Monitoring early stages of silver particle formation in a polymer solution by in situ and time resolved small angle X-ray scattering (Articolo in rivista)

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  • Monitoring early stages of silver particle formation in a polymer solution by in situ and time resolved small angle X-ray scattering (Articolo in rivista) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1039/c0nr00390e (literal)
Alternative label
  • Campi G. (a), Mari A. (b), Amenitsch H. (c), Pifferi A. (a), Cannas C. (d), Suber L. (b) (2010)
    Monitoring early stages of silver particle formation in a polymer solution by in situ and time resolved small angle X-ray scattering
    in Nanoscale (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Campi G. (a), Mari A. (b), Amenitsch H. (c), Pifferi A. (a), Cannas C. (d), Suber L. (b) (literal)
Pagina inizio
  • 2447 (literal)
Pagina fine
  • 2455 (literal)
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  • Electronic supplementary information (ESI) available: Log-Log plot of integrated intensity vs. time (Fig. 1) and further details about the fitting model and procedure (Fig. 2, Fig. 3, Fig. 4). (literal)
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  • 2 (literal)
Rivista
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  • http://dx.doi.org/10.1039/c0nr00390e (literal)
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  • 9 (literal)
Note
  • ISI Web of Science (WOS) (literal)
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  • a) CNR-Istituto di Cristallografia, Via Salaria, Km 29.300, Monterotondo Stazione, RM, I-00015, Italy; b) CNR- Istituto di Struttura della Materia, Via Salaria, Km 29.300, Monterotondo Stazione, RM, I-00015, Italy; c) Institut of Biophysics and Nanosystems Research, Austrian Academy of Sciences, Schmiedlstrasse 6, 8042 Graz, Austria; d) Chemistry Department, University of Cagliari, SS 554 Bivio per Sestu, Monserrato, CA, I-O9042, Italy; (literal)
Titolo
  • Monitoring early stages of silver particle formation in a polymer solution by in situ and time resolved small angle X-ray scattering (literal)
Abstract
  • Silver particles have been prepared by reduction of silver nitrate with ascorbic acid in acidic aqueous solution containing a low concentration of a commercial polynaphthalene sulfonate polymer (Daxad 19) as dispersant agent. The reduction has been induced and controlled by the slow addition of ascorbic acid at a fixed rate; in this way, we were able to monitor the formation of a silver crystalline colloidal dispersion by in situ and time resolved Small Angle X-ray Scattering measurements. Modeling the scattering intensity with interacting spherical particles in a polymer–Ag like-fractal template allowed us to distinguish different stages involving liquid-like ordered cluster nucleation, cluster growth up to primary particle formation and particle coalescence. Between primary particle formation and particle coalescence, we observed the occurrence of a transient phase of core–shell type structures having primary particles as stable cores in expanding shells built by the organic polymer. We discuss these results in a twofold perspective pertaining both to technology, relative to controlled fabrication of metal nanoparticles and to basic chemical physics, dealing with non standard stepwise crystallization from solutions. (literal)
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