Abstract:
Disclosed are an insulating sheet of a heterogeneous laminated structure including a graphene sheet and a hexagonal boron nitride sheet and a manufacturing method thereof. The insulating sheet of the heterogeneous laminated structure can be applied to various electric devices including a transistor because it includes the hexagonal boron nitride sheet with a high surface feature on the graphene sheet with a large area. An electron mobility feature can be dramatically improved when an electric field effect transistor is formed with a graphene channel layer using the insulating sheet as a substrate.
Abstract:
The present invention is to greatly improve the output of an electrostatic energy harvester by amplifying and maintaining an electrostatic effect generated due to friction by using a three dimensional truncated cone structure. A three dimensional truncated cone structured electrostatic energy harvester according to one embodiment of the present invention includes a first substrate which has an open bottom surface and a truncated cone shape; a first structure which includes a first friction charged body on the outer surface of the first substrate; a second substrate which has the same shape as the first substrate; a second structure which includes a second friction charged body which is made of a material which has an opposite charge property to the first friction charged body and is formed on the outer surface of the first substrate; a lead line which is connected to the first friction charged body and the second friction charged body, respectively. The second structure is stacked on the first structure. Frictional electricity is generated by touching them together. An electrostatic induction phenomenon is generated when they are separated from each other.
Abstract:
PURPOSE: A subtle energy nanogenerator using graphene is provided to implement a self-powered device by harvesting the drop energy of raindrops. CONSTITUTION: A bottom substrate is flexible. A graphene bottom electrode is arranged on the bottom substrate. Piezoelectric materials are grown on the bottom electrode. Graphene is transferred on the grown piezoelectric materials. The flexible bottom substrate is made of plastic, glass, sapphire, paper, or silicon. [Reference numerals] (AA) Raindrop; (BB) Graphene; (CC) Piezoelectric materials; (DD) Lower electrode; (EE) Lower substrate
Abstract:
나노전력발전소자는 베이스 기판과, 상기 베이스 기판 상에 구비되는 육방정계 질화붕소 원자층과, 상기 육방정계 질화붕소 원자층 상에 구비되는 제1 전극 및 상기 육방정계 질화붕소 원자층 상에 구비되며, 상기 제1 전극과 이격되는 제2 전극을 포함한다. 육방정계 질화붕소 원자층의 압전 특성을 이용하여 나노전력발전소자가 지속적이고 독립적으로 구동할 수 있다.
Abstract:
PURPOSE: A nano generator and a method for manufacturing the same are provided to change vibration to electric energy by using a nanostructure having excellent piezoelectric characteristic. CONSTITUTION: A nano electric generator includes a substrate, a first electrode(130), a second electrode(120) and a nanostructure(140). The first electrode is separated from the substrate. The second electrode is formed on the substrate. The nanostructure is formed between the substrate and the first electrode.
Abstract:
PURPOSE: A manufacturing method of a metal oxide thin film on a graphene is provided to manufacture a metal oxide thin film having an excellent crystallization and conductivity at any temperature without any damage of a grapheme. CONSTITUTION: A manufacturing method of a metal oxide thin films on a graphene comprises the step of obtaining a metal precursor solution by dissolving a metal precursor compound in a low-boiling point solvent, the step of obtaining a liquid drop dispersed in which metal oxide precursors are dispersed in a solvent by the ultrasonic treatment of the metal precursor solution, and the step of absorbing the liquid drop into a graphene wherein the liquid drop sis supplied by a carrier gas into a chamber containing a graphene. The metal precursor compound is at least one kind selected from a group composed of metal acetate, chloride, nitrate and acetic anhydride. The metal precursor compound is at least one kind from a group composed of zinc, copper, aluminum, tin and magnesium. The solvent is water or the low-boiling point solvent. The low-boiling point solvent is at least one kind selected from ethanol and methanol.
Abstract:
PURPOSE: A nano power generating element using a piezoelectric material and a rain sensing wiper controller are provided to produce energy in a vehicle itself to use as the power energy of the vehicle by converting physical energy like raindrop and wind to electric energy with a piezoelectric material. CONSTITUTION: A wiper controller comprises a piezoelectric element(10), an electric current sensing part(20), a comparator(30), and a wiper speed control part(40). The piezoelectric element is installed in a windshield of a vehicle to generate electric current. The electric current sensing part detects the amount of the electric current generating in the piezoelectric element. The comparator selects and outputs a specific signal by comparing a set value and the amount of the electric current detecting in the electric current sensing part. The wiper speed control part controls the speed of a wiper by comparing the set value and the value outputted from the comparator.