Abstract:
A method for fabricating copper nanoparticles having oxidation resistance and copper nanoparticles having oxidation resistance which comprises: a solution manufacturing step which manufactures a first stirring solution by preparing a first solution including solvents, polymers, and organic acids and stirring the first solution; a reaction step which manufactures a second reaction solution by mixing the first stirring solution, copper precursors, and a first reducing agent; a manufacturing step which manufactures a third reaction solution by mixing the second reaction solution with a second reducing agent; and a collection step which isolates and collects the copper nanoparticles included in the third reaction solution. Therefore, the method for fabricating copper nanoparticles can manufacture copper nanoparticles at room temperature in air atmosphere with a simple process and facilitate mass production of the copper nanoparticles using an environmentally-friendly method which applies aqueous solvents as first. Especially, the copper nanoparticles according to the present invention have enhanced oxidation resistance so that the copper nanoparticles can be stored for 3 months at room temperatures in the air without being oxidized.
Abstract:
The present invention relates to a polymer electrolyte membrane-electrode assembly with an enhanced hydrophobicity by maximizing the surface area by forming a nanopattern with a high aspect ratio on the catalytic carrier on the surface of a catalyst layer in order to supply ultra hydrophobicity to the surface of the catalyst layer, and by coating a hydrophobic thin film on the surface, and a manufacturing method thereof. The present invention provides a manufacturing method of a polymer electrolyte membrane-electrode assembly, which comprises a step of forming a nanopattern with a high aspect ratio by plasma-etching the catalyst carrier on the surface of a catalyst layer forming MEA; and a step of forming a hydrophobic thin film on the nanopattern formed on the catalyst carrier. [Reference numerals] (AA) Ultra hydrophobicity surface treatment (plasma etching + hydrophobic thin film coating); (BB) Catalyst layer; (CC,GG) Catalyst carrier; (DD) Catalyst; (EE,HH) Polymer electrolyte membrane; (FF) Hydrophobic thin film
Abstract:
PURPOSE: An electroluminescent polymer nanoparticle and a manufacturing method thereof are provided to form a stable water-base dispersed phase with the stabilized surface processed with a biocompatible surfactant, and to use the nanoparticle as a contrast agent for a cell or an organism. CONSTITUTION: An electroluminescent polymer nanoparticle contains a nanoparticle of a cyano-substituted polyarylenevinylene polymer marked with chemical formula 1, and a biocompatible surfactant adsorped to the surface of the nanoparticle of the cyano-substituted polyarylenevinylene polymer. In the chemical formula 1, n is an integer of 10~10,000.