"This work involves the photosensitization of photorefractive polymeric composites through the inclusion of multiwalled and singlewalled carbon nanotubes grafted to poly(N-vinyl carbazole). The photorefractive nature of the holograms gratings was established using two-beam-coupling, yielding two-beam-coupling gain coefficients approaching 80 cm⁻¹. Degenerate-four-wave-mixing experiments exhibited diffraction efficiencies as high as 60% as well as over-modulation voltages as low as ~ 40 V/µm. These notable figures of merit indicate that the grafting of the various carbon nanotubes to the poly(N-vinyl carbazole) polymer resulted in enhanced photorefractive performance. The mechanism responsible for this enhancement in photorefractive performance is investigated using a variety of experimental techniques demonstrating that an increase in carbon nanotubes solubility resulting from the adornment with poly (N-vinyl carbazole) is primarily responsible for the observed improvement"--Abstract, page iv.
Wang, Jee C.
Winiarz, Jeffrey G.
Neogi, P. (Partho), 1951-
Chemical and Biochemical Engineering
M.S. in Chemical Engineering
Missouri University of Science and Technology
x, 76 pages
© 2010 Naveen Kumar Lingam, All rights reserved.
Thesis - Open Access
Nanotubes -- Carbon content
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Lingam, Naveen Kumar, "Enhanced photorefractivity in a polymeric composite photosensitized with modified carbon nanotubes" (2010). Masters Theses. 5292.