| Autor: |
Bunyaev, V. A., Chernysheva, M. G., Badun, G. A. |
| Zdroj: |
Russian Journal of Physical Chemistry; Jul2024, Vol. 98 Issue 7, p1388-1395, 8p |
| Abstrakt: |
Complexes of carbon nanotubes (CNTs) with bovine serum albumin (BSA) and chitosan are synthesized via adsorption from aqueous solutions. Using tritium-labeled compounds, it is shown that the amount of biopolymers bound to CNTs is proportional to their concentration in solution. It is shown that the resulting complexes are stable; they do not degrade after removing the adsorbate solution and washing with water. CNTs with the studied substances are modified sequentially. It is found that the order of sequential modification does not affect the composition of the complex, which can be attributed to the absence of competition for binding sites. It is shown that the synthesized complexes have high stability of sedimentation in aqueous media. The electrokinetic potential of the CNT–chitosan complex reaches a value of +36 mV at a modifying agent concentration of 8 mg/mL. Upon the sequential modification of CNTs with BSA first and then with chitosan, the electrokinetic potential of the complex falls to +20 mV. The electrokinetic potential of the CNT–BSA complex changes from −10 to −18 mV upon raising the concentration of protein in the solution from 0.2 to 5 mg/mL. The sequential modification of CNTs with chitosan first and then with BSA produces complexes with low electrokinetic potentials. Measurements of the angle of contact show that modifying CNTs with chitosan and BSA raises the hydrophilicity of the coatings deposited on glass. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink