Optical scattering investigation of a nonabsorbent silicon nanoparticles array

Moghadam, Fereshteh Rahimi

doi:10.1016/j.ijleo.2019.163477

Optik

2020

DOI: 10.1016/j.ijleo.2019.163477

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Optical scattering investigation of a nonabsorbent silicon nanoparticles array

Fereshteh Rahimi Moghadam

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Cited by 2 publications

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“…This technology not only requires miniaturization of information carriers but also demands accurate information expression with high resolution. Plasmonic nanoparticles (NPs) are characterized by large optical cross sections , and unique photostability . Their localized surface plasmon resonance (LSPR) largely depends on the components, size, dielectric environment, aggregation state, etc., which allow plasmonic NPs to be ideal optical information carriers.…”

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confidence: 99%

Antielectric Potential Synthesis of Plasmonic Au–Ag Multidimensional Dimers Array for High-Resolution Encrypted Information

Zeng,

Yang,

Chen

et al. 2024

Nano Lett.

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Plasmonic superstructures hold great potential in encrypted information chips but are still unsatisfactory in terms of resolution and maneuverability because of the limited fabrication strategies. Here, we develop an antielectric potential method in which the interfacial energy from the modification of 5-amino-2-mercapto benzimidazole (AMBI) ligand is used to overcome the electric resistance between the Au nanospheres (NSs) and substrate, thereby realizing the in situ growth of a Au−Ag heterodimers array in large scale. The morphology, number, and size of Ag domains on Au units can be controlled well by modulating the reaction kinetics and thermodynamics. Experiments and theoretical simulations reveal that patterned 3D Au−2D Ag and 3D Au−3D Ag dimer arrays with line widths of 400 nm exhibit cerulean and cyan colors, respectively, and achieve fine color modulation and ultrahigh information resolution. This work not only develops a facile strategy for fabricating patterned plasmonic superstructures but also pushes the plasmon-based highresolution encrypted information chip into more complex applications.

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mentioning

confidence: 99%

Antielectric Potential Synthesis of Plasmonic Au–Ag Multidimensional Dimers Array for High-Resolution Encrypted Information

Zeng,

Yang,

Chen

et al. 2024

Nano Lett.

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SERS and RI sensing properties of heterogeneous dimers of Au and Si nanospheres

Chen

et al. 2021

Mod. Phys. Lett. B

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Heterogeneous dimers of Au and Si nanoparticles are expected to exhibit different plasmon properties from that of homogeneous noble metal nanoparticle dimers. It is crucial to unveil the potential applications in surface-enhanced Raman scattering (SERS) and refractive-index (RI) sensing of the prototype dimer of Au and Si nanospheres. The near-field coupling between the two components within the dimer is revealed to not affect the resonance energy of Si mode in the extinction spectra, but decrease that of Au mode. It also accounts for the plasmon ruler behavior of the fractional shifts of both its dipolar peak wavelength of localized surface plasmon resonance (LSPR) and corresponding RI sensitivity factor [Formula: see text], which provide another kind of substitute to estimate the gap distance in between components within the dimer as that of noble metal nanoparticle dimers. Additionally, by tracking the inflection point shift of the corresponding extinction spectra, its [Formula: see text] is revealed to improve 36% than that of traditional one. The maximum [Formula: see text] and SERS enhancement factor [Formula: see text] at 2 nm gap distance are demonstrated to reach 336 nm RIU[Formula: see text] and [Formula: see text], respectively. This work paves a new way for developing efficient SERS and RI sensing substrates by combining noble metal and dielectric nanoparticles.

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Optical scattering investigation of a nonabsorbent silicon nanoparticles array

Cited by 2 publications

References 21 publications

Antielectric Potential Synthesis of Plasmonic Au–Ag Multidimensional Dimers Array for High-Resolution Encrypted Information

Antielectric Potential Synthesis of Plasmonic Au–Ag Multidimensional Dimers Array for High-Resolution Encrypted Information

SERS and RI sensing properties of heterogeneous dimers of Au and Si nanospheres

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