View source for Bilayer

{{Short description|Double layer of closely packed atoms or molecules}}
{{More references|date=December 2009}}
A '''bilayer''' is a double layer of closely packed [[Atom|atoms]] or [[Molecule|molecules]].

The properties of bilayers are often studied in [[condensed matter physics]], particularly in the context of [[semiconductor device]]s, where two distinct materials are united to form [[junction (physics)|junction]]s, such as [[p–n junction]]s, [[Schottky junction]]s, etc. Layered materials, such as [[graphene]], [[boron nitride]], or [[transition metal dichalcogenide]]s, have unique electronic properties as bilayer systems and are an active area of current research.<ref>{{cite journal |doi=10.1126/science.1194975|pmid=21292974|title=Two-Dimensional Nanosheets Produced by Liquid Exfoliation of Layered Materials|journal=Science|volume=331|issue=6017|pages=568–571|year=2011|last1=Coleman|first1=J. N|last2=Lotya|first2=M|last3=O'Neill|first3=A|last4=Bergin|first4=S. D|last5=King|first5=P. J|last6=Khan|first6=U|last7=Young|first7=K|last8=Gaucher|first8=A|last9=De|first9=S|last10=Smith|first10=R. J|last11=Shvets|first11=I. V|last12=Arora|first12=S. K|last13=Stanton|first13=G|last14=Kim|first14=H.-Y|last15=Lee|first15=K|last16=Kim|first16=G. T|last17=Duesberg|first17=G. S|last18=Hallam|first18=T|last19=Boland|first19=J. J|last20=Wang|first20=J. J|last21=Donegan|first21=J. F|last22=Grunlan|first22=J. C|last23=Moriarty|first23=G|last24=Shmeliov|first24=A|last25=Nicholls|first25=R. J|last26=Perkins|first26=J. M|last27=Grieveson|first27=E. M|last28=Theuwissen|first28=K|last29=McComb|first29=D. W|last30=Nellist|first30=P. D|display-authors=29|hdl=2262/66458|bibcode=2011Sci...331..568C|url=http://www.tara.tcd.ie/bitstream/2262/66458/1/Coleman%20Science%202011%20%282%29.pdf|hdl-access=free}}</ref>

In biology, a common example is the [[lipid bilayer]], which describes the structure of multiple organic structures, such as the membrane of a cell.<ref>{{Citation |last=Alberts |first=Bruce |title=The Lipid Bilayer |date=2002 |url=https://www.ncbi.nlm.nih.gov/books/NBK26871/ |work=Molecular Biology of the Cell. 4th edition |access-date=2023-12-21 |publisher=Garland Science |language=en |last2=Johnson |first2=Alexander |last3=Lewis |first3=Julian |last4=Raff |first4=Martin |last5=Roberts |first5=Keith |last6=Walter |first6=Peter}}</ref>

==See also==
* [[Monolayer]]
* [[Non-carbon nanotube]]
* [[Semiconductor]]
* [[Thin film]]

==References==
<references />

[[Category:Phases of matter]]
[[Category:Thin films]]


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