Article
Materials Science, Multidisciplinary
Vita Petrikaite, Martynas Skapas, Evaldas Stankevicius
Summary: Hybrid gold-silver nanoparticles with high stability can be generated by laser ablation of thin-film composites in water, without the use of surfactants.
Article
Materials Science, Multidisciplinary
Norita Mohd Yusoff, Mahmoud Hazzaa Mohamed Ahmed, Eng Khoon Ng, Mohammed Thamer Alresheedi, Mohd Zul Hilmi Mayzan, Mohd Adzir Mahdi
Summary: This work presents a tapered fiber decorated with bulk alpha-alumina that induces noise-like pulse (NLP) in an eye-safe wavelength region. The NLP is formed through light-matter interaction within an ultrathin tapered fiber in a ring configuration of a thulium-doped fiber laser.
RESULTS IN PHYSICS
(2023)
Article
Optics
Yue Lu, Ziren Zhu, Jinzhou Bai, Xinjun Su, Rongqing Tan, Jinghan Ye, Yijun Zheng
Summary: The spectral linewidth of a transversely excited pulsed CO2 laser is broadened at high working pressures. In this study, a continuously tunable pulsed CO2 laser with a low nitrogen proportion in the mixture is developed to generate tail-free short pulses.
CHINESE OPTICS LETTERS
(2022)
Article
Physics, Multidisciplinary
C. J. Moll, J. Versluis, H. J. Bakker
Summary: By studying the bending mode, we can obtain structural and quantitative information about both the surface and the bulk of water.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Applied
X. F. Shen, A. Pukhov, M. M. Guenther, O. N. Rosmej
Summary: Through 3D PIC simulations, it is demonstrated that the laser-accelerated electron beam can serve as a compact high-brightness source of X rays. Relativistic electrons undergo betatron oscillations in the ion channel, emitting bright broadband X-ray radiation with a critical energy of about 5keV. The simulation results indicate that with a picosecond, 20J laser pulse, a significant number of photons can be generated, resulting in an X-ray spectrum with high brilliance.
APPLIED PHYSICS LETTERS
(2021)
Article
Environmental Sciences
Edward Gryspeerdt, Franziska Glassmeier, Graham Feingold, Fabian Hoffmann, Rebecca J. Murray-Watson
Summary: This study examines the impact of droplet number concentration (N-d) on liquid water path (LWP) variations by using satellite observations of cloud development. The results show that while an increase in N-d leads to a decrease in LWP, various local environmental factors also affect N-d, complicating the causal relationship between N-d and LWP. Therefore, more frequent observations of key cloud properties are needed to better understand cloud behavior at process timescales.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Thermodynamics
Alexander A. Igolnikov, Sergey B. Rutin, Pavel Skripov
Summary: The study demonstrates the possibility of performing short-term measurements on the unstable states of partially-soluble binary liquids using controlled pulse heating method. Significant superheating of the solution with respect to the spinodal was observed, along with a change in heat transfer mode in the solution that is time-limited and reproducible with respect to temperature.
THERMOCHIMICA ACTA
(2021)
Article
Physics, Applied
M-A H. Zosa, Y. J. Gu, M. Murakami
Summary: This passage describes a method of generating magnetic fields using a paisley pattern target and the effects of laser irradiation and target parameters on the magnetic field intensity. The lifetime of the magnetic field can be extended by using a double paisley configuration, and the design can be simplified.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Maria S. Grigoryeva, Irina A. Kutlubulatova, Stanislav Yu. Lukashenko, Anastasia A. Fronya, Dmitry S. Ivanov, Andrey P. Kanavin, Victor Yu. Timoshenko, Irina N. Zavestovskaya
Summary: Understanding the mechanism of short laser pulse interactions with semiconductor materials is crucial for advancing high-tech technologies. In this study, the atomistic-continuum approach was used to model the interactions of fs-laser pulses with crystalline silicon and porous silicon. The results provide insights into the microscopic mechanism of laser-induced phase transitions and melting.
