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

Interfacial Electrochemical Methods: Overview01:06

Interfacial Electrochemical Methods: Overview

922
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
922
Theories of Dissolution: The Danckwerts' Model and Interfacial Barrier Model01:09

Theories of Dissolution: The Danckwerts' Model and Interfacial Barrier Model

826
Various dissolution theories provide insight into the factors that influence the dissolution rate. Danckwerts' Model suggests that turbulence, rather than a stagnant layer, characterizes the dissolution medium at the solid-liquid interface. In this model, the agitated solvent contains macroscopic packets that move to the interface via eddy currents, facilitating the absorption and delivery of the drug to the bulk solution. The regular replenishment of solvent packets maintains the...
826
Ribosome Profiling02:24

Ribosome Profiling

4.2K
Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
4.2K
Body Temperature01:25

Body Temperature

5.0K
The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
5.0K
Body Temperature01:07

Body Temperature

1.5K
Body temperature reflects the equilibrium between heat production and heat loss within the body. Most heat is generated by metabolically active tissues, particularly the liver, heart, brain, kidneys, and endocrine organs. At rest, skeletal muscles contribute 20–30% of total heat production, but during vigorous exercise, this can increase up to 30–40 times.
The average body temperature is approximately 37°C (98.6°F) and typically ranges from 36.1–37.2°C...
1.5K
Effects of Temperature on Free Energy02:11

Effects of Temperature on Free Energy

28.5K
The spontaneity of a process depends upon the temperature of the system. Phase transitions, for example, will proceed spontaneously in one direction or the other depending upon the temperature of the substance in question. Likewise, some chemical reactions can also exhibit temperature-dependent spontaneities. To illustrate this concept, the equation relating free energy change to the enthalpy and entropy changes for the process is considered:
28.5K

You might also read

Related Articles

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

Sort by
Same author

Beyond photon shot noise: Chemical limits in spectrophotometric precision.

The Journal of chemical physics·2026
Same author

Steady-state quantum coherence in driven open quantum system: An optimal transformation analysis.

The Journal of chemical physics·2026
Same author

Recent Advances in Thalassemia Research: A Comprehensive Assessment From Diagnostic Technologies to Clinical Treatment.

Journal of clinical laboratory analysis·2026
Same author

Effects of asymmetric interaction on thermalization: Boundary conditions and asymptotic integrability.

Physical review. E·2026
Same author

Evaluating the Quality Performance of Sysmex and Mindray Hematology Analyzers for Blood Cell Counting Based on External Quality Assessment Data.

International journal of laboratory hematology·2026
Same author

Evaluation of harmonization among thyroid hormone testing systems: A comparative study based on external quality assessment data.

Practical laboratory medicine·2025

Related Experiment Video

Updated: Feb 15, 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

Anomalous interfacial temperature profile induced by phonon localization.

Yue Liu1, Dahai He1

  • 1Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen 361005, Fujian, China.

Physical Review. E
|January 20, 2018
PubMed
Summary
This summary is machine-generated.

Localized phonon modes cause anomalous negative temperature gradients in materials. This study reveals how these modes influence temperature profiles in harmonic and anharmonic systems, impacting thermal transport.

More Related Videos

Dissociation of the Confounding Influences of Expectancy and Integrative Difficulty Residing in Anomalous Sentences in Event-related Potential Studies
05:22

Dissociation of the Confounding Influences of Expectancy and Integrative Difficulty Residing in Anomalous Sentences in Event-related Potential Studies

Published on: May 9, 2019

5.8K
Composite Scaffolds of Interfacial Polyelectrolyte Fibers for Temporally Controlled Release of Biomolecules
11:13

Composite Scaffolds of Interfacial Polyelectrolyte Fibers for Temporally Controlled Release of Biomolecules

Published on: August 19, 2015

8.8K

Related Experiment Videos

Last Updated: Feb 15, 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
Dissociation of the Confounding Influences of Expectancy and Integrative Difficulty Residing in Anomalous Sentences in Event-related Potential Studies
05:22

Dissociation of the Confounding Influences of Expectancy and Integrative Difficulty Residing in Anomalous Sentences in Event-related Potential Studies

Published on: May 9, 2019

5.8K
Composite Scaffolds of Interfacial Polyelectrolyte Fibers for Temporally Controlled Release of Biomolecules
11:13

Composite Scaffolds of Interfacial Polyelectrolyte Fibers for Temporally Controlled Release of Biomolecules

Published on: August 19, 2015

8.8K

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Thermodynamics

Background:

  • Understanding thermal transport in segmented materials is crucial for designing advanced functional materials.
  • Anomalous temperature gradients can significantly alter material properties and performance.
  • Localized phonon modes are known to influence thermal conductivity but their effect on temperature profiles is less explored.

Purpose of the Study:

  • To investigate the origin of anomalous negative temperature gradients in multisegment harmonic and anharmonic systems.
  • To elucidate the role of interfacial localized phonon modes in shaping temperature profiles.
  • To analyze the impact of phonon interactions and anharmonicity on these localized modes and their thermal contributions.

Main Methods:

  • Integration of power spectral density analysis to obtain temperature profiles.
  • Investigation of power spectral density patterns to identify localized phonon modes.
  • Utilized inverse participation ratio and normal mode analysis for mode characterization.
  • Examination of temperature accumulation function to quantify thermal contributions.

Main Results:

  • An anomalous negative temperature gradient was observed within the interfacial segment of both harmonic and anharmonic systems.
  • Interfacial localized phonon modes were identified as the cause of this counterintuitive phenomenon.
  • In harmonic systems, out-band localized modes led to concave temperature profiles and overcooling.
  • In anharmonic systems, phonon-phonon interactions excited localized modes, contributing significantly to interfacial temperature.
  • Abolition of the negative temperature gradient occurred at high anharmonicity due to full mixing of localized modes.

Conclusions:

  • Localized phonon modes at interfaces are critical determinants of interfacial temperature profiles.
  • The interplay between system dimensionality, anharmonicity, and phonon interactions governs the thermal behavior of localized modes.
  • This work provides fundamental insights into non-equilibrium thermal transport phenomena driven by localized vibrational modes.