Please use this identifier to cite or link to this item:
http://hdl.handle.net/2289/3556
Title: | Discogen - DNA complex films at air-water and air-solid interfaces |
Authors: | Nayak, Alpana Suresh, K.A. |
Issue Date: | Feb-2008 |
Publisher: | American Chemical Society |
Citation: | Journal of Physical Chemistry B, 2008, Vol.112, p2930-2936 |
Abstract: | We 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. |
Description: | Restricted Access. |
URI: | http://hdl.handle.net/2289/3556 |
ISSN: | E-ISSN: 1520-5207 P-ISSN: 1520-6106 |
Alternative Location: | http://dx.doi.org/10.1021/jp710084q |
Copyright: | 2008 American Chemical Society |
Appears in Collections: | Research Papers (SCM) |
Files in This Item:
File | Description | Size | Format | |
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2008 JPCB V112 p2930.pdf Restricted Access | Restricted Access | 466.79 kB | Adobe PDF | View/Open Request a copy |
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