Article
Thermodynamics
Mohit Pushp, Anders Lonnermark, Mikael Hedenqvist, Peter Vikegard
Summary: This study developed a method to measure and characterize the heat production in MSW, showing that heat flow in the waste increased with temperature up to 60 degrees C but decreased at higher temperatures. Oxygen consumption and carbon dioxide production indicated that aerobic metabolism was responsible for heat production.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Nanoscience & Nanotechnology
Mallory N. Vila, Edelmy Marin Bernardez, Wenzao Li, Chavis A. Stackhouse, Christopher J. Kern, Ashley R. Head, Xiao Tong, Shan Yan, Lei Wang, David C. Bock, Kenneth J. Takeuchi, Lisa M. Housel, Amy C. Marschilok, Esther S. Takeuchi
Summary: This study investigates the influence of silicon particle size, electrode composition, and electrolyte additives on the heat generation during silicon lithiation. The results show that nanosized silicon electrodes generate more heat compared to micrometer-sized silicon electrodes, and the introduction of amorphous carbon significantly alters the heat flow profile. Furthermore, different electrolyte additives also play a role in heat generation.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Nanoscience & Nanotechnology
Mallory N. Vila, Edelmy Marin Bernardez, Wenzao Li, Chavis A. Stackhouse, Christopher J. Kern, Ashley R. Head, Xiao Tong, Shan Yan, Lei Wang, David C. Bock, Kenneth J. Takeuchi, Lisa M. Housel, Amy C. Marschilok, Esther S. Takeuchi
Summary: In this study, the heat flow during silicon lithiation was investigated using isothermal microcalorimetry, and the composition of the solid electrolyte interphase was elucidated using complementary techniques. The research found that nanosized silicon electrodes generate more heat than micrometer-sized ones, and the introduction of amorphous carbon significantly alters the heat flow profile. Vinylene carbonate is an effective electrolyte additive that increases the heat dissipation of the electrode.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Microbiology
Anabel E. Gruetter, Tecla Lafranca, Aurelia Pahnita Sigg, Max Mariotti, Gernot Bonkat, Olivier Braissant
Summary: The study used isothermal microcalorimetry (IMC) to monitor the growth and drug susceptibility of Neisseria gonorrhoea. Results showed that concentrations of N. gonorrhoea between 2000 and 1 CFU/mL could be detected within 12 to 33 hours, and drug susceptibility could be easily monitored. Overall, IMC provides a useful tool for detecting and characterizing fastidious microbes like N. gonorrhoea.
Article
Energy & Fuels
Yibo Liu, Xinyu Liu, Yuanlong Zhu, Jiawei Wang, Weiwei Ji, Xizheng Liu
Summary: In this study, Si/graphite composites with high capacity and conductivity were prepared using a simplified chemical dealloying and pitch coating process. The composite showed excellent cyclic stability and high energy density, making it a promising anode material for next-generation LIBs.
Article
Physics, Multidisciplinary
Seong-Hun Paeng
Summary: Various entropies have been proposed and studied on the brain network as measures of signal transmission efficiency. To overcome their limitations, we propose a graph entropy based on Boltzmann's entropy for heat flow, which indicates the efficiency of signal transmission at each time. We demonstrate its close relationship with the curvature of a graph.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2022)
Article
Chemistry, Physical
Jayant Sarolia, Deepak Kumar, Shailesh A. Shah, Pratap Bahadur, Sanjay Tiwari
Summary: This study investigates the effect of sugar incorporation on the micellization behavior of a linear triblock copolymer. The results show that the enthalpy barrier of micellization is reduced in the presence of sugar, leading to a decrease in the Gibbs free energy of micellization. These changes are attributed to the modulation of water structures in the micelle interface microenvironment, emphasizing the role of temperature in regulating copolymer-solvent interactions.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Thermodynamics
Rafael Lopez-Cruz, Juan Arturo Ragazzo-Sanchez, Olivier Braissant, Montserrat Calderon-Santoyo
Summary: This study evaluated the effect of microencapsulation by spray drying on the biocontrol agent Meyerozyma guilliermondii using isothermal microcalorimetry and traditional microbiological methods. The results showed that the inlet air temperature and wall material concentration had an impact on the antifungal activity of the encapsulated yeast.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Applied
Yiteng Luo, Liwu Huang, Jianbo Liu, Zerui Wang, Qinghao Chen, Yungui Chen
