Fig. 5: Ultrafast transient absorption/transmission spectra of MB/WO3-x/WSe2. | Nature Communications

Fig. 5: Ultrafast transient absorption/transmission spectra of MB/WO3-x/WSe2.

From: Ultrafast charge transfer in mixed-dimensional WO3-x nanowire/WSe2 heterostructures for attomolar-level molecular sensing

Fig. 5: Ultrafast transient absorption/transmission spectra of MB/WO3-x/WSe2.The alternative text for this image may have been generated using AI.

a Steady-state optical absorption spectra of MB/WO3-x/WSe2, MB/WSe2, WO3-x/WSe2, and WSe2. b Transient transmission curves of MB/WO3-x/WSe2 at a fixed delay time t = 1.5 ps with a pump wavelength of 532 nm. The dashed zero lines are shifted together with the corresponding data curves. c Transient transmission images of MB/WO3-x/WSe2 with different pump wavelengths of 532 nm, 633 nm, and 750 nm. The time-dependent curves at 690 nm and 750 nm are in red and blue, respectively. The black arrow depicts the charge transfer timescale of about 1.0 ps. d, e Secondary derivative images with respect to the wavelength (d) and the delay time (e), corresponding to the original data in (c). The gray solid curves in (d) are wavelength-dependent data at 1.5 ps, plotted with the dashed zero lines. Full comparisons are shown in Supplementary Fig. 47.

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