TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The organometallic compound is platinum, palladium, gold, silver, copper, cobalt, ruthenium, rhodium, iridium, tantalum, titanium and/or tungsten. Preferred Components: The polymer is any polymer capable of being prepared in or changed into a liquid phase. The electrode is a platinum electrode.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The solvent of the organometallic compound solution or the solvent of the polymer solution is water, ethanol, methanol, isopropanol, 1,2-dichlorobenzene, chloroform, dimethylformamide, acetone and/or N-methylpyrrolidone.    TECHNOLOGY FOCUS - POLYMERS - Preferred Method: The step of preparing the solution mixture comprises: dissolving the organometallic compound and the polymer in solvents to prepare an organometallic compound solution and a polymer solution; and mixing the organometallic compound solution with the polymer solution to prepare the solution mixture; or dissolving the polymer in a solvent to prepare a polymer solution; and mixing the polymer solution with the organometallic compound to prepare the solution mixture; or applying heat, or heat and pressure to the polymer to prepare a polymer melt solution and dissolving the organometallic compound in a solvent to prepare an organometallic compound solution; and mixing the polymer melt solution with the organometallic compound solution to prepare the solution mixture. The ratio of the organometallic compound used as a precursor and the polymer is controlled to control the concentration of metal nanoparticles in the generated metal nanoparticle-polymer composite. The solution mixture is dried at 50-200 degrees C. The step of drying the solution mixture comprises injecting the solution mixture into a mold and drying the solution mixture to control the shape and size of the metal nanoparticle-polymer composite. The step of drying the solution mixture is performed using a doctor blade coating process, a spin coating process, a spin casting process, a roll coating process, or a deep coating process. The properties of (I) are controlled by at least one of a chemical structure, concentration, annealing temperature, and annealing time of a metal precursor and viscosity and content of the polymer. The step of drying the solution mixture comprises aligning a heat source to one side of the metal nanoparticle-particle composite to manufacture the metal nanoparticle-polymer composite having both sides with different electrical properties. The electrical properties of (I) depend on at least one condition comprising number, arrangement, shape, size, or temperature gradient of heat sources. EXAMPLE - No suitable example given.