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dc.contributor.authorSelenska-Pobell, Sonja
dc.contributor.authorReitz, Thomas
dc.contributor.authorSchönemann, Rico
dc.contributor.authorHerrmansdörder, Thomas
dc.contributor.authorMerroun, Mohamed Larbi 
dc.contributor.authorGeißler, Andrea
dc.contributor.authorBartolomé, Juan
dc.contributor.authorBartolomé, Fernando
dc.contributor.authorGarcía, Luis Miguel
dc.contributor.authorWilhelm, Fabrice
dc.contributor.authorRogalev, Andrei
dc.date.accessioned2014-06-18T08:08:36Z
dc.date.available2014-06-18T08:08:36Z
dc.date.issued2011
dc.identifier.citationSelenska-Pobell, S.; et al. Magnetic Au Nanoparticles on Archaeal S-Layer Ghosts as Templates. Nanomaterials and Nanotechnology, 1(2): 8-16 (2011). [http://hdl.handle.net/10481/32289]es_ES
dc.identifier.issn1847-9804
dc.identifier.urihttp://hdl.handle.net/10481/32289
dc.description.abstractCell‐ghosts representing empty cells of the archaeon Sulfolobus acidocaldarius, consisting only of their highly ordered and unusually stable outermost proteinaceous surface layer (S‐layer), were used as templates for Au nanoparticles fabrication. The properties of these archaeal Au nanoparticles differ significantly from those produced earlier by us onto bacterial S‐layer sheets. The archaeal Au nanoparticles, with a size of about 2.5 nm, consist exclusively of metallic Au(0), while those produced on the bacterial S‐layer had a size of about 4 nm and represented a mixture of Au(0) and Au(III) in the ratio of 40 to 60 %. The most impressive feature of the archaeal Au nanoparticles is that they are strongly paramagnetic, in contrast to the bacterial ones and also to bulk gold. SQUID magnetometry and XMCD measurements demonstrated that the archaeal Au nanoparticles possess a rather large magnetic moment of about 0.1μB/atom. HR‐ TEM‐EDX analysis revealed that the archaeal Au nanoparticles are linked to the sulfur atoms of the thiol groups of the amino acid cysteine, characteristic only for archaeal S‐layers. This is the first study demonstrating the formation of such unusually strong magnetic Au nanoparticles on a non‐modified archaeal S‐layer.es_ES
dc.description.sponsorshipPart of this work was supported by the EU in EuroMagNet II (Grant No. 228043) and Magister (Grant No. NMP3‐LA‐2008‐214685). Merroun, M.L. is a “Ramón y Cajal Fellow” of the University of Granada. His contribution was supported by grant No. CGL2009‐09760, and those of the Zaragoza group by project MAT08/1077 of the “Ministerio de Ciencia e Innovación”, Spain. This work corresponds to experiment HE3427 of the ESRF.es_ES
dc.language.isoenges_ES
dc.publisherInTech Open Access Publisheres_ES
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivs 3.0 License
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/
dc.subjectMagnetic Au nanoparticleses_ES
dc.subjectArchaeal S-layeres_ES
dc.subjectHigh Resolution Transmission Electron Microscopy (HR-TEM)es_ES
dc.subjectX-ray Magnetic Circular Dichroism (XMCD)es_ES
dc.titleMagnetic Au Nanoparticles on Archaeal S-Layer Ghosts as Templateses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES
dc.identifier.doi10.5772/50955


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