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

Islam, Md. Monirul; Ueno, Kosei; Juodkazis, Saulius; Yokota, Yukie; Misawa, Hiroaki

doi:10.2116/analsci.26.13

Cited by 23 publications

(14 citation statements)

References 40 publications

(30 reference statements)

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“…[34][35][36][37] The ability to effectively manipulate objects down to single molecules 7, 29, 38-42 is adding new functionality to surface enhanced Raman scattering (SERS), 40,42 superresolution microscopy, 29, 42 nano-manipulation, 41 and fostering the discovery of new fundamental phenomena like optical pulling. 39,43 Micro-optics fabricated by femtosecond laser will be able to harness angular momentum of light and open novel avenues in microfluidics applications.…”

Section: Discussionmentioning

confidence: 99%

Fabrication of nanoparticles for generation of force and torque at nanoscale

et al. 2013

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Chiral patterns are created by focused ion-beam milling nano-grooves with sub-15 nm resolution on thin metal films and arrays of nanoparticles, scattering and absorbing light selectively for left and right circularly polarized light, with high fidelity over fields up to 100 x 100 mu m(2) without positioning errors. This allows to carry out numerical simulations to estimate light enhancement and circular dichroism both on ideal and realistic particles taken from SEM images, showing doubling of scattering cross-section and enhancement changes up to 5 times controlled by dichroism, with localized field enhancements up to 20000. 3D plasmonic structures extending out of a gold film plane are created by dry etching of the film in the openings of a resist mask defined by electron beam lithography. Conical vertical protrusions (nano-wells) are left, and their optical properties are numerically simulated, showing easily reachable out-of-plane trapping of both dielectric and metal plasmonic nano-spheres, with trapping forces up to 20 pN/W/mu m(2). Wideband refractive index spectra in 3D-FDTD are correctly represented by overcoming the polynomial approximations to give accurate field and force/torque results for generalized artificial materials

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Section: Discussionmentioning

confidence: 99%

Fabrication of nanoparticles for generation of force and torque at nanoscale

et al. 2013

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“…Recently, we have reported 21 a potential and redox cycling dependent SERS of the ferri/ferrocyanide reversible redox couple at similar nanostructured IDA electrodes, where the SERS intensity in the GC mode was higher than that in the S mode at the negative end of the applied potential, but was not observed to exceed the value of the initial potential. The number of the redox cycling and collection efficiency calculated from the SERS intensity was in accordance to that it was calculated from the electrochemical currents, and the amplification of the SERS intensity attributed to a redox cycling mechanism.…”

Section: Potential and Inter-electrode Spacing Dependent Sers Signalsmentioning

confidence: 94%

“…The details of electrode fabrication are reported elsewhere. 19,21,22 The design, layout and SEM images of the electrodes are shown in Fig. 1.…”

Section: Electrode Fabricationmentioning

confidence: 99%

“…The nanogaps generated between vertexes of nanoblocks are those particular locations where local field enhancement takes place and optical linear as well as nonlinear effects are enhanced. It has been reported 21 that the fabricated electrodes show two optical extinction peaks at λ1 = 595 nm and λ2 = 784 nm into water with a strong electric-field enhancement (~10 4 times relative to incident light), particularly at the nanogap positions.…”

Section: Electrode Fabricationmentioning

confidence: 99%

“…13,20 Nanostructured IDA electrodes with a narrower inter-electrode spacing are effective for detecting short-lived electroactive species and following the kinetics and dynamics of quasi-reversible or irreversible electrochemical reactions because the reactive or unstable products/intermediates can be collected to the adjacent electrodes before dissociation into other stable products, or involved in secondary homogeneous chemical reactions. Recently, we have developed 21 nanostructured IDA electrodes with SERS functionality using a high-precision electron beam lithography (EBL) combination with a lift-off technique, and successfully applied to an electrochemical SERS study of a ferri/ferrocyanide system in aqueous KClO4. The results showed a strong correlation between the number of redox cycling and the collection efficiency derived from the redox current and the SERS intensity, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Redox Cycling Effect on the Surface-enhanced Raman Scattering Signal of Crystal Violet Molecules at Nanostructured Interdigitated Array Electrodes

2010

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experimental Materials and apparatusGlass substrates (24 × 24-mm-square and 0.5-mm-thick) were purchased from Matsunami, Ltd. Japan for electrode fabrication. Nanostructured interdigitated array (IDA) electrodes with different inter-electrode spacing were demonstrated to improve the detection sensitivity of short-lived electroactive species and to follow interfacial dynamics by their surface-enhanced Raman scattering (SERS) functionality. Nanostructured IDA electrodes fabricated using electron beam lithography were used for an electrochemical SERS study of irreversible electroactive species, crystal violet (CV), in an aqueous KCl solution in single and generation-collection (GC) mode experiments. The GC mode enabled us to amplify the SERS intensity. An inter-electrode spacing dependent study found the maximum number of redox cycling, collection efficiency and amplification of the SERS intensity. Its SERS function disclosed the potential-dependent dynamics of CV molecules at the electrode surface, which was not observed in the redox current. Miniaturized nanostructured IDA electrodes are of great importance for developing lab on chip devices, and are useful for analyzing dynamical features within small space/volume domains, which require small amounts and/or concentration of analytes.

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Arrays of Arbitrarily Shaped Nanoparticles: Overlay‐Errorless Direct Ion Write

Gervinskas

Seniutinas

Rosa

et al. 2013

Advanced Optical Materials

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A simple solution to lithographically write down to 20-30 nm features over micrometer-sized nanoparticle arrays with high fidelity of pattern transfer from the designed to fabricated architectures is shown. It is achieved via a two-step approach: (i) fabrication of basic shape nanoparticles by electron beam lithography, gold deposition via sputtering and lift-off, then (ii) nano-patterning by focused ion beam lithography. Application potential of 3D tailored nanoparticles for nanotweezers is discussed on the basis of numerical modeling and experimental measurements of extinction

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

Cited by 23 publications

References 40 publications

Fabrication of nanoparticles for generation of force and torque at nanoscale

Fabrication of nanoparticles for generation of force and torque at nanoscale

Redox Cycling Effect on the Surface-enhanced Raman Scattering Signal of Crystal Violet Molecules at Nanostructured Interdigitated Array Electrodes

Arrays of Arbitrarily Shaped Nanoparticles: Overlay‐Errorless Direct Ion Write

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