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Kinetic plot for the anatase to rutile phase transformation in nanocrystalline TiO2 heated in air. Here, y = In [-Δ(Na/N0)/Δt]; Na is the anatase particle number, N0 the initial particle number, and t is time. The slope of the lines (2) indicates a second order dependence on the number of particles. (From ref. 46, reproduced by permission of the Editor.)
