Article
Optics
Jin-Bo Xu, You-Ran Zhao, Rong-Ying Yuan, Xiao-Wei Li, Chao Liu, Qiong-Hua Wang
Summary: We propose an electrowetting liquid lens integrating adaptive liquid iris with adjustable radial aperture and axial position. The lens has the functions of depth of field expansion and field adjustment, and has great application prospects in imaging systems such as camera imaging systems.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Physics, Applied
Mo Zohrabi, Wei Yang Lim, Samuel Gilinsky, Victor M. Bright, Juliet T. Gopinath
Summary: We present a method using an array of electrowetting prisms for wavefront aberration correction. The combination of a fixed high fill factor microlens array and an adaptive electrowetting prism array with lower fill factor is utilized in correcting wavefront aberration. The design and simulation of this aberration correction mechanism are described. Our results demonstrate a significant improvement in the Strehl ratio, leading to diffraction limited performance. The compact and effective design of our approach could be implemented in various applications requiring aberration correction, including microscopy and consumer electronics.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Jinrui Zhang, Kai Zhang, Weizong Wang, Aamir Shahzad, Yufeng Cheng, Guobiao Cai
Summary: This study investigated the permeation process of ionic liquid droplets actuated by electrowetting using molecular dynamics simulation. The results showed that the wettability of the substrate and the electric field strength have significant influences on the permeation process, while varying electric field polarity results in asymmetric permeation behavior. The study also revealed the critical roles of the electric field in elongating the droplet and providing the driving force for permeation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Xiaodong He, Bo Yang, Jing Li, Xiaoping Zhang, Youquan Deng
Summary: This study investigates the dynamic behaviors of droplet electrowetting on slippery lubricant-infused porous surfaces (SLIPS). Experimental and numerical analysis reveal that the droplet always spreads smoothly to the equilibrium state without overshooting on SLIPS. The increase of applied voltage leads to overdamping of the droplet, with the settling time proportional to the 0.9th power of the electrowetting number. Additionally, it is found that the droplet spreads slowly due to the dominance of viscous dissipation of the oil-water interface with increasing silicone oil viscosity. The friction coefficient is found to be nearly proportional to the 1/6th power of oil viscosity, while being minimally influenced by applied voltage and oil thickness.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Chemistry, Physical
Xiaodong He, Jing Li, Yongxiang Guan, Zhiyang Wang
Summary: In this study, the effects of substrate characteristics and lubricant thickness on the cloaking state, wetting state, and diffusion diameter of nanodroplets were investigated through molecular dynamics simulation. The results showed that the presence of a thicker lubricant layer on silicon nanopillar substrates increased the coating film of nanodroplets, while nanodroplets on copper nanopillar substrates remained in a non-cloaking state, even with a thicker lubricant layer. Additionally, the electrowetting behaviors of nanodroplets under external electric fields were examined, and the results demonstrated a transition from Cassie state to partial Wenzel state on both substrates. Moreover, the impact of lubricant layer thickness on nanodroplet electrowetting was analyzed, revealing that the reduction of apparent contact angle increased with lubricant layer thickness under a parallel electric field, and had a maximum value for a moderate lubricant thickness under a perpendicular upward or downward electric field.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Physics, Multidisciplinary
Hongwei Jiang, Rongzhen Qian, Wenwen Chen, Rui Zhou, Guofu Zhou
Summary: This paper proposes a phase change filling model for electrowetting displays (EWD) and designs the related equipment. Compared to conventional filling models, the efficiency of the phase change filling model is significantly higher. Experimental results show that the phase change filling model can achieve a good response time and high pixel aperture ratio.
