Article
Mathematics, Applied
Junfeng Xu, Dandan Fan, Tao Zhang
Summary: This study investigated the influences of superheating temperature on the nucleation undercooling of metallic melts through molecular dynamics simulations. The results showed that extremely high heating rates and short equilibration time lead to superheating and partial melting of the solid phase. The proportion of crystalline clusters in the superheated phase depends on the superheating temperature and equilibration time, with a subsequent fast cooling facilitating substantial undercooling of the molten phase.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
L. Richard, Yu. V. Khotyaintsev, D. B. Graham, C. T. Russell
Summary: Plasma jet fronts (JFs) are locations in the Earth's magnetotail where particle acceleration and energy conversion occur, commonly associated with dipolarization fronts (DFs). However, the presence of MHD and kinetic instabilities at JFs can disrupt the front structure, raising questions about the occurrence of solitary DFs.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Thermodynamics
Xi Xi, Hong Liu, Chang Cai, Ming Jia, Xuehu Ma
Summary: This study investigated the boiling vaporization and breakup of single droplets of n-butanol, n-hexadecane and their binary mixtures with 10-50 w.t.% n-butanol. Experimental results showed that bi-component droplets exhibit strong two-phase flow instability, experiencing fluctuation evaporation between the transient heating and stable evaporation stages. The droplet vaporization characteristics gradually shift from normal evaporation to partial rupture or passive breakup, eventually leading to micro explosion and significantly reducing droplet lifetime.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Physical
Ke An, Jingtian Hu, Jianfang Wang
Summary: Plasmonic photocatalysis has attracted attention in enhancing solar-to-chemical conversion efficiency. However, current plasmonic photocatalysts have limited efficiency due to rapid recombination and the Schottky barrier. A new type of plasmonic photocatalyst, the Schottky-barrier-free plasmonic photocatalyst, has been proposed to overcome these limitations.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Physics, Fluids & Plasmas
Xiaolai Li, Yibo Chen, Yuliang Wang, Kai Leong Chong, Roberto Verzicco, Harold J. W. Zandvliet, Detlef Lohse
Summary: Plasmonic bubble nucleation in ternary liquids results in the formation of oil droplet plumes due to the selective evaporation of ethanol and symmetry breaking. Numerical simulations show that a critical Marangoni number Ma leads to the emission of more plumes.
Article
Nanoscience & Nanotechnology
Yao Xu, Jiagen Li, Rulin Liu, Xi Zhu
Summary: This study investigates the rate and severity of plasmonic bubble generation by gold nanoparticles under sunlight illumination, showing that the size and concentration of AuNPs play a role in this process. By building an AuNP nanoengine and controlling the size of AuNPs through an automated experiment robot, the generation of bubbles was controlled and optimized. The research also demonstrates the superstrong energy capacity in AuNP solution, which can continuously output work.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Monosij Mondal, Alexander Semenov, Maicol A. Ochoa, Abraham Nitzan
Summary: Controlling molecular spectroscopy and chemical behavior in a cavity environment is a hot topic. Plasmonic cavities can have strong radiation-matter coupling, even at the level of single molecules. This study presents a method for estimating the radiation-matter coupling and applies it to the calculation of infrared cavities.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Review
Chemistry, Multidisciplinary
Dong Liu, Can Xue
Summary: Plasmonic photocatalysis is a promising approach for solar energy transformation, which can enhance photocatalytic efficiency by optimizing the composition, spacing, and orientation of metal nanostructures. Integrating metal nanostructures with semiconductor photocatalysts can accelerate exciton generation and separation, thus improving photocatalytic efficiency.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Yu Zhang
Summary: The study developed a quantum-mechanical model and coupled master equation method to investigate the mechanisms of plasmonic hot-carrier generation, relaxation, and trapping. Numerical simulations on Jellium nanoparticles revealed that electron-electron scattering and electron-phonon scattering dominate different time scales in the relaxation dynamics. The theory applies to any other atomistic models beyond the demonstration with the Jellium model.
JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Sarthak Nag, Yoko Tomo, Koji Takahashi, Masamichi Kohno
Summary: This study investigates the merging process of surface nanobubbles using liquid-phase electron microscopy, revealing that the merging of stable nanobubbles is initiated by gradual localized changes in the physical properties of the region between adjoining nanobubble boundaries. The analysis of gas exchange mechanisms during the merging process enhances understanding of nanobubble behavior and dynamics, leading to potential new applications in various fields.
Article
Chemistry, Applied
Cancan Zhang, Yuying Zhang, Wei Xie
Summary: Hybrid plasmonic nanomaterials exhibit high catalytic activity in photocatalysis, with enhanced charge separation at hybrid interfaces. Recent research has focused on synthesizing these materials and their applications, particularly in H-2 production, CO2 reduction, and N-2 fixation.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Review
Optics
Huaping Jia, Chi Chung Tsoi, Abdel El Abed, Weixing Yu, Aoqun Jian, Shengbo Sang, Xuming Zhang
Summary: Plasmon-enhanced photocatalysis is a promising technology for solar-to-chemical energy conversion. By controlling the morphology, composition, size, spacing, and dispersion of nanostructures, plasmonic nanostructure arrays enhance light-harvesting capability, charge transfer, electromagnetic fields, and contact interfaces. This study provides an overview of plasmonic nanostructure arrays and their applications in solar-driven chemical conversion, offering guidance for integrating plasmonic nanostructures in functional devices in various fields.
