Article
Engineering, Industrial
Young-Jin Kim, Dongwook Yang, Han Ku Nam, Truong-Son Dinh Le, Younggeun Lee, Soongeun Kwon
Summary: This research converts Kevlar textiles into laser-induced graphene using ultrafast laser pulses, achieving high-speed strain sensors. These sensors have fast response time and high sensitivity, enabling real-time monitoring of human heartbeats, articular motions, and composite dynamics.
CIRP ANNALS-MANUFACTURING TECHNOLOGY
(2022)
Article
Engineering, Manufacturing
T. Muthuramalingam, Ravi Akash, Shravan Krishnan, Nguyen Huu Phan, Vu Ngoc Pi, Ammar H. Elsheikh
Summary: Laser power plays a significant role in determining surface quality measures, and optimizing process parameters can reduce plasma energy and improve machining accuracy.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Materials Science, Multidisciplinary
Ghazi Alsoruji, T. Muthuramalingam, Essam B. Moustafa, Ammar Elsheikh
Summary: This study proposes a decision-making process based on multiple criteria for laser beam drilling process to enhance the machining process measures of Nickel Inconel 718 alloy. By utilizing Taguchi-Grey Relation Analysis (TGRA), optimal process factors were obtained to improve the material removal rate and surface finish. The results show that gas pressure plays a dominant role in the performance measures of Laser Beam Machining (LBM) due to its concentrated energy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Coatings & Films
Lewin Rathmann, Lucas-Hermann Beste, Tim Radel
Summary: Friction during forming processes can be reduced by using mineral oil-based lubricants, but there is interest in exploring alternative lubricants for ecological and economic reasons. By functionalizing tool surfaces with laser-induced periodic surface structures (LIPSS) to create hydrophilic surfaces, water can potentially be used as a lubricant. To protect LIPSS from direct tribological contact, dimples are created on the contact surface of tools, smoothed by laser polishing, and subsequently hardened by laser hardening. This combination of processes allows for both surface hardening and retention of hydrophilic properties, while preventing direct contact with LIPSS.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Engineering, Biomedical
Slila Chayanun, Theerapat Chanamuangkon, Budsaraporn Boonsuth, Aldo R. Boccaccini, Boonrat Lohwongwatana
Summary: Polyetheretherketone (PEEK) has become an alternative to conventional metal implants due to its superior mechanical properties and chemical stability. However, its bio-inertness limits its applications. This study combines CO2 laser machining with sulfonation to enhance the bioactivity of PEEK and strengthen the implant-bone interface. The combination treatment shows the highest mineralization and ALP activity, providing a promising pathway for future PEEK-based orthopedic applications.
MATERIALS TODAY BIO
(2023)
Article
Optics
S. Santosh, J. Kevin Thomas, M. Pavithran, G. Nithyanandh, J. Ashwath
Summary: Shape memory alloys are metallic materials that can return to a previous shape when exposed to appropriate conditions. Laser beam machining is a successful technology for processing these alloys. The study reveals that power and cutting speed are the most influential factors affecting material removal rate and surface roughness.
OPTICS AND LASER TECHNOLOGY
(2022)
Review
Materials Science, Multidisciplinary
Alokesh Pramanik, Animesh Kumar Basak
Summary: This study investigates the mechanism of laser beam machining on titanium alloy, including surface formation, heat-affected zone, taper formation, and dimensional deviation. The study also explores the possibility of improving surface finish quality and properties of titanium components by using laser beam machining. Several hybrid machining processes were proposed to enhance the machining efficacy of titanium alloys.
Article
Engineering, Industrial
Jinshi Wang, Fengzhou Fang
Summary: A novel method is proposed to reduce the electronic band gap by ion implantation, achieving successful fabrication of micro/nano-structures on brittle materials. The proposed approach lowers the ablation threshold and enables selective material removal, resulting in a surface roughness one-sixth of that achieved by traditional laser machining.
CIRP ANNALS-MANUFACTURING TECHNOLOGY
(2023)
Article
Thermodynamics
Jingtan Chen, Kejian Dong, Sihong He, Wei Deng, Jiyun Zhao
Summary: Microgroove surfaces provide a passive and sustainable approach for enhancing condensation heat transfer. A 3D Lattice Boltzmann Method model is developed to investigate the enhancement mechanisms and determine the optimum microgroove geometry design. The study reveals that suction and bridging modes are the major droplet behaviors on microgroove surfaces.
