Abstract:
The present invention provides a method for preparing graphene by providing a reaction gas including a carbon source and heat onto a substrate, and reacting the same to form a graphene on the substrate, a graphene sheet formed by the method, and a device using the same.
Abstract:
The present invention relates to a hierarchical composite structure comprising an open cell graphene foam or graphene-like foam, wherein the graphene foam or graphene-like foam is coated with a conductive nanoporous spongy structure and wherein at least 10% v/v of the hollow of the pores of the graphene foam or graphene-like foam is filled with the conductive nanoporous spongy structure. The invention also relates to a process for preparing a hierarchical composite structure wherein a conductive nanoporous spongy structure is electrodeposited so as to coat the open-cell graphene foam or graphene-like foam and to partially fill the hollow of the pores of the graphene foam or graphene-like foam.
Abstract:
실리콘 양자점의 사이즈와, 그래핀의 도핑 농도의 제어를 통하여 광학적 특성 및 전기적 특성을 향상시킨 그래핀-실리콘 양자점 하이브리드 구조를 포함하는 포토 다이오드를 제공한다. 본 발명의 그래핀-실리콘 양자점 하이브리드 구조를 포함하는 포토 다이오드는 제작이 용이하고, 대면적 제작이 가능하며 자외선 영역에서 근적외선 영역까지 광검출 대역이 넓고, 선택적으로 흡수 에너지의 조절이 가능하다.
Abstract:
The present invention relates to a graphene film, which is obtainable by a method comprising the steps of: a) providing a substrate, b) epitaxially growing a metal layer on a surface of the substrate, c) optionally increasing the thickness of the metal layer obtained in step b) by growing a metal onto the epitaxially grown metal layer, d) peeling off the metal layer obtained in step b) or optionally in step c) from the substrate and e) depositing graphene onto at least a part of that surface of the metal layer obtained in step d), which was in contact with the substrate before the peeling off conducted in step d). Such a graphene film has a very high charge carrier mobility, namely, when measured on a SiO 2 substrate, of more than 1 1000 cm 2 /V-sec, of at least 15000 cm 2 /V-sec, of at least 20000 cm 2 /V-sec, of at least 25000 cm 2 / V-sec or even of at least 30000 cm 2 /V-sec.
Abstract:
A method comprising: providing graphene on a growth substrate; providing a target substrate on the graphene to form a first composite comprising the target substrate and graphene; and removing at least a portion of the first composite from the growth substrate.
Abstract:
Methods of delaminating a graphene film (60) from a metal substrate (50) are disclosed that substantially preserve the metal substrate. The methods include forming a support layer (80) on the graphene film and then performing an electrochemical process in an electrochemical apparatus (10). The electrochemical process creates gas bubbles (36) at the metal-film interface (64), thereby causing the delamination. The graphene film and support layer form a structure (86) that is collected by a take-up roller (120). The support layer and graphene structure are then separated to obtain the graphene film.
Abstract:
Technologies are generally described for a method and system configured effective to alter a defect area in a layer on a substrate including graphene. An example method may include receiving and heating the layer to produce a heated layer and exposing the heated layer to a first gas to produce a first exposed layer, where the first gas may include an amine. The method may further include exposing the first exposed layer to a first inert gas to produce a second exposed layer and exposing the second exposed layer to a second gas to produce a third exposed layer where the second gas may include an alane or a borane. Exposure of the second exposed layer to the second gas may at least partially alter the defect area.
Abstract:
A method for fabricating crystalline surface structures (4) on a template (1). The method comprises the steps of providing a template (1) into a reaction environment, wherein one or more elements (3) required for the formation of the crystalline surface structure (4) are contained within the template (1); heating the template (1) inside the reaction environment to increase the mobility of the element (3) within the template (1), and to increase the surface diffusion length of the element (3) on the template-environment interface; and activating the template (1) by altering the conditions within the reaction environment, to make the mobile element (3) slowly migrate towards the template-environment interface and to make the element (3) organize on the surface of the template (1) as a crystalline structure (4).