http://www.cnr.it/ontology/cnr/individuo/prodotto/ID40066
Optical trapping calculations for metal nanoparticles. Comparison with experimental data for Au and Ag spheres. (Articolo in rivista)
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- Label
- Optical trapping calculations for metal nanoparticles. Comparison with experimental data for Au and Ag spheres. (Articolo in rivista) (literal)
- Anno
- 2009-01-01T00:00:00+01:00 (literal)
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- Saija R.; Denti P.; Borghese F.; Maragò O.M.; and Iatì M.A. (literal)
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- Rivista
- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- 1) Dipartimento di Fisica della Materia e Ingegneria Elettronica, Università di Messina, Salita Sperone 31, 98166 Messina, Italy
2) Istituto per i Processi Chimico-Fisici (Messina), Consiglio Nazionale delle Ricerche,Salita Sperone, 98158 Faro Superiore, Messina, Italy (literal)
- Titolo
- Optical trapping calculations for metal nanoparticles. Comparison with experimental data for Au and Ag spheres. (literal)
- Abstract
- We calculate the optical forces on Au and Ag nanospheres
through a procedure based on the Maxwell stress tensor. We compare the
theoretical and experimental force constants obtained for gold and silver
nanospheres finding good agreement for all particles with r < 80nm. The
trapping of the larger particles recently demonstrated in experiments is not foreseen by our purely electromagnetic theory based on fixed dielectric
properties. Since the laser power produces a heating that may be large for
the largest spheres, we propose a model in which the latter particles are
surrounded by a steam bubble. This model foresees the trapping of these
particles and the results turn out to be in reasonable agreement with the
experimental data. (literal)
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