| Full text | |
| Author(s): |
Fonseca, Alexandre F.
[1]
Total Authors: 1
|
| Affiliation: | [1] Univ Estadual Campinas, Appl Phys Dept, Inst Phys Gleb Wataghin, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | Physical Review B; v. 104, n. 4 JUL 1 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
The common sense regarding twisting or untwisting a ribbon is that it requires the application of an external rotation to happen. However, at nanoscale, the application of precise amounts of rotation on a nanoribbon is not a trivial task. Here, the concept of an alternative method to add twist to or remove twist from a twisted graphene nanoribbon (TGNR) without rotation is presented and computationally demonstrated. The method consists of suspending a TGNR on two separate substrates and, by changing only their distance, the total amount of twist of the TGNR is shown to change. The possibility of fine-tuning the amount of twist of a TGNR is also shown. The concept is demonstrated through fully atomistic molecular dynamics simulations and numerical calculations of the topological parameters twist and writhe of a TGNR. It is shown that the above process satisfies the so-called linking number theorem of space curves. Besides being capable of precisely determining the total twist of a TGNR, this concept reveals a twist to writhe transition phenomenon that is tension-free and does not require controlling either the nanoribbon end-to-end distance or its critical twist density. (AU) | |
| FAPESP's process: | 20/02044-9 - Modeling and simulation of physical properties of materials |
| Grantee: | Alexandre Fontes da Fonseca |
| Support Opportunities: | Regular Research Grants |