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

Chirality02:25

Chirality

29.8K
Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
29.8K
Chirality in Nature02:30

Chirality in Nature

17.3K
Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.
17.3K
Chirality at Nitrogen, Phosphorus, and Sulfur02:30

Chirality at Nitrogen, Phosphorus, and Sulfur

7.1K
Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
7.1K
Molecules with Multiple Chiral Centers02:25

Molecules with Multiple Chiral Centers

15.2K
Molecules that possess multiple chiral centers can afford a large number of stereoisomers. For instance, while some molecules like 2-butanol have one chiral center, defined as a tetrahedral carbon atom with four different substituents attached, several molecules like butane-2,3-diol have multiple chiral centers. A simple formula to predict the number of stereoisomers possible for a molecule with n chiral centers is 2n. However, there can be a lower number where some of the stereoisomers are...
15.2K
Naturalistic Observations02:30

Naturalistic Observations

17.6K
If you want to understand how behavior occurs, one of the best ways to gain information is to simply observe the behavior in its natural context. However, people might change their behavior in unexpected ways if they know they are being observed. How do researchers obtain accurate information when people tend to hide their natural behavior? As an example, imagine that your professor asks everyone in your class to raise their hand if they always wash their hands after using the restroom. Chances...
17.6K
Observational Learning01:12

Observational Learning

1.0K
Albert Bandura's observational learning, also known as imitation or modeling, occurs when a person observes and imitates another's behavior. It is a quicker process than operant conditioning. A well-known example is the Bobo doll study, where children who saw an adult acting aggressively towards the doll were more likely to act aggressively when left alone, compared to those who observed a nonaggressive adult. Many psychologists view observational learning as a form of latent learning...
1.0K

You might also read

Related Articles

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

Sort by
Same author

High-Throughput Monitoring of Electrochemical Reactions on Single Nanoparticles via Fourier Transform Wide-Field Electrochemical Hyperspectral Imaging.

ACS nano·2026
Same author

Directly probing the carrier transfer length in 2D-material transistors.

Nature·2026
Same author

Direct Visualization of Canted Magnetization and Topological Charges in Self-Intercalated van der Waals Magnet Cr<sub>1+δ</sub>Te<sub>2</sub> with Hidden Structural Phases.

ACS applied materials & interfaces·2026
Same author

Scaling two-dimensional semiconductor nanoribbons for high-performance electronics.

Nature communications·2026
Same author

Fermi-level depinning achieved by high-work-function Au<sub>1-x</sub>Se<sub>x</sub> alloy contacts for high-performance p-type WSe<sub>2</sub> transistors.

Nature communications·2026
Same author

Line Width-Activated Interband Contribution to Thermally Driven Phonon Angular Momentum.

Nano letters·2026

Related Experiment Video

Updated: Feb 14, 2026

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
10:40

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

8.0K

Observation of chiral phonons.

Hanyu Zhu1,2, Jun Yi1, Ming-Yang Li3

  • 1Nanoscale Science and Engineering Center, University of California, Berkeley, CA 94720, USA.

Science (New York, N.Y.)
|February 9, 2018
PubMed
Summary

Phonons, or quantized lattice vibrations, can exhibit intrinsic chirality in monolayer tungsten diselenide. This discovery, confirmed by infrared circular dichroism, opens new avenues for solid-state physics and information processing.

More Related Videos

A Micropatterning Assay for Measuring Cell Chirality
08:07

A Micropatterning Assay for Measuring Cell Chirality

Published on: March 11, 2022

2.7K
Enzymatic Cascade Reactions for the Synthesis of Chiral Amino Alcohols from L-lysine
09:14

Enzymatic Cascade Reactions for the Synthesis of Chiral Amino Alcohols from L-lysine

Published on: February 16, 2018

12.7K

Related Experiment Videos

Last Updated: Feb 14, 2026

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
10:40

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

8.0K
A Micropatterning Assay for Measuring Cell Chirality
08:07

A Micropatterning Assay for Measuring Cell Chirality

Published on: March 11, 2022

2.7K
Enzymatic Cascade Reactions for the Synthesis of Chiral Amino Alcohols from L-lysine
09:14

Enzymatic Cascade Reactions for the Synthesis of Chiral Amino Alcohols from L-lysine

Published on: February 16, 2018

12.7K

Area of Science:

  • Condensed matter physics
  • Quantum mechanics
  • Materials science

Background:

  • Chirality, a property of symmetry breaking, is fundamental in particle physics and observed in electron behavior in condensed matter.
  • Unconventional transport phenomena, like the quantum Hall effect, are governed by electron chirality.
  • Understanding phonon chirality is crucial for advancing solid-state phenomena.

Purpose of the Study:

  • To demonstrate the existence of intrinsic chirality in phonons.
  • To investigate the role of broken inversion symmetry in creating chiral phonons.
  • To explore the implications of chiral phonons in materials like monolayer tungsten diselenide.

Main Methods:

  • Utilizing indirect infrared absorption to identify phonons via hole-phonon interactions.
  • Employing infrared circular dichroism to confirm phonon chirality.
  • Analyzing the broken inversion symmetry in the tungsten diselenide lattice.

Main Results:

  • Phonons in monolayer tungsten diselenide exhibit intrinsic chirality.
  • The degeneracy of phonon modes is lifted due to broken lattice inversion symmetry.
  • Chirality was confirmed through pseudoangular momentum conservation observed via circular dichroism.

Conclusions:

  • Chiral phonons are a novel quantum phenomenon in condensed matter.
  • This finding has significant implications for electron-phonon coupling and topological states in solids.
  • Chiral phonons offer potential for energy-efficient information processing applications.