Publication E. Viscoelasticity and High Buckling Stress of Dense Carbon Nanotube Brushes

Publication E - 126 - Publication E. Viscoelasticity and High Buckling Stress of Dense Carbon Nanotube Brushes Siddhartha Pathak, a,b Z. Goknur Cambaz, a Surya R. Kalidindi, a J. Gregory Swadener, c Yury Gogotsi a a Department of Materials Science and Engineering and A.J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, PA 19104, USA b Laboratory for Mechanics of Materials and Nanostructures, EMPA - Swiss Federal Lab for Materials Testing and Research, Thun, CH-3602, Switzerland c Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. Currently at: Engineering Systems & Management, Aston University, Aston Triangle, Birmingham B4 7ET, UK Carbon. 47, 2009, pg 1969-76. Abstract We report on the mechanical behavior of a dense brush of small-diameter (1-3 nm) non- catalytic multiwall (2-4 walls) carbon nanotubes (CNTs), with ~10 times higher density than CNT brushes produced by other methods. Under compression with spherical indenters of different radii, these highly dense CNT brushes exhibit a higher modulus (~17-20 GPa) and orders of magnitude higher resistance to buckling than vapor phase deposited CNT brushes or carbon walls. We also demonstrate the viscoelastic behavior, caused by the increased influence of the van der Waals’ forces in these highly dense CNT brushes, showing their promise for energy-absorbing coatings.

Publication E. Viscoelasticity and High Buckling Stress of Dense Carbon Nanotube Brushes

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