Needle-free injections

Jet impacting a water droplet at U = 20 m/s

Front view of a jet impacting a droplet

Jet impacting a viscoelastic droplet

Droplet impact dynamics on solid surfaces

Smooth surfaces

Water spreading on a glass surface

Ethanol splashing on a glass surface

Water splashing and bouncing on a superhydrophobic surface

Rough surfaces

Water spreading on a rough surface

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Water splashing and bouncing on a rough superhydrophobic surface

Dielectrowetting

Water splashing and bouncing from a surface with an electrode without applied voltage.

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Water splashing is reduced and bouncing is supressed by applying a voltage of 1000 V

Droplet impact on textiles

Droplet captured in a textile after impact

Droplet penetrating a textile after impact