What is Deposition (chemistry)?

Information about Deposition (chemistry)

In chemistry, deposition is the settling of particles (atoms or molecules) or sediment from a solution, suspension mixture or vapor onto a pre-existing surface. Deposition generally results in growth of new phase and is of fundamental importance in a large number of scientific disciplines and practical applications, the most obvious ones being in material science, geology, meteorology and chemical engineering.

The term is also widely used in earth science to describe the same process in a geological sense. Deposition of particles is an aggradational process — one that builds a landform — as opposed to a degradational process that erodes or reduces the size of a landform. For example, a river mouth delta is formed by deposition of sediment carried by the stream as the river current diminishes upon encountering the sea.

See also

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atom (Greek ἄτομος or átomos meaning "indivisible") is the smallest particle still characterizing a chemical element.
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molecule is defined as a sufficiently stable electrically neutral group of at least two atoms in a definite arrangement held together by strong chemical bonds.[1][2] In organic chemistry and biochemistry, the term molecule
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Sediment is any particulate matter that can be transported by fluid flow and which eventually is deposited as a layer of solid particles on the bed or bottom of a body of water or other liquid. Sedimentation is the deposition by settling of a suspended material.
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This article is about chemical solutions. For other uses, see Solution (disambiguation).
In chemistry, a solution is a homogeneous mixture composed of two or more substances.
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Suspension is a heterogenous fluid containing solid particles that are sufficiently large for sedimentation. Usually they must be larger than 1 micrometre [1]. Unlike colloids, suspensions will eventually settle. An example of a suspension would be sand in water.
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surface is a two-dimensional manifold. The most familiar examples are those that arise as the boundaries of solid objects in ordinary three-dimensional Euclidean space, E³.
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In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i.e. density, crystal structure, index of refraction, and so forth).
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Earth science (also known as geoscience, the geosciences or the Earth Sciences), is an all-embracing term for the sciences related to the planet Earth. It is arguably a special case in planetary science, the Earth being the only known life-bearing planet.
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Deposition is the geological process whereby material is added to a landform. This is the process by which wind and water create a deposit, through the laying down of granular material that has been eroded and transported from another geographical location.
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A landform comprises a geomorphological unit, and is largely defined by its surface form and location in the landscape, as part of the terrain, and as such, is typically an element of topography.
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river is a natural waterway that transits water through a landscape from higher to lower elevations. It is an integral component of the water cycle. The water within a river is generally collected from precipitation through surface runoff, groundwater recharge (as seen at baseflow
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delta is a landform where the mouth of a river flows into an ocean, sea, desert, estuary, lake or another river. It builds up sediment outwards into the flat area which the river's flow encounters (as a deltaic deposit
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The three-letter acronym SEA may refer to:
  • Scientists and Engineers for America, a pro-science political advocacy group.
  • Schoof-Elkies-Atkin algorithm
  • Seattle-Tacoma International Airport (IATA: SEA, ICAO: KSEA)
  • Sea Education Association

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Deposition is a process in which gas transforms into solid (also known as desublimation). The reverse of deposition is sublimation.

One example of deposition is the process by which, in sub-freezing air, water vapor changes directly to ice without first becoming a liquid.
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Thin-film deposition is any technique for depositing a thin film of material onto a substrate or onto previously deposited layers. "Thin" is a relative term, but most deposition techniques allow layer thickness to be controlled within a few tens of nanometers, and some (molecular
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Fouling refers to the accumulation and deposition of living organisms (biofouling) and certain non-living material on hard surfaces, most often in an aquatic environment. This can be the fouling of ships, pilings, and natural surfaces in the marine environment (marine fouling),
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