Fig. 9

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(a) PDMS water droplet contact angle, (b) PDMS@SiO2 water droplet contact angle, (c) PDMS@SiO2/Fe3O4 water droplet contact angle, (d) PDMS scanning electron microscope image, (e) 50 wt% PDMS@SiO2 scanning electron microscope image, (f) 3.0 wt% PDMS@SiO2/Fe3O4 scanning electron microscope image.

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