Chirality transfer from organic ligands to silver nanostructures via chiral polarisation of the electric field
| Autor: | Aras Kartouzian, Ulrich Heiz, Alexander von Weber, Matthias Jakob |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Circular dichroism
Silver Nanostructure Materials science Metal Nanoparticles General Physics and Astronomy 02 engineering and technology Ligands 010402 general chemistry Photochemistry 01 natural sciences Electricity Microscopy Electron Transmission X-ray photoelectron spectroscopy Electric field Cysteine Physical and Theoretical Chemistry Ligand Circular Dichroism Photoelectron Spectroscopy Spectrometry X-Ray Emission Water Stereoisomerism 021001 nanoscience & nanotechnology Glutathione 0104 chemical sciences Transmission electron microscopy 0210 nano-technology Chirality (chemistry) Visible spectrum |
| Zdroj: | Physical Chemistry Chemical Physics. 20:20347-20351 |
| ISSN: | 1463-9084 1463-9076 |
| Popis: | Water-soluble ligand protected optically active silver nanostructures were synthesised in a one-step reduction and capping process mediated by thiol-containing biomolecules. The synthesis was performed successfully with d- and l-cysteine and l-glutathione. The chiroptical properties of the obtained nanostructures were investigated by circular dichroism spectroscopy in the ultraviolet and visible wavelength range. They exhibit a g-value of up to 0.7%, which is about one order of magnitude larger compared to particles prepared by citrate reduction followed by a ligand exchange reaction. The structure and composition of the prepared materials were characterised by transmission electron microscopy, energy-dispersive X-ray and X-ray photoelectron spectroscopy. Although these structures do not have a chiral geometry, they show mirror image g-values when capped with d- and l-cysteine. This indicates that the underlying chirality transfer mechanism is based on an electric field polarisation process. |
| Databáze: | OpenAIRE |
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