Magnetic properties of "doped" DNA
Abstract
A series of double-stranded DNA samples, containing cholesteric liquid crystal droplets, were investigated. Binding of DNA molecules with Gd3+, La3+, Cu2+, ions was carried out. The samples were characterized by X-ray, optical circular dichroism and EPR techniques. Magnetic SQUID magnetometer research showed significant deviations of Gd3+ paramagnetism from the Curie-Weiss law. A possibility of spin-glass-like interactions was analyzed. The dispersion of magnetic parameters was claimed as a main reason of magnetic anomalies observed in the liquid crystal DNA-metal systems. Such systems can be useful in biomedical applications as low-toxic magnetic labels.
- Publication:
-
Journal of Magnetism and Magnetic Materials
- Pub Date:
- August 2018
- DOI:
- 10.1016/j.jmmm.2017.09.008
- Bibcode:
- 2018JMMM..459..340N
- Keywords:
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- Magnetic properties;
- EPR;
- DNA;
- Rare earths;
- Gadolinium;
- Copper;
- Nanoconstructions