A nanocrystalline material is a polycrystalline material with a crystallite size of only a few nanometers. These materials fill the gap between amorphous materials without any longe range order and crystalline materials with a clear three dimensional long range order.
X-ray diffraction is commonly used to determine the crystallinity of a material. When the crystallites of a polycrystalline material become very small, the diffraction signals become very wide. A material can be called nanocrystalline when the diffraction signals are too sharp to originate from an amorphous material but too wide to determine the crystal structure. The upper limit for the crystallite size of nanocrystalline materials is about 5 nm, the lower limit will be close to 0.5 nm.
Wikimedia Foundation. 2010.
Look at other dictionaries:
nanocrystalline — adjective Of, pertaining to, or composed of nanocrystals … Wiktionary
Nanocrystalline silicon — Main article: Silicon thin film cell Silicon nanopowder Nanocrystalline silicon (nc Si), sometimes also known as microcrystalline silicon (μc Si), is a form of porous silicon. It is an allotropic form of silicon wi … Wikipedia
Nanogeoscience — is the study of nanoscale phenomena related to geological systems. Predominantly, this is interrogated by studying environmental nanoparticles between 1 100 nanometers in size. Other applicable fields of study include studying materials with at… … Wikipedia
Grain boundary strengthening — (or Hall Petch strengthening) is a method of strengthening materials by changing their average crystallite (grain) size. It is based on the observation that grain boundaries impede dislocation movement and that the number of dislocations within a … Wikipedia
Dieter Gruen — Dieter M. Gruen, an internationally respected innovator[peacock term], is a senior scientist in the Materials Science Division at Argonne National Laboratory. He received B.S. (1944, cum laude) and M.S. (1947) degrees in chemistry from… … Wikipedia
Solar cell — A solar cell made from a monocrystalline silicon wafer … Wikipedia
ESAVD — (Electrostatic Spray Assisted Vapour Deposition) is a technique (developed by a company called IMPT) to deposit both thin and thick layers of a coating onto various substrates. In simple terms chemical precursors are sprayed across an… … Wikipedia
Synthetic diamond — Synthetic diamonds of various colors grown by the high pressure high temperature technique Synthetic diamond is diamond produced in a technological process; as opposed to natural diamond, which is created in geological processes. Synthetic… … Wikipedia
Cerium(IV) oxide — Cerium(IV) oxide … Wikipedia
Dye-sensitized solar cell — A selection of dye sensitized solar cells A dye sensitized solar cell (DSSC, DSC or DYSC) is a low cost solar cell belonging to the group of thin film solar cells. … Wikipedia