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- W1974688081 abstract "Absorption spectroscopy in the ultraviolet-visible-near infrared (UV-Vis-NIR) wavelength region has been used to quantify the aggregation factor of single-walled carbon nanotubes (SWCNTs) in liquid media through a series of controlled experiments. SWCNT bundles are dispersed in selected solvents using a calibrated ultrasonicator, which helps in determining the true amount of energy used in the exfoliation process. We also establish the selectivity of the centrifugation process, under the conditions used, in removing the nanotube aggregates as a function of the sonication time and the dispersion solvent. This study, along with the calibration of the sonication process, is shown to be very important for measuring the true aggregation factor of SWCNTs through a modified approach. We also show that the systematic characterization of SWCNT dispersions by optical spectroscopy significantly contributes to the success of dielectrophoresis (DEP) of nanotubes at predefined on-chip positions. The presence of individually dispersed SWCNTs in the dispersions is substantiated by dielectrophoretic assembly and post-DEP electromechanical measurements." @default.
- W1974688081 created "2016-06-24" @default.
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- W1974688081 date "2014-04-29" @default.
- W1974688081 modified "2023-10-02" @default.
- W1974688081 title "Quantifying the Aggregation Factor in Carbon Nanotube Dispersions by Absorption Spectroscopy" @default.
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- W1974688081 doi "https://doi.org/10.1155/2014/328627" @default.
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