Article
Chemistry, Analytical
Li Liang, Xuejia Hu, Yang Shi, Shukun Zhao, Qinghao Hu, Minhui Liang, Ye Ai
Summary: This paper introduces a novel optofluidic method for fabricating tunable liquid microlens arrays (MLAs) and demonstrates their ability to achieve tunable focusing and high-quality imaging. The focal length of the MLAs can be adjusted by changing the refractive index of the liquid droplets, showing promising opportunities for various applications.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Dandan Han, Tianchun Ye, Yayi Wei
Summary: In this paper, a cost-effective and high-fidelity nanolithography technique is proposed, which combines the high-resolution capability of maskless plasmonic lithography with the spatial morphology controllability of grayscale lithography. The technique allows for the generation of customized patterns from microscale to nanoscale, and has wide applications in various fields including integrated circuits, MEMS/NEMS, optical devices, and nanophotonics.
NANOSCALE ADVANCES
(2023)
Article
Optics
Mohammad H. Bitarafan, Shambhavee Annurakshita, Juha Toivonen, Godofredo Bautista
Summary: A high-speed optical technique for fabricating plasmonic metasurfaces in polymer films was demonstrated using a programmable spatial light modulator to control photoreduction sites of gold ions. After irradiation and annealing, nanoparticle growth was induced to create plasmonic microstructures with tunable properties. This cost-effective and straightforward light-based approach enables the creation of plasmonic metasurfaces with arbitrary orientations.
Article
Nanoscience & Nanotechnology
Alonit Kafri, Debopriya Dutta, Subhrajit Mukherjee, Pranab K. Mohapatra, Ariel Ismach, Elad Koren
Summary: A novel maskless device fabrication technique utilizing a thermally activated cyclic polyphthalaldehyde resist was presented for rapid prototyping of 2D-based electronic materials. Laser-induced electronic doping was investigated for areas beneath metal contacts, resulting in effective changes in doping levels depending on laser intensity. The fabricated devices showed low contact resistance attributed to laser-induced n-type doping at metal contact regions.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Coatings & Films
Zhongxu Lian, Yi Cheng, Zheming Liu, Qianqian Cai, Jin Tao, Jinkai Xu, Yanling Tian, Huadong Yu
Summary: This work presents a novel method to fabricate armor microstructure arrays with square micro pits on the surface of 304 stainless steel based on maskless electrochemical machining technology. The morphology and wettability of the microstructure arrays can be well controlled by adjusting the voltage parameters. The fabricated superhydrophobic surface with armor microstructure arrays not only effectively reduces the corrosion tendency of the substrate, but also shows excellent tribological properties even under different corrosion potentials. It is believed that maskless electrochemical machining technology enables scalable fabrication of superhydrophobic microstructure arrays.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Qian-Hua Li, Guo-Juan Xu, Chang Cheng, Rong Zou, Xiao-Jie Li, Ren-De Ma, Hong-Zhong Cao
Summary: The authors systematically investigated the influence factors for two-photon maskless lithography of S1813 photoresist. They fabricated a trench with a width of 155 nm, about 1/5 of the laser wavelength, by accurately tuning the scanning speed. They proposed and studied a method called two-photon shape-modulated maskless lithography, which employs different combined scanning and exposing approaches. Using this method, they fabricated patterns of rectangle, parallelogram, rice grain, arc, and x letter, as well as quatrefoil hole patterns with different shape hearts. This work provides a protocol for lithography of S1813 photoresist with high spatial resolution and flexibility.
Article
Physics, Applied
T. Stavenga, S. A. Khan, Y. Liu, P. Krogstrup, L. DiCarlo
Summary: Quantum hardware based on circuit quantum electrodynamics utilizes airbridges to suppress unwanted wave propagation modes and enable transmission lines to cross. Grayscale lithography is used to reduce the peak temperature of the airbridge fabrication process and increase the physical yield of transmon qubits with Josephson elements.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Jiaxu Huang, Kang Xu, Jin Hu, Dandan Yuan, Jun Li, Jingyu Qiao, Shaolin Xu
Summary: This paper proposes a self-aligned lithography technique that utilizes laser interference to create long-range ordered 2D nanostructures. The technique offers a high degree of controllability and can be applied to different materials for nanopatterning.
