Plasmonic Nanogels for Unclonable Optical Tagging

ACS Applied Materials & Interfaces
Limei TianSrikanth Singamaneni

Abstract

We demonstrate the fabrication of novel functional gel coatings with randomized physical and chemical patterns that enable dual encoding ability to realize unclonable optical tags. This design is based on swelling-mediated massive reconstruction of an ultrathin responsive gelatinous polymer film uniformly adsorbed with plasmonic nanostructures into a randomized network of interacting folds, resulting in bright electromagnetic hotspots within the folds. We reveal a strong correlation between the topology and near-field electromagnetic field enhancement due to the intimate contact between two plasmonic surfaces within the folds, each of them representing a unique combination of local topography and chemical distribution caused by the formation of electromagnetic hotspots. Because of the efficient trapping of the Raman reporters within the uniquely distributed electromagnetic hotspots, the surface enhanced Raman scattering enhancement from the morphed plasmonic gel was found to be nearly 40 times higher compared to that from the pristine plasmonic gel. Harnessing the nondeterministic nature of the folds, the folded plasmonic gel can be employed as a multidimensional (with dual topo-chemical encoding) optical taggant for prospectiv...Continue Reading

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Citations

Sep 21, 2016·Topics in Current Chemistry·C DispenzaM Jonsson
Oct 13, 2017·Chemical Society Reviews·Swati ShikhaYong Zhang
Feb 2, 2018·Science Advances·Miguel R Carro-TembouryThomas Just Sørensen
Jan 26, 2020·Nature Communications·Yuqing GuJian Ye
Feb 16, 2021·ACS Applied Materials & Interfaces·Neslihan TorunM Serdar Onses
Jun 2, 2021·ACS Applied Materials & Interfaces·Guixiong ChenTailiang Guo
Jan 15, 2019·ACS Applied Materials & Interfaces·Sisi CaoSrikanth Singamaneni
Jan 17, 2019·ACS Applied Materials & Interfaces·Riikka Arppe-TabbaraThomas Just Sørensen

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