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Title: Fabrication of nanostructures using atomic force microscope assisted nanolithography
Keywords: Scanning probe lithography, electroactive polymer, atomic force microscope, electrochemical Nanolithography, conductive AFM, electropolymerization.
Issue Date: 28-Nov-2007
Citation: SUBBIAH JEGADESAN (2007-11-28). Fabrication of nanostructures using atomic force microscope assisted nanolithography. ScholarBank@NUS Repository.
Abstract: Fabrication of nanostructure with polymeric materials has attracted great attention due to its importance in many applications such as molecular electronics, data storage, optoelectronics and nanosensors. In this thesis, we focus on the patterning of various organic surfaces including polymers and oligomers to develop functional nanostructures using AFM (Atomic Force Microscope) assisted nanolithography. Here, we take advantage of the nano manipulation ability of AFM probe to fabricate nanostructure on polymer films together with the biased nano probe. Nanopattern formation has been explored on polymer/oligomer film using electrochemical/electrostatic nanolithography and the physical and chemical properties of the patterns are investigated. In electrochemical nanolithography, electroactive polymers were employed to develop conducting nanopattern from insulating polymers, and the conductivity and thermal stability of the nanopatterns were explored. In another approach, the surface effect of the polymer film on water meniscus formation between the AFM tip and surface are studied using electrostatic nanolithography. The formation of nanostructure on the polymer films such as polymethacrylic acid, polymethacrylate and polyacrylicacid were studied and the optimization of the conditions for nanopatterning of the polymer films were investigated with respect to the applied potential and translational speed of the AFM tip.
Appears in Collections:Ph.D Theses (Open)

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