Semiconductor Physics, Quantum Electronics & Optoelectronics. 2003. V. 6, N 1. P. 105-108.

PACS: 78.67.Ch, 82.80.Gk

Study of DNA interaction with carbon nanotubes
G.I. Dovbeshko1, O.P. Repnytska1, E.D. Obraztsova2, Ya.V. Shtogun3, E.O. Andreev1


1
Institute of Physics, NASciences of Ukraine, 46 prospect Nauky, 03028 Kiev, Ukraine
Phone: +38(044)265 9851; fax: +38(044) 265 1589; e-mail: galyna@ukma.kiev.ua
2 P.N. Lebedev Physics Institute, Russian Academy of Sciences, 53 Leninsky prospect, 117924 Moscow, Russia
E-mail: elobr@kapella.gpi.ru
3 National Taras Shevchenko University of Kiev, Department of Radiophysic, 64 Volodymyrska str., 01033 Kyiv, Ukraine
E-mail: slava_ua@mail.univ.kiev.ua

Abstract. Structural characterisation of two different forms of carbon - graphite and single-walled carbon nanotubes (SWCNT) has been done with Raman and FTIR spectroscopy. Interaction of nucleic acids with graphite powder and SWCNT was studied with Surface Enhanced Infrared Absorption (SEIRA) spectroscopy. Analysis of DNA-SWCNT complex vibration modes has shown that the numerous structural changes in DNA have been connected with appearance of new sugar and bases conformations, changes in phosphate vibrations and could be interpreted as A-B conformation transition and stabilisation of structure in some DNA fragments. Only very slight graphite influence on DNA structure have been registered. We have proposed the model of DNA interaction with SWCNT based on wrapping of nucleic acid molecules around carbon nanotubes. The similar situation seems to occur in chromosome during DNA assembling by histones.

Keywords: DNA, Single-Walled Carbon Nanotubes (SWCNT), graphite, Raman, FTIR spectroscopy, Surface Enhanced Infrared Absorption (SEIRA)
Paper received 19.11.02; accepted for publication 18.03.03.

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