Article
Engineering, Electrical & Electronic
D. Sahoo, P. Priyadarshini, R. Dandela, D. Alagarasan, R. Ganesan, S. Varadharajaperumal, Ramakanta Naik
Summary: This study investigates the phase transformation and optical properties of As50Se50 thin films upon annealing at different temperatures. The structural changes and optical behavior varied significantly between the annealing temperatures of 423K and 523K.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Yangyu Zhou, Wei Fang, Lina Wang, Xiaoqing Zeng, Dong H. Zhang, Mingfei Zhou
Summary: We report the presence of concerted heavy-atom tunneling in an oxygen-oxygen bond breaking reaction from cyclic beryllium peroxide to linear dioxide in a cryogenic Ne matrix, supported by temperature-dependent reaction kinetics and large kinetic isotope effects. Furthermore, we demonstrate that the tunneling rate can be influenced by noble gas atom coordination on the electrophilic beryllium center. Quantum chemistry and instanton theory calculations reveal that noble gas coordination stabilizes the reactants and transition states, leading to higher barrier heights and widths, thus significantly reducing the reaction rate.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Vicente Timon, Belen Mate, Victor J. Herrero, Isabel Tanarro
Summary: This study investigates the infrared spectra of urea ices and urea:H2O ice mixtures both experimentally and theoretically, providing valuable information for the detection and quantification of urea in astrophysical ices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Bijesh K. Malla, Gaurav Vishwakarma, Soham Chowdhury, Premkumar Selvarajan, Thalappil Pradeep
Summary: This study investigates the existence of ethane clathrate hydrates in ultrahigh vacuum and cryogenic conditions, and observes the formation process of ethane clathrate hydrates from amorphous ethane-water ice mixtures for the first time. This has important implications for understanding the presence of clathrate hydrates in cometary environments.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Crystallography
Hsiang-An Ting, Yong-Yu Chen, Zong-Ming Li, Ya-Ping Hsieh, Sheng-Kuei Chiu, Chu-Chi Ting
Summary: This study investigates the crystallization and optical properties of sol-gel produced Y2Ti2O7 thin layers. The results show a transition of the amorphous pyrochlore phase at annealing temperatures below 700 degrees C. The annealed Y2Ti2O7 thin layers exhibit high transmittance and varying refractive indices, packing densities, and optical bandgap energies.
Article
Optics
Sahana Nagappa Moger, Pawan Kumar, Gowrish K. Rao, M. G. Mahesha
Summary: CdS films were deposited on glass substrates using thermal evaporation method at room temperature. The effect of air annealing on the structural, optical, and electrical properties of the films was investigated. It was found that annealing improved the film's structure and electrical properties, making it suitable for visible range photodetectors.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Physics, Applied
Mengzhen Hu, Lei Xu, Xinnan Zhang, Hanyuan Hao, Shi Zong, Haimin Chen, Zengcai Song, Shijun Luo, Zhihua Zhu
Summary: In this study, we fabricated amorphous InSnO thin film transistors (TFTs) with high mobility and low thermal budget. The influence of thermal annealing on the properties of InSnO TFTs was investigated. The results show that annealing at 150 degrees C can significantly improve the carrier concentration and form a dense M-O-M network in the film. This research expands the application of amorphous oxide semiconductors in high mobility and flexible TFTs.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Zibing Yu, Houbo Zhou, Fengxia Hu, Chang Liu, Shuaikang Yuan, Donghui Wang, Jiazheng Hao, Yihong Gao, Yangxin Wang, Bingjie Wang, Zhengying Tian, Yuan Lin, Cheng Zhang, Zhuo Yin, Jing Wang, Yunzhong Chen, Yunliang Li, Jirong Sun, Tongyun Zhao, Baogen Shen
Summary: This study reports a colossal barocaloric effect achieved by utilizing high entropy amorphous polyethylene glycol (PEG). By introducing polyethylene terephthalate (PET) to solidify PEG while retaining high entropy, a significant barocaloric entropy change is achieved. This research paves the way for exploring full solid-state barocaloric materials by utilizing the large disordering of liquid phases.
