Article
Physics, Multidisciplinary
Yongkang Song, Weici Liu, Xiaolei Wang, Faqiang Wang, Zhongchao Wei, Hongyun Meng, Ning Lin, Hongqiang Zhang
Summary: This paper designs a temperature-controllable multifunctional Metasurface lens and a polarization-sensitive intensity-tunable metalens, which can achieve focus adjustment under different polarization states and change in output light intensity.
FRONTIERS IN PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Florian Hartmann, Lukas Penkner, Doris Danninger, Nikita Arnold, Martin Kaltenbrunner
Summary: Soft focus-tunable lenses offer practical voltage operation, a wide range of adjustable focal lengths, and millisecond response times by inflating a liquid-filled elastomeric lens membrane with electroactive polymers. Performance equivalent to human eyes is demonstrated with focal length changes between 22 and 550 mm in 260 ms at voltages below 500 V. The presented model, design rules, and fabrication methods address key challenges in soft electrostatic actuators and optical systems, paving the way for autonomous bio-inspired robots and machines.
Article
Optics
Danyang Wang, Degang Hu, Yanwu Zhou, Licun Sun
Summary: In this study, a focus-tunable liquid cylindrical lens based on electrowetting was designed and fabricated. By changing the supplied voltage, the proposed liquid cylindrical lens can serve as both a converging and diverging lens with a fast response time. By combining it with a fixed cylindrical lens, a cylindrical lens system with an arbitrary focal length can be realized.
Article
Physics, Multidisciplinary
Fei Wang, Zijian Zhuang, Zhangrong Qin, Binghai Wen
Summary: In this paper, the zooming process of a movable and focus-tunable electrowetting-on-dielectrics (EWOD) liquid lens is numerically investigated using the lattice-Boltzmann-electrodynamic (LB-ED) method. It is found that the lens changes from a convex lens to a concave lens with increasing voltage. The low-viscosity liquid exhibits oscillation while the high-viscosity liquid appears as overdamping. Methods are proposed to accelerate lens stabilization at low and high viscosities, achieving significant speed improvements.
Article
Materials Science, Multidisciplinary
Jin Yao, Mu Ku Chen, Rong Lin, Din Ping Tsai, Kwai-Man Luk
Summary: We propose a design strategy based on the phase compensation mechanism to continuously tune the properties of water-based meta-lenses at 5 GHz. By changing the filling height of water in the designed meta-lens, the focal length can be tuned from 228 to 424 mm. The off-axis focusing of the meta-lens is also demonstrated in which the deflection angle is adjustable from around 0 degrees to 5 degrees. This work will pave the way for designing tunable water-based meta-devices and facilitating their applications in microwave imaging systems.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Tao Chen, Jing-Yi Sun, Tian-Xin Ding, Pei-Tao Zheng, Qi-Rui Chen, Yue Chen, Zhong-Cheng Liang
Summary: This article proposes a method for manufacturing an electrowetting-on-dielectrics (EWOD) liquid lens based on a flexible wire electrode, and verifies its practicality and superior performance through experiments. It also points out the potential of this fabrication process for producing other optofluidic components.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2022)
Article
Polymer Science
B. . . Hermenegildo, R. M. Meira, A. G. Diez, D. M. Correia, S. Ribeiro, J. P. Serra, C. Ribeiro, L. Perez-Alvarez, Jose L. Vilas-Vilela, S. Lanceros-Mendez
Summary: This study reports on the development of oriented electrospun fibers and films based on PVDF and PHBV blended with the IL choline acetate. The inclusion of IL in the polymer matrix affects the fiber orientation and thermal properties, resulting in changes in melting temperature and surface characteristics. The materials also exhibit good ionic conductivity and cytocompatibility, showing potential for tissue engineering applications.
Article
Chemistry, Analytical
Jorabar Singh Nirwan, Shan Lou, Saqib Hussain, Muhammad Nauman, Tariq Hussain, Barbara R. Conway, Muhammad Usman Ghori
Summary: This study developed an imaging system based on electrically tunable lenses (ETLs) for quantitative surface analysis. The system was calibrated using the Tenengrad operator to ensure accurate depth measurement and correction of external influences on the ETL. The system was used to measure surface texture parameters of a model material and compared to optical profilometry, showing no significant differences between the two techniques.