Article
Optics
N. Dogru, H. S. Duranoglu Tunc, A. M. AL-Dabbagh
Summary: This study investigates the output pulses of an InAs-InP quantum dot laser by using theoretical models, showing that shorter pulses can be obtained by applying an external optical beam.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Shang Gao, Chrystian Ochoa, Vivek Sharma, Samanvaya Srivastava
Summary: The addition of salt significantly alters the stratification drainage process in micellar foam films formulated with ionic surfactants, leading to smaller step sizes and fewer steps in the thinning of the films. The long-range correlations between micelles are weakened, resulting in a rich nanoscopic topography and smaller intermicellar distances.
Article
Engineering, Environmental
Lei Zhao, Hui Chen, Zhiguo Yuan, Jianhua Guo
Summary: The study found that a high supply rate of electron acceptors is favorable for methane conversion to short-chain fatty acids, while a low supply rate leads to decreased production. Microbial community analysis indicated that Methanosarcina, Methanobacterium, Propionispora, and Clostridium play key roles in methane bioconversion to SCFAs.
Review
Optics
Shijie Song, Qinghua Lu, Peilei Zhang, Hua Yan, Haichuan Shi, Zhishui Yu, Tianzhu Sun, Zhirong Luo, Yingtao Tian
Summary: This paper reviews the important theories of ultra-short pulse laser ablation, including electromagnetic theory and matter reorganization theory, and summarizes the complex physical processes and the most popular two-temperature model in ultra-short pulse laser ablation. It discusses the use of the two-temperature model to enhance single-pulse laser ablation analysis and promote the understanding of the micro-nano structures generated by ultra-short pulse laser ablation. Various complex two-temperature model methods for simulating the interaction between ultra-short pulse lasers and metals are introduced. The main difficulties faced by ultra-short pulse laser processing are listed and suggestions for future simulations of ultra-short pulse laser processing are put forward.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Instruments & Instrumentation
C. W. Domier, Y. Zhu, J. Dannenberg, N. C. Luhmann
Summary: Ultrashort Pulse Reflectometry (USPR) is a plasma diagnostic technique that involves the propagation and reflection of ultrashort chirps. The new generation USPR system has significantly improved performance with advanced technology to reduce measurement time and enhance data acquisition and analysis efficiency.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Physics, Fluids & Plasmas
L. G. Huang, M. Molodtsova, A. Ferrari, A. Laso Garcia, T. Toncian, T. E. Cowan
Summary: In this study, the dynamics of hot refluxing electrons in the interaction of an ultra-short relativistic laser pulse with a thin foil target are investigated via particle-in-cell (PIC) simulations. The results show that the refluxing efficiency is higher than 95% and the refluxing electrons exhibit specific transverse spatial and energy-resolved angular distributions.
PHYSICS OF PLASMAS
(2022)
Article
Materials Science, Multidisciplinary
Miao He, Eaman T. Karim, Maxim Shugaev, Leonid Zhigilei
Summary: Molecular dynamics simulations were used to investigate the generation of vacancies at a crystal-liquid interface under conditions of undercooling for bcc Cr and fcc Ni metals. The results show that the vacancy concentrations produced can exceed equilibrium values by orders of magnitude. Different trends in vacancy concentration with temperature for Ni and Cr are related to the temperature dependences of the crystallization front velocity predicted for the two metals.
