Cho, Sanghyun Jung, Insub Zhahg, Liqiu Yoo, Sungjae Won, Ji Hye Jung, Sang Baek Liu, Lichun Park, Sungho 2024-01-19T19:02:02Z 2024-01-19T19:02:02Z 2021-10-21 2019-10-18 0957-4484 https://pubs.kist.re.kr/handle/201004/119437 In this work, we demonstrate the synthesis of edge-rich vertical multilayer graphene nanotube arrays and edge density-dependent capacitance in a supercapacitor application. We employ Ni-Au multi-block vertical nanotubes fabricated by anodic aluminum oxide template-assisted electrodeposition as a designer substrate for multilayer graphene growth. This edge generation of graphene relies on the distinct carbon solubility of Au and Ni under chemical vapor deposition. Therefore the graphene edge density is tailorable by controlling the total number of bimetallic interfaces of alternating electrodeposited Ni and Au blocks. In supercapacitor applications, we found that the capacitance heavily correlates to the graphene edge densities. Multilayer graphene nanotubes with 18 bimetallic interfaces exhibit 8.4 times higher capacitance than those without interfaces. This experimental evaluation shows great promise to significantly enhance the supercapacitor capacitance by creating high-density edges on multilayer graphene. English IOP PUBLISHING LTD HIGH-ENERGY RAMAN-SPECTROSCOPY CAPACITY IMPACT Synthesis of edge-rich vertical multilayer graphene nanotube arrays towards high-performance supercapacitors Article 10.1088/1361-6528/ab31e5 1 NANOTECHNOLOGY, v.30, no.42 NANOTECHNOLOGY 30 42 scie scopus 000479103300001 2-s2.0-85071345638 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Science & Technology - Other Topics Materials Science Physics Article HIGH-ENERGY RAMAN-SPECTROSCOPY CAPACITY IMPACT graphene edge anodic aluminum oxide electrodeposition supercapacitor bimetallic interface