Article
Optics
Shunta Fukushima, Hirofumi Hidai, Souta Matsusaka, Akira Chiba, Noboru Morita
Summary: Implanting metals into glass using continuous laser heating and transferring copper particles from a foil can form plasma to enable material migration, but it is crucial to control the plasma propagation speed to prevent fiber fuse. Emission spectroscopy and numerical calculations were used to study the required heating conditions for implanting copper spheres in borosilicate glass, revealing a temperature of 5100 K during implantation. Plasma propagation speed was found to increase with laser power density, with successful copper sphere implantation occurring at speeds of 20-50 mm/s.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Shukoh Yoshimura, Hirofumi Hidai, Souta Matsusaka, Akira Chiba, Tetsuo Kishi, Noboru Morita
Summary: This paper explores the manipulation of metal spheres in glass to control the optical properties, specifically in the formation of optical waveguide materials. The authors demonstrate the migration of nickel spheres in glass ceramics, dedoping phosphorus and tin while incorporating nickel. The mechanisms of dedoping and incorporation are presented.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Optics
Yichi Han, Xiaocong Peng, Songlin Wan, Chaoyang Wei, Jianda Shao
Summary: In this article, a three-dimensional multi-physics thermomechanical model was developed to reveal the evolution mechanism of surface morphology and thermal stress formation during laser ablation. The simulated results were validated through experiments. This study contributes to a profound understanding of the laser ablation process and establishes a theoretical foundation for achieving high surface quality and non-thermal stress laser ablation.
Article
Optics
Yichi Han, Xiaocong Peng, Song lin Wan, Chaoyang Wei, Jianda Shao
Summary: This article develops a three-dimensional multi-physics thermo-mechanical model to reveal the evolution mechanism of laser ablation and validates the simulated results through experiments. The study quantifies thermal stress and reveals stress distribution and evolution behaviors under different processing parameters.
Article
Nanoscience & Nanotechnology
Shunta Fukushima, Hirofumi Hidai, Sho Itoh, Souta Matsusaka
Summary: This study demonstrates the local control of absorption properties in borosilicate glass through the migration of gold spheres, resulting in the precipitation of gold nanoparticles. The absorption properties of the trajectory depend on the velocity of the gold sphere migration, allowing for precise control over the glass's absorption properties.
Article
Mechanics
Vaseem A. Shaik, Arezoo M. Ardekani
Summary: This study investigates the axisymmetric motion of a spherical squirmer in a linearly density-stratified fluid. It found that the stratification affects the speed of the swimmer and the mixing of the surrounding fluid. The results provide insights into the effects of stratification on the motility of the organism and the induced mixing.
Article
Engineering, Environmental
Ravi Prakash, Sumana Ghosh
Summary: The present study focuses on the analysis of film formation in liquid-liquid two-phase flow in a mini capillary tube with different wettability. Experimental observations and analytical predictions show good agreement, indicating the effectiveness of the analyzed model.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Physics, Applied
Feng Shen, Mingzhu Ai, Zonghe Li, Sen Xue, Min Xu, Zhaomiao Liu
Summary: In this Letter, the motion of a neutrally buoyant particle in a microvortex at a Reynolds number of 303 was quantitatively measured. The particle dynamics were characterized along the orbit, revealing the phases of acceleration, swerving, and following. The results provide insights into particle dynamics and particle-fluid interactions.
APPLIED PHYSICS LETTERS
(2022)
Article
Engineering, Chemical
Shaowei Wang, Huanpeng Liu
Summary: The study found that the Reynolds number and fractal dimension of agglomerates significantly affect the flow field, and drag ratios obtained from numerical simulation agree well with experimental data. The effect of radial variation of permeability on drag force seems almost negligible in the range of moderate Reynolds numbers.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Multidisciplinary
Arata Sawafuji, Hirofumi Hidai, Souta Matsusaka, Akira Chiba, Noboru Morita
Summary: The authors manipulated a metal sphere in glass using near-infrared laser, causing the metal sphere migration driven by surface heating. The results confirmed that glass surface heating caused temperature distribution and metal sphere migration.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2022)
Article
Engineering, Chemical
Haotian Cha, Hoseyn A. Amiri, Sima Moshafi, Ali Karimi, Ali Nikkhah, Xiangxun Chen, Hang T. Ta, Nam-Trung Nguyen, Jun Zhang
Summary: Inertial microfluidics is a technique that uses the finite inertia of fluid at high flow speed to manipulate and separate microparticles. Embedding periodic micro-obstacles into curvilinear channels has been found to be an effective strategy to improve inertial focusing and separation. This study systematically investigated the influence of micro-obstacles on inertial focusing and developed a high-resolution microfluidic device for particle and cell separation. The results showed that concave obstacles were more effective in tuning particle inertial focusing and separation compared to convex obstacles, and the square concave obstacle channel offered the highest separation resolution. The developed microfluidic device showed high-efficiency separation of polystyrene beads and U87MG cancer cells from blood.
