Fig. 8 | Nature Communications

Fig. 8

From: Strongly bound excitons in anatase TiO2 single crystals and nanoparticles

Fig. 8The alternative text for this image may have been generated using AI.

Ultrafast 2D UV spectroscopy of anatase TiO2 NPs and single crystals. a Normalised transient absorption (ΔA) spectra of RT colloidal solution of anatase TiO2 NPs at a fixed time-delay of 1 ps and for different pump photon energies (indicated in the figure). Each trace is normalised with respect to the minimum of the main feature at 3.88 eV. For comparison, the black trace shows the inverted steady-state absorption spectrum. b ΔA spectrum of RT anatase TiO2 single crystals along the a-axis and c-axis at a fixed time delay of 1 ps. For this experiment, the pump photon energy is 4.40 eV

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