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Photoluminescence: Applications

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...

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Microfluidic Fabrication of Polymeric and Biohybrid Fibers with Predesigned Size and Shape

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Published on: January 8, 2014

Colloidal Photonic Fibers for Reflectively Colorful Radiative Cooling Fabrics.

Sewon Ahn¹, Jaewon Lee¹, Soyul Kwak¹

¹KU-KIST Graduate School of Converging Science and Technology Korea University Seoul Republic of Korea.

|April 24, 2026

Summary

This summary is machine-generated.

New photonic fibers offer colorful, passive daytime radiative cooling. These scalable, pigment-free textiles combine structural color with mid-infrared emission for effective cooling under sunlight.

Keywords:

colloids metamerism photonic glass radiative cooling structured fluids

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Area of Science:

Materials Science
Nanotechnology
Optics

Background:

Daytime radiative cooling is a sustainable thermal management strategy.
Current materials lack color, transformability, and scalability for widespread use.

Purpose of the Study:

To develop colorful, scalable radiative cooling materials.
To create pigment-free structural cooling fibers with tunable colors.

Main Methods:

Microfluidic extrusion of silica nanoparticle suspensions in acrylate resin.
Formation of amorphous photonic glass via shear flow and photocuring.
Weaving photonic fibers into textiles for performance evaluation.

Main Results:

Fibers exhibit permanent, angle-independent structural coloration tunable by nanoparticle size.
Materials maintain high broadband mid-infrared emissivity (>0.9) from silica phononic vibrations.
Photonic glass textiles show high solar reflectance and effective daytime cooling under direct sunlight.

Conclusions:

Introduced a scalable method for producing colorful radiative cooling fibers.
Demonstrated the potential of photonic glass textiles for energy-saving applications.
Bridged photonic design with practical textile applications for wearable and outdoor systems.