0000000000890058

AUTHOR

Eugenia Matveeva

showing 3 related works from this author

Observation of New Oscillatory Phenomena during the Electrochemical Anodization of Silicon

1999

This paper reports the observation of large undamped voltage oscillations during the anodic polarization of silicon in electrol yte containing a combination of acids. One of them stimulates oxide growth and the other its chemical dissolution (in the present c ase, (0.01-0.1 M H3PO4) + (0.001- 0.01 M HF). This temporal patterning of the anodization process is shown to be due to the formation of a thin (50-90 nm) oxide layer at the sample surface and its subsequent lifting-off. The mechanism of oxide detachment i s thought to be an isotropic growth of micropores at the oxide/silicon interface triggered on by changes of electrochemical condi tions there.

Materials scienceSiliconAnodizingGeneral Chemical EngineeringIsotropyOxidechemistry.chemical_elementNanotechnologyElectrochemistryElectrochemical anodizationAnodechemistry.chemical_compoundchemistryChemical engineeringElectrochemistryGeneral Materials ScienceElectrical and Electronic EngineeringPhysical and Theoretical ChemistryPolarization (electrochemistry)Electrochemical and Solid-State Letters
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ChemInform Abstract: Observation of New Oscillatory Phenomena During the Electrochemical Anodization of Silicon.

2010

This paper reports the observation of large undamped voltage oscillations during the anodic polarization of silicon in electrol yte containing a combination of acids. One of them stimulates oxide growth and the other its chemical dissolution (in the present c ase, (0.01-0.1 M H3PO4) + (0.001- 0.01 M HF). This temporal patterning of the anodization process is shown to be due to the formation of a thin (50-90 nm) oxide layer at the sample surface and its subsequent lifting-off. The mechanism of oxide detachment i s thought to be an isotropic growth of micropores at the oxide/silicon interface triggered on by changes of electrochemical condi tions there.

chemistry.chemical_compoundSiliconchemistryChemical engineeringAnodizingIsotropyOxidechemistry.chemical_elementGeneral MedicinePolarization (electrochemistry)ElectrochemistryLayer (electronics)AnodeChemInform
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Protein delivery based on uncoated and chitosan-coated mesoporous silicon microparticles

2011

Mesoporous silicon is a biocompatible, biodegradable material that is receiving increased attention for pharmaceutical applications due to its extensive specific surface. This feature enables to load a variety of drugs in mesoporous silicon devices by simple adsorption-based procedures. In this work, we have addressed the fabrication and characterization of two new mesoporous silicon devices prepared by electrochemistry and intended for protein delivery, namely: (i) mesoporous silicon microparticles and (ii) chitosan-coated mesoporous silicon microparticles. Both carriers were investigated for their capacity to load a therapeutic protein (insulin) and a model antigen (bovine serum albumin) …

SiliconMaterials scienceSiliconBSAchemistry.chemical_elementNanotechnology02 engineering and technology010402 general chemistryPorous silicon01 natural sciencesChitosanchemistry.chemical_compoundDrug Delivery SystemsColloid and Surface ChemistryAdsorptionPorous siliconElectrochemistryAnimalsInsulinPhysical and Theoretical ChemistryBovine serum albuminChitosanbiologyProteintechnology industry and agricultureProteinsSerum Albumin BovineSurfaces and InterfacesGeneral Medicine021001 nanoscience & nanotechnologyequipment and suppliesControlled release0104 chemical sciencesMesoporous organosilicachemistryMicroscopy Electron Scanningbiology.proteinElectrochemical pore formationCattle:Investigación::33 Ciencias tecnológicas::3312 Tecnología de materiales [Materias]0210 nano-technologyMesoporous materialBiotechnology
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