Silver Coated Porous Alumina as a New Substrate for Surface-Enhanced Raman Scattering

Walsh, Richard J.; Chumanov, George

doi:10.1366/0003702011954035

Cited by 48 publications

(32 citation statements)

References 25 publications

(16 reference statements)

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“…However, in the case of silver films, we observed a reduction of the surface enhancement by a factor of 3-4 per cleaning/incubation cycle. 14 This result is at variance with a report in the literature 32 and could be related to the details of the cleaning procedure.…”

Section: Plasma Cleaning Of the Roughened Metal Films For Repeated Usementioning

confidence: 88%

Preparation of SERS‐active gold film electrodes via electrocrystallization: their characterization and application with NIR excitation

Sauer

Brehm

Schneider

2004

J Raman Spectroscopy

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The electrodeposition of a sufficiently large amount of gold on vapor-deposited film electrodes at high overpotentials leads to excellent substrates for surface-enhanced Raman scattering (SERS) spectroscopy. The SERS enhancement factor is estimated to be >10 7 with near-infrared excitation, a value which is superior to that for gold surfaces roughened by conventional oxidation-reduction cycles. Its wavelength dependence was studied over a wide range of excitation wavelengths and compared with that of silver electrodes prepared in an analogous manner. Furthermore, the broad applicability of the SERS-active gold film electrodes was demonstrated using numerous environmentally relevant s-triazine derivatives containing amino and/or thioether groups as probe molecules. Finally, it is shown that the high stability of the roughened gold surfaces allows even strongly adsorbed molecules to be removed by plasma cleaning without distinctly altering the SERS enhancement factor. First results allow the conclusion that this type of SERS-active surfaces is well suited for their repeated use.

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Section: Plasma Cleaning Of the Roughened Metal Films For Repeated Usementioning

confidence: 88%

Preparation of SERS‐active gold film electrodes via electrocrystallization: their characterization and application with NIR excitation

Sauer

Brehm

Schneider

2004

J Raman Spectroscopy

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“…High aspect ratio nanostructures have been fabricated using lithographic techniques such as electron beam lithography (EBL) [33], nanosphere lithography (NSL) [34], as well as other approaches such as template [35] and hybrid methods [36]. SERS-active substrates produced by EBL consist of an array of highly ordered structures produced by a focused beam of electrons capable of drawing patterns over the resist wafer in a serial manner with nanometer resolution.…”

Section: Effective Sers-active Substratesmentioning

confidence: 99%

Ag nanorod based surface‐enhanced Raman spectroscopy applied to bioanalytical sensing

Negri

Dluhy

2012

Journal of Biophotonics

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Recent progress in substrate nanofabrication has led to the development of Ag nanorod arrays as uniform, reproducible, large area SERS-active substrates with high signal enhancement. These novel nanostructures fabricated by oblique angle vapor deposition (OAD) offer a robust platform for the rapid detection of biological agents and open new perspectives for the development and integration of biomedical diagnostic for clinical and therapeutic applications. Ag nanorod arrays have been investigated as SERS-active substrates for the detection and identification of pathogens, including bacteria and viruses, as well as to evaluate the potential of this biosensing platform for bio-recognition of high affinity events using oligonucleotide-modified substrates. This review summarizes the various nanostructured substrates designed for SERS-based applications, highlights the nanofabrication methodology used to produce Ag nanorod arrays, outlines their morphological and physical properties, and provides a summary of the most recent uses of these substrates for clinical diagnostic and biomedical applications.

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“…Prior works on 2D-ordered arrays of nanoholes, 18,19 and nanorings 20 with deposition of single layered gold or silver demonstrated the applicable SERS effect. Patterning the ordered arrays with z E-mail: ckchung@mail.ncku.edu.tw the silver metal coating on the substrate for the SERS application could be performed by high vacuum DC magnetron sputtering, 21,22 plasmon excitation, 23,24 laser molecular beam epitaxy, 25 and E-beam evaporation. 26 The porous anodic aluminum oxide (AAO) was a popular template for the SERS substrate by depositing thermally evaporated silver nanoparticles on to form a 2-D periodic metal nanoparticle arrays after the remaining aluminum was removed.…”

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confidence: 99%

Enhancement of Surface Raman Spectroscopy Performance by Silver Nanoparticles on Resin Nanorods Arrays from Anodic Aluminum Oxide Template

Chung

2017

J. Electrochem. Soc.

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The surface enhanced Raman spectroscopy (SERS) substrates were fabricated by many methods including the AAO molding and high-cost nanolithography-etching-deposition process. In this article, we have demonstrated the SERS substrate fabricated with silver nanoparticles (Ag-NP) electroless deposition on highly ordered dense hexagonal arrays of UV curable resin nanorods (R-NR) arrays which was reproducible from a precisely controlled anodic aluminum oxide (AAO) template. This method could improve the non-flatness induced defect problem in the conventional nanoimprinting technique and form high-quality duplications of nanometer templates. The periodic hierarchical double-structured nanorods arrays with small nanorods (diameter about 30∼40 nm) in large nanorods (diameter about 100∼110 nm) were obtained by the UV curable resins molding from the AAO template. Two kinds of electroless deposition i.e. self-assembly and ultrasonic vibration methods were performed for Ag-NP formation on R-NR. The enhancement factors of SERS using 10 −5 M methylene blue (MB) as probing molecules were 10 4 ∼10 6 for the self-assembled method and 10 5 ∼10 7 for the ultrasonic vibration one, respectively. This was because the ultrasonic vibration deposition could result in Ag nanorods arrays with higher regularity and contact area than the self-assembly one. A variety of methods have been used to fabricate metallic, ceramic and polymer nanostructures due to the rapid growth of nanofabrication technology that can be classified into two basic categories of top-down and bottom-up approaches. The top-down approaches such as photolithography, 1 focus ion beam, 2 and nanoimprint 3 offered high fidelity and high controllability in terms of design and prediction. However, top-down approaches were generally low throughput and needed expensive instruments. On the other hand, the bottom-up approaches based on self-assembly, such as nanosphere lithography, 4,5 and block copolymer lithography 6 could produce high resolution nanostructures over a large area at low cost but it was difficult to obtain highly uniform and controllable structures of arbitrary symmetries across the whole area. Surface enhanced Raman spectroscopy (SERS) was a useful analytic technique in the food, 4,7,8 chemical molecules, 9,10 and ion detection 11 applications which could provide the detailed information of materials under investigation at the molecular level. The areas with greatly enhanced electromagnetic field became "hot spots" for SERS 12,13 which utilized the field enhancement property of metal nanostructures to amplify the normally weak Raman scattering signals. Different materials and structures were investigated to use as SERS substrates. The preparation of metallic nanostructures with superior SERS performances was one of the main topics in the SERS field and important for sensing and analysis. Currently, SERS have drawn more attentions and made great progress using nanotechnology. Different geometry of nanoflowers 14,15 and nanoparticles 16,17 were used to enhance Raman...

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Silver Coated Porous Alumina as a New Substrate for Surface-Enhanced Raman Scattering

Cited by 48 publications

References 25 publications

Preparation of SERS‐active gold film electrodes via electrocrystallization: their characterization and application with NIR excitation

Preparation of SERS‐active gold film electrodes via electrocrystallization: their characterization and application with NIR excitation

Ag nanorod based surface‐enhanced Raman spectroscopy applied to bioanalytical sensing

Enhancement of Surface Raman Spectroscopy Performance by Silver Nanoparticles on Resin Nanorods Arrays from Anodic Aluminum Oxide Template

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