Summary: To improve the performance of Li-ion batteries, researchers synthesized a p-Si/G@C composite, in which porous silicon was coated on graphite and encapsulated in carbon. It was found that porous silicon with higher porosity and smaller particle size displayed better cycle stability and rate performance in the electrode. With optimized design, the p-Si/G@C composite exhibited excellent cycle stability and high capacity retention.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Thermodynamics
Ximena Martinez-Miranda, Rafael Lopez-Cruz, Aldo Gutierrez, Osiris Alvarez-Bajo, Martin Esqueda, Juan Arturo Ragazzo-Sanchez, Montserrat Calderon-Santoyo
Summary: This study evaluated the metabolism of Ganoderma species grown in liquid medium with different polarities of vineyard pruning extracts. The results showed that native strains had a higher metabolic yield compared to the control strain. Among them, Ganoderma curtisii showed the best response to vineyard pruning extracts, with a shorter lag phase and a significant increase in growth rate. This technique has the potential to determine the concentration and effect time of elicitors that produce liquid cultures of Ganoderma species with higher metabolic activity.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Physics, Multidisciplinary
Nicolas Brodeur, Sean R. Notley, Glen P. Kenny, Andre Longtin, Andrew J. E. Seely
Summary: This article introduces an experimental approach for the continuous measurement of external entropy flow and internal entropy production in humans under heat stress. By using direct and indirect calorimetry, the real-time monitoring of entropy production and flow can improve our understanding of human health and illness.
Article
Chemistry, Multidisciplinary
Amin Ebrahimi, Vahid Shahabi, Ehsan Roohi
Summary: The study investigates the nonequilibrium effects of gas flow and heat transfer at micro-and nanoscales, focusing on pressure-driven nitrogen flow in divergent microchannels with isothermal walls. The results of numerical simulations analyze the thermal fields under different parameters, covering slip to free-molecular rarefaction regimes. The study discusses the interplay between thermal and pressure gradients, as well as the occurrence of thermal separation and anti-Fourier heat transfer in divergent microchannels.
APPLIED SCIENCES-BASEL
(2021)
Article
Multidisciplinary Sciences
Carlos A. Polanco, Ambroise van Roekeghem, Boris Brisuda, Laurent Saminadayar, Olivier Bourgeois, Natalio Mingo
Summary: The thermal conductance quantum is a fundamental quantity in quantum transport theory, but the disagreement between experiments and theory still exists. This study uses massive parallel calculations to find that macroscopic concepts are inadequate to analyze the data, and the temperature distribution and the dimensions and placement of components in the structure significantly affect the measured values of thermal conductance. Additionally, the diffusion transport assumptions in data analysis may lead to considerable differences between the measured values and the actual thermal conductance, calling for experimental validation.
Article
Physics, Multidisciplinary
Hamzeh Haghighatjoo, Mitra Yadegari, Abdolamir Bak Khoshnevis
Summary: This study optimizes the location of a single obstacle and the distance between obstacles in a curved channel using entropy generation analysis and genetic algorithm, aiming to maximize efficiency and minimize entropy loss. The results indicate a significant decrease in entropy generation and an improvement in efficiency in the optimized channels.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Thermodynamics
Majid Khan, S. Z. Shuja, B. S. Yilbas, H. Al-Qahtani
Summary: The design configuration of microchannel heat sinks is crucial for enhancing heat transfer efficiency. This study focuses on the innovative design of a 3D microchannel with turbulators and evaluates its thermal performance under various conditions. The findings suggest that the microchannel with turbulators located at 75% of the channel length with a pitch of 0.75 mm exhibits the highest thermal performance.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Wenzao Li, Mallory N. Vila, Lisa M. Housel, Nahian Sadique, Genesis D. Renderos, Steve Ehrlich, David C. Bock, Lei Wang, Kenneth J. Takeuchi, Esther S. Takeuchi, Amy C. Marschilok
Summary: The global shift towards electricity as the main energy carrier requires innovation in electrochemical energy storage, particularly in overcoming challenges such as cost, life cycle, energy density, and safety. Developing new battery chemistries based on understanding charge transport phenomena is essential, as real-time characterization during battery function can expedite progress in addressing current challenges.
