The role of surface energy in guanosine nucleotide alignment: An intriguing scenario
| Autor: | Federica Ciuchi, Caterina Maria Tone, Maria Penelope De Santo |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Silver
Sulfates Surface Properties Guanosine Monophosphate Guanosine Ionic bonding Surfaces and Interfaces General Medicine Surface energy Liquid Crystals Ion chemistry.chemical_compound Crystallography Colloid and Surface Chemistry chemistry Liquid crystal Phase (matter) Guanosine monophosphate Chromonic Thermodynamics Microscopy Polarization Physical and Theoretical Chemistry Hydrophobic and Hydrophilic Interactions Biotechnology |
| Zdroj: | Colloids and Surfaces B: Biointerfaces. 119:99-105 |
| ISSN: | 0927-7765 |
| DOI: | 10.1016/j.colsurfb.2014.04.004 |
| Popis: | In this paper we report how the confining surfaces and the ionic effects of different concentration of guanosine solution can be used to vary the alignment of liquid crystal phases of guanosine nucleotides. Liquid crystal phases of guanosine 5′-monophosphate ammonium salt and guanosine 5′-monophosphate free acid in pure water, with and without silver sulphate, were studied by polarized optical microscope. A periodic modulation of the texture was observed. This modulation depends on both on the concentration and on the presence of silver ions in the liquid crystal phase. We demonstrate that, according to the surface energy of the alignment layers, it is possible to homeotropically align the guanosine chromonic phase without applying any external magnetic field. Finally, we report the formation of spherical, vesicle-like guanosine 5′-monophosphate aggregates, when the solution was confined between two hydrophobic surfaces containing exposed Si groups. |
| Databáze: | OpenAIRE |
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