Article
Nanoscience & Nanotechnology
Binqiang Li, Liang Wang, Binbin Wang, Donghai Li, J. P. Oliveira, Ran Cui, Jianxin Yu, Liangshun Luo, Ruirun Chen, Yanqing Su, Jingjie Guo, Hengzhi Fu
Summary: In this study, NiTi shape memory alloy parts were additively manufactured using EBF3. The effects of different processing parameters on the forming quality and properties were investigated. The optimized deposit exhibited the best comprehensive properties, and the relationship between martensitic transformation behavior and plastic deformation during superelastic deformation was discussed.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Manufacturing
M. M. Emami, M. Jamshidian, D. W. Rosen
Summary: A phenomenological model of a single-shot grayscale photopolymerization process is developed and utilized for microlens fabrication within a virtual process planning framework. Simulation and experimental results suggest that chemical and thermal shrinkages may compromise the dimensional accuracy of the final part due to strong adhesion of the solidified part to the rigid substrate.
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
(2021)
Article
Energy & Fuels
Warisara Woranuch, Kanokwan Ngaosuwan, Worapon Kiatkittipong, Doonyapong Wongsawaeng, Weerinda Appamana, Jon Powell, Samuel Lalthazuala Rokhum, Suttichai Assabumrungrat
Summary: In recent years, attention has been focused on the use of heterogeneous catalysts, with CaO powder being considered a promising catalyst for biodiesel production. Through investigation of catalyst pellet fabrication parameters, it was found that using an Al2O3 binder resulted in higher catalytic activity compared to kaolin and diatomite supported catalysts. The CaO to Al2O3 mass ratio significantly affected surface area and total basicity, with the CaO-A(800)-3.5:1 catalyst showing the highest biodiesel yield due to the presence of multiple active crystal phases.
Article
Materials Science, Multidisciplinary
Tianxu Jia, Xiangxian Wang, Yaqian Ren, Yingwen Su, Liping Zhang, Hua Yang, Yunping Qi, Weiming Liu
Summary: This study demonstrates the fabrication of diverse microstructures by controlling the angle of incidence in a six-beam laser interference lithography system, which significantly influences the shape and period of the lattice. The technique is expected to benefit microstructure fabrication due to its simple operation, large writing area, and low cost, promoting the development of micro-optics.
Article
Materials Science, Multidisciplinary
Guoqiang Zhu, Liang Wang, Binbin Wang, Binqiang Li, Junbo Zhao, Bao Ding, Ran Cui, Botao Jiang, Chunzhi Zhao, Baoxian Su, Liangshun Luo, Ruirun Chen, Yanqing Su, Jingjie Guo
Summary: The electron beam freeform fabrication (EBF3) technique is used to prepare a titanium/steel multi-material system. The addition of copper as an interlayer improves the interface strength and suppresses the formation of intermetallic compounds. The Ti64/Cu interface exhibits high micro-hardness and shear strength due to the synergy between the copper-rich solid solution and interdendritic Cu-Ti intermetallic compounds.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Guoqiang Zhu, Yichen Wang, Liang Wang, Binbin Wang, Ran Cui, Binqiang Li, Baoxian Su, Chen Liu, Ruirun Chen, Liangshun Luo, Yanqing Su, Jingjie Guo
Summary: The Ti-6.5Al-2Zr-Mo-V (TA15) alloy with gradient characteristics fabricated via electron beam freeform fabrication (EBF3) technology exhibits different mechanical properties due to its gradient microstructure. The top region of the TA15 deposit has the best comprehensive properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Ceramics
Justin Jetter, Jascha Rohmer, Maike Wegner, Eckhard Quandt
Summary: This article discusses the successful formation of a stable twinned monoclinic phase in ZrO2-based ceramics, as well as the impact of yttria addition and sintering conditions on this process.
