Unclonable Plasmonic Security Labels Achieved by Shadow-Mask-Lithography-Assisted Self-Assembly

Yuanhui Zheng, Cheng Jiang, Soon Hock Ng, Yong Lu, Fei Han, Udo Bach, J. Justin Gooding

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Researchers demonstrate a low-cost, nondestructive, unclonable anti-counterfeiting strategy that takes advantage of multifunctional fluorescein-embedded silver@silica core-shell NPs as information carriers for graphical and spectral coding. A shadow-mask-lithography-assisted self-assembly method is developed for the fabrication of the plasmonic security labels, in which the multifunctional core-shell nanoparticles (NPs) are electrostatically adsorbed onto an amino-terminated micropattern generated by shadow mask lithography. The random arrangement of discrete NPs on the micropatterns, originating from Brownian motion during the self-assembly, makes the security labels unclonable.

Original languageEnglish
Pages (from-to)2330-2336
Number of pages7
JournalAdvanced Materials
Volume28
Issue number12
DOIs
Publication statusPublished - 23 Mar 2016

Keywords

  • core-shell nanoparticles
  • dark-field and fluorescence microscopy
  • security labels
  • self-assembly
  • surface-enhanced Raman scattering

Cite this

Zheng, Yuanhui ; Jiang, Cheng ; Ng, Soon Hock ; Lu, Yong ; Han, Fei ; Bach, Udo ; Gooding, J. Justin. / Unclonable Plasmonic Security Labels Achieved by Shadow-Mask-Lithography-Assisted Self-Assembly. In: Advanced Materials. 2016 ; Vol. 28, No. 12. pp. 2330-2336.
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Unclonable Plasmonic Security Labels Achieved by Shadow-Mask-Lithography-Assisted Self-Assembly. / Zheng, Yuanhui; Jiang, Cheng; Ng, Soon Hock; Lu, Yong; Han, Fei; Bach, Udo; Gooding, J. Justin.

In: Advanced Materials, Vol. 28, No. 12, 23.03.2016, p. 2330-2336.

Research output: Contribution to journalArticleResearchpeer-review

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AB - Researchers demonstrate a low-cost, nondestructive, unclonable anti-counterfeiting strategy that takes advantage of multifunctional fluorescein-embedded silver@silica core-shell NPs as information carriers for graphical and spectral coding. A shadow-mask-lithography-assisted self-assembly method is developed for the fabrication of the plasmonic security labels, in which the multifunctional core-shell nanoparticles (NPs) are electrostatically adsorbed onto an amino-terminated micropattern generated by shadow mask lithography. The random arrangement of discrete NPs on the micropatterns, originating from Brownian motion during the self-assembly, makes the security labels unclonable.

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