Carbon nanotubes,one dimensional fibrous structure,have emerged as one of the most important material in the field of nanotechnology. These nanostructures, have found applications in almost every field of science and technology. However, the major technological development in this field is impeded by lack of efficient and controllable manipulation (alignment and positioning) methods. This book explains two major efficient techniques, i.e. electric field and magnetic field assisted alignment of carbon nanotubes on solid substrates and between gold microelectrodes.