NPG ASIA MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Feiyu Xu, Brandon Wagner, Pankaj Ghildiyal, Lorenzo Mangolini, Michael R. Zachariah
Summary: The thermal oxidation of sub-10-nm silicon nanoparticles was studied to compare the oxidation behavior of crystalline and amorphous silicon particles. Nonisothermal kinetic analysis showed that amorphous silicon nanoparticles have a significantly lower activation energy for oxidation compared to crystalline particles. In situ heating diffuse reflectance infrared Fourier transform spectroscopy revealed that backbond oxidation of higher hydrides and the presence of surface O3Si-H and Si-OH species contribute to the low temperature oxidation behavior of amorphous silicon nanoparticles.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Astronomy & Astrophysics
Rebecca A. Carmack, Patrick D. Tribbett, Mark J. Loeffler
Summary: This study finds that the internal pores of ASW can be accessed from the surface, regardless of the thickness of the ice mantle. The amount of gas needed to fill the pores increases linearly with the ASW column density, suggesting that the interconnectivity to the surface remains even in thicker ice formations. This has important implications for the chemical evolution of ASW-rich surfaces in the outer solar system.
ASTROPHYSICAL JOURNAL
(2023)
Article
Chemistry, Physical
Benjamin B. Rich, Yael Etinger-Geller, Gianluca Ciatto, Alexander Katsman, Boaz Pokroy
Summary: Size effects and structural modifications in amorphous TiO2 films deposited by ALD are strongly dependent on film thickness, resulting in changes in chemical state, particularly with higher concentrations of Ti+3 species and oxygen vacancies in the thin near-surface layer. This is attributed to the ALD deposition process and surface structure maintenance over multiple cycles, leading to an overall decrease in film density.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Angang Song, Yiwen Wang, Suxiang Liu, Qinpu Wang, Junhua Hu
Summary: In this study, niobium-doped SnO2 transparent conductive oxides were deposited on glass substrates using remote plasma sputtering at ambient temperature without annealing. The films were characterized using advanced techniques and it was found that oxygen defects significantly affected their transparent conductivity. Crystalline films had higher resistivities due to decreased oxygen vacancies, while amorphous films exhibited remarkable conductivity.
Article
Physics, Applied
Henry T. Aller, Alan J. H. McGaughey, Jonathan A. Malen
Summary: Rapid thermal annealing significantly improves the thermal conductivity of amorphous alumina thin films and reduces the thermal boundary resistance of adjacent interfaces, which promotes heat spreading and enhances device longevity.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Paige C. Kinsley, Aiping Zeng, Jenny K. Heblund Orbeck, Shaun Debow, Zachary B. Zander, Patrick J. Heaney, Robert J. Hamers
Summary: A method using plasma-deposited carbon to suppress phosphine and acidic phosphorus production on red phosphorus particles has been developed. The study found that increasing deposition time can result in thicker and more uniform carbon coatings, leading to a significant decrease in phosphine generation and surface phosphorus oxide formation.
APPLIED SURFACE SCIENCE
(2022)
Article
Astronomy & Astrophysics
C. Koike, H. Chihara
Summary: Amorphous silicate samples with enstatite and forsterite compositions were synthesized by mechanical milling of SiO2-MgO and SiO2-Mg(OH)2 mixtures. The presence of H2O or OH bonds significantly influenced the final products after crystallization, with enstatite compositions transforming into forsterite with small amounts of amorphous silica SiO2 and enstatite, while forsterite compositions remained as forsterite. These findings suggest the importance of water content in the synthesis of amorphous silicates.
