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

Phase-lead and Phase-lag Controllers01:22

Phase-lead and Phase-lag Controllers

583
Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass...
583
Action Potential: Phases of Stimulation01:28

Action Potential: Phases of Stimulation

12.6K
The action potential is a complex electrical event that occurs in excitable cells, such as neurons and muscle cells. It consists of several distinct phases, each with specific characteristics.
Resting Phase:
In this phase, the cell's membrane is at its resting potential, typically around -70 millivolts (mV) for neurons. Inside the cell, there is a higher concentration of potassium ions (K+) and a lower concentration of sodium ions (Na+). Voltage-gated sodium channels are closed, and...
12.6K
Controlled-Potential Coulometry: Electrolytic Methods01:17

Controlled-Potential Coulometry: Electrolytic Methods

738
Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential...
738
Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

479
Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
479
Time and frequency -Domain Interpretation of Phase-lag Control01:21

Time and frequency -Domain Interpretation of Phase-lag Control

423
Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any...
423
Phase Diagrams02:39

Phase Diagrams

50.5K
A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
50.5K

You might also read

Related Articles

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

Sort by
Same author

Amorphous aggregates with a very wide size distribution play a central role in crystal nucleation.

Chemical science·2024
Same author

Electromagnetic Enantiomer: Chiral Nanophotonic Cavities for Inducing Chemical Asymmetry.

ACS nano·2024
Same author

A method for rheological measurements of air sensitive samples.

The Review of scientific instruments·2024
Same author

Lifting Hofmeister's Curse: Impact of Cations on Diffusion, Hydrogen Bonding, and Clustering of Water.

Journal of the American Chemical Society·2023
Same author

A Second Glass Transition Observed in Single-Component Homogeneous Liquids Due to Intramolecular Vitrification.

Journal of the American Chemical Society·2023
Same author

Author Correction: Understanding the emergence of the boson peak in molecular glasses.

Nature communications·2023

Related Experiment Video

Updated: Feb 13, 2026

Controllable Nucleation of Cavitation from Plasmonic Gold Nanoparticles for Enhancing High Intensity Focused Ultrasound Applications
08:19

Controllable Nucleation of Cavitation from Plasmonic Gold Nanoparticles for Enhancing High Intensity Focused Ultrasound Applications

Published on: October 5, 2018

6.9K

Control over phase separation and nucleation using a laser-tweezing potential.

Finlay Walton1, Klaas Wynne2

  • 1School of Chemistry, WestCHEM, University of Glasgow, Glasgow, UK.

Nature Chemistry
|March 7, 2018
PubMed
Summary
This summary is machine-generated.

Researchers demonstrate laser-tweezing potential to control phase nucleation and separation. This method utilizes proximity to critical points to induce concentration gradients, offering new ways to manipulate matter.

More Related Videos

Laser Micro-Irradiation to Study DNA Recruitment During S Phase
07:11

Laser Micro-Irradiation to Study DNA Recruitment During S Phase

Published on: April 16, 2021

4.9K
Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

10.4K

Related Experiment Videos

Last Updated: Feb 13, 2026

Controllable Nucleation of Cavitation from Plasmonic Gold Nanoparticles for Enhancing High Intensity Focused Ultrasound Applications
08:19

Controllable Nucleation of Cavitation from Plasmonic Gold Nanoparticles for Enhancing High Intensity Focused Ultrasound Applications

Published on: October 5, 2018

6.9K
Laser Micro-Irradiation to Study DNA Recruitment During S Phase
07:11

Laser Micro-Irradiation to Study DNA Recruitment During S Phase

Published on: April 16, 2021

4.9K
Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

10.4K

Area of Science:

  • Physical Chemistry
  • Materials Science
  • Laser Physics

Background:

  • Controlling phase nucleation and polymorph crystallization remains a significant challenge in materials science.
  • Existing methods for crystallization engineering lack a fundamental physical understanding, hindering predictable control.

Purpose of the Study:

  • To elucidate the physical mechanisms behind laser-induced nucleation and phase separation.
  • To demonstrate a novel method for controlling phase transitions using laser-tweezing potentials.

Main Methods:

  • Utilizing the proximity of a liquid-liquid critical point or binodal line.
  • Employing a laser-tweezing potential to induce localized concentration gradients.
  • Developing a theoretical model based on stored electromagnetic energy to explain free-energy potentials.

Main Results:

  • Demonstrated that laser-tweezing potentials can induce concentration gradients, driving phase separation.
  • Confirmed experimental evidence of laser-induced phase separation and nucleation in a liquid mixture.
  • Validated a theoretical model linking laser energy to free-energy potentials for phase manipulation.

Conclusions:

  • The proximity to critical points combined with laser-tweezing potential offers precise control over phase nucleation.
  • This work provides a physical explanation for non-photochemical laser-induced nucleation.
  • The findings suggest new avenues for manipulating matter at the nanoscale using light.