Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3556
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dc.contributor.authorNayak, Alpana-
dc.contributor.authorSuresh, K.A.-
dc.date.accessioned2008-06-10T11:25:09Z-
dc.date.available2008-06-10T11:25:09Z-
dc.date.issued2008-02-
dc.identifier.citationJournal of Physical Chemistry B, 2008, Vol.112, p2930-2936en
dc.identifier.issnE-ISSN: 1520-5207-
dc.identifier.issnP-ISSN: 1520-6106-
dc.identifier.urihttp://hdl.handle.net/2289/3556-
dc.descriptionRestricted Access.en
dc.description.abstractWe have studied films of an ionic discogenic (discotic mesogenic) molecule (pyridinium salt tethered with hexaalkoxytriphenylene (PyTp)) and DNA complex at air-water (A-W) and air-solid interfaces. We have formed an PyTp monolayer on an aqueous subphase containing a small amount of DNA to obtain a PyTp-DNA complex at the A-W interface. Compared to the pure PyTp monolayer, the PyTp-DNA complex monolayer exhibits a higher collapse pressure and lower limiting area, indicating condensation and better stability. A Brewster angle microscope was used for in situ observation of the morphology of the film at the A-W interface. The PyTp-DNA complex films on silicon wafers were prepared using the Langmuir-Blodgett (LB) technique. We find that several tens of layers of the PyTp-DNA complex monolayer can be transferred with good efficiency. Fourier transform infrared spectroscopy studies confirm the presence of DNA in the LB films of the PyTp-DNA complex. Nanoindentation measurements using atomic force microscope reveal that the PyTp-DNA complex films are about two times harder as compared to the pure PyTp films.en
dc.format.extent477994 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherAmerican Chemical Societyen
dc.relation.urihttp://dx.doi.org/10.1021/jp710084qen
dc.rights2008 American Chemical Societyen
dc.titleDiscogen - DNA complex films at air-water and air-solid interfacesen
dc.typeArticleen
Appears in Collections:Research Papers (SCM)

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