CERAMICS INTERNATIONAL
(2021)
Article
Biochemical Research Methods
Sangkwon Han, Hyung Jong Bae, Su Deok Kim, Wook Park, Sunghoon Kwon
Article
Chemistry, Physical
K. Zobel, S. E. Choi, R. Minakova, M. Gocyla, A. Offenhaeusser
Article
Multidisciplinary Sciences
Hyung Jong Bae, Sangwook Bae, Jinsik Yoon, Cheolheon Park, Kibeom Kim, Sunghoon Kwon, Wook Park
Article
Biochemical Research Methods
Daewon Lee, Amos Chungwon Lee, Sangkwon Han, Hyung Jong Bae, Seo Woo Song, Yunjin Jeong, Dong Yoon Oh, Seongkyu Cho, Junhoi Kim, Wook Park, Sunghoon Kwon
Article
Medicine, General & Internal
Yong-Gyun Jung, Young-Ran Yun, Suk-Heung Song, Wook Park
JOURNAL OF KOREAN MEDICAL SCIENCE
(2018)
Review
Biochemical Research Methods
Suk-Heung Song, Jin Hyuk Lee, Jinsik Yoon, Wook Park
Article
Biochemical Research Methods
Sung Min Nam, Kibeom Kim, Il-Suk Kang, Wook Park, Wonhee Lee
Article
Biochemistry & Molecular Biology
Wook Park, Seoyoung Jang, Tae Woo Kim, Junghyun Bae, Tong In Oh, EunAh Lee
MACROMOLECULAR BIOSCIENCE
(2019)
Article
Multidisciplinary Sciences
Yeongjae Choi, Taehoon Ryu, Amos C. Lee, Hansol Choi, Hansaem Lee, Jaejun Park, Suk-Heung Song, Seojoo Kim, Hyeli Kim, Wook Park, Sunghoon Kwon
SCIENTIFIC REPORTS
(2019)
Correction
Biochemistry & Molecular Biology
Wook Park, Seoyoung Jang, Tae Woo Kim, Junghyun Bae, Tong In Oh, EunAh Lee
MACROMOLECULAR BIOSCIENCE
(2019)
Article
Polymer Science
Cheolheon Park, Junghyun Bae, Yeongjae Choi, Wook Park
Summary: The study demonstrates the production of microparticles with high deformability and effective volume while emphasizing the importance of void fraction in particle deformation. A new effective volume index (V*) is defined to indicate the ratio of a particle's total volume to void and material structures. Spiral-shaped microparticles exhibit higher deformation ratios compared to other shapes at the same effective volume index.
Review
Chemistry, Analytical
Srivathsan Kalyan, Corinna Torabi, Harrison Khoo, Hyun Woo Sung, Sung-Eun Choi, Wenzhao Wang, Benjamin Treutler, Dohyun Kim, Soojung Claire Hur
Summary: Inertial microfluidics technology plays a crucial role in fast and accurate detection of diseased cells or pathogens. By leveraging the principle of inertial focusing, this technology enables the isolation and enrichment of target bioparticles from liquid samples, with various applications such as particle purification, solution exchange, and on-chip particle alignment. This comprehensive review highlights the contribution of inertial microfluidics to improving the accuracy of various assays for clinically relevant information, showcasing its potential in real-world applications and the evolving outlook of the field.
Article
Chemistry, Analytical
Hyeli Kim, Goomin Kwon, Cheolheon Park, Jungmok You, Wook Park
Summary: An anti-counterfeiting tag technology is developed using silver nanowires, which has high visible light transmittance and high infrared emissivity. The tag is observable with a thermal imaging camera and can contain multiple grayscale patterns. This technology provides better protection against counterfeiting.
Article
Polymer Science
Jihyeon Park, Youngsu Kim, Narasimharao Kitchamsetti, Seungju Jo, Seungjae Lee, Jubin Song, Wook Park, Daewon Kim
Summary: Considerable research efforts have been directed towards achieving advanced design of electroactive materials and unique structures in supercapacitor electrodes for high-performance energy storage systems. This study proposes the development of novel electroactive materials with an enlarged surface area for sandpaper materials, and their successful synthesis and characterization. The optimized Fe0.75V0.25 LDHs coated on #15000 grit Ni-sputtered sandpaper exhibit high energy and power density, making them suitable as advanced battery-type electrodes in hybrid supercapacitor assembly.
Article
Physics, Applied
Jinsik Yoon, Kibeom Kim, Wook Park
APPLIED PHYSICS LETTERS
(2017)