Understanding the ion-induced elongation of silver nanoparticles embedded in silica
Por:
Pena-Rodriguez, Ovidio, Prada, Alejandro, Olivares, Jose, Oliver, Alicia, Rodriguez-Fernandez, Luis, Silva-Pereyra, Hector G., Bringa, Eduardo, Manuel Perlado, Jose, Rivera, Antonio
Publicada:
19 abr 2017
Categoría:
Multidisciplinary
Resumen:
In this work we have studied the elongation of silver nanoparticles irradiated with 40 MeV Bromine ions by means of in situ optical measurements, transmission electron microscopy and molecular dynamics simulations. The localized surface plasmon resonance of silver nanoparticles has a strong dependence on the particle shape and size, which allowed us to obtain the geometrical parameters with remarkable accuracy by means of a fit of the optical spectra. Optical results have been compared with transmission electron microscopy images and molecular dynamics simulations and the agreement is excellent in both cases. An important advantage of in situ measurements is that they yield an extremely detailed information of the full elongation kinetics. Final nanoparticle elongation depends on a complex competition between single-ion deformation, Ostwald ripening and dissolution. Building and validating theoretical models with the data reported in this work should be easier than with the information previously available, due to the unprecedented level of kinetic details obtained from the in situ measurements.
Filiaciones:
Pena-Rodriguez, Ovidio:
Univ Politecn Madrid, Inst Fus Nucl, Jose Gutierrez Abascal 2, E-28006 Madrid, Spain
Prada, Alejandro:
Univ Politecn Madrid, Inst Fus Nucl, Jose Gutierrez Abascal 2, E-28006 Madrid, Spain
Olivares, Jose:
CSIC, IO, C Serrano 121, E-28006 Madrid CSIC), Spain
Univ Autonoma Madrid, Ctr Microanal Mat, Madrid, Spain
CSIC, IO, C Serrano 121, E-28006 Madrid, Spain
Oliver, Alicia:
Univ Nacl Autonoma Mexico, Inst Fis, AP 20-364, Mexico City 01000, DF, Mexico
Rodriguez-Fernandez, Luis:
Univ Nacl Autonoma Mexico, Inst Fis, AP 20-364, Mexico City 01000, DF, Mexico
Silva-Pereyra, Hector G.:
IPICyT, Div Mat Avanzados, Camino Presa San Jose 2055, San Luis Potosi 78216, SLP, Mexico
Bringa, Eduardo:
Univ Nacl Cuyo, CONICET, RA-5500 Mendoza, Argentina
Univ Nacl Cuyo, Fac Ciencias Exactas & Nat, RA-5500 Mendoza, Argentina
Manuel Perlado, Jose:
Univ Politecn Madrid, Inst Fus Nucl, Jose Gutierrez Abascal 2, E-28006 Madrid, Spain
Rivera, Antonio:
Univ Politecn Madrid, Inst Fus Nucl, Jose Gutierrez Abascal 2, E-28006 Madrid, Spain
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