APPLIED THERMAL ENGINEERING
(2023)
Article
Engineering, Environmental
Juling Li, Juanhua Tian, Yingtao Gao, Rongrong Qin, Hemu Pi, Mengjie Li, Peng Yang
Summary: This study developed a bio-safe superhydrophobic coating to repel water adsorption, food and blood adherence, with strong interfacial stability and good repellence to various liquids. By using natural materials and micro-/nano-topography, the coating effectively resists the adhesion of liquid foods and biofluids, enhancing the water repellence of packaging materials. The amyloid-like protein assembly plays a crucial role in preparing the all-natural green interfacial coating for robust repellence of water, edible liquids and blood.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Optics
Yongzhi Yang, Yuanxue Ma, Wanqing Li, Long Ma, Zheng Li, Bochao Jia, Zezhou Xu, Zhenglei Yu, Ping Liang
Summary: This paper investigates the improvement of corrosion resistance of LPBF-NiTi alloy by constructing micro-nano papillary structures using nanosecond laser machining combined with a grid-like scanning strategy. Superhydrophobic surface was obtained after low-temperature heat treatment, leading to enhanced corrosion resistance of the alloy.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Manufacturing
Wuji Huang, Avik Samanta, Yong Chen, Stephen Baek, Scott K. Shaw, Hongtao Ding
Summary: A general machine learning framework for surface wetting, considering factors such as solid surface topography, chemistry, liquid properties, and environmental conditions, is proposed. An XGBoost-based model is demonstrated for studying surface wetting behaviors processed by laser-based surface functionalization. The importance of surface chemistry in determining wettability is highlighted, while surface morphology also plays a role in influencing wetting behavior.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Materials Science, Ceramics
M. Morales, S. Garcia-Gonzalez, J. Rieux, E. Jimenez-Pique
Summary: An effective strategy to reduce cathode polarization in a SOFC is to enlarge the cathode-electrolyte interface by corrugating the surface of the electrolyte, and this study analyzes the microstructural and phase changes as well as collateral damage caused by laser machining of the 8YSZ electrolyte surface. The results show the presence of a limited heat affected zone with microcracking and directional recrystallization, larger in 8YSZ than in 3Y-TZP, but no significant changes in the mechanical response and chemical composition of the machined surface.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Engineering, Electrical & Electronic
Mathieu Francois, Sangil Han, Frederic Segonds, Corinne Dupuy, Mickael Rivette, Simon Turpault, Mehdi Mimouna, Ferdinando Salvatore, Joel Rech, Patrice Peyre
Summary: Abrasive flow machining (AFM) was used to reduce the surface roughness of four different waveguides, resulting in a significant reduction in transmission loss at both K and Q bands.
JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS
(2021)
Article
Optics
Yanjun Guo, Xiaojing Yang, Jie Kang, Maozhong Li, Qiming Xie, Jianguo Xiao, Wanqing Zhang
Summary: This study experimentally investigated the effect of spindle speed, feed speed, cutting depth, and laser pulse duty cycle on the surface roughness during laser-assisted machining of single crystal Si. The results showed a significant improvement in machinability, with spindle speed, feed speed, cutting depth, and pulse duty cycle contributing differently to surface roughness. Interaction between factors also played a significant role in influencing surface roughness.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
A. G. Abd-Elrahim, Doo-Man Chun
Summary: ZnO-graphene nanocomposites deposited on a nickel foam substrate through a kinetic spray process exhibited enhanced photocatalytic activity for methylene blue degradation. The incorporation of graphene species resulted in a decreased optical bandgap and improved visible light harvesting, leading to higher degradation efficiency and reaction kinetics rate constant in comparison with other nanostructured photocatalysts.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
A. G. Abd-Elrahim, Doo-Man Chun
Summary: Nano-sized Co3O4-MoS2/Ni foam heterostructure electrodes were fabricated using a vacuum kinetic spray technique with microparticles of Co3O4 and MoS2. The addition of MoS2 enhanced the OER activity, with the electrode containing 75 wt.% MoS2 showing the highest activity and stability. Characterization techniques like SEM, Raman spectroscopy, and XPS revealed improvements in the surface states of the obtained heterostructure electrodes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
A. G. Abd-Elrahim, Doo-Man Chun
Summary: Ternary Co3O4-Ni(OH)(2)-graphene hybrid nanocomposites are synthesized using a facile kinetic spray process, resulting in enhanced oxygen evolution reaction performance. The optimized heterostructure exhibits nanosheet and nanoflake morphologies, with improvements in disorder-related modes and downshift of binding energies. The best synthesized material demonstrates excellent OER performance and long-term stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Industrial
Ngoc Giang Tran, Doo-Man Chun
Summary: In this study, extreme wettability contrast aluminum surfaces were fabricated using a green manufacturing process, without the use of toxic chemicals. The nano-microscale hierarchical structures on the aluminum surfaces allowed for stable superhydrophilic/superhydrophobic properties, with additional formation of hydrophilic pseudo-boehmite structure after boiling water treatment. The mechanism of wettability transition was analyzed by surface morphology and chemistry, demonstrating precision water droplet arrays and aqueous liquid control on the superhydrophobic surfaces.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Polymer Science
Van-Ta Do, Doo-Man Chun
Summary: This study proposes a simple and cost-effective method for fabricating superhydrophobic films with excellent performance and stability, which can be applied in various industrial fields.