CHEMICAL ENGINEERING SCIENCE
(2023)
Review
Physics, Multidisciplinary
H. Dehgan, M. H. Nobakhti, E. Esmaeilzadeh, M. Khayat, A. Rostamzadeh Khosroshahi
Summary: This study experimentally investigated the free-fall behavior of rotating and non-rotating spherical particles in a viscous fluid, exploring the effects of physical parameters on terminal velocity. The results showed that an increase in particle diameter, density, and rotational velocity, along with a decrease in fluid viscosity, accelerated the terminal velocity. Additionally, changes in rotational velocity and Reynolds number influenced the lift coefficient.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Mechanics
Hao-peng Sun, Jiao Sun, Zi-yun Su, Run-ze Cai, Kang-fu Sun, Wen-yi Chen, Chang-xin Yu
Summary: This study experimentally investigates the lateral motion of a single bubble contaminated by surfactant in a linear shear flow. The results show that the presence of surfactant inhibits the lateral migration of bubbles, and increasing the surfactant concentration and bubble size strengthens this inhibition effect.
Article
Physics, Applied
Zhixiong Gong, Michael Baudoin
Summary: Holographic acoustical tweezers based on SIDTs are versatile tools for selective manipulation of microparticles and cells in a standard microfluidic environment. The study demonstrates the potential for creating a 3D radiation trap for microparticles and cells using spiraling tweezers with sufficiently large apertures.
PHYSICAL REVIEW APPLIED
(2021)
Article
Energy & Fuels
Xin Chen, Yiqiang Li, Zheyu Liu, Jian Zhang, Japan Trivedi, Xianjie Li
Summary: This paper focuses on the migration process and flow resistance prediction of elastic particles in porous media, establishing a migration and plugging model based on the Hertzian contact theory. Experimental results demonstrate that elastic particles form a filter cake within 3 cm of the injection end of the core, with a three-stage Gathered and Energized transport mode. The model can predict injection pressure with high consistency and provides a new method for studying elastic particle migration in porous media.
Article
Chemistry, Physical
Ryosuke Nitta, Hwai-En Lin, Yuta Kubota, Tetsuo Kishi, Tetsuji Yano, Nobuhiro Matsushita
Summary: CuO nanosheets were fabricated on flexible substrates using a spin-spray method with different complexing agents, showing great potential as humidity sensors. Among them, grass-like CuO nanosheets exhibited excellent humidity-sensing performance with high sensitivity and short response and recovery times.
APPLIED SURFACE SCIENCE
(2022)
Article
Optics
Shunta Fukushima, Hirofumi Hidai, Souta Matsusaka, Akira Chiba, Noboru Morita
Summary: Implanting metals into glass using continuous laser heating and transferring copper particles from a foil can form plasma to enable material migration, but it is crucial to control the plasma propagation speed to prevent fiber fuse. Emission spectroscopy and numerical calculations were used to study the required heating conditions for implanting copper spheres in borosilicate glass, revealing a temperature of 5100 K during implantation. Plasma propagation speed was found to increase with laser power density, with successful copper sphere implantation occurring at speeds of 20-50 mm/s.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
Arata Sawafuji, Hirofumi Hidai, Souta Matsusaka, Akira Chiba, Noboru Morita
Summary: The authors manipulated a metal sphere in glass using near-infrared laser, causing the metal sphere migration driven by surface heating. The results confirmed that glass surface heating caused temperature distribution and metal sphere migration.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Shukoh Yoshimura, Hirofumi Kawamura, Hirofumi Hidai, Souta Matsusaka, Akira Chiba, Tetsuo Kishi, Noboru Morita
Summary: This study reports the laser manipulation of metal spheres in glass, demonstrating the formation of stainless steel-silver core-shell spheres. The technique uses laser-induced migration in silver-doped glass to form core-shell-structured metal spheres and eliminate the silver contained in the glass along the migration trajectory of the spheres.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Ceramics
Shukoh Yoshimura, Hirofumi Hidai, Souta Matsusaka, Akira Chiba, Tetsuo Kishi, Noboru Morita
Summary: This paper explores the manipulation of metal spheres in glass to control the optical properties, specifically in the formation of optical waveguide materials. The authors demonstrate the migration of nickel spheres in glass ceramics, dedoping phosphorus and tin while incorporating nickel. The mechanisms of dedoping and incorporation are presented.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Engineering, Multidisciplinary
Hirofumi Kawamura, Riku Okuda, Souta Matsusaka, Kentaro Nomoto, Hiroki Kodaka, Hirofumi Hidai, Akira Chiba, Noboru Morita
Summary: Solid-state ion exchange is a metal doping method used for alkali-containing glass materials. In this study, the effect of etching conditions on the dissolution characteristics of precipitated and un-precipitated areas was evaluated. The results showed that the potassium hydroxide (KOH) solution was suitable for preferentially removing the silver precipitated area.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Shunta Fukushima, Hirofumi Hidai, Sho Itoh, Souta Matsusaka
Summary: This study demonstrates the local control of absorption properties in borosilicate glass through the migration of gold spheres, resulting in the precipitation of gold nanoparticles. The absorption properties of the trajectory depend on the velocity of the gold sphere migration, allowing for precise control over the glass's absorption properties.
