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- W2317445449 abstract "Polyelectrolyte-stabilized polymer nanotubes with high rigidity are electro-optically characterized in the dilute and semidilute regimes. Nanotube alignment with the electric field and subsequent orientation relaxation in the absence of electric field are confirmed by optical microscopy, and a simple UV−vis electro-optical setup is used to detect the transient light transmittance. The effects of ionic strength, pulse duration, electric field strength, and particle concentration on particle alignment and orientation relaxation dynamics were systematically varied. The charge-dependent field-induced interfacial polarization, particularly the double layer polarization, plays a predominant role in the thin-walled nanotube alignment, which diminishes with increasing salt screening, approaching predictions for uncharged dielectric tubes. The experimentally obtained rotary diffusivity from nanotube orientation relaxation dynamics agrees with theoretical predictions, with negligible ionic strength effects, indicating the absence of salt-induced aggregation events. When the scaled particle concentration ϕ/ϕ* increases from 0.06 to 15, the alignment is slowed by crowding, whereas the measured collective rotary diffusion coefficient increases due to the gradient of orientation probability." @default.
- W2317445449 created "2016-06-24" @default.
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- W2317445449 date "2011-04-12" @default.
- W2317445449 modified "2023-09-25" @default.
- W2317445449 title "Electro-optics of Polymer Nanotube Dispersions" @default.
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- W2317445449 doi "https://doi.org/10.1021/jp108846t" @default.
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