相关实验视频
Updated: Jan 20, 2026

10:55
Digital Microfluidics for Automated Proteomic Processing
Published on: November 6, 2009
13.0K
对于数字微流体的离子表面活性剂介导的电雾化
Jia Li1, Noel S Ha2,3, Tingyi 'Leo' Liu1,4,5
1Mechanical and Aerospace Engineering Department, University of California, Los Angeles (UCLA), Los Angeles, CA, USA.
Nature
|August 23, 2019
概括
这项研究介绍了电湿,这是一种用于数字微流体的新方法,它使用低电压来移动液滴,使它们从表面上脱水,与传统的电湿不同. 这提供了一个更简单,更可靠的微流体平台.
科学领域:
- 微流体学 微流体学
- 表面科学是一门学科.
- 材料科学 材料科学 材料科学
背景情况:
- 数字微流体学可通过电信号进行滴滴操纵,用于各种应用.
- 电对电流 (EWOD) 是主要的执行方法,需要高电压 (约. 100 V) 和专门的涂料.
- EWOD面临着可靠性问题,如介电性故障,电充和生物污染.
研究的目的:
- 用电信号演示一种新的滴滴操纵机制.
- 为了实现滴水控制而不依赖于电流电解电 (EWOD).
- 建立一个更简单,更可靠的微流体平台.
主要方法:
- 开发了一种使用无额外层的水友导电基质的电湿机制.
- 使用电信号来诱导液体潮湿,与电潮湿形成鲜明对比.
- 研究了离子表面活性剂与基质的场所诱导的附着和分离.
主要成果:
- 通过在空气中的化晶片上使用电湿处理成功演示了滴滴操纵.
- 实现了所有基本的数字微流体操作,使用低驱动电压 (±2.5V) 和最小电流 (微安培).
- 展示了该系统处理水,常见缓冲器和有机溶剂的能力,其离子表面活性剂度低.
结论:
- 电湿是一种从根本上不同的,可能更强大的电气滴滴操纵方法.
- 低电压和简单的设置承诺一个多功能和可靠的微流体平台.
- 这种方法可以显著推进诊断,光学和电子领域的应用.
相关概念视频
Ionic Radii
33.3K
Ionic radius is the measure used to describe the size of an ion. A cation always has fewer electrons and the same number of protons as the parent atom; it is smaller than the atom from which it is derived. For example, the covalent radius of an aluminum atom (1s22s22p63s23p1) is 118 pm, whereas the ionic radius of an Al3+ (1s22s22p6) is 68 pm. As electrons are removed from the outer valence shell, the remaining core electrons occupying smaller shells experience a greater effective nuclear...
33.3K
Ionic Bonds
129.1K
Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
129.1K
Molecular and Ionic Solids
19.9K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
19.9K
Solubility of Ionic Compounds
68.0K
Solubility is the measure of the maximum amount of solute that can be dissolved in a given quantity of solvent at a given temperature and pressure. Solubility is usually measured in molarity (M) or moles per liter (mol/L). A compound is termed soluble if it dissolves in water.
68.0K
Ionic Crystal Structures
16.9K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
16.9K
Ionic Compounds: Formulas and Nomenclature
86.1K
An element composed of atoms that readily lose electrons (a metal) can react with an element composed of atoms that readily gain electrons (a nonmetal) to produce ions through complete electron transfer. The compound formed by this transfer is stabilized by the electrostatic attractions (ionic bonds) between the oppositely charged ions.
86.1K

