4.8 Article

Scalable Structural Coloration of Carbon Nanotube Fibers via a Facile Silica Photonic Crystal Self-Assembly Strategy

Journal

ACS NANO
Volume -, Issue -, Pages -

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acsnano.2c11296

Keywords

carbon nanotubes; structural coloration; photonic crystal; fibers; silica

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A simple and scalable liquid-phase method has been developed to achieve the structural coloration of carbon nanotube fibers (CNTFs). By using self-assembled photonic crystal layers formed by controllable-sized SiO2 nanospheres on the surface of CNTFs, brilliant colors can be exhibited. The colors of SiO2 nanoparticle-coated CNTFs can be easily changed by tuning the sizes of SiO2 nanospheres. This method provides a simple, effective, and promising way for large-scale production of colorful CNTFs.
The coloration of carbon nanotube (CNT) fibers (CNTFs) is a long-lasting challenge because of the intrinsic black color and chemically inert surfaces of CNTs, which cannot satisfy the aesthetic and fashion requirements and thus significantly restrict their performance in many cutting-edge fields. Recently, a structural coloration method of CNTFs was developed by our group using atomic layer deposition (ALD) technology. However, the ALD-based structural coloration method of CNTFs is expensive, time-consuming, and not suitable for the large-scale production of colorful CNTFs. Herein, we developed a very simple and scalable liquid-phase method to realize the structural coloration of CNTFs. A SiO2/ethanol dispersion containing SiO2 nanospheres with controllable sizes was synthesized. The SiO2 nanospheres could self-assemble into photonic crystal layers on the surface of CNTFs and exhibited brilliant colors. The colors of SiO2 nanoparticle-coated CNTFs could be easily changed by tuning the sizes of SiO2 nanospheres. This method provides a simple, effective, and promising way for the large-scale production of colorful CNTFs.

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