Brunner, Eike and Lutz, Katharina and Sumper, Manfred (2004) Biomimetic synthesis of silica nanospheres depends on the aggregation and phase separation of polyamines in aqueous solution. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 6 (4). pp. 854-857. ISSN 1463-9076, 1463-9084
Full text not available from this repository. (Request a copy)Abstract
Long-chain polyamines extracted from the highly siliceous cell walls of diatoms are known to precipitate silica nanospheres from aqueous, silicic-acid containing solutions at near-neutral pH in vitro. The same is true for synthetic polyamines such as polyallylamine. In the present contribution we show that the microscopic phase separation of polyallylamine in aqueous solution is strictly correlated with the silica precipitation activity of polyallylamine/silicic acid solutions. Multivalent anions such as phosphate or sulfate efficiently induce this microscopic phase separation. At higher anion concentrations, macroscopic phase separation occurs. In contrast to the multivalent phosphate and sulfate ions, the monovalent chloride ions are much less efficient in polyallylamine aggregate formation.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ACID POLYMERIZATION; DIATOM BIOSILICA; PEPTIDES; |
| Subjects: | 500 Science > 530 Physics 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Biophysik und physikalische Biochemie > Alumni or Retired > Prof. Dr. Eike Brunner Biology, Preclinical Medicine > Institut für Biochemie, Genetik und Mikrobiologie > Lehrstuhl für Biochemie I |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 Jul 2021 08:18 |
| Last Modified: | 27 Jul 2021 08:18 |
| URI: | https://pred.uni-regensburg.de/id/eprint/38246 |
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