Article
Multidisciplinary Sciences
Daijiro Tokunaga, Masataka Sato, Sho Itoh, Hirofumi Hidai, Takashige Omatsu, Souta Matsusaka
Summary: Internal and local modifications to diamond using ultrashort pulsed laser illumination are effective for manufacturing diamond electronic devices. The diameter and electrical conductivity of modified regions are dependent on the laser fluence distribution. Different types of modified regions with varying diameters and electrical conductivities can be fabricated by controlling the laser focus movement distance per pulse (V-f).
SCIENTIFIC REPORTS
(2022)
Article
Physics, Applied
Ryosuke Nitta, Yuta Kubota, Ayaka Endo, Hwai-En Lin, Tetsuo Kishi, Suguru Kitani, Hitoshi Kawaji, Nobuhiro Matsushita
Summary: The research shows that a transparent zinc oxide film can be deposited at a low temperature using the spin-spray method, and ultraviolet light irradiation can significantly improve the film's resistivity. The specific mechanism involves the decomposition of water molecules in the lattice by UV light, resulting in the generation of a series of hydrogen donors, providing new theoretical support for the photocatalytic properties of zinc oxide films.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Gozden Torun, Tetsuo Kishi, Diego Pugliese, Daniel Milanese, Yves Bellouard
Summary: This article discusses the formation of elemental trigonal tellurium (t-Te) on tellurite glass surfaces exposed to femtosecond laser pulses. The underlying elemental crystallization phenomenon is investigated by altering laser parameters in common tellurite glass compositions under various ambient conditions. The research reveals the complex phase transformation and potential to fabricate functional transparent electronic micro/nanodevices.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Kosuke Sakamoto, Daijiro Tokunaga, Sho Itoh, Hirofumi Hidai, Souta Matsusaka, Takashige Omatsu, Koji Koyama, Seong-Woo Kim, Noboru Morita
Summary: This paper introduces a technique of slicing materials using a laser along cracks, and proposes a new slicing technique for fabricating diamond wafers on the {100} surface. To restrict unwanted cracks, a laser irradiation sequence and cutting method were devised. This slicing technology may facilitate the realization of diamond semiconductors based on diamond wafers with {100} surfaces.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Kaito Miyakoda, Koki Sunayama, Kosuke Sakamoto, Daijiro Tokunaga, Hirofumi Hidai, Souta Matsusaka
Summary: A fiber fuse is a heat spot that propagates toward a light source with bright emission. It occurs due to heating and contamination on the edge of the fiber. Manipulation of the heat spot by laser scanning was demonstrated in this study, showing curved modification. The emissions did not follow the scan and disappeared at high scanning speeds, but the conditions under which the emission followed the scan were experimentally determined by changing the scanning speed. Curved hole formation was also demonstrated by manipulating the heat spot and ejecting the heated glass.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2023)
Proceedings Paper
Optics
Shunta Fukushima, Hirofumi Hidai, Souta Matsusaka
Summary: Metal doping in glass can change its properties. Laser heating can implant metal spheres into glass, and the speed of implantation is directly related to the laser power density.
OPTICAL MANIPULATION AND STRUCTURED MATERIALS CONFERENCE (OMC 2022)
(2022)
