Nanotechnology Flashcards
the manipulation of matter on a near-atomic scale to produce new structures, materials and
devices.
nanotechnology
it means one billionth
nano
a multidisciplinary field of science, engineering, and technology that deals with the manipulation of matter at the nanoscale, typically involving structures, devices, or systems with at least one dimension sized from 1 to 100 nanometers (nm).
Nanotechnology
materials where the sizes of the individual building blocks are less than 100 nm, at least in one dimension.
nanomaterials
involves the breaking down of the bulk material into
nanosized structures or particles.
Top-down approach
inherently simpler and depend either on removal or division of bulk material processes to produce the desired structure with appropriate properties.
Top-down approach
extension of those that have been used for producing micron sized particles.
Top-down synthesis techniques
Biggest problem of top-down approach
imperfection of surface structure
refers to the build up of a material from the bottom: atom-by-atom, molecule-by-molecule, or cluster-by cluster
Bottom-up approach
used as the building blocks to produce nanoparticles, nanotubes, or nanorods, or thin films or layered structures.
Atoms/Molecules
Many of these techniques are still under development or are just beginning to be used for
commercial production of nanopowders.
Bottom-up approach
three basic types of nanocomposite.
zero-dimensional
one-dimensional
two-dimensional
consists of nanotubes or nanorods distributed in a second matrix.
one-dimensional nanocomposite
built from stacks of thin films made of two or more different materials.
Two-dimensional nanocomposite
this type of composite is generally made via a self-organization processes.
Perfectly ordered zero-dimensional nanocomposite;
