Size and shape control in the overgrowth of gold nanorods (Articolo in rivista)

Type
Label
  • Size and shape control in the overgrowth of gold nanorods (Articolo in rivista) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1007/s11051-009-9712-0 (literal)
Alternative label
  • Fulvio Ratto; Paolo Matteini; Francesca Rossi; Roberto Pini (2010)
    Size and shape control in the overgrowth of gold nanorods
    in Journal of nanoparticle research
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Fulvio Ratto; Paolo Matteini; Francesca Rossi; Roberto Pini (literal)
Pagina inizio
  • 2029 (literal)
Pagina fine
  • 2036 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 12 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 8 (literal)
Note
  • Google Scholar (literal)
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto di Fisica Applicata ''Nello Carrara'', Consiglio Nazionale delle Ricerche, Via Madonna del Piano, 10, 50019 Sesto Fiorentino (FI), Italy (literal)
Titolo
  • Size and shape control in the overgrowth of gold nanorods (literal)
Abstract
  • We report on a new sustainable approach to manipulate the optical behaviour and geometrical properties of gold nanorods in aqueous solutions by fine control of their overgrowth. In our approach, the overgrowth is realized by modulation of the reduction of the gold ions which are left as Au(1+) after the primary step of the synthesis (typically as much as similar to 80% of the gold ions available in the growth solution). The progress of the reduction requires the gradual addition of ascorbic acid, which transforms the Au(1+) into Au(0) and may be performed in the original growth solution with no need for any further manipulation. By control of the total amount and rate of administration of the ascorbic acid, we prove the possibility to realize a systematic modulation of the average lengths, diameters, shapes (rod or dog-bone like), and light extinction of the nanoparticles. A slow overgrowth leads to a gradual enlargement of the lengths and diameters at almost constant shape. In contrast, a faster overgrowth results into a more complex modification of the overall shape of the gold nanorods. (literal)
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