An academic research institution from Bulgaria with strong background in polymer and materials science and interdisciplinary research has developed innovative laboratory scale method for synthesis of hybrid silver nanoparticles dispersion, surface stabilized by water-soluble derivatives of calixarenes.
The method avoids the use of the traditionally used silver nitrate salt precursor, thus avoiding residual traces of the unreduced ion precursor and significantly simplifying the isolation and purification of the resulting colloidal dispersion. High concentrations (up to 400 ppm) of colloidal dispersion of AgNPs is achieved, which are stable over time and easily re-dispersed after drying, including in physiological aqueous saline solutions, which extends storage and possible biomedical (both human and veterinary) applications of the preparations. The biological tests of the synthesized preparations showed strongly pronounced antibacterial activity against strains of Gram-positive and Gram-negative bacteria, as well as pronounced in vitro selective cytotoxicity against tumor cell lines (bladder cancer and leukemia) at low blood plasma levels of elemental silver.
The team is looking for international partners to conclude the following types of agreements in order to disseminate and/or improve the developed technology:
- commercial agreements with technical assistance are sought under which acquisition (transfer) of the method for synthesis of hybrid silver nanoparticles dispersion is envisaged, supported by technical consultancy by the research team for its efficient use;
- in the case of licensing implementation of the supplement in the industry is expected against payment of license fee or royalties;
- under technical cooperation a further scale-up the method of production to be realized is envisaged;
- it is also possible to conclude other types of contracts depending on the wish of the potential partner and the negotiations, research cooperation agreement for further deep R&D of the obtained dispersion, including pre-clinical / clinical testing.