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Title: Scanning probe microscopy study of adsorbed conjugated molecules
Authors: JIANG YAN
Keywords: Scanning Probe Microscopy (SPM), Molecular Electronics, Self-assembled Monolayer (SAM), Conjugated molecules, Adsorption, Insertion.
Issue Date: 2-Aug-2005
Citation: JIANG YAN (2005-08-02). Scanning probe microscopy study of adsorbed conjugated molecules. ScholarBank@NUS Repository.
Abstract: A study of the formation of self-assembled monolayers (SAM) of adsorbed organics has been undertaken to provide insight into the use of such SAM in future molecular electronic devices. Scanning Tunneling Microscopy (STM) and Atomic Force Microscopy (AFM) are used in a controlled liquid environment for the characterization. The set-up and method to measure local conductivity of surfaces using Conducting AFM is also described.SAMs formed by both physisorption and chemisorbtion are investigated. The physisorbed SAM consists of a conjugated molecule of 3 phenyl rings adsorbed on graphite. The chemisorbed SAMs consist of various alkanethiols and thiol terminated conjugated molecules adsorbed on the Au(111) surface. Molecular scale images of the both SAMs were obtained. Subsequently single isolated conjugated molecules are inserted into an inert alkanethiol matrix, which allows for the electrical properties of single conjugated molecules to be measured.
Appears in Collections:Master's Theses (Open)

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