Unzipping Carbon Nanotubes at High Impact

Autor(es)

Ozden, Sehmus ^[1] ; Autreto, Pedro A. S. ^{[1, 2]} ; Tiwary, Chandra Sekhar ^{[1, 3]} ; Khatiwada, Suman ^[1] ; Machado, Leonardo ^[2] ; Galvao, Douglas S. ^[2] ; Vajtai, Robert ^[1] ; Barrera, Enrique V. ^[1] ; Ajayan, Pulickel M. ^[1]

Afiliação do(s) autor(es)

^[1] Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX 77005 - USA

^[2] Univ Estadual Campinas, Dept Appl Phys, BR-13083959 Campinas, SP - Brazil

^[3] Indian Inst Sci, Dept Mat Engn, Bangalore 560012, Karnataka - India

• Tipo de documento: Artigo Científico
• Fonte: Nano Letters; v. 14, n. 7, p. 4131-4137, JUL 2014.
• Citações Web of Science: 36

Resumo

The way nanostructures behave and mechanically respond to high impact collision is a topic of intrigue. For anisotropic nanostructures, such as carbon nanotubes, this response will be complicated based on the impact geometry. Here we report the result of hypervelocity impact of nanotubes against solid targets and show that impact produces a large number of defects in the nanotubes, as well as rapid atom evaporation, leading to their unzipping along the nanotube axis. Fully atomistic reactive molecular dynamics simulations are used to gain further insights of the pathways and deformation and fracture mechanisms of nanotubes under high energy mechanical impact. Carbon nanotubes have been unzipped into graphene nanoribbons before using chemical treatments but here the instability of nanotubes against formation, fracture, and unzipping is revealed purely through mechanical impact. defect (AU)

• Processo FAPESP: 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais
• Beneficiário: Munir Salomao Skaf
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs