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

Atomic Nuclei: Larmor Precession Frequency

Atomic Nuclei: Larmor Precession Frequency

The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession,...

Galvanometer

Galvanometer

Common devices, including car instrument panels, battery chargers, and inexpensive electrical instruments, measure potential difference (voltage), current, or resistance using a d'Arsonval galvanometer. This electromechanical instrument is also known as a moving coil galvanometer.
The galvanometer consists of two concave-shaped permanent magnets, providing a uniform radial magnetic field in the annular region. In the center, a pivoted coil of fine copper wire is placed in the uniform...

Gyroscope: Precession

Gyroscope: Precession

Precession can be demonstrated effectively through a spinning top. If a spinning top is placed on a flat surface near the surface of the Earth at a vertical angle and is not spinning, it will fall over due to the force of gravity producing a torque acting on its center of mass. However, if the top is spinning on its axis, it precesses about the vertical direction, rather than topple over due to this torque. Precessional motion is a combination of a steady circular motion of the axis and the...

You might also read

Related Articles

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

Sort by

Same author

Self-adaptive hetero-phase superlattices in TaS<sub>2</sub> via layer-resolved 1T-to-1H transformations.

National science review·2026

Same author

Isotropic zero thermal expansion in sodalite crystals from 11 to 893 K.

Nature chemistry·2026

Same author

Biaxial Strain-Engineered Pt-Sulfur Vacancy Dual Active Sites in Pt/MoO<sub>2</sub>@MoS<sub>2</sub> Architectures for pH-Universal Hydrogen Evolution.

ACS nano·2026

Same author

Intestinal toxicity evaluation of polygala total saponins in mice according to toxicological evidence chain (TEC) concept.

Frontiers in pharmacology·2026

Same author

2D Perovskite Engineering Enables Robust Self-Assembled Monolayers for High-Performance Perovskite Solar Cells.

Advanced materials (Deerfield Beach, Fla.)·2026

Same author

Subterahertz Spin Relaxation Dynamics of Boron-Vacancy Centers in Hexagonal Boron Nitride.

Nano letters·2026

Search research articles

Related Experiment Video

Updated: Jul 12, 2025

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System

Published on: June 30, 2018

Near-Field GHz Rotation and Sensing with an Optically Levitated Nanodumbbell.

Peng Ju¹, Yuanbin Jin¹, Kunhong Shen¹

¹Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, United States.

|November 1, 2023

Summary

This summary is machine-generated.

We optically levitated a silica nanodumbbell to achieve GHz rotation speeds, creating an ultrasensitive torque detector for fundamental physics research.

Keywords:

Casimir torque levitated optomechanics nanorotor near-field interaction non-Newtonian gravity torque sensing

More Related Videos

Fabrication and Operation of a Nano-Optical Conveyor Belt

Fabrication and Operation of a Nano-Optical Conveyor Belt

Published on: August 26, 2015

Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Related Experiment Videos

Last Updated: Jul 12, 2025

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System

Published on: June 30, 2018

Fabrication and Operation of a Nano-Optical Conveyor Belt

Fabrication and Operation of a Nano-Optical Conveyor Belt

Published on: August 26, 2015

Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Area of Science:

Quantum physics
Nanotechnology
Surface science

Background:

Levitated nonspherical nanoparticles offer unique platforms for quantum rotation studies.
They serve as ultrasensitive torque detectors for probing fundamental particle-surface interactions.

Purpose of the Study:

To optically levitate a silica nanodumbbell in a vacuum.
To drive the nanodumbbell to rotate at GHz frequencies near a surface.
To characterize its torque sensitivity and explore near-field optical phenomena.

Main Methods:

Optical levitation of a silica nanodumbbell in a vacuum.
Rotation of the nanodumbbell at GHz frequencies near a sapphire surface.
Probing near-field laser intensity distribution using a nanodumbbell near a nanograting.

Main Results:

Achieved GHz rotation frequencies for the levitated nanodumbbell.
Demonstrated a torque sensitivity of (5.0 ± 1.1) × 10^-26 N m Hz^-1/2 at room temperature.
Successfully probed near-field laser intensity beyond the optical diffraction limit.

Conclusions:

The levitated nanodumbbell system is a powerful tool for fundamental physics.
It shows potential for measuring Casimir torque and improving non-Newtonian gravity detection limits.