Article
Engineering, Electrical & Electronic
Mihajlo D. Radmilovic, Branka D. Muric, Dusan Grujic, Boban Zarkov, Marija Z. Nenadic, Dejan V. Pantelic
Summary: The technology utilizes low-end direct laser writing on a biocompatible, environmentally friendly hydrogel to produce high-quality microoptical components quickly and controllably, suitable for rapid prototyping and serial production.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Optics
Jiang Li, Ruixiang Zhu, Yuxiang Huang
Summary: Microstructures play a crucial role in the preparation of functional surfaces, including self-cleaning, anti-icing, and drag reduction. This study utilized a picosecond laser to fabricate microstructures on a two-layer substrate, achieving different microlines and swelling structures through adjusting scanning speed and laser irradiation time. The method demonstrated potential for preparing microlens arrays and other functional microstructures.
Review
Optics
Jia-Wei Tan, Gong Wang, Yunfei Li, Yu Yu, Qi-Dai Chen
Summary: Micro-optical components have significant potential applications in imaging, optical fiber communication, and aerospace due to their small size, light weight, and flexible design. Fabricating micro-optical components on hard brittle materials is crucial for improving stability and expanding the optical transmission range. This study reviews recent advances in refractive/diffractive micro-optical components using femtosecond laser processing technologies, and summarizes their applications in imaging, sensing, display, and integration, highlighting the challenges and outlook of femtosecond laser processing technologies for micro-optical components.
LASER & PHOTONICS REVIEWS
(2023)
Article
Engineering, Electrical & Electronic
Zikui Shen, Zhidong Jia, Yanpeng Hao, Zhenyu Xin, Xilin Wang
Summary: This paper proposes a fabrication method for adaptive dielectric gradient components and presents experimental results on the improvement of flashover voltage using this method. The results show that the flashover voltage can be significantly increased by using this method, and the improvement is affected by the non-uniformity of the initial electric field. This method is expected to promote the widespread use of dielectric gradient insulating components in industrial applications.
Article
Optics
Jia-Xin Zheng, Ke-Shuai Tian, Jin-Yong Qi, Ming-Rui Guo, Xue-Qing Liu
Summary: This review focuses on the recent advancements in femtosecond laser with etching fabrication of micro-optical components of various materials. It introduces the femtosecond laser modification, wet and dry etching processes of various materials. The methods and applications of optical components fabricated by femtosecond laser with etching are discussed based on their types.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Polymer Science
Vitalij Fiodorov, Karolis Ratautas, Zenius Mockus, Romualdas Trusovas, Lina Mikoliunaite, Gediminas Raciukaitis
Summary: A low-cost laser-assisted method for the selective deposition of copper tracks on polymer surfaces by electroplating is reported. The technique utilizes a laser for the selective modification of the polymer surface, allowing the fabrication of copper tracks on complex shape dielectric materials.
Article
Optics
Xiaolong Li, Jian Xu, Aodong Zhang, Huaiyu Peng, Jie Zhang, Yucen Li, Ming Hu, Zijie Lin, Yunpeng Song, Wei Chu, Zhenhua Wang, Ya Cheng
Summary: Utilizing a combination of femtosecond laser-assisted chemical etching, electroless plating, and mechanical polishing, a technique has been proposed for fabricating embedded metallic microheaters, microheater arrays, and microthermal sensors. This technique enables uniform and controllable temperature distributions, flexible manipulation of localized temperature, and precise calibration of microheaters. The integration of microheaters also allows for precise control of temperature in glass channels and acceleration of chemical reactions in microfluidics, showing potential for developing multifunctional thermal-control microfluidic devices through laser manufacturing.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Physical
Lingjie Li, Zhonghao Ning, Wenyan Huang, Liang Liao, Yinong Zheng, Kun Zhuang, Siqi Lan, Yinggan Zhang, Rongqian Yao
Summary: A new method for preparing SiC(Al, rGO) bulk ceramics via repyrolysis of SiC(Al, rGO)(p)/PACS-VTES-GO blends is proposed, where the addition of Al improves mechanical properties and high temperature resistance. The repyrolysis temperature also plays a crucial role in determining the final performance of the materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Chemical
Haoran Xu, Jihai Zhang, Jin Feng, Tao Zhou
Summary: Selective metallization using 1064 nm pulsed near-infrared laser activation was employed to fabricate copper patterns on polydimethylsiloxane (PDMS) substrates. Copper patterns exhibited strong mechanical adhesion and good conductivity, making them suitable for large-scale industrial applications.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Manufacturing
I. Ferretto, A. Sharma, D. Kim, N. M. Della Ventura, X. Maeder, J. Michler, E. Hosseini, W. J. Lee, C. Leinenbach
Summary: This study demonstrates the tailoring of microstructure in FeMnSi-based shape memory alloys through laser powder bed fusion. By manipulating the processing parameters, variations in microstructure and phase composition can be achieved, leading to a combination of pronounced shape memory effect and ultrahigh strength in the fabricated materials.
