Figure 8.

Vertically aligned carbon nanotubes (VACNTs). (a) Scanning electron microscopy images of VACNTs grown by chemical vapor deposition and enclosed in a PDMS chamber.⁸⁴ Adapted with permission from ref (84). Copyright 2010 IEEE. (b) Increased capture via porous structures is a result of streamline manipulation and hydrodynamic resistance reduction, allowing for more collisions occurring at closer distances.⁸⁵ Adapted with permission from ref (85). Copyright 2012 The Royal Society of Chemistry. (c) Porous elements of varying diameters improve cell capture and allow more of the post to be active in capture when compared with a comparably size solid control pillar.⁸⁶ Adapted with permission from ref (86). Copyright 2011 John Wiley & Sons, Inc.