Article
Chemistry, Analytical
Hyeonseok Song, Daegeun Kim, Sangkug Chung
Summary: This paper presents a miniature robot that can monitor surroundings and explore small and complex environments by skating on the surface of water. The robot is primarily made of extruded polystyrene insulation (XPS) and Teflon tubes and is propelled by microstreaming flows caused by gaseous bubbles trapped in the Teflon tubes. The robot's motion and velocity were tested and measured at different frequencies and voltages, with results showing that the propulsion velocity is proportional to the applied voltage but highly dependent on the applied frequency. The robot's maneuvering capability was demonstrated by selectively exciting bubbles with different resonant frequencies, allowing for linear propulsion, rotation, and 2D navigation on the water surface.
Article
Mechanics
M. Fauconnier, C. Mauger, J-C Bera, C. Inserra
Summary: This experimental study investigates the generation of acoustic microstreaming induced by different shape modes, finding that different shape modes result in distinct flow patterns.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Chemistry, Multidisciplinary
Daegeun Kim, Jiwoo Hong, Sang Kug Chung
Summary: This article proposes a new cleaning strategy for particle contamination on semiconductor wafer surfaces using the jet flow created by bubble oscillation. The authors designed and constructed a wafer cleaning apparatus based on this strategy and achieved a high cleaning efficiency.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Mechanics
Alexander A. Doinikov, Gabriel Regnault, Cyril Mauger, Philippe Blanc-Benon, Claude Inserra
Summary: An analytical theory is developed to describe acoustic microstreaming produced by interactions between two bubbles, involving complex oscillation modes and velocity fields. The theory shows strong applicability in calculating the interactions between bubbles and their effects on the velocity field.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Thermodynamics
Tao Peng, Xiaodong Lin, Shuai Yuan, Mingyong Zhou, Bingyan Jiang, Yanwei Jia
Summary: This study demonstrated enhanced liquid mixing using ultrasonically activated attached bubbles in a microchannel. The bubbles were trapped in a hydrophobic surface microchannel and showed good stability. The results showed that reducing flow rate or increasing voltage improved mixing efficiency. The proposed chip allows for diverse mixing processes.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Environmental
Shanshan Long, Xiaogang Yang, Jie Yang, Bin Li, Weibin Shi, Martin Sommerfeld
Summary: The study demonstrates that the turbulent dispersion force model can effectively indicate the influence of turbulent eddies on bubble dynamics, leading to improvements in the prediction of bubble lateral dispersion behavior. The use of spatial filtering to model sub-grid scale bubble dispersion is proposed.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
H. Wang, P. R. Brito-Parada
Summary: This study provides a detailed investigation on microparticle-laden bubbles rising in water from nozzles, revealing that microparticles reduce the apparent surface tension of the bubble interface and influence its shape deformation and oscillations. High-speed photography allowed the systematic study of two regimes for the first time, showing that microparticles increase the damping rate of the dominant harmonic during shape oscillations.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Nuclear Science & Technology
Binbin Qiu, Qingchuan Yang, Weixiong Chen, Jiping Liu, Junjie Yan
Summary: This work experimentally and theoretically studies the pressure oscillation and condensation behavior of steam bubbles at low steam mass flux. It reveals that the steam bubble condenses first, then expands and contracts, and establishes a theoretical model of heat and mass transfer in the bubble condensation process.
PROGRESS IN NUCLEAR ENERGY
(2021)
Article
Energy & Fuels
Kewen Peng, Shouceng Tian, Yiqun Zhang, Wanjun Qu, Qianxi Wang
Summary: This study examines the behavior of radicals in the scavenging process and quantifies the scavenging efficiency of terephthalate in the high-power ultrasound oxidation process. It is found that the small mass diffusivity of terephthalate limits its scavenging efficiency, resulting in a maximum radical trapping efficiency below 30%.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Article
Nuclear Science & Technology
Yuchen Song, Rui Xu, Kangbei Cai, Junlian Yin, Dezhong Wang
Summary: This study investigated the critical breakup condition of bubbles generated by a venturi bubble generator in the online fission gas removal system applied to TMSR, and explored the bubble dynamics in unsteady turbulent flow through numerical simulations. The dynamic characteristics of bubble shape factor can be modeled by a one-dimensional damped oscillator model, and bubble oscillation in unsteady turbulence can be predicted using a combination of dimensionless time and Weber number.
ANNALS OF NUCLEAR ENERGY
(2021)
Article
Acoustics
Xianmei Zhang, Fan Li, Chenghui Wang, Jianzhong Guo, Runyang Mo, Jing Hu, Shi Chen, Jiaxin He, Honghan Liu
Summary: This study simplified the growth process of a gas nucleus in a micro-cavity and considered the full confinement effect of the surrounding medium. The numerical results showed that the initial position of the gas nucleus, cavity size, and properties of the surrounding medium have significant impacts on the nucleation time, radial oscillation, and translational motion of the cavitation bubble.
