Nanometre
From Wikinfo
| SI units | |
|---|---|
| 1×10−9 m | 1×10−3 μm |
| US customary / Imperial units | |
| 3.281×10−9 ft | 39.37×10−9 in |
- For criticism see Criticism of Nanometre
A nanometre (American spelling: nanometer, symbol nm) (Greek: νάνος, nanos, dwarf; μετρώ, metrό, count) is a unit of length in the metric system, equal to one billionth of a metre (i.e., 10-9 m or one millionth of a millimetre).
It is one of the more often used units for very small lengths, and equals ten Ångström, an internationally recognized non-SI unit of length. It is often associated with the field of nanotechnology. Formerly, millimicron (symbol mµ) was used for the nanometre. The symbol µµ has also been used [1][2][3].
It is also the most common unit used to describe the manufacturing technology used in the semiconductor industry. It is the most common unit to describe the wavelength of light, with visible light falling in the region of 400–700 nm. The data in compact discs is stored as indentations (known as pits) that are approximately 100 nm deep by 500 nm wide.
Contents |
Similar terms
Nanometry is the science of counting and measuring particles on the scale of nanometres.
The term nanoscale is used to refer to objects with dimensions on the order 1–100 nm. The term is often heard in relation to nanotechnology.
References
- ^ THE SVEDBERG and J. BURTON NICHOLS; “Determination of the size and distribution of size of particle by centrifugal methods”; Journal of the American Chemical Society; American Chemical Society, Washington, D.C.; December 1923; 45 (12): pp. 2910–2917.
- ^ THE SVEDBERG and HERMAN RINDE; “The ulta-centrifuge, a new instrument for the determination of size and distribution of size of particle in amicroscopic colloids”; Journal of the American Chemical Society; American Chemical Society, Washington, D.C.; December 1924; 46 (12): pp. 2677–2693.
- ^ KARL TERZAGHI; Erdbaumechanik auf bodenphysikalischer Grundlage; Franz Deuticke, Vienna, Austria / Leipzig, Germany; 1925 [Unaltered reproduction by G. Gistel & Cie., Vienna; 1976]; 399 pp. (page 32)
| This page uses content from Wikipedia. The original article was at Nanometre. The list of authors can be seen in the page history. The text of this Wikinfo article is available under the GNU Free Documentation License and the Creative Commons Attribution-Share Alike 3.0 license. |
See also
- 1 E-9 m
- SI prefix
- Orders of magnitude (length)
- Conversion of units, for comparison with other units of length
External links
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