ADDITIVE MANUFACTURING
(2023)
Article
Polymer Science
Ekaterina I. Shishatskaya, Natalia O. Zhila, Alexey E. Dudaev, Ivan V. Nemtsev, Anna V. Lukyanenko, Tatiana G. Volova
Summary: The results of surface modification using a CO2 laser on solvent casting films made from different compositions of polyhydroxyalkanoates (PHAs) show that the modification affects the wetting contact angle, adhesion, and fibroblast growth. Continuous irradiation creates melted regions on the film surface, while quasi-pulse mode creates holes. The number of viable fibroblasts is higher in the quasi-pulse mode compared to the continuous mode.
Article
Nanoscience & Nanotechnology
Lida Xu, Zaifu Cui, Lanlan Li, Yingping He, Chao Wu, Guochun Chen, Xin Li, Gonghan He, Zhenyin Hai, Qinnan Chen, Daoheng Sun
Summary: This study proposes a novel method of rapid in situ fabrication of polymer-derived ceramic (PDC) composite thin-film sensors by laser pyrolysis, which can quickly obtain a sensitive PDC composite film layer with high-quality graphite and is more flexible and efficient compared to traditional furnace thermolysis. The reaction differences between laser pyrolysis and furnace thermolysis are also analyzed. The approach pioneers the in situ laser fabrication of functional PDC films for sensors and shows great potential for in situ sensing of complex curved surfaces in harsh environments.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Akbar Aliasgharzadeh, Vahid Anaraki, Daryoush Khoramian, Mahdi Ghorbani, Bagher Farhood
Summary: This study evaluates the dosimetric characteristics of PASSAG gel dosimeter for different amounts of components in its formulation. It was found that the optimized PASSAG gel dosimeter showed increased sensitivity and excellent linear dose response, with dose resolution values varying in the 0-10 Gy range. Temporal stability in R-2 values was observed during 15-30 days post-irradiation, with R-2 dose sensitivity varying over the 30-day period.
RADIATION PHYSICS AND CHEMISTRY
(2022)
Article
Instruments & Instrumentation
Guoxiao Yin, Min Yu, Xiaojie Tong, Yuwei Wu, Chengbo Tian, Yang Li
Summary: In this study, Nafion rods with different diameters were prepared using an extrusion process, and high-quality cylindrical IPMCs with Pt electrode layers were prepared by electroless plating. The experimental results show that the prepared IPMCs have excellent electromechanical properties, with increasing diameter leading to significant improvements in blocking force and counter back-relaxation ability. IPMCs with a diameter of 3.0 mm under a DC voltage exhibit high blocking force and power density. Moreover, thick cylindrical IPMCs demonstrate exceptional load capacity by lifting objects 400 times their weight, showcasing the great potential for realizing artificial muscles.
