Abstract: Disclosed are a member for a gas sensor, a gas sensor using the member, and a method of fabricating the same. Specifically, disclosed are a member for a gas sensor using a metal oxide nanofiber material in which nanocatalysts have been uniformly bound and functionalized using chitosans with which nanoparticle catalysts have been combined, a gas sensor using the member, and a method of fabricating the same.

Abstract: Disclosed are a gas sensor member, a gas sensor using the same, and manufacturing methods thereof, and specifically, a gas sensor member using a one-dimensional porous metal oxide nanotube composite material having a double average pore distribution in which mesopores (0.1 nm to 50 nm) and macropores (50 nm to 300 nm) are simultaneously formed on the surface of a nanotube through decomposition of a spherical polymer sacrificial template and continuous crystallization and diffusion of a metal oxide and a nanoparticle catalyst embedded in an apoferritin is uniformly loaded in the inside and on the outer wall and inner wall of a one-dimensional metal oxide nanotube through a high-temperature heat treatment, a gas sensor using the same, and manufacturing methods thereof are disclosed.

Abstract: Disclosed herein is a complex generator including a hydrophilic fiber membrane coated with an adsorption material. Electrical energy is generated in such a manner that the adsorption material is adsorbed onto a polar solvent in some region of the hydrophilic fiber membrane by asymmetrical wetting of the polar solvent for the hydrophilic fiber membrane.

Abstract: Disclosed are a gas sensor member, a gas sensor using the same, and manufacturing methods thereof, and specifically, a gas sensor member using a one-dimensional porous metal oxide nanotube composite material having a double average pore distribution in which mesopores (0.1 nm to 50 nm) and macropores (50 nm to 300 nm) are simultaneously formed on the surface of a nanotube through decomposition of a spherical polymer sacrificial template and continuous crystallization and diffusion of a metal oxide and a nanoparticle catalyst embedded in an apoferritin is uniformly loaded in the inside and on the outer wall and inner wall of a one-dimensional metal oxide nanotube through a high-temperature heat treatment, a gas sensor using the same, and manufacturing methods thereof are disclosed.

Abstract: Provided are conductive single crystal silicon particles coated with highly conductive carbon containing nanopores and an ultrathin metal film, a high capacity anode material including the same, and a preparing method thereof. The anode material includes conductive single crystal silicon particles each on which at least one element selected from group-III and group-V elements is doped; a thin metal layer formed to coat the surface of each of the conductive single crystal silicon particles; and a highly conductive carbon coating layer formed on the thin metal layer, wherein nanopores are formed between the conductive single crystal silicon particle and the carbon coating layer.

Abstract: Disclosed is a 1D nanofibers quasi-aligned, grid structure cross-laminated, and pore distribution and size controlled 3D polymer nanofiber membrane, and manufacturing method thereof. A 3D polymer nanofiber membrane controlled in pore size and porosity is formed by employing an electrospinning pattern forming apparatus that includes double insulating blocks quasi-aligns nanofibers in a specific direction by transforming an electric field and includes a current collector rotatable in 90°. Additionally, the 3D polymer nanofiber membrane may be used for air filters, separator, water filters, cell culture membranes, and so on by allowing various properties thereto through a functional surface coating.

Abstract: Disclosed are amorphous carbon nanofibers including copper nanoparticles or copper alloy nanoparticles, copper composite nanoparticles prepared by grinding the amorphous carbon nanofibers and implemented as surfaces of Cu-included particles are partially or wholly coated with amorphous carbons, a dispersed solution including the copper composite nanoparticles, and preparation methods thereof and the amorphous carbon nanofibers include nanoparticles including copper, copper nanoparticles or copper alloy nanoparticles, and, the copper composite nanoparticles are implemented as surfaces of Cu-included particles are partially or wholly coated with amorphous carbons.

Abstract: Disclosed are polymer nanofiber sensors for detecting gas, which generates visible color change although a specific gas having a concentration of less than 1 ppm is exposed to the sensor in a short time, in which it is impossible to detect the gas using existing colorimetric sensors, through securing high surface area and porosity, and a method of the same.

Abstract: Provided are conductive single crystal silicon particles coated with highly conductive carbon containing nanopores and an ultrathin metal film, a high capacity anode material including the same, and a preparing method thereof. The anode material includes conductive single crystal silicon particles each on which at least one element selected from group-III and group-V elements is doped; a thin metal layer formed to coat the surface of each of the conductive single crystal silicon particles; and a highly conductive carbon coating layer formed on the thin metal layer, wherein nanopores are formed between the conductive single crystal silicon particle and the carbon coating layer.

Abstract: The inventive concepts relate to a member for a gas sensor, a gas sensor using the same, and a method of manufacturing the same. More particularly, the inventive concepts relate to a gas sensor member using a porous semiconductor metal oxide complex nanofiber functionalized by uniformly distributing porous first metal oxide particles, including metal nanoparticle catalysts synthesized using a metal-organic framework, in the inside and on a surface of a second metal oxide nanofiber, a gas sensor using the same, and a method of manufacturing the same.

