Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Controlled-Potential Coulometry: Electrolytic Methods01:17

Controlled-Potential Coulometry: Electrolytic Methods

855
Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential...
855
Electrochemical Systems01:24

Electrochemical Systems

130
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,...
130
Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

2.3K
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
2.3K
Processes at Electrodes01:30

Processes at Electrodes

82
The electrode interacts with ions in the electrolyte solution at its interface. The rate of oxidation and reduction depends on the speed at which electrons can transfer through this interface. As ions attach to or leave the electrode surface, the electrode acquires a charge, and an electrical potential forms across the interface, making the process more difficult to reach equilibrium. The charge on the electrode affects the local ion concentrations in the solution, though thermal motion...
82

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Utilizing metabolomics and network analysis to explore the effects of artificial production methods on the chemical composition and activity of agarwood.

Frontiers in pharmacology·2024
Same author

A large-scale, multicenter characterization of BRAF G469V/A-mutant non-small cell lung cancer.

Cancer medicine·2024
Same author

Research progress on polybenzoxazine aerogels: Preparation, properties, composites and hybrids fabrication, applications.

Advances in colloid and interface science·2024
Same author

Black Phosphorus Nanosheets Protect Neurons by Degrading Aggregative α-syn and Clearing ROS in Parkinson's Disease.

Advanced materials (Deerfield Beach, Fla.)·2024
Same author

The latest emerging drugs for the treatment of diabetic cardiomyopathy.

Expert opinion on pharmacotherapy·2024
Same author

Impaired meningeal lymphatic drainage in <i>Listeria monocytogenes</i> infection.

Frontiers in immunology·2024

Related Experiment Video

Updated: Apr 7, 2026

Electrowetting-based Digital Microfluidics Platform for Automated Enzyme-linked Immunosorbent Assay
08:22

Electrowetting-based Digital Microfluidics Platform for Automated Enzyme-linked Immunosorbent Assay

Published on: February 23, 2020

10.4K

Cheerios Effect Controlled by Electrowetting.

Junqi Yuan1, Jian Feng1, Sung Kwon Cho1

  • 1University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States.

Langmuir : the ACS Journal of Surfaces and Colloids
|July 7, 2015
PubMed
Summary
This summary is machine-generated.

Electrowetting on dielectric (EWOD) actively controls the Cheerios effect, switching capillary forces between attraction and repulsion for floating objects. This technology enables precise manipulation of microscale objects for various applications.

More Related Videos

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
10:33

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

Published on: February 27, 2019

9.1K
The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
10:03

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids

Published on: September 30, 2014

27.3K

Related Experiment Videos

Last Updated: Apr 7, 2026

Electrowetting-based Digital Microfluidics Platform for Automated Enzyme-linked Immunosorbent Assay
08:22

Electrowetting-based Digital Microfluidics Platform for Automated Enzyme-linked Immunosorbent Assay

Published on: February 23, 2020

10.4K
An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
10:33

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

Published on: February 27, 2019

9.1K
The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
10:03

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids

Published on: September 30, 2014

27.3K

Area of Science:

  • Physics
  • Materials Science
  • Microfluidics

Background:

  • The Cheerios effect describes capillary interactions causing attraction or repulsion between floating objects and surfaces.
  • This phenomenon is influenced by object density and surface wettability, specifically slope angles.

Purpose of the Study:

  • To actively control the Cheerios effect using electrowetting on dielectric (EWOD).
  • To demonstrate precise manipulation of floating objects via tunable capillary forces.

Main Methods:

  • Implementation of EWOD to dynamically alter surface wettability.
  • Experimental verification of theoretical capillary force predictions by observing particle motion.
  • Utilizing EWOD electrode arrays for controlled object movement and rotation.

Main Results:

  • Capillary forces were successfully switched between attraction and repulsion using electrical input.
  • Continuous change in contact angle via EWOD allowed for precise verification of capillary force theories.
  • Demonstrated continuous linear motion and rotation of floating objects at centimeter and millimeter scales.

Conclusions:

  • EWOD provides an effective method for active control of the Cheerios effect.
  • This technique allows for dynamic manipulation of microscale objects, opening possibilities for advanced microfluidic devices.