SMART MATERIALS AND STRUCTURES
(2022)
Article
Chemistry, Multidisciplinary
A. Singh, S. Thakur
Summary: The widespread utility of molybdenum diselenide (MoSe2) and other transition metal dichalcogenides in various fields is limited due to inertness and low conductivity. However, incorporating polymers with MoSe2 can help overcome these limitations by achieving uniform dispersion and reducing self-adherence. The conductive and redox behavior of polymers are also utilized when continuous conductivity is required. The choice of polymerization method plays a significant role in the properties of the nanocomposites formed.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Dentistry, Oral Surgery & Medicine
Irma Dumbryte, Mangirdas Malinauskas
Summary: The study found an increase in the number of enamel microcracks after removing metal brackets. Patients with visible EMCs were more likely to experience tooth sensitivity to cold after debonding.
AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS
(2021)
Review
Nanoscience & Nanotechnology
Edvinas Skliutas, Migle Lebedevaite, Elmina Kabouraki, Tommaso Baldacchini, Jolita Ostrauskaite, Maria Vamvakaki, Maria Farsari, Saulius Juodkazis, Mangirdas Malinauskas
Summary: Ultrafast laser 3D lithography based on multi-photon lithography offers precise rapid prototyping and flexible additive manufacturing options, yet there is still incomplete understanding regarding factors like spatial resolution, accuracy, fabrication throughput, repeatability, and material properties.
Article
Physics, Applied
Simonas Varapnickas, Samlan Chandran Thodika, Fabien Morote, Saulius Juodkazis, Mangirdas Malinauskas, Etienne Brasselet
Summary: This study reports on the design, production, and characterization of dielectric metasurface birefringent optical retarders made from femtosecond laser 3D printing technology, with a polarization conversion efficiency more than 10 times larger than previously reported. The flexibility of the fabrication process allows for arbitrary orientation of the artificially engineered optical axis, opening up new possibilities for 3D printed geometric phase optical elements.
APPLIED PHYSICS LETTERS
(2021)
Article
Polymer Science
Sigita Grauzeliene, Aukse Navaruckiene, Edvinas Skliutas, Mangirdas Malinauskas, Angels Serra, Jolita Ostrauskaite
Summary: This study focuses on enhancing the performance of thermosets by combining photo- and thermal polymerization, using renewable resources instead of petroleum-based materials. By studying thiol-epoxy reactions and examining rheological properties, the most suitable formulations for laser direct writing were selected. The dual cured thermosets showed higher rigidity, tensile strength, and thermal stability, demonstrating their potential for high-resolution 3D printing.
Correction
Physics, Applied
Simonas Varapnickas, Samlan Chandran Thodika, Fabien Morote, Saulius Juodkazis, Mangirdas Malinauskas, Etienne Brasselet
APPLIED PHYSICS LETTERS
(2021)
Article
Polymer Science
Justinas Jaras, Aukse Navaruckiene, Edvinas Skliutas, Jurga Jersovaite, Mangirdas Malinauskas, Jolita Ostrauskaite
Summary: Novel thermo-responsive shape-memory vanillin-based photopolymers have been developed with excellent shape-memory properties, able to maintain temporary shapes on non-flat surfaces. By adjusting the ratio of monomers to tune the reaction mechanisms, a wide range of thermal and mechanical properties of the photopolymers was achieved.
Article
Polymer Science
Vilte Sereikaite, Aukse Navaruckiene, Justinas Jaras, Edvinas Skliutas, Dimitra Ladika, David Gray, Mangirdas Malinauskas, Vaidas Talacka, Jolita Ostrauskaite
Summary: A novel dual cure photopolymerizable system was developed using two plant-derived acrylic monomers and a thiol monomer. The resin composition was carefully selected to overcome stability/premature polymerization problems and resulted in a stable and selectively-polymerizable resin. The developed resin demonstrated rapid photocuring, improved mechanical properties, and thermal stability compared to other vanillin-based polymers.
