Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/325851
Type: Artigo
Title: Mechano-chemical Stabilization Of Three-dimensional Carbon Nanotube Aggregates
Author: Koizumi
Ryota; Hart
Amelia H. C.; Brunetto
Gustavo; Bhowmick
Sanjit; Owuor
Peter S.; Hamel
John T.; Gentles
Anieph X.; Ozden
Sehmus; Lou
Jun; Vajtai
Robert; Asif
S. A. Syed; Galvao
Douglas S.; Tiwary
C. S.; Ajayan
P. M.
Abstract: Here we report a combined study of experiments and simulations to understand how chemical functional groups can mechanically stabilize aggregates of carbon nanotubes (CNTs). Ultralow density aggregates of chemically functionalized CNTs, in the form of macro-scale spheres made by freeze-drying method, show mechanical stabilization and near complete elastic recovery during deformation. Simulations of interacting functionalized carbon nanotube aggregates show better structural retention compared to non-functionalized CNTs under compression, suggesting that the atomic-level interactions between functional groups on adjoining CNTs help maintain structural rigidity and elastic response during loading. Aggregates of non-functionalized CNTs collapses under similar loading conditions. The dynamic mechanical responses of CNT macrostructures and mechano-chemical stabilization are directly observed using in-situ deformation inside a scanning electron microscope. (C) 2016 Elsevier Ltd. All rights reserved.
Editor: Pergamon-Elsevier Science LTD
Oxford
Rights: fechado
Identifier DOI: 10.1016/j.carbon.2016.08.085
Address: http://www-sciencedirect-com.ez88.periodicos.capes.gov.br/science/article/pii/S0008622316307400
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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