Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/27939
Title: A study of hybrid carbon nanotubes - polymers microstructures
Authors: SIM MONG CHEA
Keywords: CNTs, polymer, microstructures, lithography, plastic substrate
Issue Date: 18-Jan-2011
Source: SIM MONG CHEA (2011-01-18). A study of hybrid carbon nanotubes - polymers microstructures. ScholarBank@NUS Repository.
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.
URI: http://scholarbank.nus.edu.sg/handle/10635/27939
Appears in Collections:Master's Theses (Open)

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