IMEC, Belgium View Institution's Website 1 article published in JoVE Engineering Fabrication, Densification, and Replica Molding of 3D Carbon Nanotube Microstructures Davor Copic1, Sei Jin Park1, Sameh Tawfick1, Michael De Volder2, A. John Hart1 1Mechanosynthesis Group, Department of Mechanical Engineering, University of Michigan, 2IMEC, Belgium We present methods for fabrication of patterned microstructures of vertically aligned carbon nanotubes (CNTs), and their use as master molds for production of polymer microstructures with organized nanoscale surface texture. The CNT forests are densified by condensation of solvent onto the substrate, which significantly increases their packing density and enables self-directed formation of 3D shapes.