ИСТИНА

Unique properties of carbon nanomaterials (such as fullerenes and nanodiamonds) find various applications in several branches of science and technology. They are used in the creation of composites and catalysts. Especially important are biological and medical applications. These substances can be used as contrast agents, antibiotics, biolables; they are promising against cancer, in cellular surgery, as antioxidants, enterosorbents [1, 2]. Water solutions of nanocarbons are the most suitable for medicine. Both nanodiamonds and fullerenes formed colloidal solutions. It is strongly necessary for biomedical purposes to know concentration of nanodiamonds and fullerenes in solutions and colloidal particle sizes. The methods used for the last aim, dynamic light scattering and low-angle neutron scattering, have some significant drawbacks like very complicated data-handling routines and the problem of scattering on large particles and don’t give satisfactory results in all cases. We used novel methods of absorption spectroscopy as methods for estimating size and concentrational dependences in dispersions exemplified by nanodiamonds and fullerenes. Recently, the progress in laser technologies has provided a sound basis for compact optical schemes and commercial applications of photoacoustic (PAS) and photothermal (PTS) spectroscopies in analytical and physical chemistry. In this study, we used PAS/PTS measurements for fullerenes and nanodiamonds suspensions at high and trace level of constituents in various media (aqueous solutions and organic solvents). These disperse media were characterized by a multitude of conversion mechanisms, with the main feature of their simultaneous and competing character. Moreover, the existing of particles with constantly changing configuration provides a random constituent of the signal. These features were observed as functions of dynamic (response profile) and statistic (amplitude fluctuation) parameters of PAS/PTS signals and disperse-phase parameters. Also we studied high-energy laser radiation influence on nanodiamonds and fullerenes dispersed systems. Specific results will be presented at the Conference.