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

Force On A Current Loop In A Magnetic Field01:17

Force On A Current Loop In A Magnetic Field

3.7K
Magnetic forces on wires carrying current are most frequently applied in motors. A DC motor is a device that converts electrical energy into mechanical work. In motors, wire loops are enclosed in a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate. The direction of the current is reversed once the loop's surface area is lined up with the magnetic field, causing a constant torque on the loop. During the process, commutators...
3.7K
Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

5.6K
The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
5.6K
Magnetic Flux01:18

Magnetic Flux

4.2K
The magnetic flux measures the number of magnetic field lines passing through a given surface area. The SI unit for magnetic flux is the weber (Wb). Magnetic flux is a scalar quantity. It depends on three factors: the strength of the magnetic field B, the area through which the field lines pass, and the relative orientation of the field with the surface area.
Suppose a surface is divided into elements of area dA. For each element, the component of the magnetic field that is normal to the...
4.2K
Magnetic Force01:18

Magnetic Force

2.4K
In addition to the electric forces between electric charges, moving electric charges exert magnetic forces on each other. A magnetic field is created by a moving charge or a group of moving charges known as the electric current. A magnetic force is experienced by a second current or moving charge in response to this magnetic field. Fundamentally, interactions between moving electrons in the atoms of two bodies produce magnetic forces between them.
The magnetic force acting on a moving charge...
2.4K
Magnetic Damping01:17

Magnetic Damping

1.3K
Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
1.3K
Electro-mechanical Systems01:19

Electro-mechanical Systems

1.3K
Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
1.3K

You might also read

Related Articles

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

Sort by
Same author

The hippocampus as a small-world cognitive map.

bioRxiv : the preprint server for biology·2026
Same author

Chirality-driven all-optical image differentiation.

Nanophotonics (Berlin, Germany)·2025
Same author

How tp1, an indirect wing steering muscle, stabilizes <i>Drosophila's</i> flight.

bioRxiv : the preprint server for biology·2025
Same author

Nonlocal metasurfaces: universal modal maps governed by a nonlocal generalized Snell's law.

Nanophotonics (Berlin, Germany)·2025
Same author

The spatial complexity of optical computing: toward space-efficient design.

Nature communications·2025
Same author

Magnetic decoupling as a proofreading strategy for high-yield, time-efficient microscale self-assembly.

Proceedings of the National Academy of Sciences of the United States of America·2025
Same journal

A native sulfur deposit in Gale crater, Mars.

Science (New York, N.Y.)·2026
Same journal

Coordinated demise of harmful algal blooms.

Science (New York, N.Y.)·2026
Same journal

Genetic effects put into context.

Science (New York, N.Y.)·2026
Same journal

Bacteria share proteins to survive antibiotics.

Science (New York, N.Y.)·2026
Same journal

Impacts shaped Earth's first continents.

Science (New York, N.Y.)·2026
Same journal

Erratum for the Report "Covalently bonded single-molecule junctions with stable and reversible photoswitched conductivity" by C. Jia <i>et al</i>.

Science (New York, N.Y.)·2026
See all related articles

Related Experiment Video

Updated: May 3, 2026

Patterned Photostimulation with Digital Micromirror Devices to Investigate Dendritic Integration Across Branch Points
09:30

Patterned Photostimulation with Digital Micromirror Devices to Investigate Dendritic Integration Across Branch Points

Published on: March 2, 2011

15.7K

Magnetically programmed diffractive robotics.

Conrad L Smart1, Tanner G Pearson2, Zexi Liang1,3

  • 1Laboratory of Atomic and Solid-State Physics, Cornell University, Ithaca, NY, USA.

Science (New York, N.Y.)
|November 28, 2024
PubMed
Summary
This summary is machine-generated.

We developed novel diffractive robots, microscopic machines operating at the visible-light diffraction limit. These magnetically controlled microbots enable advanced applications like subdiffractive imaging and precise force sensing.

More Related Videos

Laser-induced Forward Transfer of Ag Nanopaste
08:07

Laser-induced Forward Transfer of Ag Nanopaste

Published on: March 31, 2016

11.3K
Four-Dimensional Printing of Stimuli-Responsive Hydrogel-Based Soft Robots
05:43

Four-Dimensional Printing of Stimuli-Responsive Hydrogel-Based Soft Robots

Published on: January 13, 2023

2.9K

Related Experiment Videos

Last Updated: May 3, 2026

Patterned Photostimulation with Digital Micromirror Devices to Investigate Dendritic Integration Across Branch Points
09:30

Patterned Photostimulation with Digital Micromirror Devices to Investigate Dendritic Integration Across Branch Points

Published on: March 2, 2011

15.7K
Laser-induced Forward Transfer of Ag Nanopaste
08:07

Laser-induced Forward Transfer of Ag Nanopaste

Published on: March 31, 2016

11.3K
Four-Dimensional Printing of Stimuli-Responsive Hydrogel-Based Soft Robots
05:43

Four-Dimensional Printing of Stimuli-Responsive Hydrogel-Based Soft Robots

Published on: January 13, 2023

2.9K

Area of Science:

  • Optics and Photonics
  • Micro-robotics
  • Nanotechnology

Background:

  • Microscopic robots offer novel methods for exploring and manipulating the microscale world.
  • Controlling light at the microscale is crucial for advanced imaging and optical applications.

Purpose of the Study:

  • To introduce a new class of magnetically controlled microscopic robots (microbots) termed diffractive robots.
  • To demonstrate the capabilities of these microbots in subdiffractive imaging, beam steering, focusing, and force sensing.

Main Methods:

  • Combining nanometer-thick mechanical membranes, programmable nanomagnets, and diffractive optical elements.
  • Developing untethered microbots capable of diffracting visible light.
  • Utilizing millitesla-scale magnetic fields for complex microbot reconfigurations.

Main Results:

  • Microbots operate at the visible-light diffraction limit.
  • Demonstrated subdiffractive imaging using structured illumination microscopy.
  • Achieved tunable diffractive optical elements for beam steering and focusing.
  • Showcased force sensing with piconewton sensitivity.

Conclusions:

  • Diffractive robots represent a significant advancement in micro-robotics and optical control.
  • These microbots have diverse applications in microscopy, optical manipulation, and sensing.
  • The technology enables new possibilities for probing and interacting with the microscopic world.