Photochemical synthesis of dendritic silver nano-particles for anti-counterfeiting

Zhi Zhao, Ninad Chamele, Michael Kozicki, Yu Yao, Chao Wang

Research output: Contribution to journalArticle

Abstract

High-trust anti-counterfeit methodologies that tag only genuine goods are in high demand globally in manufacturing and security. However, prevalent tagging methods often face challenges in manufacturing cost, structural reliability, and simplifying readout procedures. Here we report a one-pot photochemical synthetic method to produce large quantities of dendritic silver nano-particles (AgNPs) within 20 minutes and under ambient conditions, promising for large-scale manufacturing of physical taggants. By tuning the experimental conditions, such as the UV illumination time and the concentration of silver-reducing agent, poly(allylamine), we demonstrate the feasibility of creating unique dendritic AgNPs with distinctive morphological characteristics. Our investigation illustrates the significant impact of the interplay between silver nucleation and growth that is critical in producing the dendritic AgNP taggants with controlled shape and sizes. Importantly, we verify by simple optical imaging and image analysis that all the dendrites possess a singular set of minutiae that lead to a vast number of unclonable features, suitable for anti-counterfeiting labels.

Original languageEnglish (US)
Pages (from-to)6099-6104
Number of pages6
JournalJournal of Materials Chemistry C
Volume7
Issue number20
DOIs
StatePublished - Jan 1 2019

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Silver
Allylamine
Reducing Agents
Reducing agents
Image analysis
Labels
Nucleation
Tuning
Lighting
Imaging techniques
Costs

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

Cite this

Photochemical synthesis of dendritic silver nano-particles for anti-counterfeiting. / Zhao, Zhi; Chamele, Ninad; Kozicki, Michael; Yao, Yu; Wang, Chao.

In: Journal of Materials Chemistry C, Vol. 7, No. 20, 01.01.2019, p. 6099-6104.

Research output: Contribution to journalArticle

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