Provided is a method for manufacturing a power storage device in which a crystalline silicon layer including a whisker-like crystalline silicon region is formed as an active material layer over a current collector by a low-pressure CVD method in which heating is performed using a deposition gas containing silicon. The power storage device includes the current collector, a mixed layer formed over the current collector, and the crystalline silicon layer functioning as the active material layer formed over the mixed layer. The crystalline silicon layer includes a crystalline silicon region and a whisker-like crystalline silicon region including a plurality of protrusions which project over the crystalline silicon region. With the protrusions, the surface area of the crystalline silicon layer functioning as the active material layer can be increased.

A process for the preparation of a carbon-silicon composite material having carbon-based material and silicon nanomaterials, wherein the process is implemented in a rotating tubular chamber of a reactor.

A method of producing a synthetic diamond is disclosed. The method includes (a) capturing carbon dioxide from the atmosphere; (b) conducting electrolysis of water to provide hydrogen; (c) reacting the carbon dioxide obtained from step (a) with the hydrogen obtained from step (b) to produce methane; and (d) using the hydrogen obtained from step (b) and the methane obtained from step (c) to produce a synthetic diamond by chemical vapor deposition (CVD).

The present invention refers to a method for preparing a network of nanowires; to a network of nanowires obtainable by said method; to a nonwoven material comprising the network, to an electrode comprising the network, to the use of the network of nanowires and to the use of the nonwoven material.

Disclosed is a method for producing and identifying a Weyl semimetal. Identification is enabled via a combination of the vacuum ultraviolet (low-photon energy) and soft X-ray (SX) angle resolved photoemission spectroscopy (ARPES). Production generally requires providing high purity raw materials, creating a mixture, heating the mixture in a container at a temperature sufficient for thermal decomposition of an impurity while preventing the possible reaction between the side walls of the container and the raw materials, depositing the resulting compound and a transfer agent onto the bottom surface of the ampule, differentially heating the ampule, and allowing a chemical vapor transport reaction to complete.

Disclosed is a method for producing and identifying a Weyl semimetal. Identification is enabled via a combination of the vacuum ultraviolet (low-photon energy) and soft X-ray (SX) angle resolved photoemission spectroscopy (ARPES). Production generally requires providing high purity raw materials, creating a mixture, heating the mixture in a container at a temperature sufficient for thermal decomposition of an impurity while preventing the possible reaction between the side walls of the container and the raw materials, depositing the resulting compound and a transfer agent onto the bottom surface of the ampule, differentially heating the ampule, and allowing a chemical vapor transport reaction to complete.

The present invention discloses a production system for a hafnium crystal bar and the method thereof. The technical program includes a power supply unit with large DC current, an iodizer, a molybdenum insulator provided inside the iodizer, a thermostatic device, a cooling unit, a vacuum unit, an iodine box for iodizing the iodizer, an electrode unit electrically connected to the power supply unit, wherein the electrode unit is disposed above the iodizer, a crystallization unit provided inside the iodizer, wherein the crystallization unit is connected to the electrode unit, and a rough hafnium provided between the iodizer and the molybdenum insulator. The thermostatic device is a structure with an insulation layer provided outside an inner tank, and an electric heating wire is provided between the inner tank and the insulation layer. The inner tank of the thermostatic device is filled with a saline solution.

A gas phase nanowire growth apparatus including a reaction chamber, a first input and a second input. The first input is located concentrically within the second input and the first and second input are configured such that a second input fluid delivered from the second input provides a sheath between a first fluid delivered from the first input and a wall of the reaction chamber. An aerosol of catalyst particles may be used to grow the nanowires.

A method for forming a power semiconductor device is provided. The method includes: providing a semiconductor wafer grown by a Czochralski process and having a first side; forming an n-type substrate doping layer in the semiconductor wafer at the first side, the substrate doping layer having a doping concentration of at least 10.sup.17/cm.sup.3; and forming an epitaxy layer on the first side of the semiconductor wafer after forming the n-type substrate doping layer.

Growth of single crystal epitaxial films of the perovskite crystal structure by liquid- or vapor-phase means can be accomplished by providing single-crystal perovskite substrate materials of improved lattice parameter match in the lattice parameter range of interest. Current substrates do not provide as good a lattice match, have inferior properties, or are of limited size and availability because cost of materials and difficulty of growth. This problem is solved by the single-crystal perovskite solid solutions described herein grown from mixtures with an indifferent melting point that occurs at a congruently melting composition at a temperature minimum in the melting curve in the pseudo-binary molar phase diagram. Accordingly, single-crystal perovskite solid solutions, structures, and devices including single-crystal perovskite solid solutions, and methods of making single-crystal perovskite solid solutions are described herein.