FRONTIERS IN PHYSICS
(2022)
Review
Chemistry, Analytical
Ren Shen, A'man Lv, Shuhong Yi, Ping Wang, Pui-In Mak, Rui P. Martins, Yanwei Jia
Summary: Since the identification of DNA/RNA as the genetic material, nucleic acid analysis has played a crucial role in molecular diagnostics, disease prediction, prognosis, and basic biological research. Among various platforms, electrowetting-based digital microfluidics (DMF) has emerged as a promising tool, allowing for the manipulation of individual droplets using electrical signals. This review highlights the technical principles supporting nucleic acid analysis on DMF platforms, recent advances in applications including extraction, amplification, and sequencing, as well as the commercialization status and future prospects of DMF for nucleic acid analysis.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2023)
Article
Thermodynamics
Robin Pham, Run Yan, Sheng Wang, Chung-Lung Chen
Summary: In contrast to traditional point of view, electrowetting allows for dynamic wetting regime, where hydrophilicity can penetrate or recede based on liquid location rather than substrate structure. Droplets form clusters through size regulation as condensation accumulates and are transferred by coalescence cascades and mass imbalances. This passive electrostatic liquid conveyor enables the removal of condensation from self-stagnating cycles. Each working zone functions independently for nucleation and diffusion, accumulation and collection. 40 to 50 percent of the liquid recovery increase is attributed to spatial-size regulation, while higher nucleations are influenced by electrostatic voltage. The migration of condensates is determined by the competition between dropwise and filmwise tendencies. The autonomy of nucleations allows for unhindered electrostatic voltage, limited only by material strength and endurance. © 2023 Elsevier Ltd. All rights reserved.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Mechanics
Jie Tan, Hongchen Wang, Mingyang Sun, Penghao Tian, Yutao Wang, Kun Wang, Dongyue Jiang
Summary: This study investigates the regulation of droplet impact on a hydrophobic surface based on alternating current electrowetting-on-dielectric (AC EWOD) technology. It discovered the phenomenon of partial rebound of water droplets impacting a virgin Teflon surface and studied the mechanism of influence of the AC signal on the regulation of droplet impact.
Review
Optics
Yang Cheng, Jie Cao, Qun Hao
Summary: The non-mechanical optical beam steering method using liquid-based devices has gained attention for its unique advantages such as polarization independence, wide broadband, low power consumption, and long lifetime. This review provides insights into the working principles, performance comparisons, representative applications, challenges, and future prospects of optical beam steering using liquid-based devices, aiming to attract more attention to this research field.
OPTICS AND LASERS IN ENGINEERING
(2021)
Article
Optics
Chao Liu, Yi Zheng, Fan Chu, Yi-Wei Zheng, Qiong-Hua Wang
Summary: In this paper, an adaptive micro-projection system based on liquid lens is proposed, which can work within a distance range of 150mm to 310mm. By synchronously controlling the refresh of the LCoS and the sequential lighting of the three-color light source, a 60 Hz color video display can be realized. The system has the characteristics of fast response, portability, integration and high adaptability and is expected to be used in VR, AR, on-board display, head-mounted display, etc.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Shixiao Li, Yijian Xu, Zhiyu Zhan, Pengyuan Du, Linwei Liu, Zikai Li, Huawei Wang, Pengfei Bai
Summary: This paper proposes a dynamic adaptive display model based on TFT-EWD, which combines DC and AC driving modes to achieve high-quality display of static images and dynamic videos, solving common issues of flickering and image persistence.
Article
Chemistry, Physical
Chao Wang, Xiangming Li, Yangfan Qiu, Congming Li, Guifang Liu, Gangqiang Liu, Qinwen Zheng, Xiaoliang Chen, Hongmiao Tian, Chunhui Wang, Jinyou Shao
Summary: The paper demonstrates a mechanical stimuli-controlled EWOD strategy powered by a triboelectric nanogenerator (TENG) with tunable high voltage output. It investigates the physical behaviors and underlying mechanisms of TENG-driven EWOD process and develops a self-powered electrocapillary infilling and micromolding method as an application. The strategy shows general applicability for different liquid systems and can potentially be used in wearable microfluidics, electrolyte infilling, and drug permeation systems.
Article
Chemistry, Multidisciplinary
Jian Zhang, Baiyi Chen, Xinyu Chen, Xu Hou
Summary: Liquid-based adaptive structural materials (LASMs) exhibit unprecedented properties of dynamicity, stability, adaptivity, and stimulus-responsiveness, making them suitable for various applications. The development of LASMs faces opportunities and challenges, requiring more attention and promotion from researchers.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Analytical
Yinyin Wei, Xiangyang Zhang, Aijun Zeng, Huijie Huang
Summary: This paper proposes an effective iris recognition scheme that includes iris localization and iris verification stages. The iris localization stage utilizes parallel Hough circle and Daugman algorithm while the iris verification stage employs a lightweight convolutional neural network. Experimental results demonstrate the success and accuracy of this scheme in non-cooperative environments.