ASTROPHYSICAL JOURNAL
(2023)
Article
Chemistry, Applied
A. Luna-Triguero, J. M. Vicent-Luna, M. J. Jansman, G. Zafeiropoulos, M. N. Tsampas, M. C. M. van de Sanden, H. N. Akse, S. Calero
Summary: This study proposes a zeolite-based separation process to obtain carbon dioxide-neutral fuels and chemicals, combining separation efficiency with low costs. By calculating the separation behavior of mixtures generated by plasmolysis of CO2, a purification process design based on multicomponent adsorption and separation in commercially available zeolites is provided, with NaX and NaY identified as the most suitable zeolites for separation under a wide range of operating conditions.
Review
Physics, Applied
A. Bieberle-Hutter, A. C. Bronneberg, K. George, M. C. M. van de Sanden
Summary: This paper discusses the application of operando attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopy for water splitting, focusing on opportunities, challenges, recent results, and future perspectives. Stable and robust operando ATR-FTIR measurements revealed changes in surface species during water oxidation. Combining ATR-FTIR measurements with microkinetic modeling enables identification of the reaction mechanism in water splitting and accelerates the development of tailored catalysts.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Rakesh K. Sharma, Hrishikesh Patel, Usman Mushtaq, Vasileios Kyriakou, Georgios Zafeiropoulos, Floran Peeters, Stefan Welzel, Mauritius C. M. van de Sanden, Mihalis N. Tsampas
Summary: Ammonia is an essential precursor for fertilizers and a potential carbon-free energy carrier. A sustainable method for producing ammonia from nitrogen and water using a plasma-activated proton conducting solid oxide electrolyzer has been proposed. This method achieves high ammonia production rates and Faradaic efficiencies.
ACS ENERGY LETTERS
(2021)
Article
Chemistry, Physical
Ruoyu Zhang, Gerben van Straaten, Valerio di Palma, Georgios Zafeiropoulos, Mauritius C. M. van de Sanden, Wilhelmus M. M. Kessels, Mihalis N. Tsampas, Mariadriana Creatore
Summary: This study conducts an in-depth investigation on the electrochemical activation of CoPi-based catalysts, demonstrating that the pristine chemical composition strongly influences its activity in the OER, as well as its changes after prolonged exposure to the electrolyte. The activated CoPi films show an increase in electrochemical active surface area with the number of CV cycles, while phosphorous progressively leaches out from the film.
Article
Electrochemistry
Sathiyaraj Kandhasamy, Georgios Nikiforidis, Gert Jan Jongerden, Ferdy Jongerden, Mauritius C. M. van de Sanden, Mihalis N. Tsampas
Summary: By retuning the catholyte formulation of the intermediate temperature sodium-sulfur battery, lowering the operating temperature and improving cell design, the cell performance was significantly boosted, demonstrating for the first time the practicality of the tubular IT-NaS technology at a temperature as low as 125 degrees C.
Article
Chemistry, Physical
Ilker Tezsevin, Mauritius C. M. van de Sanden, Suleyman Er
Summary: This study performed density functional theory calculations to generate oxygen vacancy formation energy data for a range of cubic perovskite materials, and calculated area-specific resistance data related to oxygen reduction reaction and oxygen ion conductivity. By screening 31 candidate perovskites, the study identified materials with properties between state-of-the-art SOFC cathode and oxygen permeation components. The research also presented an intuitive approach to estimate complex perovskite data by using simple perovskite data, aiming to boost future explorations in diverse energy applications.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Physics, Applied
G. Raposo, A. W. van de Steeg, E. R. Mercer, C. F. A. M. van Deursen, H. J. L. Hendrickx, W. A. Bongers, G. J. van Rooij, M. C. M. van de Sanden, F. J. J. Peeters
Summary: This study quantifies the CO flame band emission in CO2 microwave plasma and reveals a contribution of O-2 Schumann-Runge UV emission at high temperatures. Further analysis demonstrates the high energy efficiency of CO flame band emission at T < 1500K.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Physics, Fluids & Plasmas
P. Viegas, L. Vialetto, A. W. van de Steeg, A. J. Wolf, W. A. Bongers, G. J. van Rooij, M. C. M. van de Sanden, P. Diomede, F. J. J. Peeters
Summary: A method is proposed to spatially resolve discharge parameters using experimental measurements and 1D numerical simulations. The results show that radially-resolved parameters obtained numerically can explain high reactor performances in CO2 conversion.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Alex van de Steeg, Pedro Viegas, Ana Silva, Tom Butterworth, Alexander van Bavel, Joost Smits, Paola Diomede, Mauritius van de Sanden, Gerard van Rooij
Summary: This study investigates the reduction of CO2 to CO for sustainable fuel production in high-temperature microwave plasma, revealing rapid mass and energy transfer mechanisms between products and feedstock, as well as the importance of new CO2 chemistry rate coefficients. Reactor design improvements based on the identified enhancement mechanisms could potentially increase efficiency up to the newly defined thermal limit of 70%.
