Kim, Won-Jun Debnath, Pulak C. Lee, Junsu Lee, Ju Han Lim, Dae-Soon Song, Yong-Won 2024-01-20T11:32:40Z 2024-01-20T11:32:40Z 2022-01-10 2013-09-13 0957-4484 https://pubs.kist.re.kr/handle/201004/127666 Multilayer graphene is synthesized by a simplified process employing an evaporator in which a target substrate is deposited with a Ni catalyst layer before being heated to grow graphene directly. Carbon atoms adsorbed onto the surface of the Ni source as impurities from the atmosphere are incorporated into the catalyst layer during the deposition, and diffuse toward the catalyst/substrate interface, where they crystallize as graphene with a thickness of less than 2 nm. The need for a transfer process and external carbon supply is eliminated. The graphene is characterized by conventional analysis approaches, including nano-scale visualization and Raman spectroscopy, and utilizing photonics, graphene-functionalized passive laser mode-locking is demonstrated to confirm the successful synthesis of the graphene layer, resulting in an operating center wavelength of 1569.4 nm, a pulse duration of 1.35 ps, and a repetition rate of 31.6 MHz. English IOP PUBLISHING LTD LAYER GRAPHENE SATURABLE ABSORBER BILAYER GRAPHENE DIRECT GROWTH CARBON FILMS Transfer-free synthesis of multilayer graphene using a single-step process in an evaporator and formation confirmation by laser mode-locking Article 10.1088/0957-4484/24/36/365603 1 NANOTECHNOLOGY, v.24, no.36 NANOTECHNOLOGY 24 36 scie scopus 000323379500009 2-s2.0-84882934156 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Science & Technology - Other Topics Materials Science Physics Article LAYER GRAPHENE SATURABLE ABSORBER BILAYER GRAPHENE DIRECT GROWTH CARBON FILMS graphene transfer-free single-step process evaporator mode-locking