Article
Chemistry, Physical
Cheng-Yu Shih, Chaobo Chen, Christoph Rehbock, Anna Tymoczko, Ulf Wiedwald, Marius Kamp, Ulrich Schuermann, Lorenz Kienle, Stephan Barcikowski, Leonid Zhigilei
Summary: Pulsed laser ablation in liquids (PLAL) is a promising technique for generating colloidal alloy nanoparticles needed in various fields. The study combines computational and experimental methods to investigate the limited mixing of components and formation of different composition nanoparticles in the PLAL process from bilayer films.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Miao He, Kaushik Joshi, Leonid V. Zhigilei
Summary: The presence of a high-quality skin layer is found to increase both the Young's modulus and tensile strength of carbon nanofibers, contrary to the established notion of the deleterious effect of the skin layer. The ability of the skin layer to suppress crack nucleation at the core-skin interface is related to the strengthening of the nanofibers. Computational predictions suggest that new approaches to carbon fiber manufacturing and processing, leading to the generation of a high-quality skin layer while avoiding the introduction of structural defects at the core-skin interface, may significantly enhance the mechanical properties of carbon fibers.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Hao Huang, Leonid Zhigilei
Summary: Short-pulse laser irradiation of a colloidal solution of nanoparticles is an effective method for fragmenting the nanoparticles and producing smaller nanoparticles and atomic clusters with desired properties. A computational model capable of realistic treatment of various processes reveals two distinct channels of formation of the fragmentation products. The nanoparticles experience ultrafast quenching in the water environment, leading to high density of twin boundaries and crystal defects that enhance catalytic applications.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Multidisciplinary Sciences
Eaman T. Karim, Miao He, Ahmed Salhoumi, Leonid V. Zhigilei, Peter K. Galenko
Summary: The results from molecular dynamics (MD) simulations demonstrate a complex temperature dependence of the crystal-liquid interface velocity during crystallization, with an initial increase at moderate undercooling followed by a gradual decrease at deeper levels of undercooling. Existing theoretical models fail to fully describe the MD results, but using the hodograph equation can provide a better prediction across the entire temperature range.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2021)
Article
Physics, Applied
Maxim Shugaev, Leonid Zhigilei
Summary: This study demonstrates that under nonablative thermoelastic irradiation regime, laser pulses with appropriate spot size and energy deposition depth can generate high-intensity surface acoustic waves (SAWs) in Si, with strain amplitudes reaching levels of 10^-4 to 10^-3. These strong SAWs have the potential to drive nonlinear profile sharpening and shock front formation during their propagation, presenting the feasibility of continuous generation of strong nonlinear pulses of SAWs for various applications.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Maxim Shugaev, Leonid Zhigilei
Summary: The phenomenon of acoustic desorption is studied in atomistic simulations, showing a nonthermal nature with a sharp threshold-like dependence on binding energy and mass. Nonlinear sharpening of acoustic waves during propagation plays a key role in creating conditions for desorption/exfoliation. The study has practical implications for laser-induced experiments and new approaches in thin film growth and catalytic activity regeneration.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Editorial Material
Physics, Multidisciplinary
A. Ziefuss, S. Barcikowski, L. Zhigilei
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2022)
Article
Physics, Multidisciplinary
Hao Huang, Leonid Zhigilei
Summary: In this study, the effect of energy density on the fragmentation mechanisms in laser fragmentation in liquid was investigated. It was found that the decrease in absorbed laser energy led to the transition from strong phase explosion to nanoparticle fragmentation, resulting in the formation of a core-satellite structure. In the regime of mild phase explosion, some of the hot metal droplets generated by explosive decomposition were reflected back to form a central nanoparticle. At lower energy densities, intense evaporation from the nanoparticle surface and condensation of metal vapor led to the formation of a core-satellite structure.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2022)
Editorial Material
Optics
Chaobo Chen, Leonid V. Zhigilei
Summary: Ultrafast pump-probe microscopy has provided new insights into the complex dynamics of laser-induced explosive phase transformations and highlighted the importance of close integration of experimental, computational, and theoretical efforts.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Chemistry, Physical
Miao He, Mikhail I. Arefev, Kaushik Joshi, Leonid Zhigilei
Summary: The mechanisms of tensile deformation and fracture of carbon fibers were investigated through large-scale molecular dynamics simulations. The simulations revealed that the nanostructure of carbon fibers consists of a mixture of stiff and soft regions, allowing for continuous nanoscale load redistribution and enhancing the strength and fracture strain of the fibers.
Article
Multidisciplinary Sciences
Mikhail I. Arefev, Maxim V. Shugaev, Leonid V. Zhigilei
Summary: Melting phenomenon, although well studied, still reveals new findings when triggered by laser excitation, as shown by experiments of nanosecond-scale melting. Atomistic simulations demonstrate that a combined effect of lattice superheating and relaxation of laser-induced stresses ensures the dominance of homogeneous melting mechanism. However, the much longer melting times and the contribution of heterogeneous melting observed in experiments cannot be explained by adjusting the electron-phonon coupling strength.
Article
Materials Science, Multidisciplinary
Chaobo Chen, Leonid V. Zhigilei
Summary: The mechanisms of picosecond pulse laser ablation in liquid were investigated through large-scale atomistic simulations on FeNi targets. Three fluence regimes were identified, each with different dominant mechanisms of material ejection and nanoparticle formation. The simulations provide a comprehensive understanding of the ablation dynamics and can aid in the interpretation of experimental results. Rating: 8/10
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)