Issue 9, 2018

Microfluidic printing directing photonic crystal bead 2D code patterns

Abstract

We herein report a new method for the rapid preparation of photonic crystal patterns through microfluidic printing technology where the photonic crystal pixels of the patterns can be accurately manipulated. Poly(styrene-methyl methacrylate-acrylic acid)-generation 2 polyamidoamine-CdTe/ZnS (P(St-MMA-AA)-G2 PAMAM-CdTe/ZnS) hybrid microspheres were prepared by conjugating P(St-MMA-AA) and CdTe/ZnS quantum dots (QDs) with G2 PAMAM dendrimers as bridges through in situ reaction. Strong interactions between dendrimer-modified microspheres significantly reduce the cracking of photonic crystal films and the formation of coffee-ring pixels. In addition, taking advantage of a microfluidic printing device, we fabricated a fluorescent two-dimensional (2D) code pattern of photonic crystal (PC) beads by using the as-synthesized P(St-MMA-AA)-G2 PAMAM-CdTe/ZnS hybrid microspheres. This work developed a new microfluidic printing technology for the fabrication of multi-signal 2D code patterns with structural colors in daylight and fluorescence under UV light, which may have potential applications in the anti-counterfeiting and optoelectronic fields.

Graphical abstract: Microfluidic printing directing photonic crystal bead 2D code patterns

  • This article is part of the themed collection: Photonics

Supplementary files

Article information

Article type
Paper
Submitted
22 Nov. 2017
Accepted
29 Janv. 2018
First published
29 Janv. 2018

J. Mater. Chem. C, 2018,6, 2336-2341

Microfluidic printing directing photonic crystal bead 2D code patterns

K. Liu, Y. Tian, Q. Li, X. Du, J. Zhang, C. Wang and S. Chen, J. Mater. Chem. C, 2018, 6, 2336 DOI: 10.1039/C7TC05355J

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