関連する実験動画
Updated: Jan 8, 2026

11:10
Fabrication and Operation of a Nano-Optical Conveyor Belt
Published on: August 26, 2015
12.0K
ベッセルビーム重ね合わせによる音響粒子搬送
Jianrong Shi1, Xuemei Ren1, Yubo Shi1
1Institute of Acoustics, Tongji University, Shanghai 200092, China.
Ultrasonics
|December 12, 2025
まとめ
ベッセルビームを用いた音響ピンセットを開発し、精密な操作のための粒子搬送機を作成しました。この技術により、マイクロスケールの粒子の安定した捕捉、押出し、引出しが可能になり、生体内細胞操作の可能性があります。
科学分野:
- 音響物理学
- 光ピンセット
- 生物物理学
背景:
- 音響ピンセットは、非侵襲的な粒子操作を提供します。
- 高度なアプリケーションには、音響場の精密な制御が不可欠です。
- 音響ビームの重ね合わせは、捕捉のための複雑な音場を生成できます。
研究 の 目的:
- 粒子操作のための、オンアクシス、マルチボトル音響ビームを提案し、理論的に確立すること。
- 音響放射圧を用いてマイクロメートルスケールの粒子の安定した捕捉、押出し、引出しを実証すること。
- 捕捉安定性と場観測を強化するための音響ピンセットの最適化を探求すること。
主な方法:
- 音響ボトルを生成するために、2つの同軸音響ベッセルビームを重ね合わせました。
- 横波数(k_r)とソース半径に基づいて、空間音圧分布とソース位相を導出しました。
- 粒子捕捉のために、音響ボトル内の強い勾配を持つ音響放射圧を利用しました。
主要な成果:
- 自由空間におけるマイクロメートルスケールのレイリー粒子の安定した捕捉を達成しました。
- 音響周波数を調整することにより、伝搬軸に沿って複数の粒子を捕捉、押出し、引出す能力を実証しました。
- 性能向上のため、k_r値やベッセルビームの数を含む、k_rに依存する位相レンズの最適化について議論しました。
結論:
- 単一の音響ソースと位相レンズを使用した提案された音響ピンセットシステムは、精密な超音波場制御を提供します。
- この技術は、マイクロ粒子の安定した操作を可能にし、生体内細胞操作や標的医療処置に大きな可能性を秘めています。
さらに関連する動画
関連する概念動画
Method of Superposition
1.7K
The method of superposition is a crucial technique in structural engineering, used to analyze the effect of multiple loads on beams. This approach involves calculating the deflection and slope for each load on a beam separately, and then summing these effects to determine the overall impact. It is applicable only when the beam material remains within its elastic limit, ensuring that deformations are linearly elastic.
When applying the method of superposition, each type of load—whether...
When applying the method of superposition, each type of load—whether...
1.7K
Velocity and Acceleration of a Wave
4.7K
A wave propagates through a medium with a constant speed, known as a wave velocity. It is different from the speed of the particles of the medium, which is not constant. In addition, the velocity of the medium is perpendicular to the velocity of the wave. The variable speed of the particles of the medium implies that there must be acceleration associated with it.
The velocity of the particles can be obtained by taking the partial derivative of the position equation with respect to time....
The velocity of the particles can be obtained by taking the partial derivative of the position equation with respect to time....
4.7K
The de Broglie Wavelength
32.9K
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
32.9K
Principle of Linear Impulse and Momentum for a Single Particle
1.5K
Linear momentum is a fundamental concept in physics that describes the motion of an object. It is a vector quantity, having a magnitude equal to the product of its mass and its velocity, and direction along the object's velocity. On the other hand, linear impulse, also known as momentum impulse, is a concept in physics related to the change in the linear momentum of an object. Impulse is a vector quantity defined as the product of force and the time over which the force is applied.
Delving...
Delving...
1.5K
Sound Waves
12.3K
Sound waves can be thought of as fluctuations in the pressure of a medium through which they propagate. Since the pressure also makes the medium's particles vibrate along its direction of motion, the waves can be modeled as the displacement of the medium's particles from their mean position.
Sound waves are longitudinal in most fluids because fluids cannot sustain any lateral pressure. In solids, however, shear forces help in propagating the disturbance in the lateral direction as well....
Sound waves are longitudinal in most fluids because fluids cannot sustain any lateral pressure. In solids, however, shear forces help in propagating the disturbance in the lateral direction as well....
12.3K
Principle of Linear Impulse and Momentum for a Single Particle: Problem Solving
962
Consider a wooden box and a cylinder of known masses m1 and m2, respectively, hanging from a ceiling with the help of a massless pulley system.
962

