The effect of ionic liquids on the nucleation and growth of perylene films obtained by vapor deposition

• Tipo: Artigo em Revista Científica Internacional
• Data: 2023

Autores

Costa, JCS (Autor) FCUP; Campos, RM (Autor) Outra; Castro, ACM (Autor) Outra; Farinha, AFM (Autor) Outra; Oliveira, GNP (Autor) FCUP; araujo, j. p. (Autor) FCUP; Luis M N B F Santos (Autor) FCUP

Revista

Título: CrystEngComm

Vol. 25

Páginas: 913-924

ISSN: 1466-8033

Editora: Royal Society of Chemistry

Indexação

ISI Web of Knowledge - 4 Citações

Scopus - 5 Citações

Outras Informações

ID Authenticus: P-00X-REB

DOI: 10.1039/d2ce01495e

Abstract (EN): Microdroplets and thin films of imidazolium-based ionic liquids (ILs) of different sizes and shapes were used as confining agents for the formation of high-quality perylene crystals by vapor deposition. The role of ILs to control the nucleation and subsequent crystal growth of perylene was investigated by sequential and simultaneous depositions of both materials using indium tin oxide (ITO) as the underlying substrate. The deposition of ILs onto the perylene film surface led to the formation of a complete 2D wetting layer, followed by island growth. Higher adhesion and affinity were found for longer-chain ILs. Inverting the deposition order, the perylene microcrystals were found to grow via the ILs droplets. Additionally, the nucleation and growth of perylene monocrystals enhanced the coalescence mechanisms of the ILs droplets. This wetting process was especially evident for longer-chain ILs. The deposition of perylene onto ITO surfaces fully covered with coalesced ionic liquid films led to the formation of a perylene film with the highest homogeneity as the result of a decrease in surface mobility. The co-deposition of perylene and ILs emphasized the potential application of ILs as crystallization solvents for the formation of thin organic films with improved crystalline quality without compromising the optoelectronic properties.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 14