Electrochemical SERS at Periodic Metallic Nanopyramid Arrays

Lin, Tzung-Hua; Linn, Nicholas C.; Tarajano, Lemis; Jiang, Bin; Jiang, Peng

doi:10.1021/jp809363m

Cited by 52 publications

(47 citation statements)

References 44 publications

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“…One example is nanosphere lithography, in which self-assembled arrays of spheres are used as masks to create regular structures such as discs, pyramids, sphere-segment voids and honeycomb structures of various metals [33,[51][52][53][54]. Other fabrication methods include electron beam lithography [55], focused ion beam methods [56], photolithography [57], and templating followed by electrodeposition [58,59].…”

Section: Direct Ec-sersmentioning

confidence: 99%

“…surface features associated with maximum electromagnetic enhancement [60,61]. Recent applications of EC-SERS at templated electrodes include the study of amino acid binding to copper [62], measurement of potential induced changes at biological membranes and biomimetic surfaces [63,64], and adsorption of pyridine [54]. The highly reproducibile enhancement factors associated with templated SERS electrodes makes them particularly suited to quantitative electrochemical detection.…”

Section: Direct Ec-sersmentioning

confidence: 99%

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Advances in surface-enhanced vibrational spectroscopy at electrochemical interfaces

Wain

O’Connell

2017

Advances in Physics: X

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Electrochemical interfaces are ubiquitous, and characterisation tools that allow us to interrogate them on the molecular scale underpin a wide range of technologies. Because of their dynamic nature, in situ or operando measurement is often necessary, and the coupling of electrochemical techniques with spectroscopic methods is a powerful solution to this challenge. Vibrational spectroscopy in particular can provide important insights into the chemical nature of species adsorbed at electrode surfaces. When combined with electrochemistry, the influence of a potential perturbation to the interface can be studied, helping to build a complete picture of molecular processes in complex electrochemical systems. Here, we review the latest advances in vibrational spectroscopy at electrochemical interfaces, with a focus on surfaceenhanced approaches including surface-enhanced Raman scattering, shell-isolated nanoparticle-enhanced Raman spectroscopy, tip-enhanced Raman spectroscopy and surface-enhanced infrared absorption spectroscopy.

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Section: Direct Ec-sersmentioning

confidence: 99%

Section: Direct Ec-sersmentioning

confidence: 99%

Advances in surface-enhanced vibrational spectroscopy at electrochemical interfaces

Wain

O’Connell

2017

Advances in Physics: X

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“…18 The surface-enhanced Raman scattering 19 (SERS) spectroscopy is widely used for gaining mechanistic and dynamic information on the electrode interfaces, [20][21][22] amplification of very weak signals generated from single molecules or from ultra short-lived transient species, single molecule detection and trace analysis. Several available reports 23,24 on electrochemical SERS studies indicated more or less success because of non-reproducible SERS signals caused by surface inhomogeneity. To the best of our knowledge, electrochemical SERS studies with microelectrodes have not hitherto been reported.…”

Section: Introductionmentioning

confidence: 99%

Development of Interdigitated Array Electrodes with Surface-enhanced Raman Scattering Functionality

et al. 2010

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“…[17][18][19][20][21] We have developed a scalable bottom-up technique for generating wafer-sized periodic gold nanopyramids with nanoscale tips as an efficient surface-enhanced Raman scattering substrate. [22][23][24] Here we demonstrate that the templated nanopyramids can also be utilized as sensitive SPR sensors for chemical and biological sensing. Finitedifference time-domain ͑FDTD͒ simulation has been conducted to complement the optical measurements.…”

mentioning

confidence: 77%

Nanopyramid surface plasmon resonance sensors

Chung

Lin

Schultz

et al. 2010

Applied Physics Letters

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We report the achievement of sensitive chemical and biological sensing using periodic gold nanopyramids with nanoscale sharp tips created by a simple and scalable colloidal templating approach. The sharp tips and the long-range periodic structure of the nanopyramid arrays enable the excitement of both localized and propagating surface plasmons. The optical reflection and the detection sensitivity of the templated nanopyramid surface plasmon resonance sensors agree reasonably well with the theoretical predictions using a finite-difference time-domain model. We have also demonstrated that specific antigen-antibody binding can be detected by using nanopyramid arrays in a real-time and label-free manner. © 2010 American Institute of Physics. ͓doi:10.1063/1.3460273͔Surface plasmon resonance ͑SPR͒ technique is of great importance for monitoring binding events in biological systems because it offers a direct and label-free platform for rapid screening test.1-7 Surface plasmons ͑SPs͒ are electromagnetic waves that propagate along a metal/dielectric interface and can be pictured as a traveling charge density wave on the surface of a metal. 8,9 The coupling of incident light with free electrons in metal forms SP waves that are essentially confined to the metal/dielectric interface, leading to a strong concentration of electromagnetic field. The adsorption of molecules to a metal surface significantly changes the oscillation of SPs, resulting in the modulation of light output. The modulation could be monitored by the angular distributions of reflection and transmission, wavelength, intensity, phase, and polarization changes. 1,10 Compared to other immunoassays, such as enzyme-linked immunosorbent assay and radioimmunoassay, 11 the SPR technique is highly promising for rapid and sensitive biosensing because the label-free and real-time characteristics of SPR sensors shorten the sample preparation time, minimize the interference of conjugating radioactive or enzyme labels, and enable direct analyte detection without a sandwich format. 1,2,12 To generate SPs, the difference in the momentum of incident light and SP must be compensated. 9 In the traditional Kretschmann configuration of the attenuated total reflection method, a prism is used to couple the incident light to SPs.10 However, the bulky experimental setup impedes miniaturization and integration in microfluidic systems. 13 The exploitation of localized SPR ͑LSPR͒ around metal nanoparticles is favorable for developing planar on-chip-based sensors.14-16 However, the stochastic separation between neighboring nanoparticles that significantly affects LSPR impedes the sensing reproducibility. Periodically patterned nanostructures, which support both localized and propagating SPR, therefore draw great attention due to their high reproducibility. [17][18][19][20][21] We have developed a scalable bottom-up technique for generating wafer-sized periodic gold nanopyramids with nanoscale tips as an efficient surface-enhanced Raman scattering substrate. [22][23][24] Here we demonst...

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Electrochemical SERS at Periodic Metallic Nanopyramid Arrays

Cited by 52 publications

References 44 publications

Advances in surface-enhanced vibrational spectroscopy at electrochemical interfaces

Advances in surface-enhanced vibrational spectroscopy at electrochemical interfaces

Development of Interdigitated Array Electrodes with Surface-enhanced Raman Scattering Functionality

Nanopyramid surface plasmon resonance sensors

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