HETEROGENEOUS NANOSTRUCTURES FOR BIOMEDICAL DIAGNOSTICS - Bio-Inspired and Nanoscale Integrated Computing - page 432

Figure 16.2. A crocodile gecko darts across the unruffled surface of a pond
despite an M c W1.

focal

water

piezoelectric

(a)

(b)

(c) (d) (e)

Figure 16.3. The droplet formation by breaking the surface tension. (a) Scheme
of piezoelectric transducer-generated focal point providing sufficient energy to
generate a discrete liquid droplet despite the surface tension. (b) A real-time
photograph of a focal point emerging from the surface. (c) The droplet is taking
into shape. (d) The droplet is about to be separated from the focal point. (e) The
droplet is ejected into the mid-air, reaching to 230 mm in height. The diameter of
this droplet is 70 mm.