Moser, D. Garnier, Michael G. Karvonen, L. Shkabko, A. Aebi, Philipp Weidenkaff, A. 2012-09-26 Misfit-layered Ca₃Co₄O₉ crystals were grown and characterized via XRD, SEM, and photo-emission spectroscopy (PES). The evolution of the intensity at the Fermi level (<em>E</em> _F) with varying oxygen content was studied by PES. Oxygen species were successfully introduced and removed through O⁺ and H⁺ microwave-plasma (2.45 GHz, 2–5 mbar) treatments, respectively. A 5 min O⁺ plasma exposure was observed to result into a drastic enhancement in the <em>E</em> _F intensity, demonstrating the influence of oxygen content to the charge carrier population in layered cobalt-oxide materials. application/pdf https://folia.unifr.ch/global/documents/302629 https://folia.unifr.ch/documents/302629/files/aeb_rce.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1007/s10853-012-6880-6 info:eu-repo/semantics/openAccess License undefined Journal of Materials Science. - 2013, vol. 48, no. 7, p. 2823-2828 info:eu-repo/classification/udc/53 Reversible control of the electronic density of states at the Fermi level of Ca₃Co₄O_9+δ misfit-layered oxide single crystals through O⁺/H⁺ plasma exposure http://purl.org/coar/resource_type/c_6501