Editing Structural engineering (section)

===Nanoscale structures===
A [[nanostructure]] is an object of intermediate size between molecular and microscopic (micrometer-sized) structures. In describing nanostructures it is necessary to differentiate between the number of dimensions on the nanoscale. Nanotextured surfaces have one dimension on the nanoscale, i.e., only the thickness of the surface of an object is between 0.1 and 100&nbsp;nm. [[Nanotube]]s have two dimensions on the nanoscale, i.e., the diameter of the tube is between 0.1 and 100&nbsp;nm; its length could be much greater. Finally, spherical [[nanoparticles]] have three dimensions on the nanoscale, i.e., the particle is between 0.1 and 100&nbsp;nm in each spatial dimension. The terms nanoparticles and ultrafine particles (UFP) often are used synonymously although UFP can reach into the micrometer range. The term 'nanostructure' is often used when referring to magnetic technology.