Measurement systems based on metal/dielectric nanostructures for electrochemical analyses

Kleps, I.; Angelescu, A.; Miu, M.

doi:10.1016/s0928-4931(01)00469-6

Cited by 14 publications

(7 citation statements)

References 1 publication

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“…The wet etching process is commonly used for this purpose, comprehensive simulation and experimental studies of the profile evolution during anisotropic wet etching being already available [29]. Furthermore, additional technological processes can be utilized to improve the electrode characteristics; thus, the deep reactive ion etching (DRIE) leads to high aspect ratio electrodes [30] and also, a supplementary sharpening of the electrode tip could be achieved by using a short isotropic wet etching process [31]. Different etching routes have been explored, tuning the process parameters, to obtain the finest electrodes; actually, it was not a single process, because our technological experiments showed that better results are obtained when both dry and wet etching are used together.…”

Section: Resultsmentioning

confidence: 99%

Design, Fabrication and Characterization of a Low-Impedance 3D Electrode Array System for Neuro-Electrophysiology

Kusko

Crǎciunoiu

Amuzescu

et al. 2012

Sensors

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Recent progress in patterned microelectrode manufacturing technology and microfluidics has opened the way to a large variety of cellular and molecular biosensor-based applications. In this extremely diverse and rapidly expanding landscape, silicon-based technologies occupy a special position, given their statute of mature, consolidated, and highly accessible areas of development. Within the present work we report microfabrication procedures and workflows for 3D patterned gold-plated microelectrode arrays (MEA) of different shapes (pyramidal, conical and high aspect ratio), and we provide a detailed characterization of their physical features during all the fabrication steps to have in the end a reliable technology. Moreover, the electrical performances of MEA silicon chips mounted on standardized connector boards via ultrasound wire-bonding have been tested using non-destructive electrochemical methods: linear sweep and cyclic voltammetry, impedance spectroscopy. Further, an experimental recording chamber package suitable for in vitro electrophysiology experiments has been realized using custom-design electronics for electrical stimulus delivery and local field potential recording, included in a complete electrophysiology setup, and the experimental structures have been tested on newborn rat hippocampal slices, yielding similar performance compared to commercially available MEA equipments.

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Section: Resultsmentioning

confidence: 99%

Design, Fabrication and Characterization of a Low-Impedance 3D Electrode Array System for Neuro-Electrophysiology

Kusko

Crǎciunoiu

Amuzescu

et al. 2012

Sensors

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show abstract

“…However, the development of techniques such as nanoimprint lithography (NIL) [17], focused ion beam (FIB) milling [18] and laser ablation, complemented by high-resolution etching techniques such as reactive ion etching (RIE) [19], have lead to the production of nanoelectrodes [20]. These nanoelectrode geometries potentially have advantages with respect to their microfabricated analogues because they have improved spatial resolution and reduced signal noise [21].…”

Section: A Development Of the Biosensormentioning

confidence: 99%

A Novel Point of Care Diagnostic Device: Impedimetric Detection of a Biomarker in Whole Blood

McMurray¹,

Ali

Kyselovik

et al. 2007

2007 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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“…Silicon nanocrystals(Si -ncs), coated with iron, were introduced by spin coating into the periodical holes of a Si(100) substrate [n -type Si(100) heavily doped (Sb) with an electrical resistivity of 3 m Ω · cm] created by a lithographic process which is described elsewhere [50] . The holes have a diameter of 7 µ m, a thickness of 300 nm and a mean hole distance of 3 µ m).…”

Section: Carbon Nanotubes Growth On Periodically Patterned Structurementioning

confidence: 99%

Carbon and Silicon Carbide Nanotubes Containing Catalysts

Pham‐Huu

Ersen

Ledoux

2007

Nanoparticles and Catalysis

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IntroductionCatalysis has been closely associated to the development of our technological modern society for more than 100 years and continues to be so today [1] . The two fi rst worldwide examples of catalysis intervention were fi rst, the Fischer -Tropsch synthesis, allowing the transformation of coal into valuable liquid fuels, which provided an energetic power supply to the German army during World War II [2] , where the nine plants in operation have a combined capacity of about 660 × 10 3 t per year; the second concerns the improvement of the octane number, still during World War II, to improve the performance of the allied aircraft during the battle of Britain [3] . The British lost 915 planes compared to the 1733 lost by the Germans. This was because of their superior maneuverability with 50% faster bursts of acceleration from their 100 -octane fuel compared to the German 87 -octane fuel. Since then an exponential increase in the participation of catalytic processes has been observed in the development of the industrialised countries. A catalyst allows the transformation of reactants into desired products with high selectivity reducing at the same time the cost linked with waste disposal. Many types of materials can be used as catalysts. These include metals, compounds, i.e. metal oxides, sulfi des, carbides, nitrides, etc., organometallic complexes, and enzymes. Most of the industrially employed catalysts are dispersed on high surface area supports (alumina, silica or activated carbon) in order to increase the number of active sites.The application and development of an industrial catalyst starts with research and control of materials at the molecular level followed by laboratory evaluation and a microplant reactor which pave the way to the real industrial catalyst. All of these processes cover several domains of research, from molecular chemistry to transport phenomena and solid state studies. Today the understanding of the macroscopic phenomena involved in catalysis seems to be relatively well under control for most of the different catalytic processes whereas the comprehension of what happens at a nanoscopic scale remains to be improved, in order to design a new generation of catalysts with better activity and selectivity. The direct way to 219 Nanoparticles and Catalysis. Edited by Didier Astruc

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Measurement systems based on metal/dielectric nanostructures for electrochemical analyses

Cited by 14 publications

References 1 publication

Design, Fabrication and Characterization of a Low-Impedance 3D Electrode Array System for Neuro-Electrophysiology

Design, Fabrication and Characterization of a Low-Impedance 3D Electrode Array System for Neuro-Electrophysiology

A Novel Point of Care Diagnostic Device: Impedimetric Detection of a Biomarker in Whole Blood

Carbon and Silicon Carbide Nanotubes Containing Catalysts

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