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

IR Spectroscopy: Molecular Vibration Overview01:24

IR Spectroscopy: Molecular Vibration Overview

4.1K
When Infrared (IR) radiation passes through a covalently bonded molecule, the bonds transition from lower to higher vibrational levels. The fundamental vibrational motions that result in infrared absorption can be classified as stretching or bending vibrations.
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
4.1K
Sound Waves: Resonance01:14

Sound Waves: Resonance

3.0K
Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
3.0K
IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration01:16

IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration

2.5K
A covalently bonded heteronuclear diatomic molecule can be modeled as two vibrating masses connected by a spring. The vibrational frequency of the bond can be expressed using an equation derived from Hooke's law, which describes how the force applied to stretch or compress a spring is proportional to the displacement of the spring. In this case, the atoms behave like masses, and the bond acts like a spring.
According to Hooke's law, the vibrational frequency is directly proportional to...
2.5K
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations01:08

IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations

1.6K
Identical bonds within a polyatomic group can stretch symmetrically (in-phase) or asymmetrically (out-of-phase). Similar to hydrogen bonding, these vibrations also influence the shape of the IR peak. Generally, asymmetric stretching frequencies are higher than symmetric stretching frequencies. For example, primary amines exhibit two distinct IR peaks between 3300–3500 cm−1 corresponding to the symmetric and asymmetric N-H stretching, while secondary amines exhibit a single...
1.6K
Concept of Resonance and its Characteristics01:19

Concept of Resonance and its Characteristics

5.8K
If a driven oscillator needs to resonate at a specific frequency, then very light damping is required. An example of light damping includes playing piano strings and many other musical instruments. Conversely, to achieve small-amplitude oscillations as in a car's suspension system, heavy damping is required. Heavy damping reduces the amplitude, but the tradeoff is that the system responds at more frequencies. Speed bumps and gravel roads prove that even a car's suspension system is not...
5.8K
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

551
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
551

You might also read

Related Articles

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

Sort by
Same author

Interferon-elicited lipoprotein metabolism in lung fibroblasts facilitates premetastatic niche formation.

Nature communications·2026
Same author

Dissociable EEG connectivity patterns reflect the latent general and specific dimensions of ADHD in children and adolescents.

European child & adolescent psychiatry·2026
Same author

Decision-making performance and motor skill consistency in basketball short pass-shot sequences under different levels of mental fatigue: an integrated psychophysiological dynamics analysis.

Frontiers in psychology·2026
Same author

An empirical study on exercise addiction and grit among college students: based on 35 exercise sessions.

Frontiers in psychology·2026
Same author

Associations of lifestyle factors and stress levels on abnormal body weight among Chinese adults: a cross-sectional study.

BMC public health·2026
Same author

Scalable and Sustainable Dry Microfabrication Enabled by High-Precision and Wafer-Scale Transfer Lithography of Commercial Photoresists.

Nano-micro letters·2026

Related Experiment Video

Updated: Dec 12, 2025

Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems
07:44

Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems

Published on: April 28, 2016

15.4K

Entropic vibrational resonance.

Luchun Du1,2, Ruoshui Han1, Jiahao Jiang1

  • 1Department of Physics, Yunnan University, Kunming 650091, China.

Physical Review. E
|August 16, 2020
PubMed
Summary
This summary is machine-generated.

We discovered entropic vibrational resonance (EVR) in Brownian particle motion confined by uneven boundaries. A high-frequency signal can amplify a low-frequency signal, demonstrating resonance even without bias force.

More Related Videos

Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
08:54

Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid

Published on: January 25, 2020

5.9K
Interfacial Molecular-level Structures of Polymers and Biomacromolecules Revealed via Sum Frequency Generation Vibrational Spectroscopy
09:43

Interfacial Molecular-level Structures of Polymers and Biomacromolecules Revealed via Sum Frequency Generation Vibrational Spectroscopy

Published on: August 13, 2019

9.7K

Related Experiment Videos

Last Updated: Dec 12, 2025

Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems
07:44

Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems

Published on: April 28, 2016

15.4K
Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
08:54

Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid

Published on: January 25, 2020

5.9K
Interfacial Molecular-level Structures of Polymers and Biomacromolecules Revealed via Sum Frequency Generation Vibrational Spectroscopy
09:43

Interfacial Molecular-level Structures of Polymers and Biomacromolecules Revealed via Sum Frequency Generation Vibrational Spectroscopy

Published on: August 13, 2019

9.7K

Area of Science:

  • Statistical Physics
  • Nonlinear Dynamics
  • Complex Systems

Background:

  • Vibrational resonance typically occurs in energetic potentials.
  • Brownian motion is fundamental to understanding particle behavior in fluids.
  • Constrained systems introduce unique boundary effects.

Purpose of the Study:

  • To demonstrate vibrational resonance in systems with uneven boundaries.
  • To introduce and define entropic vibrational resonance (EVR).
  • To elucidate the mechanisms behind EVR in confined spaces.

Main Methods:

  • Simulating Brownian particle motion in a double-cavity system with uneven boundaries.
  • Analyzing spectral power amplification under high-frequency forcing.
  • Investigating resonance phenomena in the absence of external bias forces.

Main Results:

  • Observed vibrational resonance driven by a high-frequency signal amplifying a low-frequency signal.
  • Identified EVR as a distinct mechanism from resonance in energetic potentials.
  • Characterized two EVR mechanisms: bistable-to-monostable transition and escape rate-frequency matching.

Conclusions:

  • Uneven boundaries can induce vibrational resonance, termed EVR.
  • EVR operates through novel mechanisms distinct from traditional potential-based resonance.
  • This extends the understanding of resonance phenomena to confined, non-potential systems.