Relative position control and coalescence of independent microparticles using ultrasonic waves
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Relative position control and coalescence of independent microparticles using ultrasonic waves
- 发表刊物：
- Journal Of Applied Physics
- 摘要：
- Controlling the relative positions and coalescence of independent cells or microparticles is of
particular importance for studying many physical phenomena, biological research, pharmaceutical
tests, and chemical material processing. In this work, contactless maneuvering of two independent
microparticles initially lying on a rigid surface was performed at a stable levitation height within a
water-filled ultrasonic chamber. Three lead zirconate titanate transducers with 2MHz thickness resonance
frequency were obliquely mounted in a homemade device to form a sound field in a half
space. By modulating the excitation voltage of a single transducer and the subsequent combination
of amplitude and phase modulation, two separate 80 lm diameter silica beads were picked up from
the chamber bottom, approached, and then coalesced to form a cluster in different ways. Both particles
simultaneously migrated towards each other in the former process, while more dexterous
movement with single-particle migration was realized for the other process. There is good agreement
between the measured trajectories and theoretical predictions based on the theory of the firstorder
acoustic radiation force. The method introduced here also has the ability to form a cluster at
any desired location in the chamber, which is promising for macromolecule processing ranging
from the life sciences to biochemistry and clinical practice.
- 合写作者：
- Shuang Deng，Kun Jia*，Jian Chen，Deqing Mei，Keji Yang
- 是否译文：
- 否
- 发表时间：
- 2017-05-14