Fig. 2 | Nature Communications

Fig. 2

From: Water printing of ferroelectric polarization

Fig. 2

Aqueous-solution-induced reversal of whole film polarization. a Photograph of water treatment process and the corresponding sample size is 10 × 10 mm2 (inset). The polarizations of the whole films reversed to the upward (b) and downward (c) after exposing the film to Milli-Q water and acidic solution, respectively. The corresponding PFM images showing the polarization switching from downward/upward to upward/downward after Milli-Q water (d) and acidic-solution (e) treatments. Scale bar, 2 μm (d, e)

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