Related Experiment Video
Updated: Sep 19, 2025
06:26
Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
Published on: May 15, 2017
7.2K
Transient Structural Coloration During Dewetting Transition of Water-In-Oil-In-Water Droplets
Dong-Yu Li1, Nan-Nan Deng1,2
1State Key Laboratory of Synergistic Chem-Bio Synthesis, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
Small (Weinheim an Der Bergstrasse, Germany)
|June 9, 2025
Summary
Structural coloration in water-in-oil-in-water droplets creates iridescent colors during dewetting. This process, dependent on droplet size and shape, offers insights for dynamic optical systems.
Area of Science:
- Physics
- Materials Science
- Optics
Background:
- Structural coloration using microscale concave interfaces is a promising method for generating iridescent colors.
- Achieving this phenomenon in water-based droplet systems presents significant challenges.
Purpose of the Study:
- To investigate transient structural coloration during the dewetting transition of water-in-oil-in-water emulsion droplets.
- To understand the factors influencing structural coloration in complex droplet systems.
Main Methods:
- Fabrication of water-in-oil-in-water emulsion droplets.
- Observation and analysis of dewetting transitions.
- Characterization of optical properties, including total internal reflection (TIR).
Main Results:
- Transient structural coloration was observed during the dewetting transition of emulsion droplets.
- Total internal reflection and structural coloration were found to be restricted to a narrow operational window.
- Droplet size ratios and dewetting morphologies were identified as key factors dictating this operational window.
Conclusions:
- The study deepens the understanding of structural coloration in complex droplet systems.
- Findings provide insights for designing and controlling dynamic optical systems.
- Potential applications include adaptive photonic devices and responsive optical technologies.
Related Concept Videos
02:39Phase Transitions: Vaporization and Condensation
18.8K
The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase...
18.8K
02:33Phase Transitions: Sublimation and Deposition
18.1K
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
18.1K
03:22Colloids
18.0K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
18.0K
01:07Cohesion
56.1K
Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a...
On a...
56.1K