ACS ENERGY LETTERS
(2021)
Article
Chemistry, Physical
Georgios Zafeiropoulos, Purushothaman Varadhan, Hannah Johnson, Lars Kamphuis, Arunkuman Pandiyan, Sachin Kinge, Mauritius C. M. van de Sanden, Mihalis N. Tsampas
Summary: This study addresses the challenges of depositing narrow band gap metal-oxides on porous substrates as suitable photoelectrodes for PEM-PEC configuration, achieving a high photocurrent density with W-doped BiVO4 photoanode. The successful integration of BiVO4 into PEM-PEC reactor demonstrates solar hydrogen production from ambient air, showing promise for low-cost and large-scale solar hydrogen production.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
A. W. van de Steeg, L. Vialetto, A. F. Sovelas da Silva, P. Viegas, P. Diomede, M. C. M. van de Sanden, G. J. van Rooij
Summary: Thermalization of electron and gas temperature in CO2 microwave plasma is revealed for the first time through Thomson scattering measurements. The results contradict the prevailing understanding of increasing electron temperature causing discharge contraction. The study demonstrates that associative ionization of radicals plays a significant role in the thermalization process of the plasma, providing a basis for ab initio prediction of power concentration in plasma reactors.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Physics, Fluids & Plasmas
L. Vialetto, A. W. van de Steeg, P. Viegas, S. Longo, G. J. van Rooij, M. C. M. van de Sanden, J. van Dijk, P. Diomede
Summary: This work investigates the kinetics and transport of CO2 microwave plasmas through simulation results and experiments. The simulation results are validated against experimental measurements and the study reveals the effects of gas heating and charged species variation at different pressures.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Hanyu Ma, Rakesh K. Sharma, Stefan Welzel, Mauritius C. M. van de Sanden, Mihalis N. Tsampas, William F. Schneider
Summary: This study investigates the synergy between heterogeneous catalysts and non-thermal plasma. Through experimental evidence and reactor model construction, it is revealed that neither catalyst nor plasma alone is productive, but their combination can generate nitrogen oxides. The study provides clear evidence for the synergy between heterogeneous catalysts and non-thermal plasma, and highlights the importance of their combined use.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Applied
V. Guerra, T. Silva, N. Pinhao, O. Guaitella, C. Guerra-Garcia, F. J. J. Peeters, M. N. Tsampas, M. C. M. van de Sanden
Summary: This work discusses the potential of combining non-thermal plasmas and conducting membranes for in situ resource utilization on Mars by converting molecules from the Martian atmosphere to create necessary feedstock and base chemicals. Different plasma sources operate on different principles and mechanisms, allowing for exploration of various energy transfer pathways for CO2 dissociation. The coupling of plasmas with membranes is anticipated to have a synergistic effect for high rates of production of molecules per kilogram of instrumentation sent to space.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Usman Mushtaq, Stefan Welzel, Rakesh K. Sharma, M. C. M. van de Sanden, Mihalis N. Tsampas
Summary: A method to overcome fabrication challenges for the development of efficient and robust electrode-supported P-SOCs (protonic ceramic solid oxide cells) was discussed. The study optimized material synthesis and fabrication procedures and evaluated the performance and stability of the cells.
ACS APPLIED MATERIALS & INTERFACES
(2022)