316 Fabricate and evaluate nanostructured surface by carbon nanotubes for bio-analysis
Details
A nanostructured surface was designed and created by synthesizing Carbon Nanotubes (CNTs) on a plane substrate. Multi-walled carbon nanotubes (MWNTs) were synthesized on a Si/SiO_2 substrate by alcohol catalytic chemical vapor deposition (ACCVD). The MWNTs were vertically aligned on the surface, and the structure and characteristics of the surface, such as wettability, were evaluated. The surface with the MWNTs was also treated by coating with Au and subsequent plasma irradiation, in order to change the wettability from hydrophobic to hydrophilic. The results of wettability tests show that the surface with the MWNT film behaved as a super-hydrophobic surface before plasma treatment, but behaved as a super-hydrophilic surface after the plasma treatment. Furthermore, experiments using water droplets on the MWNTs and subsequent drying was carried out, and the resulting changes in the structure and characteristics of the MWNTs were evaluated using scanning electron microscopy (SEM). The MWNTs subjected to plasma treatment were found to clump together forming bundles after dropping water and drying; we found that the CNTs moved after the water was dropped on them.
