title: Inter-allotropic transformations in the heterogeneous carbon nanotube networks.
abstract: The allotropic transformations of carbon provide an immense technological interest for tailoring the desired molecular structures in the scalable nanoelectronic devices. Herein, we explore the effects of morphology and geometric alignment of the nanotubes for the re-engineering of carbon bonds in the heterogeneous carbon nanotube (CNT) networks. By applying alternating voltage pulses and electrical forces, the single-walled CNTs in networks were predominantly transformed into other predetermined sp2carbon structures (multi-walled CNTs and multi-layered graphitic nanoribbons), showing a larger intensity in a coalescence-induced mode of Raman spectra with the increasing channel width. Moreover, the transformed networks have a newly discovered sp2-sp3hybrid nanostructures in accordance with the alignment. The sp3carbon structures at the small channel are controlled, such that they contain up to about 29.4% networks. This study provides a controllable method for specific types of inter-allotropic transformations/hybridizations, which opens up the further possibility for the engineering of nanocarbon allotropes in the robust large-scale network-based devices.
authors.affiliation: Department of Energy Engineering, Gyeongnam National University of Science and Technology, Jinju, Gyeongnam 52725, South Korea. hyjung@gntech.ac.kr.
authors.forename: Hyun Young
authors.identifier: http://orcid.org/0000-0002-2264-9762
authors.initials: HY
authors.lastname: Jung
authors.affiliation: Future Environmental Research Center, Korea Institute of Toxicology, Jinju, Gyeongnam 52834, South Korea.
authors.forename: Sung Mi
authors.initials: SM
authors.lastname: Jung
authors.affiliation: Department of Energy Engineering, Gyeongnam National University of Science and Technology, Jinju, Gyeongnam 52725, South Korea. hyjung@gntech.ac.kr.
authors.forename: Dong Won
authors.initials: DW
authors.lastname: Kim
authors.affiliation: Department of Mechanical and Industrial Engineering, Northeastern University, Boston, Massachusetts 02115, USA. jungy@coe.neu.edu.
authors.forename: Yung Joon
authors.initials: YJ
authors.lastname: Jung