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Issue 9, 2018
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Microfluidic printing directing photonic crystal bead 2D code patterns

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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

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Publication details

The article was received on 22 Nov 2017, accepted on 29 Jan 2018 and first published on 29 Jan 2018

Article type: Paper
DOI: 10.1039/C7TC05355J
Citation: J. Mater. Chem. C, 2018,6, 2336-2341

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    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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