LASER & PHOTONICS REVIEWS
(2023)
Review
Chemistry, Multidisciplinary
Cheon Woo Moon, Min-Ju Choi, Jerome Kartham Hyun, Ho Won Jang
Summary: The water-based renewable chemical energy cycle utilizes semi-infinite solar energy to produce hydrogen and oxygen. Efficient photoelectrodes with engineered nanostructures enhance light-matter interactions for effective photoelectrochemical water splitting. Plasmonic gold nanoparticles show promising potential for enhancing this process, but a complete understanding of their physical phenomena is still lacking.
NANOSCALE ADVANCES
(2021)
Article
Multidisciplinary Sciences
Arrigo Calzolari, Corey Oses, Cormac Toher, Marco Esters, Xiomara Campilongo, Sergei P. Stepanoff, Douglas E. Wolfe, Stefano Curtarolo
Summary: In this study, the authors investigated the optical properties of high-entropy transition-metal carbides and discovered that their optical response can be tuned by changing their composition and concentration. Experimental results showed that high-entropy carbides exhibit plasmonic properties even at high temperatures. These findings provide new insights for the development of multifunctional high-entropy ceramics.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Jiachen Zhang, Lei Zhang, Qun Zhang, Yi Luo
Summary: This study demonstrates a counterintuitive interplay between different modes in the plasmonic system of gold nanorods, where energy is transferred from the lower-energy longitudinal mode to the higher-energy transverse mode. The solvent environment plays a critical role in enabling this energy transfer. Control experiments using ultrafast spectroscopy provide verification and manipulation of this phenomenon, as well as addressing the subtle intermode dynamic screening effect in this unary plasmonic system.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Review
Acoustics
Tim Boers, Sicco J. J. Braak, Nicole E. T. Rikken, Michel Versluis, Srirang Manohar
Summary: Ultrasound, the primary imaging modality in thyroid nodule management, has limitations such as variability, limited field-of-view and functional imaging. However, current developments in ultrasound technologies, such as three-dimensional-Doppler, -elastography, -nodule characteristics-extraction, and machine-learning algorithms, are aimed at overcoming these limitations. The use of three-dimensional ultrasound in thyroid ablative treatments and biopsies is a promising area of research. This review provides an overview of the current and future applications of ultrasound in thyroid nodule management and discusses the potential of new developments and trends to improve diagnosis, therapy, and follow-up.
JOURNAL OF CLINICAL ULTRASOUND
(2023)
Article
Mechanics
Naoki Hori, Chong Shen Ng, Detlef Lohse, Roberto Verzicco
Summary: This study investigates the behavior of immiscible and incompressible liquid-liquid flows in a Taylor-Couette geometry using direct numerical simulations coupled with the volume-of-fluid method and a continuum surface force model. The interactions between the interface and the Taylor vortices are studied by varying the secondary-phase volume fraction and the system Weber number. The results reveal two different flow regimes depending on the Weber number, namely an advection-dominated regime and an interface-dominated regime.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Mechanics
Rui Yang, Christopher J. Howland, Hao-Ran Liu, Roberto Verzicco, Detlef Lohse
Summary: This study numerically investigates the melting process of a solid layer heated from below and finds that thermal convection leads to increased roughness of the interface, which is coupled to the flow topology. The structure of the interface coincides with the regions of rising hot plumes and descending cold plumes, and the roughness amplitude scales with the mean height of the liquid layer.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Mechanics
Mogeng Li, Detlef Lohse, Sander G. Huisman
Summary: We experimentally investigated the evaporation of highly volatile liquid droplets (Novec 7000 Engineered Fluid, HFE-7000) in a turbulent spray. The droplets were produced by a spray nozzle and injected into a purpose-built chamber filled with air containing varying amounts of water vapor. The results showed that water condensation occurred on the rapidly evaporating droplets, and a more humid environment led to faster evaporation and more water condensation. An analytical model based on Fick's law was used to quantitatively explain the data.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Chemistry, Physical
Dennis J. Klaassen, Carolien Castenmiller, Harold J. W. Zandvliet, Pantelis Bampoulis
Summary: The Ge(110) surface can reconstruct into ordered and disordered phases with a five-membered ring of Ge atoms as the basic unit. Different surface reconstructions result in a rich electronic density of states and several surface states. Through scanning tunneling microscopy and spectroscopy, we have identified the exact origins of these surface states and connected them to either the Ge pentagons or the underlying Ge-Ge bonds. We have shown that even small fluctuations in the positions of the Ge pentagonal units can cause significant variations in the local density of states. The precise modulation of the local density of states follows the geometrical constraints of tiling Ge pentagons. These geometry-correlated electronic states provide a vast configurational landscape that could have applications in data storage and computing.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Luuk J. Blaauw, Detlef Lohse, Sander G. Huisman
