Hardness Maps Analysis of the Layered Nanocomposites for Tissue Repair of the Cardiovascular System

摘要

The hardness characteristic of layered nanocomposites based on single-walled carbon nanotubes in the biological matrices of albumin, collagen proteins and also the amino sugar of chitosa are investigated. Nanocomposites are formed by layer-by-layer near IR pulsed laser evaporation of aquatic biological matrices with nanotubes. Maps of the distribution of hardness of nanocomposites at depths 200-1000 nm were constructed using the scanning indentation method. Analysis of the maps made possible to demonstrate the structural characteristics of nanocomposites - the distribution of carbon nanotube bundles over the volume of nanocomposites. The hardness of nanocomposites ranged from 50 to 600 MPa. The results indicate the possibility of using nanocomposites based on single-walled carbon nanotubes with a diameter of 1.5-1.6 nm and a length of 7-8 μm in tissue engineering of the cardiovascular system.