Faculty Advisor(s): Scott, Janes
Modification of Si(111) Surfaces using Self - Assembled Monolayers (SAMs) for Electrochemical and AFM Characterization
Recent researchers in the electrical engineering field are using self-assembled monolayers techniques with aryldiazonium salts solutions to build nanoelectronic devices. This innovation can explain the molecular conductivity and the chemical covalent bonds between π- conjugated orbitals of the organic molecules and silicon. For the preparation of surfaces, the silicon samples were cleaned with a specific procedure and then we made the reactions with nitrobenzenediazonium tetrafluoroborate solutions inside a glove box. The samples were immersed in three solutions with different concentrations (2mM, 5mM and 10mM) for 2 hrs to decide which one was the optimal concentration. The formation of the aryl(nitrobenzenediazonium tetrafluoroborate) – semiconductor (silicon) bond attachments were characterized by two different techniques such as: Cyclic Voltammetry and Atomic Force Microscopy (AFM).
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