Review
Chemistry, Multidisciplinary
Yuqing Dong, Ka-Wai Yeung, Chak-Yin Tang, Wing-Cheung Law, Gary Chi-Pong Tsui, Xiaolin Xie
Summary: This review provides an overview of the design and fabrication of IL-iEAP transducers for advanced applications in biological and electronic fields. It discusses the classification of iEAP with different actuation mechanisms and various preparation methods, as well as the advanced functions of IL-iEAP in actuating and sensing. The prospects of novel nanotechnologies used for fabricating IL-iEAPs and their applications in MEMS are also discussed.
NANOTECHNOLOGY REVIEWS
(2021)
Article
Engineering, Mechanical
Hanlu Li, Weihao Ren, Lin Yang, Chengcheng Ma, Siyu Tang, Ruijia Yuan
Summary: A tunable-focus liquid lens driven by a novel piezoelectric motor is proposed in this paper for adaptive eyeglass application. The motor can provide vertical force to change the lens curvature, allowing for precise adjustments within a certain range. Experimental testing shows the liquid lens exhibits stable zooming characteristics, suggesting potential for use in adaptive eyeglasses and mobile systems in the future.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Liliana C. Fernandes, Rafaela M. Meira, Daniela M. Correia, Clarisse Ribeiro, Eduardo Fernandez, Carmen R. Tubio, Senentxu Lanceros-Mendez
Summary: This study reports on the development of magnetically responsive nanofibers based on PVDF and MIL. The inclusion of MIL increases the polar beta-phase content and decreases the crystallinity and thermal stability of the fibers. The magnetization of the nanofibers is proportional to the MIL content and decreases with temperature. Furthermore, cytotoxicity assays show a decrease in cell viability with increasing MIL content.
Article
Nanoscience & Nanotechnology
Ziyu Hua, Guangxue Chen, Kai Zhao, Ren'ai Li, Minghui He
Summary: SALFDNICs, based on the concept of double-network design, exhibit excellent self-adhesive properties, can maintain good adhesion on different substrates, and have good self-healing properties, good stretchability, and promising conductivity.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Guoqiang Li, He Yang, Danying Zuo, Jing Xu, Hongwei Zhang
Summary: The development of supramolecular GPEs based on deep eutectic solvents (DES) provides a stable voltage window for carbon-based EDLCs. The addition of quinhydrone can further increase the specific capacitance and energy density of the EDLC.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Optics
Zhanna Zemska, Tigran Galstian
Summary: This electrically tunable liquid crystal lens can generate a variety of wavefronts and has a simplified manufacturing process and multiple driving modes, making it promising for revolutionary applications in fields such as miniature cameras and microscopes.
Article
Engineering, Chemical
Yunfei Yu, Xue Yang, Chenchen Zhang, Jie Chen, Wei Lin, Jianqiang Meng
Summary: This study reports an environmentally friendly and simple approach for preparing double-network (DN) ion gel membranes with high strength and excellent gas separation performance. By optimizing crosslinking density, mass ratio, and the type and content of free ionic liquid, the mechanical and gas separation properties of the DN membrane are improved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Chemistry, Multidisciplinary
Yong Hae Heo, Dong-Soo Choi, In-Ho Yun, Sang-Youn Kim
APPLIED SCIENCES-BASEL
(2020)
Article
Nanoscience & Nanotechnology
Dong-Soo Choi, Tae-Hoon Kim, Seok-Han Lee, Changhyun Pang, Jin Woo Bae, Sang-Youn Kim
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Nanoscience & Nanotechnology
Jin Woo Bae, Dong-Soo Choi, In-Ho Yun, Dong-Heon Han, Seung-Ju Oh, Tae-Hoon Kim, Jeong Ho Cho, Liwei Lin, Sang-Youn Kim
Summary: Researchers have developed a polyvinyl chloride-based gel with high transparency and ultra-soft rubber-like behavior under a weak electric field using a new synergistic plasticization method. This gel is used to create a self-contained biconvex microlens capable of adjusting focal lengths, deforming into various shapes to improve aberrations, and operating silently with low power consumption.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Instruments & Instrumentation
Choi Dong-Soo, SeongWon Jeong, Seok-Han Lee, SiHo Ryu, Sang-Youn Kim
Summary: The bidirectional soft haptic I/O module proposed in this paper is capable of sensing both static and dynamic pressure, as well as controlling the amplitude of vibrotactile sensation. By measuring the dielectric and mechanical properties of the bpPVC gel, the optimal weight ratio of PVC and plasticizers was investigated. Experimental results demonstrate the potential application of the proposed module in various flexible/soft devices or the human body.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Ganesh Shimoga, Dong-Soo Choi, Sang-Youn Kim
Summary: The innovative robotic models constructed by mechanical and material engineers inspired by nature have resulted in pioneering research contributions, particularly in the development of soft robotic structures from smart materials. The application of bio-inspiration has led to safer human-robot interaction and technological advancements in constructing portable robots for specific applications using liquid crystalline elastomers with azo-derivates.
