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Related Concept Videos

Total Internal Reflection Fluorescence Microscopy01:05

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Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.
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Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
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Related Experiment Video

Updated: Nov 8, 2025

Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition
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Novel Retroreflective Structural Color Films Based on Total Internal Reflection Interference.

Jing Zeng1, Wen Fan2, Kangyu Jia3

  • 1Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China.

Journal of Colloid and Interface Science
|April 19, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a novel retroreflective structural color film (RSCF) that uses interference and total internal reflection. This new material displays dynamic, reversible color changes when stretched or compressed.

Keywords:
Hemisphere arrayInterferenceResponsive colorsStructural colorsTotal internal reflection

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Area of Science:

  • Materials Science
  • Optics
  • Photonics

Background:

  • Structural color materials are widely researched for applications, often relying on nanoscale photonic crystals or film interference.
  • Existing methods typically involve complex fabrication processes and limited dynamic color-changing capabilities.

Purpose of the Study:

  • To report a novel retroreflective structural color film (RSCF) combining interference and total internal reflection (TIR).
  • To investigate the optical properties and dynamic color-changing behavior of the developed RSCF.

Main Methods:

  • Fabrication of a microscale polymer hemisphere array on a polymer matrix.
  • Characterization of optical properties under various illumination and observation conditions.
  • Testing of color change response under uniaxial tensile/compressive deformation.

Main Results:

  • The non-hemisphere side exhibits non-iridescent color under coaxial and iridescent color under noncoaxial conditions.
  • The hemisphere side shows no color, irrespective of illumination or observation.
  • An elastic polyurethane-based RSCF demonstrates reversible color changes upon deformation.

Conclusions:

  • The novel RSCF offers unique optical properties based on combined interference and TIR.
  • The material's ability to dynamically alter color with deformation opens possibilities for novel applications.
  • This research advances structural color materials with tunable and responsive characteristics.