Nucleation and Growth-Controlled Facile Fabrication of Gold Nanoporous Structures for Highly Sensitive Surface-Enhanced Raman Spectroscopy Applications

Lee, Eunji; Ryu, Sangwoo

doi:10.3390/nano11061463

Cited by 3 publications

(2 citation statements)

References 42 publications

(43 reference statements)

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“…[39] Multiple strategies have been developed to generate high-sensitivity SERS surfaces, such as the use of gold nanostars, [40,41] silver nanostructures, [42] or nanoporous gold. [43,44] More recently, wrinkled surfaces have emerged as excellent alternatives to generate SERS surfaces, given that the high curvature crest of the wrinkles serve as hot-spots for SERS detection. [45] Most of the wrinkled films for SERS applications have focused on silver as material of choice; however, silver is not suitable for electrochemical detection.…”

Section: Performance Of Nr-mses For Surface-enhanced Raman Scatteringmentioning

confidence: 99%

Benchtop Fabricated Nano‐Roughened Microstructured Electrodes for Electrochemical and Surface‐Enhanced Raman Scattering Sensing

González‐Martínez,

Beganovic,

Moran‐Mirabal

2024

Small Methods

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Tailoring a material's surface with hierarchical structures from the micro‐ to the nanoscale is key for fabricating highly sensitive detection platforms. To achieve this, the fabrication method should be simple, inexpensive, and yield materials with a high density of surface features. Here, using benchtop fabrication techniques, gold surfaces with hierarchically structured roughness are generated for sensing applications. Hierarchical gold electrodes are prepared on pre‐stressed polystyrene substrates via electroless deposition and amperometric pulsing. Electrodes fabricated using 1 mm H[AuCl₄] and roughened with 80 pulses revealed the highest electroactive surface area. These electrodes are used for enzyme‐free detection of glucose in the presence of bovine serum albumin and achieved a limit of detection of 0.36 mm, below glucose concentrations in human blood. The surfaces nanoroughened with 100 pulses also showed excellent surface‐enhanced Raman scattering (SERS) response for the detection of rhodamine 6G, with an enhancement factor of ≈2 × 106 compared to detection in solution, and for the detection of a self‐assembled monolayer of thiophenol, with an enhancement factor of ≈30 compared to the response from microstructured gold surfaces. It is envisioned that the simplicity and low fabrication cost of these gold‐roughened structures will expedite the development of electrochemical and SERS sensing devices.

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Section: Performance Of Nr-mses For Surface-enhanced Raman Scatteringmentioning

confidence: 99%

Benchtop Fabricated Nano‐Roughened Microstructured Electrodes for Electrochemical and Surface‐Enhanced Raman Scattering Sensing

González‐Martínez,

Beganovic,

Moran‐Mirabal

2024

Small Methods

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“…59 Several methods for fabrication gap plasmon nanostructures are known: (1) placement of a metal nanoparticle (nanosphere, nanocube) near a metal surface, 60,61 (2) planar nanostructures made by electron lithography, 62 (3) nanogaps in thin metal films. 63,64 Each of the methods has its own advantages and disadvantages. In this work, we used the approach tested in ref.…”

Section: Atomic Sized Ag Clusters Inside Of Resonatormentioning

confidence: 99%

Ultra-bright and narrow-band emission from Ag atomic sized nanoclusters in a self-assembled plasmonic resonator

et al. 2022

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Controllable Preparation of Gold Nanocrystals with Different Porous Structures for SERS Sensing

Qin

Fang

et al. 2023

Molecules

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Porous Au nanocrystals (Au NCs) have been widely used in catalysis, sensing, and biomedicine due to their excellent localized surface plasma resonance effect and a large number of active sites exposed by three-dimensional internal channels. Here, we developed a ligand-induced one-step method for the controllable preparation of mesoporous, microporous, and hierarchical porous Au NCs with internal 3D connecting channels. At 25 °C, using glutathione (GTH) as both a ligand and reducing agent combined with the Au precursor to form GTH–Au(I), and under the action of the reducing agent ascorbic acid, the Au precursor is reduced in situ to form a dandelion-like microporous structure assembled by Au rods. When cetyltrimethylammonium bromide (C16TAB) and GTH are used as ligands, mesoporous Au NCs formed. When increasing the reaction temperature to 80 °C, hierarchical porous Au NCs with both microporous and mesoporous structures will be synthesized. We systematically explored the effect of reaction parameters on porous Au NCs and proposed possible reaction mechanisms. Furthermore, we compared the SERS-enhancing effect of Au NCs with three different pore structures. With hierarchical porous Au NCs as the SERS base, the detection limit for rhodamine 6G (R6G) reached 10−10 M.

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Nucleation and Growth-Controlled Facile Fabrication of Gold Nanoporous Structures for Highly Sensitive Surface-Enhanced Raman Spectroscopy Applications

Cited by 3 publications

References 42 publications

Benchtop Fabricated Nano‐Roughened Microstructured Electrodes for Electrochemical and Surface‐Enhanced Raman Scattering Sensing

Benchtop Fabricated Nano‐Roughened Microstructured Electrodes for Electrochemical and Surface‐Enhanced Raman Scattering Sensing

Ultra-bright and narrow-band emission from Ag atomic sized nanoclusters in a self-assembled plasmonic resonator

Controllable Preparation of Gold Nanocrystals with Different Porous Structures for SERS Sensing

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