Article
Physics, Applied
Ronghe Li, Yifei Li, Hande Sang, Yuanyuan Liu, Shuang Chen, Su Zhao
Summary: This study investigates the influence of ambient pressure on the load capacity of near-field acoustic levitation. Theoretical models based on acoustic radiation pressure and hydrodynamic lubrication theory are developed, considering the changes in ambient pressure. Both simulation and experimental results demonstrate that the levitation force is directly proportional to the ambient pressure. The levitation force increases by 4-5 times at an ambient pressure of 0.5 MPa, and a maximum load capacity of 0.309 MPa is achieved.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Jie Huang, Qinxin Zhou, Xuemei Ren, Zheng Xu, Xiaojun Liu
Summary: Non-diffracting Bessel acoustic beams with self-healing, self-bending, and self-acceleration properties have potential applications for directional transportation of microbubbles. By adjusting the acoustic frequency, the maximum point of acoustic intensity on the beam mainlobe can be changed, and the curved trajectory and adjustable destination of microbubble transportation have been experimentally proven. The proposed method utilizes the conservative part of the radiation force to control the trajectory of microbubbles, making it suitable for in vivo applications.
APPLIED PHYSICS LETTERS
(2021)
Article
Multidisciplinary Sciences
Luke Cox, Anthony Croxford, Bruce W. Drinkwater
Summary: This study utilizes impulse control of an acoustic field to create complex particle patterns and dynamically manipulate them. Different impulse regimes lead to different particle motions, resulting in high-contrast patterns. The research shows that operating in different impulse regimes allows for localized manipulation of particles, clearing away undesired particles to enhance pattern contrast.
SCIENTIFIC REPORTS
(2022)
Article
Acoustics
Deqing Kong, Yuan Qian, Minoru Kuribayashi Kurosawa, Manabu Aoyagi
Summary: An acoustic underwater propulsion system based on a lead-zirconate-titanate ultrasonic transducer was evaluated, with measurements taken on the transducer's vibration amplitude, calculated acoustic radiation force, and performance in water. Although the system showed high efficiency in water, the overall movement efficiency of the swimmer was found to be low due to fluid resistance and wire traction. The study proposed an evaluation method for optimizing swimmers with an acoustic underwater propulsion system, suggesting potential applications in pipeline inspection and repair due to the system's small size and high power density.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2021)
Article
Chemistry, Analytical
Umar Farooq, Xiufang Liu, Wei Zhou, Muhammad Hassan, Lili Niu, Long Meng
Summary: This method utilizes the collision between nanowires and cells to induce cell lysis efficiently, with advantages of low power consumption, fast processing, reusability, and minimal sample consumption. Ni coated Ag-nanowires show promise for applications in point of care diagnostics.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Multidisciplinary Sciences
Kai Melde, Heiner Kremer, Minghui Shi, Senne Seneca, Christoph Frey, Ilia Platzman, Christian Degel, Daniel Schmitt, Bernhard Schoelkopf, Peer Fischer
Summary: Acoustic waves can generate forces on matter, allowing for the precise shaping of ultrasound fields in 3D. This technique enables the one-step assembly of particles, hydrogel beads, and biological cells using acoustic forces without the need for opposing waves or support structures. The structures can be fixed by gelation. This advancement holds great potential for tissue engineering and additive manufacturing.
Article
Acoustics
Jinping Wang, Feiyan Cai, Qin Lin, Degang Zhao, Hairong Zheng
Summary: In this study, the acoustic radiation force acting on spherical elastic shells in standing waves was theoretically investigated. It was found that the direction of the acoustic radiation force can be controlled by changing the physical properties of the shells, and the force can be significantly enhanced around resonant frequencies in the relatively low-frequency range.
Article
Engineering, Civil
Vijay Gunasekaran, Saurav Gulhane, Somya Gupta, Jeyaraj Pitchaimani, Vasudevan Rajamohan, Ganapathi Manickam
Summary: This study numerically investigates the sound radiation and transmission loss characteristics of variable stiffness composite plates reinforced with curvilinear fibers. The vibration response under steady state excitation is analyzed using a higher-order shear flexible finite element model and the Helmholtz wave equation. The study reveals that the acoustic response of the curvilinear fiber composite plate is significantly influenced by the curvilinear fiber angles.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2022)
Article
Acoustics
Carl Andersson
Summary: This article investigates the acoustic levitation of wavelength-sized spherical objects using a general-purpose ultrasonic transducer array and explores the possibility of extending the capabilities of such arrays to levitate multi-wavelength-sized objects. The driving signals for the array elements are determined through numerical optimization of a physics-based cost function, with simulations and experiments verifying the feasibility of levitating spheres up to 20 mm in diameter.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Acoustics
Carl Andersson
Summary: This article explores the possibility of using a general-purpose ultrasonic transducer array to levitate objects of various diameters. The driving signals for the array elements are determined through numerical optimization, and the simulations are verified experimentally.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Physics, Applied
Xudong Fan, Yifan Zhu, Zihao Su, Ning Li, Xiaolong Huang, Yang Kang, Can Li, Chunsheng Weng, Hui Zhang, Weiwei Kan, Badreddine Assouar
Summary: We investigate the transverse trapping force of Bessel beams on small particles both on and off the central axis. By combining simulated fields with the Gorkov force potential, we analyze the trapping behaviors of small objects and observe a reversal of trapping behaviors by varying the paraxiality parameter of the Bessel beam. Our results demonstrate the potential of using axisymmetric Bessel beams to trap particles of varying density and stiffness. We also demonstrate the use of a lossy acoustic metastructure to generate the desired sound field and trap a foam ball as an example.
PHYSICAL REVIEW APPLIED
(2023)
Article
Acoustics
Wolfgang Rueckner, Joseph Peidle, Allen Crockett, Daniel Davis
Summary: Schlieren images reveal that the particle size of solid elastic Styrofoam spheres affects their levitation positions in ultrasonic acoustic standing waves.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2023)
Article
Acoustics
Jie Huang, Xuemei Ren, Qinxin Zhou, Junhe Zhou, Zheng Xu
Summary: This paper introduces a new method that combines surface acoustic waves (SAWs) with microfluidics technology to efficiently manipulate substances on the surface of a substrate. By designing appropriate acoustic lenses, nonplanar SAWs can be generated, and directional particle transport can be achieved. This method has the potential for flexible cell manipulation in microfluidics and biomedical applications.
Article
Physics, Applied
Ning Ding, Qingyu Ma, Yuzhi Li, Gepu Guo, Juan Tu, Dong Zhang
Summary: OA-AV beams can be constructed by introducing phase delays to traditional transducer arrays for contactless manipulations, showing a linear trajectory. The axial and cross-sectional profiles of the acoustic-vortex beams can be adjusted based on the order and radial offset.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Physics, Fluids & Plasmas
Zixing Liu, Guangyao Xu, Zhengyang Ni, Xizhou Chen, Xiasheng Guo, Juan Tu, Dong Zhang
Summary: This study explores the acoustophoresis of spherical Rayleigh particles in counterpropagating SAW fields and identifies two distinct particle motion modes. Analytical expressions of particle trajectories in different fields and moving patterns are provided through theoretical studies, guiding the design of SAW acoustofluidic particle separation chips for high throughput and efficiency.