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Appearance, flexibility, and contact angle of 3-µm-thick Ti3C2Tx films. (A) Digital image of a free-standing Ti3C2Tx film with diameter of 40 mm. (B) To demonstrate the mechanical flexibility, a film was folded into the shape of a paper airplane. (C) Typical cross-sectional SEM image of a Ti3C2Tx film showing its layered structure of well-stacked Ti3C2Tx flakes. (D) Digital image of a water drop on a Ti3C2Tx film. The contact angle was measured to be 35°.
