisciplinary
Joan Sendra, Fabian Haake, Micha Calvo, Henning Galinski, Ralph Spolenak
Summary: Strain-engineering of materials leads to optical anisotropy, but the current capability to image and map local strain fields is limited. This study introduces a phase-sensitive multi-material optical platform, a broadband scanning reflectance anisotropy microscope, for strain mapping. The microscope produces hyperspectral images with high resolution and demonstrates cutting edge strain sensitivity. It opens up the possibility for non-destructive mechanical characterization of multi-material components.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Iacopo Mattich, Joan Sendra, Henning Galinski, Golnaz Isapour, Ahmet F. Demirors, Marco Lattuada, Simone Schuerle, Andre R. Studart
Summary: The assembly of superparamagnetic colloids inside droplets under rotating magnetic fields is studied, and this phenomenon is exploited to create functional optical devices.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jelena Wohlwend, Georg Haberfehlner, Henning Galinski
Summary: Self-assembly processes provide a scalable and versatile approach for the fabrication of metamaterials. However, the exploration of complex multi-phase metamaterials through self-assembly is limited. This study proposes a new approach called sequential self-assembly (SSA) to create a two-phase metamaterial (TPM) consisting of a disordered network metamaterial with embedded nanoparticles. Using electron energy loss spectroscopy (EELS), the researchers observed inhomogeneous localization of light in the network and dipolar and higher-order localized surface plasmon modes in the nanoparticles. The observed energy exchange between the two phases offers opportunities for plasmon-enhanced catalysis in these disordered systems.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Mirco Nydegger, Adam Pruska, Henning Galinski, Renato Zenobi, Alain Reiser, Ralph Spolenak
Summary: Electrohydrodynamic redox 3D printing (EHD-RP) is an additive manufacturing technique that enables on-the-fly chemistry switching during deposition, with submicron resolution and multi-metal capabilities. By using aqueous solvents instead of organic solvents, the materials palette for EHD-RP can be expanded, allowing reproducible deposition of metals such as Cu and Zn. Additionally, the deposited Zn structures can be partially transformed into semiconducting ZnO structures through oxidation.
Article
Multidisciplinary Sciences
Ahmet F. Demiroers, Erik Poloni, Maddalena Chiesa, Fabio L. Bargardi, Marco R. Binelli, Wilhelm Woigk, Lucas D. C. de Castro, Nicole Kleger, Fergal B. Coulter, Alba Sicher, Henning Galinski, Frank Scheffold, Andre R. Studart
Summary: In this study, a 3D printing platform for the assembly of colloidal particles of silica and carbon with programmable structural color is proposed. The printing parameters and ink composition are optimized to achieve objects with tunable structural color. Multimaterial printing is used to create complex-shaped objects with multiple structural colors, offering a new approach for mimicking structural color in natural systems.
NATURE COMMUNICATIONS
(2022)
Review
Chemistry, Multidisciplinary
Bipasa Samanta, Angel Morales-Garcia, Francesc Illas, Nicolae Goga, Juan Antonio Anta, Sofia Calero, Anja Bieberle-Hutter, Florian Libisch, Ana B. Munoz-Garcia, Michele Pavone, Maytal Caspary Toroker
Summary: Understanding the water splitting mechanism in photocatalysis is crucial for producing clean fuel in the future. Different theoretical methods at various scales have strengths and drawbacks, and a combination of methods is needed to model complex nano-photocatalysts accurately.
CHEMICAL SOCIETY REVIEWS
(2022)
Article
Chemistry, Physical
V Sinha, D. Sun, E. J. Meijer, T. J. H. Vlugt, A. Bieberle-Hutter
Summary: Hematite, a cheap and sustainable semiconductor material, is suitable for studying OER. A multiscale computational model connecting thermodynamics and kinetics of reactions at atomic level to experimentally measured quantities provides insights into the design of energy efficient anodes.
FARADAY DISCUSSIONS
(2021)
