A study of hybrid carbon nanotubes - polymers microstructures

Abstract

Three-dimensional carbon nanotubes microstructures (CNTs) can be fabricated in many ways. In this work, we examined two ways of creating 3-D microstructures and then proceed to modify and characterize some of their properties. The first method of creating large scale array of CNT microstructures is to use the laser pruning technique. A focused laser beam is impinged directly onto a CNT sample which is then patterned as it moves according to a computer programme. The second method is a novel direct writing technique called the Scanning Localized Arc Discharge Lithography (SLADL). A sharp tungsten tip with a bias voltage is used to cut patterns on a CNTs sample. The CNTs after the current cut is subjected to examination via several characterization methods. A way of transferring microstructures is also discussed. Patterned CNTs microstructures can be transferred from the Si substrate to various substrates such as glass and plastic coated with a metallic nanolayer. We also study a way of reinforcing the CNTs microstructures by imbibing the structures in Polydimethylsiloxane (PDMS). The resulting CNTs-polymer hybrid system is systematically studied using several characterizing techniques. The resulting hybrid microstructures showed an increase in the tensile strength, flexibility and elasticity.