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Related Concept Videos

Electrochemical Systems01:24

Electrochemical Systems

Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution, the Zn metal, composed...
Faraday Disk Dynamo01:23

Faraday Disk Dynamo

A Faraday disk dynamo is a DC generator, producing an emf that is constant in time. It consists of a conducting disk that rotates with a constant angular velocity in the magnetic field, perpendicular to the disk's plane. The rotation of the disk causes a change in magnetic flux, which induces an emf, causing opposite charges to develop on the rim and in the center of the disk. The polarity of the induced emf can be determined by the direction of the magnetic field and the direction of the...
The Electrical Double Layer01:30

The Electrical Double Layer

In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
Electrodeposition01:08

Electrodeposition

Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrochemical Cells01:28

Electrochemical Cells

Electrochemical cells are systems that convert chemical energy into electrical energy or use electrical energy to drive chemical reactions. They consist of two electrodes in contact with an electrolyte, where redox reactions enable electron transfer. Most electrochemical cells include two half-cells connected by an external wire for electron flow and a salt bridge for ion flow. The salt bridge contains an electrolyte solution and maintains charge neutrality by allowing ions—not electrons—to...
Types of Reversible Electrodes01:24

Types of Reversible Electrodes

For electrode reversibility to be maintained, all the reactants and products involved in the half-reaction must be present at the electrode. There are several types of reversible electrodes (half-cells).In metal-metal-ion electrodes, a metal balances electrochemically with a solution of its own ions. Examples are Cu2+|Cu and Zn2+|Zn. Metals that react with the solvent, like group 1 and most group 2 metals, which react with water, and zinc, which reacts with aqueous acidic solutions, cannot be...

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Updated: May 7, 2026

Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions
08:41

Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions

Published on: September 7, 2018

Electrohydrodynamic direct-writing.

YongAn Huang1, Ningbin Bu, Yongqing Duan

  • 1State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China. yahuang@hust.edu.cn yinzhp@mail.hust.edu.cn.

Nanoscale
|September 24, 2013
PubMed
Summary
This summary is machine-generated.

Electrohydrodynamic (EHD) direct-writing enables precise, large-area printing of sub-100 nm nanofibers. This cost-effective technique offers controllable nanofabrication for advanced materials and devices.

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Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions
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Area of Science:

  • Materials Science and Engineering
  • Nanotechnology
  • Manufacturing Processes

Background:

  • The increasing demand for large-area micro/nano-manufacturing necessitates efficient and cost-effective techniques.
  • Conventional methods like electron-beam lithography are often slow, complex, and expensive.
  • Electrospinning offers potential but lacks precise control for pattern formation.

Purpose of the Study:

  • To review the research and developments in electrohydrodynamic (EHD) direct-writing for nanofabrication.
  • To highlight the capabilities and advantages of EHD direct-writing for creating high-resolution patterns.
  • To discuss the advancements in EHD print heads for improved controllability.

Main Methods:

  • Utilizing electrohydrodynamic (EHD) forces for direct-writing of nanofibers.
  • Employing solution-processable organic materials for printing.
  • Developing specialized EHD print heads for enhanced control and resolution.

Main Results:

  • Demonstration of direct-writing solid/liquid straight/serpentine nanofibers with sub-100 nm resolution.
  • Achieved direct, continuous, and controllable printing on rigid and flexible substrates.
  • Established EHD direct-writing as a high-efficiency, cost-effective alternative to traditional methods.

Conclusions:

  • EHD direct-writing is a ground-breaking technique for large-area nanofabrication.
  • The method offers non-contact, additive, reproducible processing with high resolution.
  • It provides a viable and superior alternative to conventional nanofabrication techniques for organic materials.