JOURNAL OF MATERIALS RESEARCH
(2022)
Article
Electrochemistry
Christopher R. Tang, Lisa M. Housel, Cynthia Huang, Wenzao Li, Lei Wang, Shan Yan, Esther S. Takeuchi, Amy C. Marschilok, Carlos E. Colosqui, Kenneth J. Takeuchi
Summary: An analytical model is proposed to predict and understand the current response from non-disintegrable solid particles at a rotating disk electrode. The current is limited by ion diffusion within the solid particle and the mean residence time of the particle at the rotating disk electrode, resulting in a relationship between current and angular frequency different from the classical theory.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Mallory N. Vila, Edelmy Marin Bernardez, Wenzao Li, Chavis A. Stackhouse, Christopher J. Kern, Ashley R. Head, Xiao Tong, Shan Yan, Lei Wang, David C. Bock, Kenneth J. Takeuchi, Lisa M. Housel, Amy C. Marschilok, Esther S. Takeuchi
Summary: This study investigates the influence of silicon particle size, electrode composition, and electrolyte additives on the heat generation during silicon lithiation. The results show that nanosized silicon electrodes generate more heat compared to micrometer-sized silicon electrodes, and the introduction of amorphous carbon significantly alters the heat flow profile. Furthermore, different electrolyte additives also play a role in heat generation.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Electrochemistry
Bat-Or Shalom, Miguel A. Andres, Youngseok Yu, Ashley R. Head, Baran Eren
Summary: This study uses graphene-sealed micro-electrochemical cells to monitor the changing oxidation state of Cu nanoparticles using X-ray photoelectron spectroscopy. Graphene ensures an abrupt change between the liquid and vacuum environments and acts as an electrically conducting support material for Cu nanoparticles. The results show that relatively lower flux X-ray sources are sufficient for probing solid-liquid interfaces.
ELECTROCHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Giulio D'Acunto, Roman Tsyshevsky, Payam Shayesteh, Jean-Jacques Gallet, Fabrice Bournel, Francois Rochet, Indiana Pinsard, Rainer Timm, Ashley R. Head, Maija Kuklja, Joachim Schnadt
Summary: The surface chemistry during the initial growth of atomic layer deposition plays a crucial role in the subsequent growth and quality of thin films. However, the understanding of this surface chemistry is still incomplete in many cases. In this study, we carried out an operando atomic layer deposition experiment to investigate the surface chemistry of HfO2 atomic layer deposition on SiO2 from an alkylamido-hafnium precursor and water. The results showed that the decomposition of the metal precursor on the stoichiometric SiO2 surface proceeds via a bimolecular reaction mechanism, leading to the formation of Hf-bonded methyl methylene imine and free dimethylamine.
CHEMISTRY OF MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Calvin D. Quilty, Daren Wu, Wenzao Li, David C. Bock, Lei Wang, Lisa M. Housel, Alyson Abraham, Kenneth J. Takeuchi, Amy C. Marschilok, Esther S. Takeuchi
Summary: This article reviews electrochemical energy storage systems, particularly lithium and lithium-ion batteries, and their widespread use in contemporary society. The critical role of electron and ion transport in battery function is discussed, as well as the various measurement methods used to characterize these processes at different scales. In addition, the article provides a perspective on electrode design and continuum modeling strategies, and highlights the need for fundamental scientific research to advance electrochemical energy storage systems with improved performance.
Article
Chemistry, Physical
Gurpreet Singh, Christopher R. Tang, Andrew Nicoll, Jonah Torres, Lisa M. Housel, Lei Wang, Kenneth J. Takeuchi, Esther S. Takeuchi, Amy C. Marschilok
Summary: In this study, the formation of zinc vanadium oxide (ZVO) and zinc hydroxy-sulfate (ZHS) as discharge products in sodium vanadium oxide (NVO) cathode materials with two different morphologies, NVO(300) and NVO(500), was investigated using ex situ and operando X-ray diffraction methods. It was found that ZHS formation favored higher current densities and was reversible upon charge, while ZVO formation favored lower current densities but persisted throughout cycling. Operando synchrotron-based energy dispersive X-ray diffraction (EDXRD) revealed reversible expansion of the NVO lattice during discharge due to Zn2+ and spontaneous ZVO formation following cell assembly. Spatially resolved EDXRD showed that ZVO formation occurred near the separator region first and then moved to the current collector region as discharge depth increased, while ZHS formation originated from the current collector side of the positive electrode and propagated through the porous electrode network. This study highlights the advantages of the EDXRD method in gaining mechanistic insight into structural evolution within the electrode and at its interface.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Jack E. N. Swallow, Elizabeth S. Jones, Ashley R. Head, Joshua S. Gibson, Roey Ben David, Michael W. Fraser, Matthijs A. van Spronsen, Shaojun Xu, Georg Held, Baran Eren, Robert S. Weatherup
Summary: The reactions of H-2, CO2, and CO gas mixtures on the surface of Cu at 200 ? were investigated using AP-XPS and AtmP-NEXAFS spectroscopy. The order of gas dosing plays a crucial role in the catalyst chemical state, with metallic Cu preserved when H-2 is introduced before CO2. The addition of CO is essential for removing adsorbed oxygen and activating CO2 on the Cu surface, facilitating methanol synthesis.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Calley N. Eads, Tianhao Hu, Yi Tian, Kim Kisslinger, Samuel A. Tenney, Ashley R. Head
Summary: Metal-organic frameworks (MOFs) are versatile materials with intrinsic porosity, and can be used for gas adsorption, separation, and catalysis. In this study, we investigated the adsorption properties and reactivity of thin film derivatives of Zr-O based MOF powders, and explored their potential for different functionalities by incorporating different linker groups and embedded metal nanoparticles. Using transflectance IR spectroscopy, we characterized the active sites and performed metal-based catalysis with a Pt@UiO-66-NH2 film. Our findings demonstrate the utility of surface science techniques in studying the reactivity and chemical/electronic structure of MOFs.
