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Related Experiment Video

Updated: Apr 21, 2026

Synthesis and Characterization of Supramolecular Colloids

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

Self-assembled coffee-ring colloidal crystals for structurally colored contact lenses.

Zhuoying Xie¹, Linliang Li, Panmiao Liu

¹State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China.

Small (Weinheim an Der Bergstrasse, Germany)

|October 22, 2014

Summary

Researchers developed novel structural-colored contact lenses using photonic crystals. These colorant-free lenses offer brilliant, variable colors and enhance safety compared to traditional options.

Keywords:

coffee-ring effect colloidal crystals contact lenses photonic crystals structural colors

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Area of Science:

Materials Science
Biomedical Engineering
Optics

Background:

Traditional colored contact lenses often incorporate pigments, raising concerns about potential leaching and adverse ocular effects.
Structural coloration, utilizing light interference rather than dyes, offers a biocompatible alternative for achieving vibrant colors.

Purpose of the Study:

To fabricate and characterize novel circular contact lenses with structural color.
To demonstrate a colorant-free approach for producing brilliant and variable cosmetic contact lenses.
To assess the safety advantages over conventional pigmented contact lenses.

Main Methods:

Fabrication of structural-colored contact lenses via replication of self-assembled colloidal photonic crystal templates.
Characterization of optical properties and color variability under different illumination conditions.
Assessment of material biocompatibility and absence of colorant leaching.

Main Results:

Successfully fabricated circular contact lenses exhibiting structural color.
Demonstrated variable and brilliant color displays dependent on light angle and observation.
Confirmed the absence of added colorants, mitigating risks associated with traditional lenses.

Conclusions:

Structural-colored contact lenses fabricated using photonic crystal replication offer a safe and aesthetically pleasing alternative.
This colorant-free approach eliminates potential harm from pigment leaching.
The technology holds promise for advanced cosmetic and therapeutic contact lens applications.