Designer Plasmonic Nanostructures for Unclonable Anticounterfeit Tags

Ibrar, Maha; Skrabalak, Sara E.

doi:10.1002/sstr.202100043

Cited by 20 publications

(14 citation statements)

References 61 publications

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“…Furthermore, the characteristic scattering images of plasmonic nanostructures collected by dark-field microscopy have been considered as a highly promising way for color display and information encryption, which requires the diversity of nanostructures and the richness of their colors. [20,39,[63][64][65] Herein, flexible color modulation can be achieved through utilizing the remarkable low-energy longitudinal bonding dipole plasmon mode of organized nanostructures. [33] Figure 6a displays the energy-level diagram of the longitudinal bonding coupling between Au NPs and Ag NP.…”

Section: Specific Calculations Of φðφmentioning

confidence: 99%

Programmable Assembly of Colloidal Nanoparticles Controlled by Electrostatic Potential Well

et al. 2022

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Compared with the individual colloidal nanoparticles, programmable nanoassemblies with well‐defined configurations exhibit more prominent coupling effects and collective behaviors. The full realization of the unique superiority of these nano assemblies requires the development of feasible approaches to assemble colloidal nanoparticles into an organized nanostructure on substrates, which remains a major challenge in nanotechnology at present. Herein, a facile strategy is developed to programmatically design diversified nanostructures through the rational capture of nanoparticles with flexibly adjustable particle types, including their sizes, shapes, or components. Importantly, such a strategy takes advantage of a bowl‐shaped electrostatic potential well that forms based on the combination of a positively charged nanoparticle and a negatively charged substrate, where theory and simulation are employed to reveal the notable role of the substrate potential. As a demonstration, a series of nanostructures with customized geometries and locations have been successfully fabricated, especially the asymmetric dimer structures, which bring about distinct localized surface plasmon resonance hybridization and coupling effects. Therefore, the joint computational–experimental showcase paves the way toward the preparation of ideal nanostructures, providing valuable insight into the development of optical encryption, smart sensing, sensitive bio‐detection, and so on.

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Section: Specific Calculations Of φðφmentioning

confidence: 99%

Programmable Assembly of Colloidal Nanoparticles Controlled by Electrostatic Potential Well

et al. 2022

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“…Compared with the existing concepts of unclonable labels based on plasmonic nanoparticles, ,, the proposed system has a number of distinctive features that can play a key role for some applications in real life.…”

Section: Discussionmentioning

confidence: 99%

Mie-Resonant Silicon Nanoparticles for Physically Unclonable Anti-Counterfeiting Labels

Kustov

Petrova

Nazarov

et al. 2022

ACS Appl. Nano Mater.

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Security labels produced by nondeterministic processes are a promising platform to shield counterfeiting. Here, we demonstrate the design of a physically unclonable anticounterfeiting label made of clusters of Mie-resonant silicon nanoparticles (NPs) fabricated by the laser-induced forward transfer technique. The number and relative position of clusters form the first security level authenticated by a smartphone with a macro lens. The enhanced optical response from the resonant NPs provides an opportunity to create additional laboratory security levels. These levels are based on spatial and chromatic coordinates as well as NP crystallinity, generating unique cluster fingerprints. The K-means clustering method utilized for the NP dark-field image processing makes it possible to achieve an encoding capacity of 10240000 for a 1000 × 500 pixel image. The widespread material, high-throughput fabrication, and multilevel security make a perfect set for label application in security and tracking of different items from consumer goods to art objects.

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“…[ 8 ] This stochasticity and inherently random responses prevent the replication of encoded surfaces by third parties or even by the manufacturer itself. [ 9 ] Starting from the seminal work by Pappu et al., [ 6 ] optical PUF systems have been an active research area. [ 10–17 ] In the past decade, a range of material types and manufacturing routes have been studied to demonstrate PUFs using silica microparticles, [ 6 ] inherent randomness of surfaces, [ 18,19 ] randomly positioned scatterers challenged by quantum states of light, [ 20,21 ] carbon nanotubes, [ 22 ] spherical [ 23,24 ] and rod shaped [ 25 ] plasmonic nanoparticles, silver nanoislands, [ 26 ] core‐shell nanoparticles, [ 27 ] polymeric particles, [ 28 ] diamonds, [ 29 ] and fluorescent compounds.…”

Section: Introductionmentioning

confidence: 99%

“…[8] This stochasticity and inherently random responses prevent the replication of encoded surfaces by third parties or even by the manufacturer itself. [9] Starting from the seminal work by Pappu et al, [6] optical PUF systems have been an active research area. [10][11][12][13][14][15][16][17] In the past decade, a range of material types and manufacturing routes have been studied to demonstrate PUFs using silica microparticles, [6] inherent randomness of surfaces, [18,19] randomly positioned scatterers challenged by quantum states of…”

mentioning

confidence: 99%

Organic Light‐Emitting Physically Unclonable Functions

Kayacı

Özdemir

Kalay

et al. 2021

Adv Funct Materials

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The development of novel physically unclonable functions (PUFs) is of growing interest and fluorescent organic semiconductors (f‐OSCs) offer unique advantages of structural versatility, solution‐processability, ease of processing, and great tuning ability of their physicochemical/optoelectronic/spectroscopic properties. The design and ambient atmosphere facile fabrication of a unique organic light‐emitting physically unclonable function (OLE‐PUF) based on a green‐emissive fluorescent oligo(p‐phenyleneethynylene) molecule is reported. The OLE‐PUFs have been prepared by one‐step, brief (5 min) thermal annealing of spin‐coated nanoscopic films (≈40 nm) at a modest temperature (170 °C), which results in efficient surface dewetting to form randomly positioned/sized hemispherical features with bright fluorescence. The random positioning of molecular domains generated the unclonable surface with excellent uniformity (0.50), uniqueness (0.49), and randomness (p > 0.01); whereas the distinctive photophysical and structural properties of the molecule created the additional security layers (fluorescence profile, excited‐state decay dynamics, Raman mapping/spectrum, and infrared spectrum) for multiplex encoding. The OLE‐PUFs on substrates of varying chemical structures, surface energies and flexibility, and direct deposition on goods via drop‐casting are demonstrated. The OLE‐PUFs immersed in water, exposed to mechanical abrasion, and read‐out repeatedly via fluorescence imaging showed great stability. These findings clearly demonstrate that rationally engineered solution‐processable f‐OSCs have a great potential to become a key player in the development of new‐generation PUFs.

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Designer Plasmonic Nanostructures for Unclonable Anticounterfeit Tags

Cited by 20 publications

References 61 publications

Programmable Assembly of Colloidal Nanoparticles Controlled by Electrostatic Potential Well

Programmable Assembly of Colloidal Nanoparticles Controlled by Electrostatic Potential Well

Mie-Resonant Silicon Nanoparticles for Physically Unclonable Anti-Counterfeiting Labels

Organic Light‐Emitting Physically Unclonable Functions

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