Magnetism of Dendrimer-Coated Gold Nanoparticles: A Size and Functionalization Study

Ulloa, J.A. ; Lorusso, G. ; Evangelisti, M. ; Camon, A. ; Barbera, J. (Universidad de Zaragoza) ; Serrano, J.L. (Universidad de Zaragoza)

Resumen: Highly sensitive magnetometry reveals paramagnetism in dendrimer-coated gold nanoparticles. Different types of such nanoparticles, as a result of (i) functionalizing with two distinct Percec-type dendrons, linked to gold via dodecanethiol groups, and (ii) postsynthesis annealing in a solvent-free environment that further promotes their growth have been prepared. Ultimately, for each of the two functionalization configurations, we obtain highly monodisperse and stable nanoparticles of two different sizes, with spherical shape. These characteristics allow singling out the source of the measured paramagnetic signals as exclusively arising from the undercoordinated gold atoms on the surfaces of the nanoparticles. Bulk gold and the functional groups of the ligands contribute only diamagnetically.

Idioma: Inglés

DOI: 10.1021/acs.jpcc.1c04213

Año: 2021

Publicado en: Journal of physical chemistry. C. 125, 37 (2021), 20482-20487
ISSN: 1932-7447

Factor impacto JCR: 4.177 (2021)

Categ. JCR: CHEMISTRY, PHYSICAL rank: 78 / 165 = 0.473 (2021) - Q2 - T2
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 143 / 344 = 0.416 (2021) - Q2 - T2
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 62 / 108 = 0.574 (2021) - Q3 - T2

Factor impacto CITESCORE: 7.0 - Energy (Q1) - Materials Science (Q1)

Factor impacto SCIMAGO: 1.103 - Electronic, Optical and Magnetic Materials (Q1) - Surfaces, Coatings and Films (Q1) - Physical and Theoretical Chemistry (Q1) - Energy (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA-FSE/E47-17R
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/PGC2018-097583-B-I00
Financiación: info:eu-repo/grantAgreement/ES/MINECO/RTI2018-094909-J-I00

Tipo y forma: Article (Published version)

Área (Departamento): Área Química Orgánica (Dpto. Química Orgánica)