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Multi-walled carbon nanotubes (MWCNTs) have been used to improve the lifetime of electrical contacts of MEMS switches. The surface, usually gold-coated, demonstrates a complex structure. Due to the space between vertically aligned nanotubes, the sputtered gold penetrates into CNT. The surface of the composite also presents a much higher roughness than metal-coated surfaces. This work investigates...
Controlled surface wrinkling could provide ordered and hierarchical structures in micro- and nano-meter scale. Here combined influence of out-of-plane compressive stress and in-plane substrate relief in Au/PDMS bilayer system was experimentally investigated to explore morphological evolution of surface wrinkling. Compared with single influence from out-of-plane compression or in-plane relief, the...
In this study, bottom contact OFETs with various surface treatments based on 1, 4, 5, 8-naphthalene-teracarboxylic di-imide (NTCDI) derivatives with three different fluorinated N-substituents, systematically investigated with a particular emphasis on the interplay between the morphology of the organic semiconductor films and the electrical device properties. The topography of the NTCDI bottom contact...
Highly oriented polytetrafluoroethylene (HOPTFE) was prepared by friction-transfer method on glass substrates under uniform deposition conditions. The distribution of finely divided HOPTFE macromolecular ridges was investigated by atomic force microscopy, pointing out that HOPTFE molecular films may induce topographically directed self-assembly processes. Furthermore, on the basis of their surface...
The photocurrent of Schottky diodes (Au/GaAs) with different type of interface (diffraction gratings, quasigratings, with Au/SiO2 core-shell nanoparticles) has been studied. Significant contribution of surface plasmon-polaritons and local electromagnetic modes has been shown in all cases by analysis of experimental spectral dependencies of photocurrent and theoretical calculations of light transmittance...
Capacitive humidity sensors were fabricated using countersunk interdigitated electrodes coated with amorphous nanostructured TiO2, SiO2, and Al2O3 thin films grown by glancing angle deposition. The capacitive response and response times for each sensor were measured. The sensor utilizing TiO2 exhibited the largest change in capacitance, increasing exponentially from ~ 1 nF to ~ 1muF for an increase...
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