Jeong, Seojeong Lee, Jaegeun Kim, Hwan-Chul Hwang, Jun Yeon Ku, Bon-Cheol Zakharov, Dmitri N. Maruyama, Benji Stach, Eric A. Kim, Seung Min 2024-01-20T05:04:50Z 2024-01-20T05:04:50Z 2021-09-03 2016-01 2040-3364 https://pubs.kist.re.kr/handle/201004/124584 In this study, we develop a new methodology for transmission electron microscopy (TEM) analysis that enables us to directly investigate the interface between carbon nanotube (CNT) arrays and the catalyst and support layers for CNT forest growth without any damage induced by a post-growth TEM sample preparation. Using this methodology, we perform in situ and ex situ TEM investigations on the evolution of the morphology of the catalyst particles and observe the catalyst particles to climb up through CNT arrays during CNT forest growth. We speculate that the lifted catalysts significantly affect the growth and growth termination of CNT forests along with Ostwald ripening and sub-surface diffusion. Thus, we propose a modified growth termination model which better explains various phenomena related to the growth and growth termination of CNT forests. English ROYAL SOC CHEMISTRY IN-SITU OBSERVATIONS WATER MECHANISM CONDUCTIVITY STRENGTH KINETICS Direct observation of morphological evolution of a catalyst during carbon nanotube forest growth: new insights into growth and growth termination Article 10.1039/c5nr05547d 1 NANOSCALE, v.8, no.4, pp.2055 - 2062 NANOSCALE 8 4 2055 2062 scie scopus 000368860900035 2-s2.0-84955492265 Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Chemistry Science & Technology - Other Topics Materials Science Physics Article IN-SITU OBSERVATIONS WATER MECHANISM CONDUCTIVITY STRENGTH KINETICS Carbon Nanotube Array Growth termination Lifted Catalysts In-situ TEM