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Kleps, I.; Angelescu, A.; Vasilco, R.; Dascǎlu, D.

doi:10.1023/a:1011469102224

Cited by 22 publications

(8 citation statements)

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“…An additional oxidation process was applied to sharpen the structure before deposition of either a gold or platinum film by metal organic chemical vapor deposition (MOCVD). A final layer of insulating SiO 2 or SiO 2 /Si 3 N 4 sandwich was deposited, before a short period of maskless UV exposure to remove the very tops of the insulating material covering the pyramid,thus creating nanocone electrodes [50,51]. The electrochemical characterization of these types of nanoelectrodes was recently reported [52].…”

Section: Non-high-resolution Techniquesmentioning

confidence: 99%

Top‐Down Approaches to the Fabrication of Nanopatterned Electrodes

Lanyon

Arrigan

2008

Nanostructured Materials in Electrochemistry

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Section: Non-high-resolution Techniquesmentioning

confidence: 99%

Top‐Down Approaches to the Fabrication of Nanopatterned Electrodes

Lanyon

Arrigan

2008

Nanostructured Materials in Electrochemistry

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“…The conical microelectrode arrays were fabricated by photolithographic and reactive ion etching techniques, as described in Refs [23,24], and Figure 2 shows a scheme of the fabrication procedure. The substrate material, a p-type (100) silicon wafer of 6 -10 W cm À1 electrical resistivity ( Fig.…”

Section: Preparation Of Microelectrode Arraysmentioning

confidence: 99%

Voltammetric Characterization of Micro‐ and Submicrometer‐Electrode Arrays of Conical Shape for Electroanalytical Use

et al. 2006

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Densely packed micro-and submicrometer electrode arrays of platinum and gold (the nominal number, N, of electrodes in each array varies between 225 and 3600) are fabricated by photolithographic technique and vapor deposition processes of metal films. The electrodes are conical-shaped and only their apexes are exposed to the electrolytic solution. The electrode arrays are characterized electrochemically in Ru(NH 3 ) 6 Cl 3 aqueous solutions by using cyclic voltammetry at low scan rates, to establish the number of electrochemically active electrodes (N ac ) in each array; the geometric characterization is performed by scanning electron microscopy. All the investigated arrays provide steady-state voltammograms, indicating diffusionally independent behavior of each microelectrode. The number of microelectrodes that are active in the fabricated arrays depends on microelectrode density. In particular, for the arrays with N ¼ 3600 and N ¼ 225, the fraction of active sites is about 45% and 90%, respectively. The analytical performance of some of the Pt version of the arrays is tested in hydrogen peroxide solutions, allowing verifying that linear calibration plots over the concentration range (0.1 -20 mM) are obtained. This dynamic range is larger than that typically recorded at smooth polycrystalline platinum electrodes (0.5 -5 mM), and the better performance is attributed to both the higher aspect ratio of the cone geometry and the higher mass transport associated to each microelectrode of the array. Reproducibility (within 3.5%, r.s.d.) and long-term stability (within 5%, r.s.d., after 8 h continuous use) of the electrode systems are satisfactory. A low detection limit, based on the signal to noise ratio equal to 3, of 0.05 mM is found, which is adequate for a rapid monitoring of H 2 O 2 in real samples and industrial processes.

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“…Pt films deposited on the top of cathodes and anodes of pacemakers serve as electrodes for treatment of human heart disease . Several techniques including sputtering, physical vapour deposition, radiofrequency sputtering, electodeposition and metal–organic chemical vapour deposition (MOCVD)/atomic layer deposition (ALD) have been used to produce Pt films on the components of medical devices. Among these techniques, MOCVD/ALD seems to be suitable for deposition of films with required surface morphology onto substrates with various geometric shapes and sizes.…”

Section: Introductionmentioning

confidence: 99%

Chemical vapour deposition of platinum films on electrodes for pacemakers: Novel precursors and their thermal properties

Dorovskikh

Zharkova

Turgambaeva

et al. 2016

Applied Organom Chemis

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Air-stable trimethylplatinum(IV) β-diketonate complexes of general formula (CH 3 ) 3 Pt(L)Py (L = R 1 COCHCOR 2 ; R 1 = R 2 = CF 3 (hfac), t Bu (thd), CH 3 (acac); R 1 = CF 3 , R 2 = t Bu (ptac), CH 3 (tfac); Py = pyridine) have been synthesized in high yields. The thermal properties of (CH 3 ) 3 Pt(L)Py were investigated using thermogravimetry/differential thermal analysis and flow method to demonstrate their suitability as metal-organic chemical vapour deposition precursors. Thermolysis of vaporized (CH 3 ) 3 Pt(acac)Py in vacuum and in the presence of hydrogen or oxygen was studied under conditions of low-pressure chemical vapour deposition using an original technique. Using this precursor, Pt films were deposited on electrodes for pacemakers under various conditions. The composition, structure, morphology and electrochemical properties of the deposited films were investigated using X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy and cyclic voltammetry and LCR measurements. Pt films deposited in the presence of oxygen have a fractal-like morphology as a result the highest values of real surface areas (851-943 mm 2 ) and capacity (5-8.5 μF mm −2 ).

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Untitled

Cited by 22 publications

References 1 publication

Top‐Down Approaches to the Fabrication of Nanopatterned Electrodes

Top‐Down Approaches to the Fabrication of Nanopatterned Electrodes

Voltammetric Characterization of Micro‐ and Submicrometer‐Electrode Arrays of Conical Shape for Electroanalytical Use

Chemical vapour deposition of platinum films on electrodes for pacemakers: Novel precursors and their thermal properties

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