Abstract: Disclosed are a gas sensor member, a gas sensor using the same, and manufacturing methods thereof, and specifically, a gas sensor member using a one-dimensional porous metal oxide nanotube composite material having a double average pore distribution in which mesopores (0.1 nm to 50 nm) and macropores (50 nm to 300 nm) are simultaneously formed on the surface of a nanotube through decomposition of a spherical polymer sacrificial template and continuous crystallization and diffusion of a metal oxide and a nanoparticle catalyst embedded in an apoferritin is uniformly loaded in the inside and on the outer wall and inner wall of a one-dimensional metal oxide nanotube through a high-temperature heat treatment, a gas sensor using the same, and manufacturing methods thereof are disclosed.

Abstract: Provided are a composite metal oxide material, a method of manufacturing the same, and a gas sensor using the same as a sensing material thereof. The composite metal oxide material may include polycrystalline nanofibers and at least one of microparticles and nanoparticles. The use of the composite metal oxide material makes it possible to improve structural, mechanical, thermal, and lifetime stabilities of the gas sensor. Further, the presence of the microparticles and/or nanoparticles allows the gas sensor to have a base resistance lower than that of a nanofiber-based gas sensor. Since the microparticles and/or nanoparticles are attached to the nanofibers, the composite metal oxide material can have an increased mobility of electrons or holes and an increased surface area, and thus, the gas sensor can have fast response/recovery speeds and high gas sensitivity.

Abstract: Disclosed is an electrode for lithium-air batteries without using a binder and a carbon additive and a method of manufacturing the same, and more specifically, provided is a nanofiber network-based current collector-catalyst monolithic porous air electrode which has an improved specific surface area and high air permeability as the energy density per weight is increased and the diameter, porosity, and thickness of the nanofibers are controlled by utilizing a significantly light polymer and carbon based material.

Abstract: Provided are a composite metal oxide material, a method of manufacturing the same, and a gas sensor using the same as a sensing material thereof. The composite metal oxide material may include polycrystalline nanofibers and at least one of microparticles and nanoparticles. The use of the composite metal oxide material makes it possible to improve structural, mechanical, thermal, and lifetime stabilities of the gas sensor. Further, the presence of the microparticles and/or nanoparticles allows the gas sensor to have a base resistance lower than that of a nanofiber-based gas sensor. Since the microparticles and/or nanoparticles are attached to the nanofibers, the composite metal oxide material can have an increased mobility of electrons or holes and an increased surface area, and thus, the gas sensor can have fast response/recovery speeds and high gas sensitivity.

Abstract: The present invention provides a gas sensor, including: a sensor substrate provided with an electrode; and a thin layer of sensor material formed by spraying a solution in which metal oxide nanoparticles are dispersed onto the sensor substrate. The gas sensor is advantageous in that a sensor material is formed into a porous thin layer containing metal oxide nanoparticles having a large specific surface area, thus realizing high sensitivity on the ppb scale and a high reaction rate. Further, the gas sensor is advantageous in that it can be manufactured at room temperature, and the thickness of a sensor material can be easily adjusted by adjusting the spray time, so that a thin gas sensor or a thick gas sensor can be easily manufactured.

Abstract: A sensing material for a gas sensor, a gas sensor including the sensing material, a method of preparing the sensing material, and a method of manufacturing a gas sensor using the sensing material are provided.

Abstract: A transfer layer includes a transparent substrate. A buffer layer is formed on the transparent substrate that comprises PbO, GaN, PbTiO3, La0.5Sr0.5CoO3 (LSCO), or LaxPb1-xCoO3 (LPCO) so that separation between the buffer layer and the transparent substrate occurs at substantially high temperatures.

Abstract: The present invention relates to an electrode for a secondary battery, comprising a collector and a porous electrode active material layer disposed on at least one surface of the collector by spraying metal oxide nanoparticle dispersion, wherein the porous electrode active material comprises one selected from the group consisting of aggregated metal oxide nanoparticles, metal oxide nanoparticles and a mixture thereof, which is capable of undergoing stable high speed charging/discharging cycles under a high-energy-density and high-current condition.

Abstract: A photovoltaic-charged secondary battery system is provided, in which an electrode for optical power generation and an electrode for charging and discharging generated electrical energy are integrated into a single cell structure, and the potential difference between the electrodes is systematically controlled, thus maximizing the conversion efficiency of optical energy, maximizing the utilization rate of cell energy, and extending the life span of the battery. Thus, the photovoltaic-charged secondary battery system may include a transparent electrode capable of transmitting light; a PN semiconductor layer formed on the transparent electrode and generating a current by incident light; and a secondary battery layer, formed on the PN semiconductor layer, in which the current generated by the PN semiconductor layer is charged.

Abstract: Disclosed are a composite electrode active material and a supercapacitor using the same, and more particularly, an electrode active material having M1-xRuxO3 (M=Sr, Ba, Mg) and a supercapacitor using the same, wherein the electrode active material is characterized by comprising M1-xRuxO3, where M is at least one selected from a group consisting of strontium, barium and magnesium, and a method for fabricating a composite electrode active material comprises (a) preparing a spinning solution containing a precursor of M oxide, a precursor of Ru oxide, a polymer and a solvent, (b) spinning the spinning solution on a collector to fabricate a nanofiber web having M1-xRuxO3 precursor, and (c) performing heat treatment for the nanofiber web to remove the polymer so as to make an electrode active material in the structure of porous nanofiber web having M1-xRuxO3, wherein the M comprises at least one selected from a group consisting of strontium, barium and magnesium.