Releasing dye encapsulated in proteinaceous microspheres on conductive fabrics by electric current

The current paper reports on the relase properties of conductive fabrics coated with proteinaceous microspheres containing a dye. The release of the dye was achieved by passing an electric current through the fabric. The conductivity of the polyester fibers resulted from nanosilver (Ag NPs) coated on the surface of these fibers. Both types of coatings (nanosilver coating and the coating of the proteinaceous microspheres) were performed using high-intensity ultrasonic waves. Two different types of dyes, hydrophilic RBBR (Remazol Brilliant Blue R) and hydrophobic ORO (Oil Red O), were encapsulated inside the microspheres (attached to the surface of polyester) and then released by applying an electric current. The Proteinaceous Microsphere (PM)-coated conductive fabrics could be used in medicine for drug release. The encapsulated dye can be replaced with a drug that could be released from the surface of fabrics by applying a low voltage

Electrochemical behaviour of Ti/Al2O3/Ni nanocomposite material in artificial physiological solution: Prospects for biomedical application

Inorganic-based nanoelements such as nanoparticles (nanodots), nanopillars and nanowires, which have at least one dimension of 100 nm or less, have been extensively developed for biomedical applications. Furthermore, their properties can be varied by controlling such parameters as element shape, size, surface functionalization, and mutual interactions. In this study, Ni-alumina nanocomposite material was synthesized by the dc-Ni electrodeposition into a porous anodic alumina template (PAAT). The structural, morphological, and corrosion properties were studied using x-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), and electrochemical techniques (linear sweep voltammetry). Template technology was used to obtain Ni nanopillars (NiNPs) in the PAAT nanocomposite. Low corrosion current densities (order of 0.5 μA/cm2) were indicators of this nanocomposite adequate corrosion resistance in artificial physiological solution (0.9% NaCl). A porous anodic alumina template is barely exposed to corrosion and performs protective functions in the composite. The results may be useful for the development of new nanocomposite materials technologies for a variety of biomedical applications including catalysis and nanoelectrodes for sensing and fuel cells. They are also applicable for various therapeutic purposes including targeting, diagnosis, magnetic hyperthermia, and drug delivery. Therefore, it is an ambitious task to research the corrosion resistance of these magnetic nanostructures in simulated body fluid. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.Government Council on Grants, Russian FederationBelarusian Republican Foundation for Fundamental Research, BRFFR: Ф18Д-00720163522Funding: The work was performed with support of State Scientific and Technical Program “Nanotech” (ГБЦ No 20163522), Belarusian Republican Foundation for Fundamental Research (Grant No. Ф18Д-007), Act 211 of Government of Russian Federation (contract No. 02.A03.21.0011). Additionally, the work was partially supported by the Grant of World Federation of Scientists (Geneva, Switzerland)

ТЕХНОЛОГИЧЕСКИЕ ОСОБЕННОСТИ ФОРМИРОВАНИЯ ПЛАТ СО ВСТРОЕННОЙ СИСТЕМОЙ МЕЖСОЕДИНЕНИЙ В ПОДЛОЖКАХ АНОДНОГО

Results of the interconnection system formation during substrate anode alumina processing are presented. It is proved that anode Al2O3 substrate, interconnection system in the bulk and contact pads formation is possible simultaneously. The thickness of the anode Al2O3 substrate, the distribution of the interconnection system in its volume, the sizes of the conducting tracks and pads are specified by the method of the concrete board fabrication. It is possible to connect outboard or formed on the substrate surface later elements of integrated circuits with use external outputs with interconnection system.Изложен результат исследований создания системы межсоединений в процессе формирования подложки анодного оксида алюминия. Варьируя параметрами процесса анодирования и последовательностью технологических операций можно одновременно формировать подложку Al2O3 и систему межсоединений в ее обьеме с выводом на поверхность контактных площадок. Толщина подложки анодного Al2O3, расположение системы межсоединений в ее объеме, размеры проводящих дорожек и площадок задаются в методике изготовления конкретной платы. С помощью внешних выводов к этой системе межсоединений можно подсоединить навесные или формируемые в дальнейшем на поверхности подложки элементы микросхемы

Electrochemical alumina technology for power electronics devices

Обсуждается электрохимическая алюмооксидная технология для формирования теплопроводящих подложек алюминия с диэлектрическим слоем анодного оксида алюминия с пробивными напряжениями выше 6 кВ. Разработанная технология может быть использована при создании практически любого радиоэлектронного устройства для работы в области температур от 10 до 473 К и частот гигагерцового диапазона. The electrochemical alumina technology (ELAT) for the formation of heat-conducting aluminum substrates with a dielectric layer of anodic aluminum oxide with breakdown voltages above 6 kV is discussed. The developed technology can be used in the production of any electronic device operated in the temperature range from 10 to 473 K and frequencies of the gigahertz range

ЭЛЕКТРОХИМИЧЕСКАЯ АЛЮМООКСИДНАЯ ТЕХНОЛОГИЯ ДЛЯ ПРИБОРОВ СИЛОВОЙ ЭЛЕКТРОНИКИ

The electrochemical alumina technology (ELAT) for the formation of heat-conducting aluminum substrates with a dielectric layer of anodic aluminum oxide with breakdown voltages above 6 kV is discussed. The developed technology can be used in the production of any electronic device operated in the temperature range from 10 to 473 K and frequencies of the gigahertz range.Обсуждается электрохимическая алюмооксидная технология для формирования теплопроводящих подложек алюминия с диэлектрическим слоем анодного оксида алюминия с пробивными напряжениями выше 6 кВ. Разработанная технология может быть использована при создании практически любого радиоэлектронного устройства для работы в области температур от 10 до 473 К и частот гигагерцового диапазона

