Nanoparticle Size and Concentration Dependence of the Electroactive Phase Content and Electrical and Optical Properties of Ag/Poly(vinylidene fluoride) Composites

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

A.C. Lopes (Autor) Outra; Sónia Carabineiro (Autor) FEUP; Manuel Fernando R Pereira (Autor) FEUP; G. Botelho (Autor) Outra; S. Lanceros-Mendez (Autor) Outra

Revista

Título: ChemPhysChem

Vol. 14

Páginas: 1926-1933

ISSN: 1439-4235

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 38 Citações

ISI Web of Science

Scopus - 46 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias

Outras Informações

ID Authenticus: P-006-A0E

DOI: 10.1002/cphc.201300174

Abstract (EN): This paper describes the processing of silver-nanoparticle-doped poly(vinylidene fluoride). The effects of the concentration and size of the filler on the electroactive phase of the polymer and the optical and electrical properties are discussed. Spherical silver nanoparticles incorporated into the poly(vinylidene fluoride) polymeric matrix induce nucleation of the electroactive phase. The electroactive phase content strongly depends on the content and size of the nanoparticles. In particular, there is a critical nanoparticle size, below which the filler losses its nucleation efficiency due to its small size relative to that of the polymer macromolecules. Furthermore, the presence of surface plasmon resonance absorption in the composites is observed, which once again shows a strong dependence on the concentration and size of the particles. The absorption is larger for higher concentrations, and for a given concentration increases with particle size. This behavior is correlated to the electrical response and is related to the extra bands and electrons provided by the nanoparticles in the large energy band gap of the polymer.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8