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- W2079165562 abstract "The hydrodynamic properties of surfactant encapsulated single-walled carbon nanotubes (SWNTs) have been characterized by optically measuring their spatial and temporal redistribution in situ in an analytical ultracentrifuge. The measured redistribution profiles are fit to the Lamm equation, thus determining the sedimentation, diffusion, and hydrodynamic frictional coefficients of the surfactant encapsulated SWNTs. For sodium cholate encapsulated SWNTs, we demonstrate that the technique of analytical ultracentrifugation can be utilized to determine the linear packing density of surfactant molecules along the length of the SWNTs, 3.6 ± 0.8 nm−1, and the anhydrous molar volume of the surfactant molecules on the SWNT surfaces, 270 ± 20 cm3 mol−1. Additionally, analytical ultracentrifugation is used to measure and compare the sedimentation rates of bundled and isolated carbon nanotubes. This study should serve as a guide for designing centrifuge-based processing procedures for preparing samples of SWNTs for a wide variety of applications and studies. Additionally, the results obtained here should aid in understanding the hydrodynamic properties of SWNTs and the interactions between SWNTs and surfactants in aqueous solution." @default.
- W2079165562 created "2016-06-24" @default.
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- W2079165562 date "2008-10-03" @default.
- W2079165562 modified "2023-10-10" @default.
- W2079165562 title "Hydrodynamic Characterization of Surfactant Encapsulated Carbon Nanotubes Using an Analytical Ultracentrifuge" @default.
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- W2079165562 doi "https://doi.org/10.1021/nn800512t" @default.
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