Article
Chemistry, Physical
Burcu Karagoz, Jennifer Carpena-Nunez, Yi Zhu, Lukas Baker, Klaus Attenkofer, Benji Maruyama, Dario Stacchiola, Dmitri N. Zakharov, Ashley R. Head
Summary: Environmental transmission electron microscopy (ETEM) can monitor structural and chemical changes in nanomaterials under reaction conditions. This study demonstrates the customization of a commercial microheater holder used in ETEM to ambient pressure X-ray photoelectron spectroscopy (APXPS), which allows for the characterization of chemical and electronic structure over larger length scales. The use of the microheaters in APXPS enables fast heating capabilities and subsecond time-resolved spectra collection, providing valuable insights into surface chemical reactions.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Tianhao Hu, Sabrina M. Gericke, Xiao Tong, Dmytro Nykypanchuk, Tove Kristensen, Christian Hulteberg, Dario Stacchiola, Sara Blomberg, Ashley R. Head
Summary: The conversion of biomass to transportation fuels and value-added chemicals is a promising method to reduce the reliance on fossil fuels, and Mo-based catalysts have been shown to be highly active in this process. This study investigates the adsorption behavior of an alumina-supported mixed nickel molybdenum oxide catalyst and finds that molybdenum oxide controls the adsorption and reactivity of the surface species with a cooperative effect by nickel.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Farbod Alimohammadi, Darrell Omo-Lamai, Ryan Andris, Timofey Averianov, Zhongling Wang, Lei Wang, Kim Kisslinger, Esther S. Takeuchi, Amy C. Marschilok, Kenneth J. Takeuchi, Ekaterina Pomerantseva
Summary: Enhancements in the charge storage properties of ⍺-MoO3 as an electrode have been achieved by improving electron and ion transport through an innovative synthesis route. The integration of MoO3 with dopamine-derived carbon improved electron transport, while the incorporation of oxygen vacancies in MoO3 structure enhanced ion transport. The strategies developed in this study offer a path to the development of promising materials for high-rate, high-capacity, and long-duration electrochemical energy storage technologies.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Adam M. Hilbrands, Shenli Zhang, Chenyu Zhou, Giacomo Melani, Dae Han Wi, Dongho Lee, Zhaoyi Xi, Ashley R. Head, Mingzhao Liu, Giulia Galli, Kyoung-Shin Choi
Summary: Photoanodes used in a water-splitting photoelectrochemical cell are typically paired with an oxygen evolution catalyst (OEC) to effectively utilize holes generated by photons for water oxidation. It has been found that suppressing electron-hole recombination at the interface between the photoanode and OEC is crucial for maximizing the utilization of holes for water oxidation. Through experimental and computational studies, it has been demonstrated that the detailed features of the interface between the photoanode and OEC significantly impact interfacial charge transfer and photocurrent generation for water oxidation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Zachary R. Mansley, Yimei Zhu, Daren Wu, Esther S. Takeuchi, Amy C. Marschilok, Lei Wang, Kenneth J. Takeuchi
Summary: This study investigates the formation of primary Mn-containing phase in cathode materials cycled in electrolytes with different amounts of MnSO4. The research reveals the mechanistic details of the dissolution-deposition reaction and demonstrates the reaction is limited to the zinc hydroxide sulfate layer.