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- Title
Quantum Confinement Features in EPR and UV-vis Spectra of Al/Au Nanosystems.
- Authors
Kislyuk, V. V.; Melnyk, A. K.; Buryak, N. I.; Trachevskij, V. V.
- Abstract
The composite Al/Au nanosystems synthesized by co-reduction from solution (with tannin and sodium citrate as reducing agent) are studied by electron paramagnetic resonance (EPR) and UV-vis electron absorption spectroscopies. A fine structure revealed in line with g = 2.062 (associated with particles whose paramagnetism originates from odd number of gold atoms) is attributed to the discrete electronic states of an unpaired electron in a joint electron structure of a polyatomic nanoparticle. This fine structure manifests itself as a sequence of the resonance signals with close values of their g-factors. The UV-vis absorption spectra of the Al/Au nanocomposite solution contain equidistant absorption bands with 0.73-0.7 eV energy differences between the adjacent peaks. These features are attributed to the quantum confinement effects in the Al/Au nanocomposite system. The estimates made on the basis of the experimental data outline the size of the gold containing nanoclusters which in their paramagnetic form are of several nm in diameter.
- Subjects
ELECTRON paramagnetic resonance; QUANTUM confinement effects; ODD numbers; ELECTRON spectroscopy; GOLD; ABSORPTION spectra; FINE structure (Physics)
- Publication
Journal of Nano- & Electronic Physics, 2019, Vol 11, Issue 4, p1
- ISSN
2077-6772
- Publication type
Article
- DOI
10.21272/jnep.11(4).04036