Plasmonic Nanoparticles as a Physically Unclonable Function for Responsive Anti‐Counterfeit Nanofingerprints

Smith, Alison F.; Patton, Paul; Skrabalak, Sara E.

doi:10.1002/adfm.201503989

Cited by 140 publications

(113 citation statements)

References 35 publications

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“…The two key features for anticounterfeiting applications are 1) the optical properties of the constituting materials, primarily originating from the chemical components used in the ink, and 2) the complexity of the coded patterns . Security inks have been fabricated using inorganic semiconductor nanocrystals, organic dyes, metal nanoclusters and complexes, carbon dots, rare‐earth‐doped complexes, and up‐conversion nanoparticles . It is still challenging to prepare luminescent materials with well‐controlled emission properties.…”

Section: Introductionmentioning

confidence: 99%

Fluorescent Carbon‐ and Oxygen‐Doped Hexagonal Boron Nitride Powders as Printing Ink for Anticounterfeit Applications

Liu

Nattestad

Naficy

et al. 2019

Advanced Optical Materials

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Increasing demands for optical anticounterfeiting technology require the development of versatile luminescent materials with tunable photoluminescence properties. Herein, a number of fluorescent carbon‐ and oxygen‐doped hexagonal boron nitride (denoted as BCNO) phosphors are found to offer a such high‐tech anticounterfeiting solution. These multicolor BCNO powders, developed in a two‐step process with controlled annealing and oxidation, feature rod‐like particle shape, with varied luminescence properties. Studies of the optical properties of BCNO, along with other characterization, provide insight into this underexplored material. Anticounterfeiting applications are demonstrated with printed patterns which are indistinguishable to the naked eye under visible light but become highly discernible under UV irradiation. The fabricated patterns are demonstrated to be both chemically stable in corrosive environments and physically robust in mechanical bending testing. These properties render BCNO as promising and versatile anticounterfeiting material a wide variety of environments.

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Section: Introductionmentioning

confidence: 99%

Fluorescent Carbon‐ and Oxygen‐Doped Hexagonal Boron Nitride Powders as Printing Ink for Anticounterfeit Applications

Liu

Nattestad

Naficy

et al. 2019

Advanced Optical Materials

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“…[1][2][3] Several approaches, such as hologram attachment, [4] radio-frequency identification (RFID), [5] isotope tracking, [6] and luminescence printing, [7][8][9][10] have been applied to realize the technology. [1][2][3] Several approaches, such as hologram attachment, [4] radio-frequency identification (RFID), [5] isotope tracking, [6] and luminescence printing, [7][8][9][10] have been applied to realize the technology.…”

Section: Introductionmentioning

confidence: 99%

“…Anticounterfeit technologies are widely employed for security and protection, which are essential elements for a variety of applications including banknotes, ID cards, documents, medicines, and valuable items. [1][2][3] Several approaches, such as hologram attachment, [4] radio-frequency identification (RFID), [5] isotope tracking, [6] and luminescence printing, [7][8][9][10] have been applied to realize the technology. The hologram-based method is a conventionally adopted approach for certifying products.…”

Section: Introductionmentioning

confidence: 99%

Plasmonic Nanowire‐Enhanced Upconversion Luminescence for Anticounterfeit Devices

Park

Jung

Kwon

et al. 2016

Adv Funct Materials

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A novel, efficient, cost-effective, and high-level security performance anticounterfeit device achieved by plasmonic-enhanced upconversion luminescence (UCL) is demonstrated. The plasmonic architecture consists of the randomly dispersed Ag nanowires (AgNWs) network, upconversion nanoparticles (UCNPs) monolayer, and metal film, in which the UCL is enhanced by a few tens, compared to reference sample, becuase the plasmonic modes lead to the concentration of the incident near infrared (NIR) light in the UCNPs monolayer. In the configuration, both the localized surface plasmons (LSPs) around the metallic nanostructures and gap plasmon polaritons (GPPs) confined in the UCNPs monolayer, significantly contribute to the UCL enhancement. The UCL enhancement mechanism resulting from enhanced NIR absorption, boosted internal quantum process, and formation of strong plasmonic hot spots in the plasmonic architecture is analyzed theoretically and numerically. More interestingly, a proof-of-concept anticounterfeit device using the plasmonic-enhanced UCL is proposed, through which a nonreusable and high-level cost-effective security device protecting the genuine products is realized.S P n .[34] The latter is due to the typical linear decay of the excited population, whereas the nonlinear process is led by the two-photon process-intervened energy transfer. [28,[35][36][37] The pNUM configuration is observed to exhibit the threshold for the linear process at a lower excitation power than that for other architectures, indicating that the second excited level in Adv. Funct. Mater. 2016, 26, 7836-7846 www.afm-journal.de www.MaterialsViews.com full paper 7838 wileyonlinelibrary.com

