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Issue 42, 2016
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Stacking of colors in exfoliable plasmonic superlattices

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Abstract

Color printing with plasmonic resonators can overcome limitations in pigment-based printing approaches. While layering in pigment-based prints results in familiar color mixing effects, the color effects of stacking plasmonic resonator structures have not been investigated. Here, we demonstrate an experimental strategy to fabricate a 3-tiered complex superlattice of nanostructures with multiple sets of building blocks. Laser interference lithography was used to fabricate the nanostructures and a thin-layer of aluminum was deposited to introduce plasmonic colors. Interestingly, the structures exhibited drastic color changes when the layers of structures were sequentially exfoliated. Our theoretical analysis shows that the colors of the superlattice nanostructure were predominantly determined by the plasmonic properties of the two topmost layers. These results suggest the feasibility of the sub-wavelength vertical stacking of multiple plasmonic colors for applications in sensitive tamper-evident seals, dense 3D barcoding, and substrates for plasmonic color laser printing.

Graphical abstract: Stacking of colors in exfoliable plasmonic superlattices

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Publication details

The article was received on 28 Apr 2016, accepted on 28 Sep 2016 and first published on 30 Sep 2016


Article type: Paper
DOI: 10.1039/C6NR03466G
Citation: Nanoscale, 2016,8, 18228-18234
  • Open access: Creative Commons BY license
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    Stacking of colors in exfoliable plasmonic superlattices

    M. Jalali, Y. Yu, K. Xu, R. J. H. Ng, Z. Dong, L. Wang, S. Safari Dinachali, M. Hong and J. K. W. Yang, Nanoscale, 2016, 8, 18228
    DOI: 10.1039/C6NR03466G

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