Abstract
Fabrication of highly ordered superstructures of single-walled carbon nanotubes (SWNTs) is of great interest for a wide range of potential applications. Here, we investigate the selective distribution of individually isolated SWNTs (1D nanoparticles with very large aspect ratios) in Pluronic P84/water/p-xylene ternary systems in a lamellar phase by contrast variation small-angle neutron scattering measurements. Hydrophilically functionalized SWNTs (p-SWNTs) with an aspect ratio of ca. 100 are mixed with P84/water/p-xylene systems prepared with two opposite neutron contrasts, a positive contrast for which the neutron scattering length density of the apolar domain is higher than that of the polar domain and a negative contrast for which the relative scattering length density is opposite. The neutron scattering intensity of the first-order Bragg peak, after correcting for the effect of p-SWNT-induced diffuse interface, increases with addition of p-SWNTs in the positive contrast samples and decreases in the n...
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