| Autor: |
Komarov, P., Sannikov, I., Khizhnyak, S., Ovchinnikov, M., Pakhomov, P. |
| Zdroj: |
Nanotechnologies in Russia; Dec2008, Vol. 3 Issue 11/12, p716-721, 6p |
| Abstrakt: |
The gelling process in an aqueous solution of cysteine-silver nitrate was studied within the ZINDO/1 quantum chemistry method. As shown previously, silver mercaptide (SM) molecules are formed in the first self-assembly stage in such systems, based on which, supramolecular aggregates (SA) can be formed. The SA stability was studied as a function of the number of SM molecules at their various relative orientations in an aqueous solution. It was found that SM molecules can form linear nanoscale supramolecular oligomers such as [Ag-S-Cys] n with a relatively low interaction energy (∼20 kcal/mol) due to noncovalent bonds. This is one of the answers to the question why thixotropic physical gels can be formed in cysteine-silver nitrate solutions. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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