Abstract:
A method and an arrangement for providing chalcogens as thin layers on substrates, in particular on planar substrates prepared with precursor layers and composed of any desired materials, preferably on substrates composed of float glass, is achieved by forming an inlet- and outlet-side gas curtain for an oxygen-tight closure of a transport channel in a vapour deposition head, introducing an inert gas into the transport channel for displacing atmospheric oxygen, introducing one or more substrates to be coated, the substrates being temperature-regulated to a predetermined temperature, into the transport channel, introducing a chalcogen vapour/carrier gas mixture from a source into the transport channel at the vapour deposition head above the substrates and forming a selenium layer on the substrates by PVD at a predetermined pressure, and removing the substrates after a predetermined process time has elapsed.
Abstract:
This invention discloses a solution-based synthesis of cesium tin tri-iodide (CsSnI3) film. More specifically, the invention is directed to a solution-based drop-coating synthesis of cesium tin tri-iodide (CsSnI3) films. CsSnI3 films are ideally suited for a wide range of applications such as light emitting and photovoltaic devices.
Abstract:
Transparent conducting electrodes include a doped single walled carbon nanotube film and methods for forming the doped single walled carbon nanotube (SWCNT) by solution processing. The method generally includes depositing single walled carbon nanotubes dispersed in a solvent and a surfactant onto a substrate to form a single walled carbon nanotube film thereon; removing all of the surfactant from the carbon nanotube film; and exposing the single walled carbon nanotube film to a single electron oxidant in a solution such that one electron is transferred from the single walled carbon nanotubes to each molecule of the single electron oxidant.
Abstract:
An insulating glass-ceramic substrate for synthesizing graphene includes discrete, crystalline, nanophase metallic regions capable of catalyzing graphene growth. The nanophase regions may be formed by thermal treatment of a glass-ceramic substrate containing the corresponding metal oxide. Single layer and double layer graphene are prepared on the modified glass-ceramic substrate in a vacuum chemical vapor deposition (CVD) process from hydrocarbon precursors. The graphene-coated glass-ceramic substrate is electrically conductive.
Abstract:
The invention relates to a method for obtaining a magnesium fluoride (MgF2) sol solution, comprising the steps of providing a magnesium alkoxide precursor in a non-aqueous solvent and adding 1.85 to 2.05 molar equivalents of non-aqueous hydrofluoric acid to said magnesium precursor, characterized in that the reaction proceeds in the presence of carbon dioxide. The invention further relates to sol solutions, method of applying the sol solutions of the invention to surfaces as a coating, and to antireflective coatings obtained thereby.
Abstract:
The invention relates to a method for obtaining a magnesium fluoride (MgF2) sol solution, comprising the steps of providing a magnesium alkoxide precursor in a non-aqueous solvent and adding 1.85 to 2.05 molar equivalents of non-aqueous hydrofluoric acid, characterized in that the reaction proceeds in the presence of a second magnesium fluoride precursor selected from the group of salts of strong, volatile acids, such as a chloride, bromide, iodide, nitrate or triflate of magnesium, or of a catalytic amount of a strong, volatile acid; and/or an additive non-magnesium fluoride precursor selected from the group of salts of strong, volatile acids, such as a chloride, bromide, iodide, nitrate or triflate of lithium, antimony, tin calcium, strontium, barium, aluminium, silicium, zirconium, titanium or zinc. The invention further relates to sol solutions, method of applying the sol solutions of the invention to surfaces as a coating, and to antireflective coatings obtained thereby.
Abstract:
A method of producing a magnesium fluoride coating includes a step of forming a coating by applying a solution containing a fluorine-containing organic magnesium compound represented by the following formula to a base and a step of heat-treating the coating while the coating is being irradiated with a beam of light with a wavelength of 246 nm or less: Mg(CF3—X—COO)2 (1) wherein X represents a single bond or one of —(CF2)n—, —(CH2)m—, and —CH2CF2— that may have a substituent, where n and m each represent an integer of 1 to 4. The temperature of the heat-treating step can be 250° C. or lower. The coating can be irradiated with a beam of light with a wavelength of 185 nm or less.
Abstract:
Transparent conducting electrodes include a doped single walled carbon nanotube film and methods for forming the doped single walled carbon nanotube (SWCNT) by solution processing. The method generally includes depositing single walled carbon nanotubes dispersed in a solvent and a surfactant onto a substrate to form a single walled carbon nanotube film thereon; removing all of the surfactant from the carbon nanotube film; and exposing the single walled carbon nanotube film to a single electron oxidant in a solution such that one electron is transferred from the single walled carbon nanotubes to each molecule of the single electron oxidant.
Abstract:
Methods for improving the strength of glass substrates are described. One such method for strengthening a glass disk substrate for a storage device includes immersing at least a portion of the glass substrate in a solution, the solution including a solvent and a coating material selected from the group consisting of NaOH, KOH, and KNO3, removing the glass substrate from the solution, allowing the solvent to evaporate from the glass substrate, and heating the glass substrate at a preselected temperature for a preselected duration, where the preselected temperature is sufficient to substantially melt the coating material and is less than a transition temperature of the glass substrate.
Abstract:
A scratch-resistant glass substrate is prepared by forming a hard, scratch-resistant layer over a major surface of the substrate. The layer is formed from an inorganic material such as a metal oxide, metal nitride, metal carbide, or metal boride using, for example, physical vapor deposition such as reactive or non-reactive sputtering at a process temperature of less than 500° C. The inorganic layer is resistant to micro-ductile scratching, which can safeguard the visible appearance of the glass substrate in use. The glass substrate can include chemically-strengthened glass.