Summary: Using the Taylor-Couette geometry, we studied the impact of salt on drag reduction caused by bubbles in the flow. The drag reduction was found to decrease as the salt concentration increased, from 40% in fresh water to 15% in sea water. The presence of salts inhibited coalescence events, resulting in smaller bubbles and decreased drag reduction.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Physics, Multidisciplinary
Pantelis Bampoulis, Carolien Castenmiller, Dennis J. Klaassen, Jelle van Mil, Yichen Liu, Cheng-Cheng Liu, Yugui Yao, Motohiko Ezawa, Alexander N. Rudenko, Harold J. W. Zandvliet
Summary: We provide experimental evidence of a topological phase transition in germanene, a monoelemental quantum spin Hall insulator. By applying a critical perpendicular electric field, the topological gap is closed and germanene becomes a Dirac semimetal. Further increasing the electric field results in the opening of a trivial gap and the disappearance of metallic edge states. This switching of the topological state induced by an electric field, combined with the large gap, makes germanene suitable for room-temperature topological field-effect transistors, which could revolutionize low-energy electronics.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Applied
Maaike Rump, Uddalok Sen, Roger Jeurissen, Hans Reinten, Michel Versluis, Detlef Lohse, Christian Diddens, Tim Segers
Summary: In practical applications of inkjet printing, the intermittent idle periods of printhead nozzles lead to evaporation of ink from the nozzle exit. This evaporation results in concentration gradients within the multicomponent inks, which can directly and indirectly affect the jetting process, reproducibility, and print quality. This study investigates selective evaporation of water-glycerol mixtures from an inkjet nozzle through experiments, analytical modeling, and numerical simulations. The research sheds light on the complex physiochemical hydrodynamics associated with ink drying at printhead nozzles and contributes to the stability and reproducibility of inkjet printing.
PHYSICAL REVIEW APPLIED
(2023)
Article
Physics, Fluids & Plasmas
Yuki Wakata, Ning Zhu, Xiaoliang Chen, Sijia Lyu, Detlef Lohse, Xing Chao, Chao Sun
Summary: In this study, we investigate the Leidenfrost temperature for hot solid substrates with different thermal diffusivities and surface roughnesses. A phenomenological model is developed based on experimental data, which considers the thermal diffusivity of the solid substrate and establishes the relationship between surface roughness and vapor film thickness. The generality of this model is supported by experimental data for various liquids and solid substrates, providing a theoretical prediction of the Leidenfrost temperature and a comprehensive understanding of the Leidenfrost effect.
PHYSICAL REVIEW FLUIDS
(2023)
Article
Mechanics
You-An Lee, Detlef Lohse, Sander G. Huisman
Summary: We experimentally investigate the early-stage scalar mixing and transport with solvent exchange in a quasi-2D jet. Different modes of fluid supply, continuous injection and finite volume injection, are studied to analyze the starting jet and puff behaviors. The results show that the lack of continuous fluid supply in the puff leads to different characteristics in transport, entrainment, mixing, and nucleation.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2023)
Article
Mechanics
Nikolas O. Aksamit, Robert Hartmann, Detlef Lohse, George Haller
Summary: Mathematical developments in the theory of objective coherent structures have improved our understanding of the material organization of complex fluid flows. However, there is limited investigation into these objectively defined transport barriers in 3-D unsteady flows with complicated spatiotemporal dynamics. Our study utilizes simulations to uncover the interplay between different types of barriers in turbulent rotating Rayleigh-Bénard convection.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Mechanics
Jochem G. Meijer, Yanshen Li, Christian Diddens, Detlef Lohse
Summary: When an immiscible oil drop is immersed in a stably stratified ethanol-water mixture, it undergoes a transition from levitating to bouncing due to the oscillatory instability of the Marangoni flow on the drop's surface. The bouncing characteristics of the drop, such as jumping height and rising and sinking time, are studied in relation to the control parameters of drop radius, stratification strength, and drop viscosity. Experimental observations are backed by a simplified dynamical analysis and numerical simulations to verify the drag coefficients.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Instruments & Instrumentation
K. Vonk, J. D. Verbakel, R. Huijink, H. J. W. Zandvliet
Summary: This work demonstrates a method for electrical transport measurements on small graphene flakes using a collinear micro-four-point probe, eliminating the need for fabricating electrodes on top of the flakes. Measurements on graphene on silicon oxide and hexagonal boron nitride show good agreement with conventional transport measurements in terms of charge carrier mobilities and minimum conductivity. The possible damage caused by landing these probes on graphene is also assessed.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Mechanics
Qi Wang, David Goluskin, Detlef Lohse
Summary: Two-dimensional horizontally periodic Rayleigh-Benard convection between stress-free boundaries can exhibit two distinct types of states: roll states and windy states. Roll states consist of pairs of counter-rotating convection rolls, while windy states are dominated by a strong horizontally sheared wind that suppresses convection rolls. Windy states only occur when the Rayleigh number is sufficiently above the onset of convection.
JOURNAL OF FLUID MECHANICS
(2023)