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Fabrication of superhydrophobic and superhydrophilic surfaces for biomicrofluidics applications

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Fabrication of superhydrophobic and superhydrophilic surfaces for biomicrofluidics applications

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The exciting functionalities of naturally superhydrophobic and superhydrophilic surfaces, e.g. the extreme water repellency of the lotus flower, has served as inspiration for a variety of biomimetic designs. In recent years it has been successfully demonstrated that both hydrophobic and hydrophilic surfaces can be fabricated by femtosecond laser machining. Figure 1 compares the SEM images of a rose petal surface and a superhydrophobic surface machined on polypropylene using Spirit® One™ femtosecond laser from Spectra-Physics® . The imitation of the surface morphology leads to one-to-one reproduction of the wetting properties of rose petals. In particular, it was possible to fabricate superhydrophobic polypropylene surfaces which exhibits non-sticky behavior.

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