Sharp cubic and octahedral morphologies of poly(vinylpyrrolidone)-stabilised platinum nanoparticles by polyol method in ethylene glycol

Their nucleation, growth and formation mechanisms

Nguyen Viet Long, Nguyen Duc Chien, Tomokatsu Hayakawa, Takashi Matsubara, Michitaka Ohtaki, Masayuki Nogami

    Research output: Contribution to journalArticle

    10 Citations (Scopus)

    Abstract

    Pt nanoparticles (NPs) were synthesised by a modified polyol method with the addition of silver nitrate. The results showed that the specific shapes of Pt NPs were influenced by the relevant factors, which are the contents of silver nitrate, synthetic time and temperature. A small content of silver nitrate has played an important role in determining their final shapes of platinum NPs. We observed that Pt NPs in the forms of very sharp shapes such as Pt cubes, octahedrons, cuboctahedrons and tetrahedrons have been obtained. In addition, the shape growth mechanisms and formation of Pt NPs have been studied. They exist in both cubic and octahedral shapes. Importantly, Pt nanocrystals can grow into main cubic and octahedral shapes for a short time less than 15 min. Moreover, Pt nanocrystals can also grow into different shapes from cubic and octahedral into spherical ones for several hours. Especially, they exhibited interesting shapes of multiple-branched Pt nanostructures because of their overgrowth and aggregations. Clearly, large cubic and octahedral Pt NPs of 160 nm diameter were observed. The growth and formation of large cubic and octahedral Pt NPs were due to the aggregation of Pt clusters or initial Pt seeds, even small Pt nanocrystals.

    Original languageEnglish
    Pages (from-to)133-149
    Number of pages17
    JournalJournal of Experimental Nanoscience
    Volume7
    Issue number2
    DOIs
    Publication statusPublished - Mar 1 2012

    Fingerprint

    Ethylene Glycol
    Polyols
    Ethylene glycol
    Platinum
    Nucleation
    Nanoparticles
    Silver Nitrate
    Nanocrystals
    Nitrates
    Silver
    Agglomeration
    polyol
    Seed
    Nanostructures

    All Science Journal Classification (ASJC) codes

    • Bioengineering
    • Biomedical Engineering
    • Materials Science(all)

    Cite this

    Sharp cubic and octahedral morphologies of poly(vinylpyrrolidone)-stabilised platinum nanoparticles by polyol method in ethylene glycol : Their nucleation, growth and formation mechanisms. / Long, Nguyen Viet; Chien, Nguyen Duc; Hayakawa, Tomokatsu; Matsubara, Takashi; Ohtaki, Michitaka; Nogami, Masayuki.

    In: Journal of Experimental Nanoscience, Vol. 7, No. 2, 01.03.2012, p. 133-149.

    Research output: Contribution to journalArticle

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