Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Magnetic Vector Potential

Magnetic Vector Potential

In electrostatics, the electric field can be written as the negative gradient of the potential. In magnetostatics, the zero divergence of the magnetic field ensures that the magnetic field can be expressed as the curl of a vector potential. This potential is known as the magnetic vector potential.
Consider an ideal solenoid with n turns per unit length and radius R. If I is the current through the solenoid, the magnetic field inside the solenoid is expressed as the product of vacuum...

Magnetic Damping

Magnetic Damping

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...

You might also read

Related Articles

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

Sort by

Same author

Magnetic Nanostructures Inside Cells: A Versatile Platform for Cellular Sensing, Manipulation, and Fabrication.

Small (Weinheim an der Bergstrasse, Germany)·2026

Same author

Frequency-Chirped Actuation of Chiral Magnetic Microbots for Viscosity Mapping in Heterogenous Media: From Model Fluids to Living Cells.

ACS nano·2025

Same author

A roadmap for next-generation nanomotors.

Nature nanotechnology·2025

Same author

Directed Self-Assembly of Magnetic Bioceramic Deep Inside Dentinal Tubules May Alleviate Dental Hypersensitivity.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2025

Same author

Technology Roadmap of Micro/Nanorobots.

ACS nano·2025

Same author

Stable and Highly Steerable Magnetic Nanorobots Demonstrate Therapeutical Functionality in Crowded Biological Media.

ACS nano·2025

Search research articles

Related Experiment Video

Updated: Sep 1, 2025

Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties

Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties

Published on: May 2, 2014

Mapping Viscoelastic Properties Using Helical Magnetic Nanopropellers.

Arijit Ghosh¹, Ambarish Ghosh^2,3

¹Department of Electrical Communication Engineering, Indian Institute of Science, Bangalore, India.

Transactions of the Indian National Academy of Engineering : an International Journal of Engineering and Technology

|August 15, 2022

Summary

This summary is machine-generated.

Helical nanomachines precisely measure fluid properties. Their propulsion speed reveals local elastic relaxation times in complex fluids, offering superior microrheology mapping.

Keywords:

Active microrheology Microrobots Nanoswimmers Viscoelasticity Viscosity sensor

More Related Videos

Viscoelastic Characterization of Soft Tissue-Mimicking Gelatin Phantoms using Indentation and Magnetic Resonance Elastography

Viscoelastic Characterization of Soft Tissue-Mimicking Gelatin Phantoms using Indentation and Magnetic Resonance Elastography

Published on: May 10, 2022

Scalable Nanohelices for Predictive Studies and Enhanced 3D Visualization

Scalable Nanohelices for Predictive Studies and Enhanced 3D Visualization

Published on: November 12, 2014

Related Experiment Videos

Last Updated: Sep 1, 2025

Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties

Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties

Published on: May 2, 2014

Viscoelastic Characterization of Soft Tissue-Mimicking Gelatin Phantoms using Indentation and Magnetic Resonance Elastography

Viscoelastic Characterization of Soft Tissue-Mimicking Gelatin Phantoms using Indentation and Magnetic Resonance Elastography

Published on: May 10, 2022

Scalable Nanohelices for Predictive Studies and Enhanced 3D Visualization

Scalable Nanohelices for Predictive Studies and Enhanced 3D Visualization

Published on: November 12, 2014

Area of Science:

Biophysics
Materials Science
Nanotechnology

Background:

Artificial micro/nanomachines show promise for various biomedical applications.
Accurate measurement of local rheological properties is crucial for understanding complex fluids.

Purpose of the Study:

To utilize helical nanomachines for precise local rheological measurements.
To develop a novel technique for mapping fluid viscoelasticity.

Main Methods:

Employing magnetically controlled helical nanomachines (nanopropellers).
Simultaneously measuring nanomachine position and fluid mechanical properties.
Analyzing nanomachine propulsion speed in relation to fluid elasticity.

Main Results:

Nanomachine motion demonstrated high sensitivity to fluid elasticity.
Propulsion speed accurately correlates with local elastic relaxation time.
The technique achieved superior spatial and temporal resolution compared to existing methods.

Conclusions:

Helical nanopropellers offer a powerful new tool for microrheology.
This method enables high-resolution mapping of rheological properties in complex media.
The technique surpasses current passive and active microrheology approaches.