Effect of nanofiber proximity on the mechanical behavior of high volume fraction aligned carbon nanotube arrays

Cebeci H. , STEIN I. Y. , WARDLE B. L.

APPLIED PHYSICS LETTERS, vol.104, no.2, 2014 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 104 Issue: 2
  • Publication Date: 2014
  • Doi Number: 10.1063/1.4862273
  • Title of Journal : APPLIED PHYSICS LETTERS


The effect of nanofiber proximity on the mechanical behavior of nanofiber arrays with volume fractions (V-f) from 1% to 20% was quantified via nanoindentation of an aligned carbon nanotube (A-CNT) array. The experimental results show that the indentation modulus for A-CNT arrays has a highly non-linear scaling with the CNT V-f, leading to modulus enhancements of up to similar to 600x at V-f = 20%. Modeling illustrates that the origin of the highly non-linear trend with V-f is due to the minimum inter-CNT spacing, which is shown to be more than an order of magnitude larger than the graphitic spacing. (C) 2014 AIP Publishing LLC.