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==Background==
[[Image:Gecko Leaftail 1.jpg|thumb|right|300px|[[Gecko]] climbing glass using its natural [[seta]]]]
A gecko can hang on a glass surface using only one toe. This ability is attributed to [[van der Waals force]],<ref>[{{Cite web |url=http://www.clemson.edu/newsroom/articles/2009/august/geckos.php5 |title=Researchers discover how geckos know when to hold tight<!-- Bot generated title -->] |access-date=2009-11-08 |archive-date=2010-06-11 |archive-url=https://web.archive.org/web/20100611153743/http://www.clemson.edu/newsroom/articles/2009/august/geckos.php5 |url-status=dead }}</ref><ref>{{cite journal|last1=Autumn|first1=Kellar|author-link2=Metin Sitti|last2=Sitti|first2=Metin|last3=Liang|first3=Yiching A.|last4=Peattie|first4=Anne M.|last5=Hansen|first5=Wendy R.|last6=Sponberg|first6=Simon|last7=Kenny|first7=Thomas W.|last8=Fearing|first8=Ronald|last9=Israelachvili|first9=Jacob N. |last10=Full|first10=R. J.|year=2002|title=Evidence for van der Waals adhesion in gecko setae| journal=Proceedings of the National Academy of Sciences of the USA|volume=99|issue=19| pages=12252–12256|doi=10.1073/pnas.192252799|pmid=12198184|pmc=129431|bibcode=2002PNAS...9912252A |display-authors=3|doi-access=free}}</ref> although a more recent study suggests that water molecules of roughly monolayer thickness (present on virtually all natural surfaces) also play a role.<ref>{{cite journal |last1=Huber |first1=G. |last2=Mantz |first2=H. |last3=Spolenak |first3=R. |last4=Mecke |first4=K. |last5=Jacobs |first5=K. |last6=Gorb |first6=S. N. |last7=Arzt |first7=E. |year=2005 |title=Evidence for capillarity contributions to gecko adhesion from single spatula nanomechanical measurements| journal=Proceedings of the National Academy of Sciences of the USA |volume=102 |issue=45| pages=16293–16296 |doi=10.1073/pnas.0506328102 |pmid=16260737 |pmc=1283435 |bibcode=2005PNAS..10216293H |doi-access=free}}</ref>
==Developments==
| pmid = 17578915
| pmc =1904109
|bibcode = 2007PNAS..10410792G | doi-access = free
|bibcode = 2007PNAS..10410792G }}</ref> In 2008 researchers from the [[University of Dayton]] reported a gecko glue capable of supporting 100N/cm<sup>2</sup>, ten times the strength generated by a gecko's foot. The research also used carbon nanotubes, but included a curled end which allowed stronger binding but easy removal.<ref>{{Cite journal ▼}}</ref>
▲|bibcode = 2007PNAS..10410792G }}</ref> In 2008 researchers from the [[University of Dayton]] reported a gecko glue capable of supporting 100N/cm<sup>2</sup>, ten times the strength generated by a gecko's foot. The research also used carbon nanotubes, but included a curled end which allowed stronger binding but easy removal.<ref>{{Cite journal
| last1 = Qu | first1 = L.
| last2 = Dai | first2 = L.
| year = 2008
| pmid = 18845750
|bibcode = 2008Sci...322..238Q | s2cid = 9597020
|bibcode = 2008Sci...322..238Q }}</ref> [[DARPA|Defense Advanced Research Projects Agency]] (DARPA) has a project called "Z-Man" that is attempting to develop a fabric allowing soldiers to scale vertical walls while carrying a full combat load.<ref>{{cite web | url = http://www.darpa.mil/our_work/DSO/programs/Z_man.aspx | title = Z-man | publisher = [[DARPA]] | access-date = 2012-07-27 | last = Goodman | first = M | url-status = dead | archive-url = https://web.archive.org/web/20120806163801/http://www.darpa.mil/Our_Work/DSO/Programs/Z_Man.aspx | archive-date = 2012-08-06 }}</ref> In February 2012 [[Nitto Denko]] developed a version of gecko tape capable of sticking at temperatures between -150 and 500°[[Celsius|C]].<ref>{{cite press release|title=Nitto Denko's "Gecko Tape" achieves precise, contamination-free analysis service in the -150- 500°C range | publisher = [[Nitto Denko]] | date = 2012-02-24 | access-date = 2012-07-27 | url = http://www.nitto.com/news/20120224/index.html }}</ref>
==See also==
==References==
{{Reflist}}
==External links==
*[https://www.deepmateriales.com/ Semiconductor Adhesives]
[[Category:Adhesives]]
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