| Texto completo | |
| Autor(es): |
Fonseca, Alexandre F.
[1]
Número total de Autores: 1
|
| Afiliação do(s) autor(es): | [1] Univ Estadual Campinas, Appl Phys Dept, Inst Phys Gleb Wataghin, BR-13083970 Campinas, SP - Brazil
Número total de Afiliações: 1
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Physical Review B; v. 104, n. 4 JUL 1 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
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) | |
| Processo FAPESP: | 20/02044-9 - Simulação e modelagem de propriedades físicas de materiais |
| Beneficiário: | Alexandre Fontes da Fonseca |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |