Single layer nano-tube can be considered as the perfect thin walled cylinder because of
the uniformity in thickness, accurate geometry and linear elastic material behavior. The
challenge is to test them to obtain strength, stiffness and stability properties. A number of
techniques are being developed to use electro-mechanical devices to induce force and
measure responses. The forces are measured in nano Newtons and the displacements are
measured in fractions of nano meters. Structural properties of single walled (single
layered) tubes, multi walled tubes and single wall bundled tubes are needed for effective
utilization of these materials in electronic and bio applications and development of
nano/micro composites. The following sections provide some basic information on
geometric dimensions and mechanical properties of carbon nano-tubes. Since this is a very active research area, the reader is advised to refer to latest journals for up to date
information.