重构可编码的层次调整器,用于多功能3D液体操纵
1Department of Mechanical Engineering, The University of Hong Kong, Pokfulam, Hong Kong, 999077, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|July 29, 2024
概括
这项研究引入了一种新的3D液体操纵方法,使用磁场和微. 它可以精确控制小型液体体积,用于工程和生物化学中的各种应用.
科学领域:
- 表面科学是一门科学.
- 微流体学 微流体学
- 材料科学是一种材料科学.
背景情况:
- 液体操纵至关重要,但目前的方法是复杂的或不灵活的.
- 现有技术往往需要大量的能量投入或固定的表面特性.
研究的目的:
- 开发一种简单,可调节的3D液体操纵范式.
- 通过将界面能量与可编程磁场集成来控制液体行为.
主要方法:
- 使用了带有磁化的微型连接器的等级整流器.
- 结合液体-空气-固体界面能量与可编程磁场.
- 利用拉普拉斯压力不对称性用于定向液体转向.
主要成果:
- 证明了液体 (23-72 mN m-1) 的多式方向转向.
- 展示了从100103μL起的体积的尺度依赖的微效应.
- 在惯性主导模式下实现了乙醇临界韦伯数的2000倍增加.
结论:
- 该范式提供了对液体运输和3D操纵的多功能控制.
- 可扩展的设计可用于便携式测试,微流体学和自动反应.
- 该技术为先进的液体处理提供了一个新的平台.
相关概念视频
01:30Three-Dimensional Force System
In mechanical engineering, a three-dimensional force system is a system of forces acting in three dimensions, with forces applied along the x, y, and z coordinate axes. The three-dimensional force system is an important concept in mechanical engineering, as it allows engineers to understand and analyze the behavior of objects and structures in three dimensions. By understanding the forces acting on a system, engineers can design more efficient and effective mechanical systems that can withstand...
01:24One-Degree-of-Freedom System
In mechanical engineering, one-degree-of-freedom systems form the basis of a wide range of electrical and mechanical components. Using these models, engineers can predict the behavior of various parts in a larger system, which gives them insight into how different forces interact with each other.
A one-degree-of-freedom system is defined by an independent variable that determines its state and behavior. One example of a one-degree-of-freedom system is a simple harmonic oscillator, such as a...
A one-degree-of-freedom system is defined by an independent variable that determines its state and behavior. One example of a one-degree-of-freedom system is a simple harmonic oscillator, such as a...
01:17Accelerating Fluids
When a fluid is in constant acceleration, the pressure and buoyant force equations are modified. Suppose a beaker is placed in an elevator accelerating upward with a constant acceleration, a. In the beaker, assume there is a thin cylinder of height h with an infinitesimal cross-sectional area, ΔS.
The motion of the liquid within this infinitesimal cylinder is considered to obtain the pressure difference. Three vertical forces act on this liquid:
The motion of the liquid within this infinitesimal cylinder is considered to obtain the pressure difference. Three vertical forces act on this liquid:
01:20Design Example: Capacitance Multiplier Circuit
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
01:22Upsampling
Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
01:19Body Water Content and Fluid Compartments
Life's biochemical processes occur within aqueous solutions. Solutes are substances that are dissolved within these solutions. The human body contains a variety of solutes, which can differ across various body parts. These can encompass proteins—such as those responsible for clotting and carbohydrate transport—as well as electrolytes. In medicine, an electrolyte is often described as a mineral ion derived from a salt possessing an electric charge. Examples include sodium ions (Na+) and chloride...