The structure of multilayer films of DNA-aliphatic amine is preparation technique dependent

L. I. Shabarchina, M. M. Montrel, G. B. Sukhorukov, B. I. Sukhorukov

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

The structures of DNA-hexadecylamine and DNA-hexadecyltrimethylammonium bromide multilayer films obtained by two different approaches: layer-by-layer (LbL) adsorption and Langmuir-Blodgett (LB) technique were compared. Interlayer distance and DNA conformation in these films were determined by small-angle X-ray scattering, infrared and ultraviolet spectroscopy. The following results were obtained: (1) X-ray diffractrograms of the films indicated a distinct layer structure; (2) the interlayer distances for LbL films were less than for LB-films, made from the same components and (3) the double stranded DNA was included into the DNA-hexadecylamine film as a single-stranded formation, whereas DNA in the DNA-hexadecyltrimethylammonium film retained its double-stranded form. Structural models of LbL and LB films were created.

Original languageEnglish
Pages (from-to)217-222
Number of pages6
JournalThin Solid Films
Volume440
Issue number1-2
DOIs
Publication statusPublished - 1 Sep 2003
Externally publishedYes

Keywords

  • Infrared spectroscopy
  • Langmuir-Blodgett films
  • X-ray scattering

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