Fig. 4: Microrobot approaches for overcoming long-range tumour-targeting challenges.
From: Engineering microrobots for targeted cancer therapies from a medical perspective
a Magnetic field (left) and light (right) steering approaches applicable for in vivo applications. b Exploiting physiological travel routes: Left: sperm microrobots in female reproductive tract; tissues relevant for a variety of cancers are highlighted. Right: RBCs and leucocytes travel through vessels that connect and supply tumour tissues. c Resisting and exploiting harsh physiological environments: chemically actuated microrobots have a neutralising effect on the acidic environment inside the stomach lumen. Aq aqueous, g gaseous, RBCs red blood cells.
