AFM studies on Langmuir-Blodgett films of cholesterol

Gupta, Raj Kumar; Suresh, K.A.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/2810

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DC Field	Value	Language
dc.contributor.author	Gupta, Raj Kumar	-
dc.contributor.author	Suresh, K.A.	-
dc.date.accessioned	2007-06-13T09:09:33Z	-
dc.date.available	2007-06-13T09:09:33Z	-
dc.date.issued	2004	-
dc.identifier.citation	European Physical Journal E, 2004, Vol.14, p35-42	en
dc.identifier.issn	1292-8941	-
dc.identifier.issn	1292-895X(Online)	-
dc.identifier.uri	http://hdl.handle.net/2289/2810	-
dc.description	Restricted Access.	en
dc.description.abstract	The Langmuir monolayer of cholesterol at the air-water interface exhibits a condensed phase in which the cholesterol molecules are aligned normal to the water surface. We have transferred the monolayer from water surface to different substrates by Langmuir-Blodgett (LB) technique and have studied their assembly by atomic force microscope (AFM). Our studies reveal that the aggregation of cholesterol molecules on hydrophobic surfaces leads to interesting structures. The cholesterol molecules assemble into a uniform film, elongated domains and uniformly distributed torus-shaped domains (doughnuts) for one, two and four cycles of deposition, respectively. Beyond four cycles, the molecules adsorb and desorb by an equal amount resulting in no further deposition. The formation of uniformly distributed doughnuts can be attributed to the hydrophobic interaction and reorganization of the molecules due to successive adsorption and desorption during deposition cycles. Our studies on hydrophilic surfaces show that cholesterol cannot form more than one layer of deposition.	en
dc.format.extent	1190691 bytes	-
dc.format.mimetype	application/pdf	-
dc.language.iso	en	en
dc.publisher	EDP Sciences, Società Italiana di Fisica, Springer-Verlag	en
dc.relation.uri	http://dx.doi.org/10.1140/epje/i2003-10088-4	en
dc.rights	2004 EDP Sciences, Società Italiana di Fisica, Springer-Verlag	en
dc.title	AFM studies on Langmuir-Blodgett films of cholesterol	en
dc.type	Article	en
Appears in Collections:	Research Papers (SCM)

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