Fig. 3: Fission and fusion scenarios.
From: Exploiting ferrofluidic wetting for miniature soft machines
a Stretching and jumping. a and b represent the length and width, respectively. Ferrofluid droplets exhibiting stretching and jumping postures under 1D oscillating fields Bs(t) and Bj(t), respectively. Bs(t): frequency f = 1 Hz and magnitude Bm = 9 mT. Bj(t): f = 100 Hz and Bm = 9 mT. b Under a 2D oscillating magnetic field BOsc(t), one ferrofluid droplet splits into eight tiny droplets along a line and subsequently fuses. BOsc(t): f = 25 Hz and AO = CO = 9 mT. c Under a 3D wavy magnetic field BWav(t), one ferrofluid droplet splits into seventeen microdroplets onto the plane and subsequently fuses. The yellow rectangle represents the substrate in the side view. All the substrates are made of hydrogel. Scale bars, 2 mm.
