On the electrohydrodynamic jet printing of two-dimensional material-based inks for printed electronics

• Tipo: Artigo em Revista Científica Internacional
• Data: 2024

Autores

Rijo, PC (Autor) Outra; Vega, EJ (Autor) Outra; Galindo Rosales, FJ (Autor) FEUP; Montanero, JM (Autor) Outra

Revista

Título: Physics of Fluids

Vol. 36

ISSN: 1070-6631

Editora: American Institute of Physics

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 0 Citações

Outras Informações

ID Authenticus: P-017-DY8

DOI: 10.1063/5.0234191

Abstract (EN): Electrohydrodynamic (EHD) jet printing is a well-known advanced manufacturing technique that uses electric fields to generate and control fine jets of fluid for high-precision deposition of materials. This method enables the printing of extremely fine features, making it ideal for applications such as printed electronics. However, little is known about the optimal conditions for achieving consistent jet stability and droplet formation, especially when dealing with complex and volatile fluids laden with two-dimensional (2D) nanoparticles. In this work, we study the electrohydrodynamic printing process of 2D material-based inks using toluene as the main carrier fluid. Adding ethyl cellulose to toluene allows us to increase the stability of the suspensions and establish the steady cone-jet mode of electrospray. A small amount of ethanol increases the fluid conductivity, stabilizing the steady cone-jet mode and reducing the jet diameter. The inks behave as leaky-dielectric, weakly viscoelastic liquids. For this reason, the jet diameter and minimum flow rate obey the scaling laws for electrospray of Newtonian liquids. We determine the optimal parameter conditions for the EHD printing of our inks directly onto a non-conductive substrate. The influence of the substrate's velocity on the width of the printed lines is analyzed. These findings enlarge the knowledge about how to increase the throughput in the EHD jet printing process while controlling the resolution of the printed lines when using volatile solvents, 2D nanomaterials, and non-conductive substrates.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11