Nucleation and growth of microdroplets of ionic liquids deposited by physical vapor method onto different surfaces

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018

Autores

José C. S. Costa (Autor) FEUP; Ana F. S. M. G. Coelho (Autor) Outra; Adélio Mendes (Autor) FEUP; Luís M. N. B. F. Santos (Autor) Outra

Revista

Título: Applied Surface Science

Vol. 428

Páginas: 242-249

ISSN: 0169-4332

Editora: Elsevier

Indexação

ISI Web of Knowledge - 24 Citações

Scopus - 26 Citações

INSPEC

Projetos Associados

LEPABE - Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia

LEPABE-2-ECO-INNOVATION - LEPABE-2-ECO-INNOVATION

Outras Informações

ID Authenticus: P-00N-1MY

DOI: 10.1016/j.apsusc.2017.09.137

Abstract (EN): Nanoscience and technology has generated an important area of research in the field of properties and functionality of ionic liquids (ILs) based materials and their thin films. This work explores the deposition process of ILs droplets as precursors for the fabrication of thin films, by means of physical vapor deposition (PVD). It was found that the deposition (by PVD on glass, indium tin oxide, graphene/nickel and gold-coated quartz crystal surfaces) of imidazolium [C(4)mim][NTf2] and pyrrolidinium [C(4)C(1)Pyrr][NTf2] based ILs generates micro/nanodroplets with a shape, size distribution and surface coverage that could be controlled by the evaporation flow rate and deposition time. No indication of the formation of a wettinglayer prior to the island growth was found. Based on the time-dependent morphological analysis of the micro/nanodroplets, a simple model for the description of the nucleation process and growth of ILs droplets is presented. The proposed model is based on three main steps: minimum free area to promote nucleation; first order coalescence; second order coalescence.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8