Measurement of Young’s modulus of carbon nanotubes by nanoprobe manipulation in a transmission electron microscope

Abstract

A method for quantifying the nanomechanics of nanomaterials was developed using a nanoprobe manipulator fitted into a transmission electron microscope. Apparent Young’s moduli of various carbon nanotubes (CNTs) were measured using this method. The apparent Young’s modulus of an arc-grown CNT is as large as approximately 3.3TPa, which is close to the theoretical Young’s modulus (5.5TPa) of the single-walled CNT simulated using molecular dynamics. The relationship between the apparent Young’s modulus and the crystallinity of CNTs is demonstrated using the crystallinity parameter ID∕IG derived by Raman spectroscopic analysis. The apparent Young’s modulus is higher for better crystallinity of CNT.

High performance PEEK/carbon nanotube composites compatibilized with polysulfones-I. Structure and thermal properties

“…Carbon nanotube (CNT) reinforced composites have attracted a great deal of interest for many applications due to their outstanding mechanical, electrical and thermal properties [1,2] arising from the nanoscale dimensions, excellent physics characteristics and exceptionally high aspect ratio of nanotubes [3,4]. Achieve a good dispersion of the reinforcement in the polymer matrix is the key to fabricate composites with enhanced properties; however, this is commonly a difficult task due to the strong tendency of the nanotubes to gather and form bundles.…”

Development and characterization of PEEK/carbon nanotube composites

“…In particular, the exceptional properties reported for carbon nanotubes [3,4] (CNTs) have motivated the development of new nanotube-based composites. In addition to their unique mechanical properties [5,6], which combined with their high aspect ratio and nanoscale dimensions makes them excellent candidates for composite reinforcement, they also possess superior thermal and electrical properties [7]. Therefore, polymer-nanotube composites are expected to have many potential applications in several fields: the addition of CNTs could improve thermal transport properties of the polymer, being useful as connectors, thermal interface materials and heat sinks.…”

Cross-sectional atomic force microscope in scanning electron microscope

“…Alternatively, the xAFM may be regarded as an advanced SEM/transmission electron microscope (TEM)-based manipulator. [11][12][13] In particular, the popular SEM manipulators currently used often handle two objects or probes in a similar fashion, as well as in a similar environment. In the simple arrangement, however, the tipsample distance is adjusted by the operator based upon SEM images.…”