Article
Optics
Chao Liu, Di Wang, Qiong-Hua Wang, Jiancheng Fang
Article
Optics
Chao Liu, Di Wang, Qiong-Hua Wang
Article
Engineering, Electrical & Electronic
Di Wang, Chao Liu, Qiong-Hua Wang
IEEE PHOTONICS JOURNAL
(2019)
Article
Multidisciplinary Sciences
Qiong-Hua Wang, Liang Xiao, Chao Liu, Lei Li
SCIENTIFIC REPORTS
(2019)
Article
Optics
Chao Liu, Di Wang, Qiong-Hua Wang
Article
Chemistry, Analytical
Shi-Long Li, Zhong-Quan Nie, Yan-Ting Tian, Chao Liu
Article
Optics
Chao Liu, Di Wang, Guang-Xu Wang, Zhao Jiang, Qiong-Hua Wang
Article
Optics
Chao Liu, Di Wang, Qiong-Hua Wang, Yan Xing
Article
Optics
Zhao Jiang, Di Wang, Yi Zheng, Chao Liu, Qiong-Hua Wang
Summary: A continuous optical zoom microscopy imaging system based on liquid lenses is proposed in this paper. The system can continuously change the magnification of the targets in real-time, offering advantages over traditional microscopes with discrete magnification.
Article
Optics
Di Wang, Jin-Bo Xu, Rong-Ying Yuan, You-Ran Zhao, Chao Liu, Qiong-Hua Wang
Summary: This paper presents a high stability liquid lens with optical path modulation function, which has a structure with three annular anchoring layers to provide six anchored precision optical path modulation gears. The feasibility of this structure is verified by simulation and practice, and the liquid lens can achieve zoom imaging and optical path modulation.
Article
Crystallography
Fan Chu, Di Wang, Chao Liu, Lei Li, Qiong-Hua Wang
Summary: A multi-view 2D/3D switchable display utilizing a cylindrical liquid crystal lens array is proposed, featuring low operating voltage and fast response time. The display can switch between 2D and 3D modes, providing wider viewing angles and a thinner design compared to other similar devices.
Article
Optics
Yi Zheng, Di Wang, Zhao Jiang, Chao Liu, Qiong-Hua Wang
Summary: The paper proposes a continuous zoom compound eye imaging system based on liquid lenses, which can achieve continuous zoom imaging and continuous focusing at different working distances by adjusting the liquid injection volume. The system increases adjustability and matches the variable image surfaces of the liquid compound eye to a planar image sensor, making it suitable for various imaging scenarios.
Article
Optics
Rong-Ying Yuan, Xiao-Li Ma, Fan Chu, Guang-Xu Wang, Min-Yang He, Chao Liu, Qiong-Hua Wang
Summary: This paper proposes an optofluidic lenticular lens array (OLLA) for a switchable 2D/3D display. By filling different mediums, it can achieve 2D and 3D displays respectively, and experiments confirm high-resolution display on smartphones.
Article
Optics
Chao Liu, Yi Zheng, Nan-Nan Li, Ye-Hao Hou, Zhao Jiang, Qiong-Hua Wang
Summary: In this paper, a real scene acquisition and holographic near-eye display system based on a zoom industrial endoscope is proposed. By adjusting the driving current of the liquid lens, the working distance and focal length of the zoom industrial endoscope can be controlled, allowing the capture of objects at different depths. The experimental results demonstrate the intuitive display of depth relationships among real objects using this system.
Article
Materials Science, Multidisciplinary
Jinbo Xu, Youran Zhao, Chao Liu, Qionghua Wang
Summary: This paper proposes a large-aperture spherical electrowetting liquid lens based on non-aqueous organic solution, which has a wide tunable focal length range and excellent image quality.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