ULTRASONICS SONOCHEMISTRY
(2022)
Article
Acoustics
Xiaoyu Wang, Xuan Du, Dan Gao, Yuning Zhang, Ting Chen
Summary: In this paper, the resonance characteristics of a vapor bubble oscillating in an acoustic field are investigated analytically. The analytical solution of the non-dimensional perturbation of the bubble radius during the initial oscillation stage is obtained and analyzed based on the Laplace transform method. The oscillation behaviors at resonance and non-resonance situations are thoroughly exhibited and analyzed in the time and frequency domains. Several important conclusions are drawn from the investigation, including the significant influence of the acoustic field on the bubble oscillation and the differences in oscillation characteristics between resonance and non-resonance situations.
ULTRASONICS SONOCHEMISTRY
(2023)
Article
Engineering, Environmental
Peipei Wang, Pablo R. Brito-Parada
Summary: Experimental research on the dynamics of bubble collision with air-liquid interfaces reveals that particle coverage affects the approach velocity of bubbles. Particle motion and bubble shape pulsation contribute to the dissipation of kinetic energy in approaching bubbles, and a damped oscillation model is proposed to describe the interaction between bubbles and interfaces.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Acoustics
Guokui Li, Yu Zhao, Jiaqi Li, Yong Xiao
Summary: A numerical model of cavitation bubble in a narrow-gap pure Sn liquid medium was established by simulation, and the effects of pressure amplitude and gap size on the bubble's shape, size, and position were investigated. The results showed that the bubble could exist stably and move directionally on the metal substrate surface, with increased motion rate and elliptical shape as the pressure amplitude increased or the gap size decreased. The mechanism of ultrasonic degassing in the soldering seam was also analyzed.
ULTRASONICS SONOCHEMISTRY
(2023)
Article
Chemistry, Physical
Ross A. Arnold, Shiqi Dong, Longwen Tang, Dale Prentice, Marie Collin, Juan Carlos Vega-Vila, Amaya Hernandez, Erika Callagon La Plante, Kirk Ellison, Aditya Kumar, Samanvaya Srivastava, Mathieu Bauchy, Dante Simonetti, Gaurav N. Sant
Summary: Acoustic stimulation can be used to extract valuable elements from minerals and industrial waste materials. Both ultrasonic and megasonic frequencies can enhance dissolution, but their effects vary depending on the type of material.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Review
Engineering, Electrical & Electronic
Deasung Jang, Jinwon Jeong, Hyeonseok Song, Sang Kug Chung
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2019)
Article
Instruments & Instrumentation
Deasung Jang, Jeongmin Lee, Hyeonseok Song, Heebum Park, Jiwoo Hong, Sang Kug Chung
REVIEW OF SCIENTIFIC INSTRUMENTS
(2019)
Article
Engineering, Electrical & Electronic
Jinwon Jeong, Deasung Jang, Daegeun Kim, Daeyoung Lee, Sang Kug Chung
SENSORS AND ACTUATORS A-PHYSICAL
(2020)
Article
Instruments & Instrumentation
Jeongmin Lee, Yuna Park, Deasung Jang, Sang Kug Chung
Summary: This paper introduces a new type of switchable liquid shutter for mobile electronic devices, which can be opened and closed by applying electrical voltage to patterned electrodes, providing a simple design and fast switching operation.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Engineering, Electrical & Electronic
Kehao Feng, Zhenghua Zhang, Guohua Bai, Xiuyuan Fan, Rongzhi Zhao, Xuefeng Zhang
Summary: This paper proposes a new method to accurately evaluate the high-frequency power loss of soft magnetic materials. Through a two-step calibration, the system is able to compensate for the phase angle discrepancy between the exciting current and induced voltage, enabling a higher power loss measurement frequency.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Mingfang Kang, Tong Liu, Hongmei Sun, Lin Li, Keliang Wang
Summary: In this study, the absorption performance of ambient nitrogenous toxic gases on a monolayer of blue phosphorus phase germanium selenide (GeSe) was investigated using density-functional theory calculations. The results showed that GeSe monolayer exhibits higher sensitivity and selectivity for the hazardous gas NO.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Yaqiong Niu, Zhicheng Zou, Longsheng Cheng, Chaofeng Ye
Summary: This paper proposes a novel method to stabilize the laser diode output using a close-loop control with two feedbacks. The proposed method performs better for long-time operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jiajie Li, Ying Liu, Zhen Chai, Qian Cao, Renjie Li, Yueyang Zhai
Summary: This study proposed an efficient and high-quality beam-splitting method based on a diffractive optical element, enabling multichannel SERF atomic magnetometers to achieve ultra-high consistency and sensitivity. It has significant applications in array biomagnetic measurement systems.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
E. Oliveira, C. Doering, H. Fouckhardt
Summary: With the development of Lab on a chip technology, fluid management using dispersed droplets has become an important approach. Electrowetting on dielectric (EWOD) is one method for droplet actuation, but it requires prior definition of droplet positions. Optoelectrowetting (OEW) goes further by allowing changes in electrical parameters through impinging light spots, without the need for predefined droplet positions. This study re-evaluates the key parameters of OEW and explores their effects on droplet actuation using numerical optimization methods.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Haipeng Wang, Zhiguo Wang, Gancheng Zhu, Shuai Zhang
