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York R. Smith,David Heermance,Ryan N. Smith 한국유변학회 2016 Korea-Australia rheology journal Vol.28 No.1
The effect of illumination on the viscosity of titania suspensions in silicone oil (insulating medium) and an aqueous buffer (conducting medium) was investigated. Commercially available P25 anatase titania was suspended at a volume fraction of 0.5%. A 12.3% increase in viscosity was observed when silicone oil suspension was used as the medium, while a 2.47% decrease in viscosity was observed for the aqueous buffer suspension after exposure to UV-vis irradiation. The capability of the suspension medium to scavenge photoinduced charges results in the observed photorheological effects. The results presented here demonstrate a new method for influencing the rheological properties of nanoparticle suspensions.