APPLIED SCIENCES-BASEL
(2021)
Article
Instruments & Instrumentation
Tae-Hoon Kim, Hyun-Jeong Kim, Dong-Soo Choi, Yoon-Chae Nah, Sang-Youn Kim
Summary: This paper proposes a miniature electro-focus/chromic tuneable lens whose focal point and optical transmittance can be independently controlled by electric power. The lens uses plasticized poly (vinyl chloride) and electrochromic gels to change its curvature and brightness, and can return to its initial condition when electric power is removed.
SMART MATERIALS AND STRUCTURES
(2021)
Review
Materials Science, Multidisciplinary
Ganesh Shimoga, Ramasubba Reddy Palem, Dong-Soo Choi, Eun-Jae Shin, Pattan-Siddappa Ganesh, Ganesh Dattatraya Saratale, Rijuta Ganesh Saratale, Soo-Hong Lee, Sang-Youn Kim
Summary: Metallic nanostructures and metal-organic frameworks are crucial for high-performance supercapacitors, working synergistically with conducting polymers to enhance specific capacitance and cyclic stability. Polypyrrole, known as a synthetic metal, is extensively studied for its excellent properties, ease of preparation, and unique structure-property relationships, contributing to outstanding supercapacitive performances. Researchers have successfully improved the electronic conductivity of metallic nanostructures and metal-organic frameworks by incorporating conducting polymers such as polypyrrole, leading to high-performance electrode materials for supercapacitor applications.
Article
Environmental Sciences
Pattan-Siddappa Ganesh, Mani Govindasamy, Sang-Youn Kim, Dong-Soo Choi, Hyun-U. Ko, Razan Abdullah Alshgari, Chi-Hsien Huang
Summary: In this study, a simple synthesis method was designed to prepare an electrochemical sensor based on sulfur-doped graphitic carbon nitride supported transition metal carbide interface. The synthesized Mo2C/SCN nanocatalyst was characterized using X-ray diffraction and scanning electron microscopy, showing its suitability for nano-molar electrochemical sensor applications. The modified glassy carbon electrode with Mo2C/SCN exhibited simultaneous and interference-free detection of uric acid and folic acid with good detection limits.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Engineering, Mechanical
Dong-Soo Choi, In-Ho Yun, Tae-Hoon Kim, SangKyu Byeon, Sang-Youn Kim
Proceedings Paper
Automation & Control Systems
Seok-Han Lee, Dong-Soo Choi, Hye-Sun Lee, Ganesh Shimoga, Sang-Youn Kim
2019 19TH INTERNATIONAL CONFERENCE ON CONTROL, AUTOMATION AND SYSTEMS (ICCAS 2019)
(2019)
Proceedings Paper
Computer Science, Cybernetics
SiHo Ryu, Dong-Soo Choi, Sang-Youn Kim
HAPTIC INTERACTION: PERCEPTION, DEVICES AND ALGORITHMS
(2019)
Proceedings Paper
Computer Science, Cybernetics
Dong-Soo Choi, Sang-Youn Kim
HAPTIC INTERACTION: PERCEPTION, DEVICES AND ALGORITHMS
(2019)
Proceedings Paper
Optics
Dong-Soo Choi, Ganesh Shimoga, Eun-Jae Shin, Sang-Youn Kim
NANO-, BIO-, INFO-TECH SENSORS AND 3D SYSTEMS III
(2019)
Proceedings Paper
Computer Science, Cybernetics
Dong-Soo Choi, Siho Ryu, YeongSeok Do, Ki-Uk Kyung, Kyeongbok Jin, Sang-Youn Kim
2019 IEEE INTERNATIONAL CONFERENCE ON CONSUMER ELECTRONICS (ICCE)
(2019)
Article
Computer Science, Information Systems
Dong-Soo Choi, Seok-Han Lee, Sang-Youn Kim