Summary: A novel capacitive proximity skin was developed to improve the performance of robotics in handling liquid-filled containers. This skin features a flexible structure that can adapt to different grippers and seamlessly integrate with Robot Operating System. Experimental results demonstrated that this proximity skin achieved data-lossless detection and contactless measurement of liquid level, making it suitable for grasping operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Tsenguun Byambadorj, Xiangyu Zhao, Yutao Qin, Yogesh B. Gianchandani
Summary: In this research, a monolithically microfabricated Knudsen pump (KP) without suspended membranes was presented. These pumps offer improved mechanical robustness, wider process window, and simplified microfabrication process compared to previous designs. The experimental results matched the modeling results well, indicating the potential for monolithic integration onto complex lab-on-a-chip systems.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Hamed Karami, Saeed Karami Chemeh, Vahid Azizi, Hooman Sharifnasab, Jose Ramos, Mohammed Kamruzzaman
Summary: Aroma is a significant quality trait for pharmaceutical plants and their products, indicating the quality of the raw material. An electronic nose is an efficient approach for identifying and evaluating the aroma of essential oils. In this study, tarragon was dried at different temperatures and air velocities, and the purity of tarragon essential oil was evaluated using an electronic nose. Multivariate data analysis and artificial neural networks modeling were employed to quantify and classify the obtained essential oils.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Xiaoyang Duan, Dan Xu, Wenjun Jia, Ran Li, Bohao Sun, Ruitian Yan, Wenjie Zhao
Summary: Flower-like WO3/WS2 heterojunction materials constructed via a low-temperature in-situ oxidation method exhibit significant improvements in the detection of NO2 gas in gas sensors, along with good selectivity and reproducibility.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Peng Yu, Mengyang Zhang, Manqi You, Yuxi Gao, Landong Xiao, Yan Peng, Jingxia Lai, Zhouzhao Shi, Siwei Luo, Gencai Guo, Gang Guo
Summary: Recent studies have shown that two-dimensional Janus transition metal dichalcogenides (TMDs) have great potential for applications in gas sensors. By conducting first principles calculations, this study explores the potential application of Pd-doped monolayer HfSeS as gas sensor materials for detecting CO, CO2, NH3, and NO. The results demonstrate the good thermodynamical stability and reversible adsorption of these molecules on both pristine and Pd-doped HfSeS, with Pd-doped HfSeS showing higher sensitivity towards NO due to its metallic behavior upon NO adsorption.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jinlan Yang, Linjiao Li, Jun Huang, Quan Zhang, Hiba Affane
Summary: This study proposes a method for large-scale aggregation of micro-particles by creating a vortex region using low-frequency oscillation. Experimental results show that this method can achieve a large aggregation area and has the advantages of low cost and low power consumption.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jitendra Singh, Saurabh Kumar Gupta, Vinita
Summary: In this investigation, a Surface Acoustic Wave (SAW) formalin gas sensor was explored for low-level formalin gas sensing applications. The sensor showed stable response and high sensitivity to formalin gas concentration, making it a reliable and useful sensor for room temperature operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Junyao Wang, Yahao Liu, Huan Liu, Qi Hou, Jianxin Xu, Hongxu Pan, Jingran Quan, Yansong Chen, Hanbo Yang, Lixiang Li
Summary: A flexible electrode with a serpentine-shaped tetra-chiral structure was designed to improve the mechanical properties and prevent mechanical fracture of flexible electrodes. The research demonstrated that this structure reduced the maximum tensile stress by 87.19% compared to the existing tetra-chiral structure. The flexible electrode remained conductive even at a strain of 70% and showed resistance values of 5 ohm and 4.4 ohm at a bending angle of 180 degrees and after 1000 fold cycles. Furthermore, the flexible electrodes showed great potential in biological signal monitoring, particularly in collecting ECG and pulse signals.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Taihao Chen, Yong Fang, Mengru Zhu, Zhiwei Zhao, Wei Lei, Zhuoya Zhu, Helong Jiang
Summary: Flexible dual-spectral carbon nanodots/flexible n-silicon heterojunction photodetectors with high responsivity and detectivity are reported. These detectors show photo response in UV illumination and only in forward bias under visible illumination. The photocurrent of the device remains high even under bending strain.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
M. S. Sikandar Bathusha, Israr Ud Din, Rehan Umer, Kamran A. Khan
Summary: Graphene-based nanomaterials are used as embedded sensors to monitor fracture behavior in composite structures. This study investigates the in-situ crack propagation and fracture behavior in a glass fiber reinforced polymer composite using embedded reduced graphene oxide coated fabrics and highly conductive graphene nanoplatelet paper.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)