Nanostructured Au/Si substrate for organic molecule SERS detection

Ignat, Teodora; Vázquez-Muñoz, Roberto; Kleps, I.; Obieta, Isabel; Miu, M.; Simion, Monica; Iovu, M.

doi:10.1016/j.spmi.2009.07.019

Cited by 18 publications

(14 citation statements)

References 17 publications

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“…We believe this effect is due to a trade‐off between the amount of light that can couple into the pit (low for small angles) and localisation (which decreases for large angles). It is interesting to note that the predicted enhancement of 1.65 (or 1.35 along the pit walls) is comparable to that determined by Ignat et al 37 for their new microporous silicon gold SERS substrate, which has a 1.25–1.5 times stronger SERS signal than a standard Klarite pit.…”

Section: Em Enhancement and Its Dependence On Pit Anglementioning

confidence: 99%

Physical mechanisms behind the SERS enhancement of pyramidal pit substrates

Vernon

Davis

Scholes

et al. 2010

J Raman Spectroscopy

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In this paper we theoretically consider the physical mechanisms behind the surface-enhanced Raman scattering (SERS) enhancement produced by commercially available Klarite substrates, which consist of rectangular arrays of micrometre-sized pyramidal pits in silicon with a thin gold coating. Full three-dimensional numerical simulations of the pits are conducted for both a real gold metal coating and a perfect electrical conductor (PEC) to determine whether the SERS enhancement is due to diffraction or plasmon effects. The pit apex angle and metal coating thickness are also varied to determine whether it is possible to further enhance the SERS signal by optimising the structural parameters of these substrates. By decreasing the film thickness and adjusting the apex angle, it is possible to achieve an enhancement almost double that of a standard Klarite substrate.

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Section: Em Enhancement and Its Dependence On Pit Anglementioning

confidence: 99%

Physical mechanisms behind the SERS enhancement of pyramidal pit substrates

Vernon

Davis

Scholes

et al. 2010

J Raman Spectroscopy

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“…8 It is well known that the self-aggregation of the evaporated Ni film on Si substrates allows it to function as the etching mask for the fabrication of high-aspect-ratio Si nanostructures, as well as Al, Au, and Ag. 9,10 Furthermore, J. Zhu et al 11 employed a Ni-nanodot mask to fabricate GaN-based nanopillar light-emitting diodes. However, the preparation of Ni nanodots on Si substrates still has some limitations.…”

Section: Introductionmentioning

confidence: 99%

Feasible method to fabricate a nickel-nanodot mask on a silicon substrate with conventional thermal annealing

Xiao¹,

Tian²,

Guo³

et al. 2018

Mater. Tehnol.

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In this paper, a simple and feasible method to fabricate a Ni-nanodot mask on a silicon substrate is reported. Without using a high-cost rapid thermal annealing (RTA) furnace, this method was based on the conventional thermal annealing of a Ni layer deposited on a Si substrate. In addition, the influences of the Ni-layer thickness and annealing conditions on the size and density of the Ni nanodots were systematically investigated. The as-prepared Ni nanodots were well distributed, having a uniform size and a regular spherical shape. Moreover, a Si nanopillar array could be fabricated by inductively coupled plasma (ICP) etching using the as-obtained Ni-nanodot array mask.

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“…To overcome this, in recent years, many studies have been conducted to develop alternate cost effective SERS substrates using wide range of materials, surface morphology, and fabrication techniques. Some of the substrates and the fabrication techniques include gold-coated nanorod arrays fabricated by depositing silicon nanorod arrays onto a silicon and a glass substrate [ 3 ], self-assembled gold and silver nanorod arrays [ 4 ], nanostructured macroporous silicon substrates [ 5 ], arrays of gold nanoparticles and nanotriangles [ 6 ], silver-plated porous silicon [ 7 ], and ZnO/Au composite nanoarrays [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Pore Size and Film Thickness on Gold-Coated Nanoporous Anodic Aluminum Oxide Substrates for Surface-Enhanced Raman Scattering Sensor

Kassu

Farley

Sharma

et al. 2015

Sensors

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A sensitive surface enhanced Raman scattering chemical sensor is demonstrated by using inexpensive gold-coated nanoporous anodic aluminum oxide substrates. To optimize the performance of the substrates for sensing by the Surface-enhanced Raman scattering (SERS) technique, the size of the nanopores is varied from 18 nm to 150 nm and the gold film thickness is varied from 30 nm to 120 nm. The sensitivity of gold-coated nanoporous surface enhanced Raman scattering sensor is characterized by detecting low concentrations of Rhodamine 6G laser dye molecules. The morphology of the SERS substrates is characterized by atomic force microscopy. Optical properties of the nanoporous SERS substrates including transmittance, reflectance, and absorbance are also investigated. Relative signal enhancement is plotted for a range of substrate parameters and a detection limit of 10−6 M is established.

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Nanostructured Au/Si substrate for organic molecule SERS detection

Cited by 18 publications

References 17 publications

Physical mechanisms behind the SERS enhancement of pyramidal pit substrates

Physical mechanisms behind the SERS enhancement of pyramidal pit substrates

Feasible method to fabricate a nickel-nanodot mask on a silicon substrate with conventional thermal annealing

Effect of Pore Size and Film Thickness on Gold-Coated Nanoporous Anodic Aluminum Oxide Substrates for Surface-Enhanced Raman Scattering Sensor

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