In addition to microposts and the block and post microfluidic device, platelets have been studied on nanoposts. (A) Nanoposts allow forces from a single platelet to be measured at many different locations. The image from scanning electron microscopy depicts several nanoposts under a single platelet (green). Side view (B) and top view (C) of a platelet on nanoposts. The white arrows represent force vectors, the green is an F-actin label, the red is the posts. (D) Platelet force was inhibited when platelets were treated with antibodies AK2, 7E3 and AK2 and 7E3 to block GPIbα, αIIbβ3, and both receptors respectively to examine how they contribute to the transmission of platelet forces. Adapted with permission.[71] Copyright 2016, Elsevier.