Abstract: Disclosed is a hydrogen sensor. The hydrogen sensor includes a substrate; a color changeable layer disposed on the substrate and made of an oxide semiconductor material, wherein when the oxide semiconductor material reacts with hydrogen ions or hydrogen atoms, a color thereof changes; a catalyst layer disposed on a surface of the color changeable layer and made of a catalyst material, wherein the catalyst material dissociates hydrogen molecules (H2) into hydrogen atoms (H) or hydrogen ions (H+); and a protective layer disposed to cover a surface of the catalyst layer and an exposed surface of the color changeable layer, and made of a polymer material, wherein the polymer material allows hydrogen molecules to pass therethrough but blocks water molecules.

Abstract: Disclosed are a chemochromic nanoparticle, a method for manufacturing the chemochromic nanoparticle, and a hydrogen sensor comprising the chemochromic nanoparticle. In particular, the chemochromic nanoparticle has a core-shell structure such that the chemochromic nanoparticle and comprises a core comprising a hydrated or non-hydrated transition metal oxide; and a shell comprising a transition metal catalyst.

Abstract: Disclosed are a chemochromic nanoparticle, a method for manufacturing the chemochromic nanoparticle, and a hydrogen sensor comprising the chemochromic nanoparticle. In particular, the chemochromic nanoparticle has a core-shell structure such that the chemochromic nanoparticle and comprises a core comprising a hydrated or non-hydrated transition metal oxide; and a shell comprising a transition metal catalyst.

Abstract: A hydrogen sensor and a method for manufacturing the same are provided. The hydrogen sensor includes a metal oxide layer formed over a substrate, and a catalytic pattern that is formed over the metal oxide layer. Further, a protective layer is formed over the catalytic pattern.

Abstract: Disclosed are a hydrogen detection sensor and a method of manufacturing the same. The hydrogen detection sensor is manufactured by using hydrothermal synthesis method to synthesize a molybdenum oxide (MoO3) nanostructure, and irradiating UV light thereon to form an MoO3—Pd nanocomposite comprising the molybdenum oxide nanostructure with palladium (Pd) catalyst particles, and coating the MoO3—Pd nanocomposite on a substrate. As such, a visible color change from the MoO3 before and after exposure to hydrogen may be so obvious that the sensing or sensitivity of hydrogen and the long-term stability may be substantially improved. In addition, the manufacturing process is simple, and the manufacturing costs may be reduced.

Abstract: A hydrogen sensor and a method for manufacturing the same are provided. The hydrogen sensor includes a metal oxide layer formed over a substrate, and a catalytic pattern that is formed over the metal oxide layer. Further, a protective layer is formed over the catalytic pattern.

Abstract: Disclosed herein is a hydrogen detecting sensor that includes a sulfide-metal catalyst, such that hydrogen gas can be detected visibly with naked eyes. Particularly, the hydrogen detecting sensor includes a substrate, a sulfide layer formed on the substrate and chemically discolored when exposed to hydrogen, and a metal catalytic layer formed on the sulfide layer.

Abstract: A hydrogen sensor and a method for manufacturing the same are provided. The hydrogen sensor includes a metal oxide layer formed over a substrate, and a catalytic pattern that is formed over the metal oxide layer. Further, a protective layer is formed over the catalytic pattern.

Abstract: Disclosed are a hydrogen detection sensor and a method of manufacturing the same. The hydrogen detection sensor is manufactured by using hydrothermal synthesis method to synthesize a molybdenum oxide (MoO3) nanostructure, and irradiating UV light thereon to form an MoO3—Pd nanocomposite comprising the molybdenum oxide nanostructure with palladium (Pd) catalyst particles, and coating the MoO3—Pd nanocomposite on a substrate. As such, a visible color change from the MoO3 before and after exposure to hydrogen may be so obvious that the sensing or sensitivity of hydrogen and the long-term stability may be substantially improved. In addition, the manufacturing process is simple, and the manufacturing costs may be reduced.

Abstract: Disclosed are a chemochromic nanoparticle, a method for manufacturing the chemochromic nanoparticle, and a hydrogen sensor comprising the chemochromic nanoparticle. In particular, the chemochromic nanoparticle has a core-shell structure such that the chemochromic nanoparticle and comprises a core comprising a hydrated or non-hydrated transition metal oxide; and a shell comprising a transition metal catalyst.

Abstract: Disclosed herein is a hydrogen detecting sensor that includes a sulfide-metal catalyst, such that hydrogen gas can be detected visibly with naked eyes. Particularly, the hydrogen detecting sensor includes a substrate, a sulfide layer formed on the substrate and chemically discolored when exposed to hydrogen, and a metal catalytic layer formed on the sulfide layer.

Abstract: A hydrogen sensor and a method for manufacturing the same are provided. The hydrogen sensor includes a metal oxide layer formed over a substrate, and a catalytic pattern that is formed over the metal oxide layer. Further, a protective layer is formed over the catalytic pattern.