Article ID Journal Published Year Pages File Type
9816867 Ultramicroscopy 2005 5 Pages PDF
Abstract
We report an approach for building a mass sensor based on multi-walled carbon nanotubes (MWCNT). We propose a method with a great potential for the positioning of MWCNTs based on self-assembly onto patterned hydrophilic areas. For the experiments ultra flat mica substrates covered with gold are used. The gold substrate is first covered with hydrophobic thiol molecules: octadecanthiol. The octadecanthiol molecules are then selectively removed from small areas by nanoshaving the gold substrate with the tip of an atomic force microscope (AFM) operating in contact mode. Hydrophilic thiols (2-mercaptoethanesulfonic acid) are then self-assembled onto the cleaned area. Next, the substrate, comprised of hydrophobic and hydrophilic areas, is immersed in MWCNTsdispersed in N, N-dimethylformamide. The MWCNTs are self-assembled on the hydrophilic areas.
Related Topics
Physical Sciences and Engineering Materials Science Nanotechnology
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