Surface-enhanced Raman scattering active gold nanoparticle/nanohole arrays fabricated through electron beam lithography

Wu, Tsunghsueh; Lin, Yu‐Liang

doi:10.1016/j.apsusc.2017.11.213

Cited by 64 publications

(25 citation statements)

References 39 publications

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“…192,193 While top-down synthetic methods of SERS substrates, such as electron beam lithography and focused-ion beam lithography, are capable of producing highly reproducible materials, the high cost and limited tunability, as well as inability to synthesize anisotropic AuNPs make them less attractive than bottom-up methods. [194][195][196] However, the use of such AuNP in SERS-based applications may require "sandwich architecture"; nanoparticles are positioned such there a narrow gap between them and a plasmonic film allowing for realization of the quantum confinement effect. 197,198 Indrasekara et al recognized and sought to improve on the disadvantages of the "sandwich architecture"; primarily a limit on the sensitivity of the application.…”

Section: Miscellaneous Shapesmentioning

confidence: 99%

Bespoke nanostars: synthetic strategies, tactics, and uses of tailored branched gold nanoparticles

Siegel

Baker

2021

Nanoscale Adv.

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Section: Miscellaneous Shapesmentioning

confidence: 99%

Bespoke nanostars: synthetic strategies, tactics, and uses of tailored branched gold nanoparticles

Siegel

Baker

2021

Nanoscale Adv.

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“…High-quality anisotropic Ag nanostructures can be obtained through many methods, including photolithography and template growth from electrodeposition, in which the surface roughness of Ag nanostructure can be precisely controlled during fabrication to yield a greatly enhanced SERS signal for highly sensitive detection of brilliant cresyl blue, benzenethiol, and adenine [ 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. Both photolithography and template growth from electrodeposition require sophisticated surface patterning steps and a time-consuming bottom-up approach to build nanostructures on the substrate.…”

Section: Introductionmentioning

confidence: 99%

Dendritic Forest-Like Ag Nanostructures Prepared Using Fluoride-Assisted Galvanic Replacement Reaction for SERS Applications

Shiao

Huang

et al. 2021

Nanomaterials

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Dendritic forest-like Ag nanostructures were deposited on a silicon wafer through fluoride-assisted galvanic replacement reaction (FAGRR) in aqueous AgNO3 and buffered oxide etchant. The prepared nanostructures were characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy, inductively coupled plasma–optical emission spectroscopy, a surface profiler (alpha step), and X-ray diffraction. Additionally, the dendritic forest-like Ag nanostructures were characterized using surface-enhanced Raman scattering (SERS) when a 4-mercaptobenzoic acid (4-MBA) monolayer was adsorbed on the Ag surface. The Ag nanostructures exhibited intense SERS signal from 4-MBA because of their rough surface, and this intense signal led to an intense local electromagnetic field upon electromagnetic excitation. The enhancement factor for 4-MBA molecules adsorbed on the Ag nanostructures was calculated to be 9.18 × 108. Furthermore, common Raman reporters such as rhodamine 6G, 4-aminothiolphenol, 5,5′-dithiobis-2-nitrobenzoic acid, and carboxyfluorescein (FAM) were characterized on these dendritic forest-like Ag nanostructures, leading to the development of an ultrasensitive SERS-based DNA sensor with a limit of detection of 33.5 nM of 15-mer oligonucleotide.

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“…Generation of nanosized structures is technologically important, and the controlled formation of structures in solids on a nanometer scale is critical to modern technology [1][2][3]. Such structures may have properties different from those of the bulk materials.…”

Section: Introductionmentioning

confidence: 99%

Self-Organized Nanostructures Generated on Metal Surfaces under Electron Irradiation

Niwase¹

2021

QuBS

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Irradiation of high-energy electrons can produce surface vacancies on the exit surface of thin foils by the sputtering of atoms. Although the sputtering randomly occurs in the area irradiated with an intense electron beam of several hundred nanometers in diameter, characteristic topographic features can appear under irradiation. This paper reviews a novel phenomenon on a self-organization of nanogrooves and nanoholes generated on the exit surface of thin metal foils irradiated with high doses of 360–1250 keV electrons. The phenomenon was discovered firstly for gold irradiated at temperatures about 100 K, which shows the formation of grooves and holes with widths between 1 and 2 nm. Irradiation along [001] produces grooves extending along [100] and [010], irradiation along [011] gives grooves along [100], whereas no clear grooves have been observed for [111] irradiations. By contrast, nanoholes, which may reach depths exceeding 20 nm, develop mainly along the beam direction. The formation of the nanostructures depends on the irradiation temperatures, exhibiting an existence of a critical temperature at about 240 K, above which the width significantly increases, and the density decreases. Nanostructures formed for silver, copper, nickel, and iron were also investigated. The self-organized process was discussed in terms of irradiation-induced effects.

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Surface-enhanced Raman scattering active gold nanoparticle/nanohole arrays fabricated through electron beam lithography

Cited by 64 publications

References 39 publications

Bespoke nanostars: synthetic strategies, tactics, and uses of tailored branched gold nanoparticles

Bespoke nanostars: synthetic strategies, tactics, and uses of tailored branched gold nanoparticles

Dendritic Forest-Like Ag Nanostructures Prepared Using Fluoride-Assisted Galvanic Replacement Reaction for SERS Applications

Self-Organized Nanostructures Generated on Metal Surfaces under Electron Irradiation

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