Article
Engineering, Chemical
Zheyu Huang, Jingzhong Kuang, Luping Zhu, Weiquan Yuan, Zhilei Zou
Summary: The study investigated the impact of ultrasound on benzohydroxamic acid (BHA) and found that ultrasound treatment significantly increased the flotation rate difference between scheelite and calcite, leading to effective separation. Ultrasound treatment also increased the adsorption amount and rate between scheelite and BHA, accelerating the flotation rate.
MINERALS ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Weiyin Chen, John Tianci Li, Zhe Wang, Wala A. Algozeeb, Duy Xuan Luong, Carter Kittrell, Emily A. McHugh, Paul A. Advincula, Kevin M. Wyss, Jacob L. Beckham, Michael G. Stanford, Bo Jiang, James M. Tour
Summary: Flash Joule heating (FJH) has been utilized to synthesize different fluorinated carbon allotropes including fluorinated nanodiamonds, fluorinated turbostratic graphene, and fluorinated concentric carbon in a solvent-free manner. The modification of electronic states and the presence of various short-range and long-range orders in these fluorinated carbon allotropes have been confirmed through spectroscopic analysis. The relationship between flash time and phase evolution as well as product compositions has been further demonstrated.
Article
Chemistry, Multidisciplinary
Paul A. Advincula, Jacob L. Beckham, Chi Hun Choi, Weiyin Chen, Yimo Han, Dmitry Kosynkin, Alexander Lathem, Alvaro Mayoral, Miguel Jose Yacaman, James M. Tour
Summary: We demonstrate the synthesis of a solvent- and gas-free 2D carbon nanotube/graphene network through flash Joule heating of pristine carbon nanotubes. The proportion of each morphology in the hybrid material can be controlled by varying the pulse time. Epoxy composites made with the hybrid material show significantly increased hardness and Young's modulus compared to neat epoxy, indicating that flash Joule heating can effectively convert carbon nanotubes into a hybrid network for reinforcement.
Article
Astronomy & Astrophysics
Sudipta Hensh, Stefano Liberati, Vincenzo Vitagliano
Summary: This study investigates the possible perturbations of black hole event horizons induced by matter with spin, and extends the derivation of the Hawking-Hartle formula in the presence of torsion. When focusing on theories with a nonzero component of the torsion tensor, it is found that the tidal heating phenomenon is modified by additional torsion-dependent terms, consistent with previous research based on Jacobson's spacetime thermodynamics approach. These findings have important implications for both phenomenological and theoretical aspects, such as changes in the Bondi mass associated with observed gravitational radiation and modifications to the Hawking radiation spectrum of evaporating black holes.
Article
Optics
Khosro Zangeneh Kamali, Lei Xu, Nikita Gagrani, Hark Hoe Tan, Chennupati Jagadish, Andrey Miroshnichenko, Dragomir Neshev, Mohsen Rahmani
Summary: Metasurfaces with dynamic tunability in their optical behaviour are highly desired for various applications. In this study, we demonstrate electrically tunable metasurfaces driven by thermo-optic effect and flash-heating in silicon. The device allows for video frame rate optical switching over multiple pixels and is compatible with modern electronic display technologies. It shows advantages such as large modulation depth, low optical loss, low input voltage requirement, and high switching speed.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Energy & Fuels
Prashil Badwaik, Shubham Chobe, Ateeque Malani
Summary: The adsorption behavior of crude oil on different reservoir surfaces was investigated, and it was found that the adsorbed light oil has interfacial layers followed by a liquid-like behavior. The interactions between oil molecules and the rock surface were dominated by dispersion and electrostatic forces. The study provides insights for the design of efficient solvents.