Article
Materials Science, Multidisciplinary
A. G. Abd-Elrahim, Doo-Man Chun
Summary: A new approach for mechanical exfoliation and deposition of graphite, MoS2, and boron nitride at room temperature has been proposed, utilizing shock compaction waves to induce fragmentation and exfoliation of layered materials. This technique results in lattice expansion and improvement of disorder-related modes in the nanostructured thin films, as confirmed by x-ray diffraction, high-resolution transmission electron microscopy, Raman spectra, and x-ray photoelectron spectra analysis.
Article
Green & Sustainable Science & Technology
Jinsik Kim, Doo-Man Chun, Hyung Wook Park, Jisoo Kim
Summary: Porosity is a common issue in powder bed fusion-based additive manufacturing, hindering the underwater application of printed products. This study presents the surface treatment of polyamide 12 (PA12) using large pulsed electron beam (LPEB) irradiations, which effectively reduces surface roughness and porosity. The treatment also enhances hydrophobicity and eliminates the capillary effect, making the PA12 suitable for underwater applications.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2023)
Article
Polymer Science
Van-Ta Do, Ngoc Giang Tran, Doo-Man Chun
Summary: Superhydrophobic surfaces with two-level micro-nano hierarchical polymer structures were successfully fabricated, showing superhydrophobicity with mechanical robustness.
Article
Nanoscience & Nanotechnology
Ngoc Giang Tran, Doo-Man Chun
Summary: Superhydrophobic metallic surfaces with special properties have attracted attention in both research and industry. This study developed an eco-friendly postprocess to simplify the fabrication process and reduce the time. The laser areal fluence parameter was also explored as a way to adjust water adhesion behavior.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Polymer Science
Oyunchimeg Erdene-Ochir, Van-Ta Do, Doo-Man Chun
Summary: A facile and low-cost method was presented to fabricate flexible superhydrophobic films with excellent mechanical durability and chemical stability using a hot-roll lamination process. The films displayed outstanding superhydrophobic properties and maintained high contact angles and low sliding angles even after multiple tests, showcasing promising self-cleaning and water droplet bouncing performance.
Article
Chemistry, Physical
Van-Ta Do, Doo-Man Chun
Summary: Freshwater shortages pose a threat to ecosystems and human communities worldwide. Inspired by the water collection abilities of cacti and desert beetles, researchers have successfully developed a simple and low-cost method of fabricating a surface that efficiently harvests water. This was achieved by spraying a solution of isopropyl alcohol and a mixture of hydrophobic and hydrophilic silica nanoparticles onto a laminating film, followed by hot-press lamination with sandpaper. The resulting surface exhibited wettability contrast patterns and achieved a high water-harvesting efficiency.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Materials Science, Multidisciplinary
A. G. Abd-Elrahim, Doo-Man Chun
Summary: Two-dimensional nanomaterials, such as graphene nanosheets and molybdenum disulfide nanoflakes, were hybridized with spinel Mn3O4 through a simple kinetic spray approach. The resulting heterostructured Mn3O4-2D hybrid nanocomposites showed improved reaction kinetics for oxygen evolution. The hybrid nanocomposites exhibited decreased overpotential and improved charge transfer kinetics, leading to enhanced stability for prolonged galvanostatic polarization.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Physics, Multidisciplinary
Manar A. Ali, Doo-Man Chun, E. M. M. Ibrahim, A. G. Abd-Elrahim
Summary: CdS quantum dots were synthesized and characterized. The analysis showed the presence of bi-structural phases and small crystallite size, resulting in high DC conductivity and small activation energy. Furthermore, the AC conductivity and dielectric constant of CdS quantum dots exhibited temperature-dependent behavior.
