Figure 8
From: Structurally Coloured Secondary Particles Composed of Black and White Colloidal Particles
Photographs of the secondary particles with magnetite.
(a) Secondary particles composed of 360-nm silica particles with the addition of magnetite. (b) The secondary particles, composed of 360-nm silica particles with the addition of magnetite, were collected by applying an external magnetic field. (c) Flattened Janus secondary particles, characterised by one white side and one red side, composed of 280-nm silica particles (left) and 360-nm silica particles (right). (d) Flattened Janus secondary particles composed of 360-nm silica particles face the same direction in the presence of an external magnetic field.