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“…Chief among these are their subwavelength dimensions (leading to ultradense, ultrathin pixel arrays), and their long-term environmental stability (they do not degrade or fade over time due to radiation exposure). As a result, plasmonic filters have been positioned as new technological solutions for subwavelength color printing, [1,4,[7][8][9]12] anticounterfeiting measures, [19,20] and RGB splitting for image sensors; [2,17,21,22] thus representing one of the most promising, technologically relevant areas of current plasmonic research activity. Here, we explore a new application of polarizationcontrolled plasmonic filters: dual output, full-color optical image encoding.…”

mentioning

confidence: 99%

Plasmonic Color Filters as Dual‐State Nanopixels for High‐Density Microimage Encoding

Heydari

Sperling

Neale

et al. 2017

Adv Funct Materials

116

110

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Plasmonic color filtering has provided a range of new techniques for "printing" images at resolutions beyond the diffraction-limit, significantly improving upon what can be achieved using traditional, dye-based filtering methods. Here, a new approach to high-density data encoding is demonstrated using full color, dual-state plasmonic nanopixels, doubling the amount of information that can be stored in a unit-area. This technique is used to encode two data sets into a single set of pixels for the first time, generating vivid, near-full sRGB (standard Red Green Blue color space)color images and codes with polarization-switchable information states. Using a standard optical microscope, the smallest "unit" that can be read relates to 2 × 2 nanopixels (370 nm × 370 nm). As a result, dual-state nanopixels may prove significant for long-term, high-resolution optical image encoding, and counterfeit-prevention measures. over their microscale, dye-based counterparts. Chief among these are their subwavelength dimensions (leading to ultradense, ultrathin pixel arrays), and their long-term environmental stability (they do not degrade or fade over time due to radiation exposure). As a result, plasmonic filters have been positioned as new technological solutions for subwavelength color printing, [1,4,[7][8][9]12] anticounterfeiting measures, [19,20] and RGB splitting for image sensors; [2,17,21,22] thus representing one of the most promising, technologically relevant areas of current plasmonic research activity. Here, we explore a new application of polarizationcontrolled plasmonic filters: dual output, full-color optical image encoding. Recent developments in the engineering and manipulation of materials on the nanoscale have given rise to a number of new techniques with the potential for physically encoding data and images into optically readable volumes and surfaces. [23,24] Using semiconductor quantum dots, [25][26][27] graphene, [28] and various super-resolution lithography techniques, [29][30][31][32][33][34] researchers are demonstrating novel 2D and 3D techniques that may enable the next generation of optical storage and encoding technologies. Plasmonic particles and filters have also seen applications in these research areas, with the aforementioned image encoding examples having been joined by demonstrations of their use in optical data storage. [23,24,[35][36][37] Here, we show a new utilization of image encoding using polarization multiplexed plasmonic filters, where, unlike previous studies that employed color or position switching in fixed images, [14,38] we show that two arbitrary, full-color images can be encoded into a single array of pixels. Our individual pixels are comprised of asymmetric cross-shaped nanoapertures in a thin film of aluminum. Each aperture is engineered to exhibit two independent plasmonic resonances which can be tuned across the sRGB (standard Red Green Blue) color-space (a single pixel can be encoded with any two arbitrary colors). We go on to show that by using the smallest visible unit ...

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Plasmonic Nanoparticles as a Physically Unclonable Function for Responsive Anti‐Counterfeit Nanofingerprints

Cited by 140 publications

References 35 publications

Fluorescent Carbon‐ and Oxygen‐Doped Hexagonal Boron Nitride Powders as Printing Ink for Anticounterfeit Applications

Fluorescent Carbon‐ and Oxygen‐Doped Hexagonal Boron Nitride Powders as Printing Ink for Anticounterfeit Applications

Plasmonic Nanowire‐Enhanced Upconversion Luminescence for Anticounterfeit Devices

Plasmonic Color Filters as Dual‐State Nanopixels for High‐Density Microimage Encoding

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