Article
Chemistry, Multidisciplinary
Mizue Mizoshiri, Kyohei Yoshidomi, Namsrai Darkhanbaatar, Evgenia M. Khairullina, Ilya I. Tumkin
Summary: The study demonstrates the direct writing of cobalt/cobalt oxide composites using femtosecond laser reductive sintering of Co3O4 nanoparticles on different substrates. The results show that polymer substrates affect the oxidation of the patterns, and this direct writing technique is promising for the application of catalysts and detectors in microsensors.
Article
Chemistry, Physical
Mizue Mizoshiri, Kyohei Yoshidomi
Summary: The study investigates the effect of inert gas injection on Cu patterning through femtosecond laser reductive sintering of CuO nanoparticles. The reduction degree of copper oxides in the patterns was found to increase with higher injection rates of N-2 and Ar gases, but excessive rates led to decreased surface density of the patterns. The results demonstrated the potential for vacuum-free direct writing of metal patterns using femtosecond laser reductive sintering under inert gas injection.
Article
Chemistry, Physical
Natalia V. Bulina, Sergey G. Baev, Svetlana V. Makarova, Alexander M. Vorobyev, Alexander I. Titkov, Victor P. Bessmeltsev, Nikolay Z. Lyakhov
Summary: This study focused on the laser irradiation treatment of mechanochemically synthesized hydroxyapatite with a wavelength of 10.6 μm, demonstrating that selective laser melting technology can be used to produce biodegradable implants with acceptable properties.
Article
Physics, Applied
Yuen-Ting Rachel Chau, Hsin-hui Huang, Mai Thanh Nguyen, Koji Hatanaka, Tetsu Yonezawa
Summary: In this study, Cu or Cu/Au samples were sputtered on Si substrates and subjected to annealing at various temperatures. THz radiation was detected from samples annealed at temperatures ranging from 80 to 170 degrees C, with the Cu2O/Cu interface identified as the source. The Cu/Au/Si sample annealed at 80 degrees C exhibited the highest THz radiation, attributed to the presence of a porous Cu2O layer with high laser absorption and the reflective properties of the Au film enhancing the laser absorption through the Fabry-Perot effect.
APPLIED PHYSICS EXPRESS
(2021)
Article
Chemistry, Multidisciplinary
Eszter Nagy, Attila Andrasik, Tamas Smausz, Tibor Ajtai, Fruzsina Kun-Szabo, Judit Kopniczky, Zoltan Bozoki, Piroska Szabo-Revesz, Rita Ambrus, Bela Hopp
Summary: Pulsed laser ablation has been shown to significantly reduce particle size of drugs, improving dissolution rate and bioavailability. This technique was successfully applied to meloxicam, a drug with poor water solubility, yielding promising results in both air and distilled water environments. The formation of nanoaggregates during laser ablation in air, a phenomenon rarely studied before, was also observed.
Article
Environmental Sciences
Guang Zhu, Lei Chen, Ting Lu, Li Zhang, Md Shahriar A. Hossain, Mohammed A. Amin, Yusuke Yamauchi, Yanjiang Li, Xingtao Xu, Likun Pan
Summary: The design of a high-performance electrode material, Cu/Cu2O/C, consisting of Cu/Cu2O nanospheres anchored on porous carbon nanosheets, has been developed for efficient capacitive deionization (CDI). The hybrid architecture exhibits a hierarchically porous structure with a high specific surface area and large pore volume, favoring ion migration and diffusion. The Cu/Cu2O/C hybrid architecture shows a high specific capacitance and desalination capacity, as well as good cycling stability, making it a promising cathode material for CDI.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Manufacturing
Xiangyu Chen, Mengsen Zhang, Jianqin Zhu, Zhi Tao, Lu Qiu
Summary: Laser sintering is an important technology in additive manufacturing and flexible electronics, with the mechanical and electrical performances of fabricated devices strongly influenced by the sintering regime and melt pool flow state. While much attention has been given to laser parameters and deposition patterns, the effects of substrate materials have been largely overlooked. This study investigates the laser sintering characteristics of Cu nanoparticles deposited on a ceramic substrate, determining four different sintering regimes based on the thermal response of ceramics at varying laser powers and scanning speeds. The study also proposes a modified energy density parameter and develops a theoretical model to predict the thickness of the internal molten layer and conductivity of the sintered circuit.
