Figure 4
Strong attachment discovered on natural surfaces: (a) mosquito and its proboscis, (b) mantis and spines, (c) arrayed setae on insects, (d) strong attachments of creatures in wet environments, (e) mussel with its special adhesive proteins, (f) octopus vacuum suction, (g) hierarchical pillar array on the toe pad of a tree frog, and (h) insect adhesion with liquid capillarity