Review
Materials Science, Multidisciplinary
Diana Gonzalez-Hernandez, Simonas Varapnickas, Andrea Bertoncini, Carlo Liberale, Mangirdas Malinauskas
Summary: The field of 3D micro-optics is rapidly expanding, with key advances in femtosecond laser direct-write 3D multi-photon lithography. Micro-optics fabricated via this technique have shown impressive potential in beam shaping, advanced imaging, optical sensing, and integrated photonic circuits, attracting increasing industrial interest.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Giedrius Balcas, Mangirdas Malinauskas, Maria Farsari, Saulius Juodkazis
Summary: This article provides an overview of a recent advancement in optical 3D printing, where crosslinkable materials and nanomaterial fillers are polymerized and guided to form final structures and new composites through high temperature annealing (HTA). By using ultrafast laser direct writing, 3D nano/micro-structures are defined and their precursor composition is tailored for subsequent tunability of final properties during the HTA process at temperatures between 750-1500 degrees C. This method takes advantage of efficient pyrolysis and calcination, facilitated by the large surface-to-volume ratio conditions, to enable chemical exchange between glass/ceramic and surrounding materials.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
D. Gonzalez-Hernandez, B. Sanchez-Padilla, D. Gailevicius, S. Chandran Thodika, S. Juodkazis, E. Brasselet, M. Malinauskas
Summary: By studying the effect of laser exposure on materials, adjustable refractive index micro-optical devices can be manufactured with 3D nanolithography. The refractive index of micro-lenses is influenced by material density and morphology, and can be controlled through optimization of exposure. This research opens up possibilities for printing complex 3D shapes with desired refractive properties.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Analytical
Haoran Mu, Daniel Smith, Tomas Katkus, Darius Gailevicius, Mangirdas Malinauskas, Yoshiaki Nishijima, Paul R. Stoddart, Dong Ruan, Meguya Ryu, Junko Morikawa, Taras Vasiliev, Valeri Lozovski, Daniel Moraru, Soon Hock Ng, Saulius Juodkazis
Summary: Microlens arrays (MLAs) were fabricated using a femtosecond direct laser write (fs-DLW) technique, allowing high-fidelity definition of 3D surfaces on IR transparent substrates. A graphene oxide (GO) grating acting as a linear polariser was also fabricated by fs-DLW. The MLAs and GO polarisers were characterised and their performance was simulated through numerical modelling with good agreement between experimental results and simulations.
Article
Optics
Darius Gailevicius, Rokas Zvirblis, Karolis Galvanauskas, Gintare Bataviciute, Mangirdas Malinauskas
Summary: Laser Direct Writing (LDW) is a promising technique for fabricating complex free-form elements, including micro-optical functional components. This study investigates the impact of calcination on LDW-produced, sol-gel-derived glass micro-structures in terms of Laser-Induced Damage Threshold (LIDT). The results show that calcination can significantly increase LIDT, enhancing the resilience and usefulness of these free-form micro-optics.
Article
Materials Science, Multidisciplinary
Greta Merkininkaite, Darius Gailevicius, Laurynas Staisiunas, Egle Ezerskyte, Rokas Vargalis, Mangirdas Malinauskas, Simas Sakirzanovas
Summary: This paper proposes a combination of precursor synthesis, laser lithography, and pyrolysis to fabricate hard ceramic SiOC 3D microstructures. Precursors are hybrid organosilicon materials prepared using sol-gel method and enabled laser photopolymerization process. Hard ceramic structures with high hardness and reduced elastic modulus are obtained after high-temperature pyrolysis under nitrogen atmosphere. The advantages of this method include the absence of shrinkage defects, smooth surfaces, and improved printing resolution.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Metallurgy & Metallurgical Engineering
Antanas Butkus, Edvinas Skliutas, Darius Gailevicius, Mangirdas Malinauskas
Summary: In this study, a novel femtosecond laser direct writing method was reported, which can structure pre-polymers without using photo-initiators. The experimental work is of high importance for widening the applications of laser additive manufacturing.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Dentistry, Oral Surgery & Medicine
Vygandas Rutkunas, Agne Gedrimiene, Reinhilde Jacobs, Mangirdas Malinauskas
Summary: This study assessed the fit and cement gap of fixed partial dentures supported by two implants made using conventional and digital workflows. The digital workflow showed lower cement gap values compared to the conventional method, but larger misfit was detected when measured on the verified master cast.
INTERNATIONAL JOURNAL OF ORAL IMPLANTOLOGY
(2021)