ADDITIVE MANUFACTURING
(2023)
Article
Chemistry, Physical
Asif Ur Rehman, Muhammad Ahsan Saleem, Tingting Liu, Kai Zhang, Fatih Pitir, Metin Uymaz Salamci
Summary: This research presents a slurry-based approach to fabricate ceramic components, which is an alternative to the traditional powder bed selective laser process (PBSLP). The study found that a high SiC content leads to chemical interaction that disrupts the melt pool and affects the sintering and melting quality. The analysis of the microstructure shows that the weight fraction of SiC has a significant impact on it, and a content lower than 2wt% leads to improved microstructure during the PBSLP process.
Article
Materials Science, Multidisciplinary
M. Krinitcyn, M. Ragulina, I Firsina, N. Travitzky
Summary: Commercial Ti3AlC2 MAX phase powder and Ti3AlC2/Cu powder blends were used to obtain bulk materials through selective laser sintering/melting technique. The stability of Ti3AlC2 composition was investigated with varying laser line energy, showing better maintenance of MAX phase structure with the addition of copper. Copper addition resulted in the formation of a metal matrix composite with a copper matrix and Ti3AlC2 inclusions.
Article
Materials Science, Multidisciplinary
Hyeon-Sik Ahn, Ae-Sun Oh, Dong-Hwan Kim, Yoonseuk Choi, Kyung-Hyun Kim, Hyun-Cheol Bae
Summary: This study explores the use of 3D printing technology for wiring processes in electronic packaging, developing a cost-effective Cu wiring method to replace the expensive Ag-based alternative. The Cu wiring process involves laser sintering in ambient conditions, proving to be a more efficient and affordable solution for electronic circuit printing.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Automation & Control Systems
Jorge Andres Ramos-Grez, Javier Vera-Hoffmann, Magdalena Walczak
Summary: Fabrication of metallic solid objects was achieved using an experimental SG-SLM 3D printer, which incorporates a cylindrical coordinate system called SGM. The effects of fabrication parameters, laser beam power, and powder layer thickness on the properties of 3D printed parts were evaluated. The experiments showed a decreasing trend in mass rate efficiency and an increase in mass density, but a decrease in ultimate stress. Microhardness was almost independent of volumetric energy density, while % porosity slightly increased.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Stefan Kefer, Kay Bischoff, Gian-Luca Roth, Julian Haubner, Bernhard Schmauss, Ralf Hellmann
Summary: This contribution presents electrically tunable polymer planar Bragg gratings based on bulk cyclic olefin copolymers. By simplifying the fabrication process, the device's tuning response can effectively be controlled via temperature changes induced by the copper conducting paths, resulting in a significant residual wavelength shift.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Chemistry, Physical
Ihsan Murat Kusoglu, Florian Huber, Carlos Donate-Buendia, Anna Rosa Ziefuss, Bilal Goekce, Jan T. Sehrt, Arno Kwade, Michael Schmidt, Stephan Barcikowski
Summary: The addition of nanoparticle additives has a positive impact on powder characteristics, processing behavior, microstructure, and part properties, necessitating a large-scale inter-laboratory study to obtain reliable data to validate their actual effects in the laser powder bed fusion process.
Article
Materials Science, Multidisciplinary
Yong Yu, Xiaoping Cai, Zhichao Shang, Yang Yu, Xiaohong Wang, Peizhong Feng
Summary: Three-dimensional continuous micro/nano porous Cu/Cu2O particles were successfully prepared using rapid powder sintering and dealloying. The particles can control the corrosion intensity through self shedding, resulting in bimodal pore size micron particles. The addition of MNPC, with eutectic point composition and particle morphology, greatly improved the degradation rate of MO from 1.4% to 86% within 10 min in a dark ultrasonic environment.
MATERIALS CHARACTERIZATION
(2023)
Article
Optics
Linas Jonusauskas, Arnoldas Pautienius, Egle Ezerskyte, Juozas Grigas, Deividas Andriukaitis, Henrikas Gricius, Tomas Baravykas, Dovile Andrijec, Rokas Vargalis, Greta Bandzeviciute, Arunas Stankevicius
Summary: This paper introduces a method of manufacturing cell growth scaffolds using direct laser writing technology. A chainmail architecture is proposed to print flexible scaffolds made of a mechanically rigid material. The printing procedure is optimized to achieve high precision and short printing times. The scaffolds show excellent biocompatibility and do not affect cell viability or proliferation. This method could be used in regenerative medicine for cell cultivation and direct implantation into soft tissue.
OPTICS AND LASER TECHNOLOGY
(2023)
