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

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...
Electric Generator: Alternator01:25

Electric Generator: Alternator

Electric generators induce an emf by rotating a coil in a magnetic field. A simple alternator is an AC generator that creates electrical energy that varies sinusoidally with time. A simple alternator consists of a conducting loop that is placed inside a uniform magnetic field. The loop is connected to split rings connected to the external circuit with the help of brushes.
The magnetic flux passing through the coil varies sinusoidally as the loop rotates inside the magnetic field. This...
DC Battery01:21

DC Battery

A conductor needs to be a component of a path that creates a closed loop or full circuit to have a continuous current flowing through it. A current starts to flow if an electric field is created inside an isolated conductor that is not part of a full circuit. The conductor quickly develops a net positive charge at one end and a net negative charge at the other. These charges generate an electric field opposite the direction of the applied electric field, which reduces the current. Eventually,...
DC Generator01:19

DC Generator

An alternator converts mechanical energy into electrical energy that varies sinusoidally, resulting in AC current. Meanwhile, a DC generator converts mechanical energy into electrical energy, which are DC pulses with the same polarity. The construction of a DC generator is similar to that of an alternator, except that the pair of slip rings is replaced by a single split ring, also called a commutator. The commutator functions like a periodic rotary switch; it changes the contacts with the...
Generation of Three-Phase Voltage01:21

Generation of Three-Phase Voltage

A three-phase AC generator has a rotor with a rotating magnet placed within the stator mounted with the stationary three-phase winding to generate three-phase voltages via mutual induction. These windings are evenly distributed around the inner circumference of the stator and are arranged 120 electrical degrees apart. Three-phase stator windings consist of three separate coils or groups of coils, known as phases, each connected in Y (star) configuration or Delta configuration.
As the rotor...
Three-Phase Short Circuit—Unloaded Synchronous Machine01:21

Three-Phase Short Circuit—Unloaded Synchronous Machine

Conducting a three-phase short circuit test on an unloaded synchronous machine helps understand its impact on the system. The AC fault current's oscillogram, with the DC offset removed, reveals that the waveform amplitude decreases from an initially high value to a steady-state level for one phase of the machine.
This behavior occurs due to the magnetic flux produced by the short-circuit armature currents. Initially, these currents follow high-reluctance paths but eventually shift to...

You might also read

Related Articles

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

Sort by
Same author

Cybernetic avatars: Teleoperation technologies from in-body monitoring to social interaction.

Science robotics·2024
Same author

Spatiotemporally controlled microvortices provide advanced microfluidic components.

Proceedings of the National Academy of Sciences of the United States of America·2024
Same author

Integration of Microfluidic Chip and Probe with a Dual Pump System for Measurement of Single Cells Transient Response.

Micromachines·2023
Same author

Bionic eye system mimicking microfluidic structure and intraocular pressure for glaucoma surgery training.

PloS one·2022
Same author

Microfluidic Bioreactor Made of Cyclo-Olefin Polymer for Observing On-Chip Platelet Production.

Micromachines·2021
Same author

Breakthrough in purification of fossil pollen for dating of sediments by a new large-particle on-chip sorter.

Science advances·2021

Related Experiment Video

Updated: Jun 17, 2026

Microfluidic Chips Controlled with Elastomeric Microvalve Arrays
18:11

Microfluidic Chips Controlled with Elastomeric Microvalve Arrays

Published on: October 1, 2007

21.2K

Film-Shaped Self-Powered Electro-Osmotic Micropump Array.

Toshiro Yamanaka1, Fumihito Arai1

  • 1Department of Mechanical Engineering, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan.

Micromachines
|July 8, 2023
PubMed
Summary

Researchers developed a novel film-shaped micropump array for biomedical perfusion. This wireless, stamp-like device uses a biofuel cell to generate electro-osmotic flows for precise fluid delivery in confined spaces.

Keywords:
biofuel cellelectro-osmotic flowglucosemicropump arrayperfusion

More Related Videos

Microscale Vortex-assisted Electroporator for Sequential Molecular Delivery
10:51

Microscale Vortex-assisted Electroporator for Sequential Molecular Delivery

Published on: August 7, 2014

8.6K
A Performance-testing Platform for a Conduction Micropump with an FR-4 Copper-clad Electrode Plate
06:46

A Performance-testing Platform for a Conduction Micropump with an FR-4 Copper-clad Electrode Plate

Published on: October 9, 2017

6.0K

Related Experiment Videos

Last Updated: Jun 17, 2026

Microfluidic Chips Controlled with Elastomeric Microvalve Arrays
18:11

Microfluidic Chips Controlled with Elastomeric Microvalve Arrays

Published on: October 1, 2007

21.2K
Microscale Vortex-assisted Electroporator for Sequential Molecular Delivery
10:51

Microscale Vortex-assisted Electroporator for Sequential Molecular Delivery

Published on: August 7, 2014

8.6K
A Performance-testing Platform for a Conduction Micropump with an FR-4 Copper-clad Electrode Plate
06:46

A Performance-testing Platform for a Conduction Micropump with an FR-4 Copper-clad Electrode Plate

Published on: October 9, 2017

6.0K

Area of Science:

  • Biomedical Engineering
  • Microfluidics
  • Biofuel Cells

Background:

  • Perfusion of biological fluids in small, localized areas is challenging with existing technologies.
  • Conventional methods often require multiple separate components, increasing complexity and limiting application sites.

Purpose of the Study:

  • To introduce a novel film-shaped micropump array for efficient biomedical perfusion.
  • To detail the design, fabrication, and performance of this innovative perfusion system.

Main Methods:

  • A planar biofuel cell (BFC) generates an open circuit potential (OCP).
  • The OCP drives electro-osmotic flows (EOFs) through multiple through-holes.
  • Prototypes were fabricated and performance was evaluated for fluidic delivery.

Main Results:

  • The developed micropump array is thin, wireless, and can be cut to size.
  • It functions effectively as a planar micropump in solutions containing glucose and oxygen biofuels.
  • Demonstrated feasibility for localized perfusion applications.

Conclusions:

  • The film-shaped micropump array offers a simplified and versatile solution for biomedical perfusion.
  • Its unique design facilitates easy integration into small or confined biological environments.
  • Potential applications include perfusion near or within cultured cells, tissues, and living organisms.