title: Direct Preparation of Carbon Nanotube Intramolecular Junctions on Structured Substrates.
abstract: Leveraging the unique properties of single-walled carbon nanotube (SWNT) intramolecular junctions (IMJs) in innovative nanodevices and next-generation nanoelectronics requires controllable, repeatable, and large-scale preparation, together with rapid identification and comprehensive characterization of such structures. Here we demonstrate SWNT IMJs through directly growing ultralong SWNTs on trenched substrates. It is found that the trench configurations introduce axial strain in partially suspended nanotubes, and promote bending deformation in the vicinity of the trench edges. As a result, the lattice and electronic structure of the nanotubes can be locally modified, to form IMJs in the deformation regions. The trench patterns also enable pre-defining the formation locations of SWNT IMJs, facilitating the rapid identification. Elaborate Raman characterization has verified the formation of SWNT IMJs and identified their types. Rectifying behavior has been observed by electrical measurements on the as-prepared semiconducting-semiconducting (S-S) junction.
authors.affiliation: School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore.
authors.forename: Jianing
authors.initials: J
authors.lastname: An
authors.affiliation: Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 401122, P. R. China.
authors.forename: Zhaoyao
authors.initials: Z
authors.lastname: Zhan
authors.affiliation: Key Laboratory of Flexible Electronics &Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China.
authors.forename: Gengzhi
authors.initials: G
authors.lastname: Sun
authors.affiliation: School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore.
authors.forename: Hari Krishna Salila Vijayalal
authors.initials: HK
authors.lastname: Mohan
authors.affiliation: School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, P. R. China.
authors.forename: Jinyuan
authors.initials: J
authors.lastname: Zhou
authors.affiliation: School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore.
authors.forename: Young-Jin
authors.initials: YJ
authors.lastname: Kim
authors.affiliation: Department of Mechanical Engineering, Khalifa University of Science, Technology and Research, Abu Dhabi, 127788, United Arab Emirates.
authors.forename: Lianxi
authors.initials: L
authors.lastname: Zheng