Abstract: Proposed are triboelectric generator using a lubricant-infused surface controlled by a magnetic field and a manufacturing method thereof. The triboelectric generator 10 includes a substrate 100, an electrode unit 200 positioned on the substrate 100 and including a first electrode 210 and a second electrode 220, a stabilization layer 300 positioned on the substrate 100 and the electrode unit 200 and including a first elastic polymer 310, and a magneto-controllable unit 400 positioned on the stabilization layer 300 and including a lubricant 420 and a plurality of protrusion-shaped microcomposites 410, in which the microcomposite includes a magnetic material 411 and a second elastic polymer 412. The protrusion-shaped microcomposite is partially immersed in the lubricant, improves power generation efficiency, and can perform reversible switching according to the direction of the magnetic field.

Abstract: Proposed are a water-splitting hydrogen production photocatalyst including spatially separated cocatalysts and a method of preparing the same. The photocatalyst is shaped to be hollow. The photocatalyst includes a first cocatalyst core containing a first cocatalyst, a catalyst layer positioned on the first cocatalyst core and containing a first catalyst and a second catalyst, and a second cocatalyst layer positioned on the catalyst layer and containing a second cocatalyst. The photocatalyst exhibits excellent hydrogen production efficiency and charge transfer efficiency.

Abstract: A coral reef-like nickel phosphide-tungsten oxide nanocomposite is disclosed. The coral reef-like nickel phosphide-tungsten oxide nanocomposite has a structure in which algae-like transition metal-doped nickel phosphide nanosheets are deposited on coral-like tungsten oxide nanostructures grown vertically on a substrate. This structure allows the coral reef-like nickel phosphide-tungsten oxide nanocomposite to have a large surface area, which leads to a significant increase in the number of catalytic active sites, and ensures high conductivity and electrochemical stability of the coral reef-like nickel phosphide-tungsten oxide nanocomposite. Due to these advantages, the coral reef-like nickel phosphide-tungsten oxide nanocomposite has a low overpotential and superior hydrogen evolution reaction or oxygen evolution reaction efficiency when applied to a water splitting catalyst under alkaline conditions.

Abstract: The present disclosure relates to a transition metal-doped nickel phosphide nanostructure, a method for preparing the same, and a catalyst for electrochemical water decomposition including the transition metal-doped nickel phosphide nanostructure. More specifically, a transition metal-doped nickel phosphide nanostructure can be prepared by converting a zinc oxide nanostructure grown on a substrate vertically by hydrothermal synthesis to a transition metal-doped nickel oxide nanostructure by cation exchange and then phosphorizing the nickel oxide. The transition metal-doped nickel phosphide nanostructure of the present disclosure is advantageous in that it has superior catalytic activity and conductivity due to large surface area. In addition, when used as a catalyst for water decomposition under an alkaline condition, it has a low overvoltage and can have excellent catalytic activity for hydrogen evolution reaction or oxygen evolution reaction.

Abstract: Disclosed herein is a method of changing characteristics of an electronic device, including the steps of: applying light to an electronic device through a plurality of media having different refractive indexes from each other, the electrical characteristics of the electronic device being changed depending on the amount of incident light; and changing an incident angle of light applied the electronic device to adjust the amount of incident light. There is provided a method of providing light incident angle dependency by a simple procedure of accumulating additional media in various electronic devices. In the method, the light incident angle selectivity of the electronic device can be maintained even when the inclination angle of the device is changed depending on the axis parallel to the incident direction of light even though the incident direction thereof is fixed.

Abstract: Disclosed herein is a method of changing characteristics of an electronic device, including the steps of: applying light to an electronic device through a plurality of media having different refractive indexes from each other, the electrical characteristics of the electronic device being changed depending on the amount of incident light; and changing an incident angle of light applied the electronic device to adjust the amount of incident light. There is provided a method of providing light incident angle dependency by a simple procedure of accumulating additional media in various electronic devices. In the method, the light incident angle selectivity of the electronic device can be maintained even when the inclination angle of the device is changed depending on the axis parallel to the incident direction of light even though the incident direction thereof is fixed.

Abstract: Disclosed herein is a method of changing characteristics of an electronic device, including the steps of: applying light to an electronic device through a plurality of media having different refractive indexes from each other, the electrical characteristics of the electronic device being changed depending on the amount of incident light; and changing an incident angle of light applied the electronic device to adjust the amount of incident light. There is provided a method of providing light incident angle dependency by a simple procedure of accumulating additional media in various electronic devices. In the method, the light incident angle selectivity of the electronic device can be maintained even when the inclination angle of the device is changed depending on the axis parallel to the incident direction of light even though the incident direction thereof is fixed.