Electrochemical behaviour of Ti/Al2O3/Ni nanocomposite material in artificial physiological solution: Prospects for biomedical application

Inorganic-based nanoelements such as nanoparticles (nanodots), nanopillars and nanowires, which have at least one dimension of 100 nm or less, have been extensively developed for biomedical applications. Furthermore, their properties can be varied by controlling such parameters as element shape, size, surface functionalization, and mutual interactions. In this study, Ni-alumina nanocomposite material was synthesized by the dc-Ni electrodeposition into a porous anodic alumina template (PAAT). The structural, morphological, and corrosion properties were studied using x-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), and electrochemical techniques (linear sweep voltammetry). Template technology was used to obtain Ni nanopillars (NiNPs) in the PAAT nanocomposite. Low corrosion current densities (order of 0.5 μA/cm2) were indicators of this nanocomposite adequate corrosion resistance in artificial physiological solution (0.9% NaCl). A porous anodic alumina template is barely exposed to corrosion and performs protective functions in the composite. The results may be useful for the development of new nanocomposite materials technologies for a variety of biomedical applications including catalysis and nanoelectrodes for sensing and fuel cells. They are also applicable for various therapeutic purposes including targeting, diagnosis, magnetic hyperthermia, and drug delivery. Therefore, it is an ambitious task to research the corrosion resistance of these magnetic nanostructures in simulated body fluid. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.Government Council on Grants, Russian FederationBelarusian Republican Foundation for Fundamental Research, BRFFR: Ф18Д-00720163522Funding: The work was performed with support of State Scientific and Technical Program “Nanotech” (ГБЦ No 20163522), Belarusian Republican Foundation for Fundamental Research (Grant No. Ф18Д-007), Act 211 of Government of Russian Federation (contract No. 02.A03.21.0011). Additionally, the work was partially supported by the Grant of World Federation of Scientists (Geneva, Switzerland)

ТЕХНОЛОГИЧЕСКИЕ ПРИЕМЫ ФОРМИРОВАНИЯ Al-Al2O3 МИКРОСТРУКТУР ДЛЯ МОЩНЫХ ЭЛЕКТРОМЕХАНИЧЕСКИХ СИСТЕМ

Thus, Al-Al2O3 structures characteristic features of which are the considerable height (300 - 450 μm ) of contact pads and conducting lines, the high thickness (150 - 600 μm ) of insulating anodic alumina with high breakdown voltages between the contact pads (up to 8 kV) were made in the present work. Such structures may be used in power electromechanical systems. Methods of the high-speed anodization, of the deep anodization and chemical etching were investigated to provide practically vertical walls in the Al-Al2O3 system.В результате проделанной работы получены алюмооксидные структуры Al-Al2O3, особенностью которых является значительная высота алюминиевых контактных площадок и проводящих элементов (300…450 мкм); большая толщина анодного оксида алюминия (150…600 мкм) с высокими пробивными напряжениями между контактными площадками (~8 кВ), которые могут быть использованы в мощных электромеханических системах. Исследованы методы высокоскоростного анодирования, локального глубокого анодирования и химического травления, позволяющие добиться получения практически вертикального профиля стенок в системе Al-Al2O3

Методы электрохимического формирования однослойных и двухслойных мембранных структур на основе наноструктурированного анодного оксида алюминия

Technological methods for the formation of 30-70 mm thick free porous one­layer Al2O3 membranes with open­ended modificated pores from 50 to 90 nm in diameters by a two­stage one­sided anodization in oxalic acid electrolyte and combined method for the barrier layer removal were developed. Technological features for the fabrication of 73-216 μm thick porous two­layer Al2O3 membranes with 55 nm pores diameters by a two­sided through anodization and subsequent bipolar anodization for local internal Al inclusions removal were studied.Разработаны технологические способы формирования свободных пористых однослойных Al2O3-мембран толщиной 30-70 мкм со сквозными каналами модифицированных пор диаметром 50-90 нм с использованием двухстадийного одностороннего анодирования в электролите щавелевой кислоты и комбинированной методики удаления барьерного слоя. Изучены технологические особенности создания двухслойных Al2O3-мембран толщиной 73-216 мкм с диаметром пор 55 нм с применением двухстороннего сквозного анодирования и последующего биполярного анодирования для исключения локальных внутренних Al-включений

Formation and corrosion properties of Ni-based composite material in the anodic alumina porous matrix

Ni nanopillars (Ni NPs) composite material formation technology embedded in porous anodic alumina by electrochemical deposition is presented in this paper. The morphological and structural properties of the composite material were investigated using scanning electron microscopy, atomic force microscopy, X-ray diffraction. The corrosion resistance of the nanocomposite materials has been studied by potentiodynamic polarization curves analysis and polarization resistance method. The composite represents the array of vertically ordered Ni NPs with the identical size in alumina matrix. XRD investigation indicates that Ni NPs are polynanocrystalline material with 18 nm crystallite size. It has been shown that Ni NPs and the composite material have sufficient corrosion resistance in a 0.9% aqueous NaCl solution. Porous alumina is the neutral and protective component of the composite. These nanocomposite materials can be excellent candidates for practical use in electronics, sensorics, biomedicine

Studying the Thermodynamic Properties of Composite Magnetic Material Based on Anodic Alumina

Magnetic nanoparticles based on Fe3O4 and their modifications of surface with therapeutic substances are of great interest, especially drug delivery for cancer therapy includes boron-neutron capture therapy. In this paper we study the thermodynamic, morphological, structural, and chemical properties of a composite material consisting of nickel nanowires (NWs) electrochemically deposited in the pores of the membrane of porous anodic aluminum oxide (PAA) by methods of differential thermal analysis (DTA), scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), and dispersive X-ray spectroscopy (EDX)