Article
Geosciences, Multidisciplinary
A. Zaslavsky
Summary: This study examines the calculation methods for solar wind heating rates and shows that the choice of model functions strongly affects the obtained rates. The authors propose an alternative approach based on monitoring the radial evolution of adiabatic invariants, which eliminates this flaw. Applying this technique to Helios proton data, the study confirms the presence of perpendicular heating in solar wind's protons while no significant change in the parallel adiabatic invariant is observed. The findings suggest that no clear deviation from parallel adiabaticity has been observed for solar wind's protons in the distance range of 0.3-1 AU.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
Emma J. Watson, Gillian M. Turner, Timothy A. Little, Elisa J. Piispa
Summary: This study presents evidence of a rolling hinge evolution for the Mai'iu fault, demonstrating large-scale horizontal-axis rotations consistent with a continental MCC. Through paleomagnetic analysis, the correlation between the uplift and cooling of footwall rocks during the Brunhes chron and the change in fault dip is established. Independent estimates of original fault dip from fault-bedding cut-off angles and microseismicity at depth further support the concept of a rolling hinge style of rotation during the fault slip history.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geography, Physical
Weitao Wang, Rong Huang, Ying Wu, Kang Liu, Zhuqi Zhang, Yipeng Zhang, Caicai Liu, Dewen Zheng, Peizhen Zhang
Summary: Paleomagnetic investigation on the Cretaceous-Tertiary basalt sequences in the West Qinling Mountain reveals two episodes of extrusive volcanism and indicates a clockwise rotation of 10-20 degrees occurring after 15 Ma. Combined with previous estimations, it suggests that two-stage clockwise tectonic rotation occurred in different parts of the northeastern Tibetan Plateau due to different deformational kinematics. The Eocene clockwise rotation is likely driven by inboard extension, while the mid-Miocene clockwise rotation is associated with crustal right lateral shear during the growth of the plateau.
GLOBAL AND PLANETARY CHANGE
(2023)
Review
Chemistry, Multidisciplinary
Kevin M. Wyss, Duy Xuan Luong, James M. Tour
Summary: This article reviews the current industrial methods for synthesizing and analyzing graphene, as well as recent advancements in larger-scale or sustainable synthesis of graphene. It focuses on the use of flash Joule heating as a rapid, efficient, and scalable method for producing graphene and other 2D nanomaterials.
ADVANCED MATERIALS
(2022)
Article
Physics, Applied
Takahiro Baba, Tetsuya Baba, Kazuko Ishikawa, Takao Mori
Summary: A new analysis approach for determining the thermal diffusivity of thin films using ultrafast laser flash methods was proposed in this study, which includes an exact solution expressed by Fourier series for the temperature response after periodic pulse heating. This method enhances robustness in determining thermal diffusivity by analyzing signals observed after periodic pulse heating and fitting them with analytical equations.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Yang He, Jian Liu, Jian-hua Liu, Chun-lin Chen, Chang-lin Zhuang
Summary: The effects of microwave heating on the carbothermal reduction characteristics of oxidized Mn ore for producing FeMn were investigated. Results showed that carbothermal reactions under microwave heating proceeded more extensively and faster compared to conventional heating, with metal phases observed only under microwave heating. The study suggested that microwave heating could enhance the reduction efficiency of MnO to Mn.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Engineering, Environmental
Yishu Qiu, Zheng Hu, Hui Li, Qianqian Ren, Yanan Chen, Shi Hu
Summary: In this study, Ag/Co/C hybrid electrocatalyst for oxygen reduction reaction (ORR) was successfully synthesized via radiative flash Joule heating. The hybrid catalyst exhibits higher activity and stability in alkaline media compared to commercial Pt/C due to the strong interaction between silver and cobalt.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Yuanzheng Lou, Li Guan, Yanke Wang, Xuemeng Zhou, Mingliang Li, Biao Zhao, Qiancheng Gao, Xinyue Zhang, Hailong Wang, Rui Zhang
Summary: (MgCoNiCuZn)O high-entropy oxide (HEO) composites with chemically uniform single rock-salt structure were successfully synthesized using a microwave heating process. By heating at temperatures ranging from 650 to 1200 degrees C for 30 minutes with a step of 50 degrees C, the (MgCoNiCuZn)O composites could be prepared above 850 degrees C within 1 hour. The heating behaviors and reaction mechanisms under microwave irradiation were studied using XRD, SEM, and DTA-TG techniques.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Coatings & Films
Peter Renner, Hong Liang
Summary: This research analyzes the corrosion performance of coatings developed by flash heating and finds that the gas flow rate and the combination of composition and current have significant effects on corrosion performance.
SURFACE & COATINGS TECHNOLOGY
(2022)