Evaporation of Nanosuspensions on Substrates with Different Hydrophobicity.

Citation:

Perrin L, Pajor-Swierzy A, Magdassi S, Kamyshny A, Ortega F, Rubio RG. Evaporation of Nanosuspensions on Substrates with Different Hydrophobicity. ACS Appl. Mater. InterfacesACS Applied Materials & Interfaces. 2018;10 (3) :3082 - 3093.

Date Published:

2018///

Abstract:

Liq. drop evapn. on surfaces is present in many industrial and medical applications, e.g., printed electronics, spraying of pesticides, DNA mapping, etc. Despite this strong interest, a theor. description of the dynamic of the evapn. of complex liq. mixts. and nanosuspensions is still lacking. Indeed, one of the aspects that have not been included in the current theor. descriptions is the competition between the kinetics of evapn. and the adsorption of surfactants and/or particles at the liq./vapor and liq./solid interfaces. Materials formed by an elec. isolating solid on which a patterned conducting layer was formed by the deposits left after drop evapn. have been considered as very promising for building elec. circuits on flexible plastic substrates. In this work, we have done an exhaustive study of the evapn. of nanosuspensions of latex and hydrophobized silver nanoparticles on four substrates of different hydrophobicity. The advancing and receding contact angles as well as the time dependence of the vol. of the droplets have been measured over a broad range of particle concns. Also, mixts. of silver particles and a surfactant, commonly used in industrial printing, have been examd. Furthermore, the adsorption kinetics at both the air/liq. and solid/liq. interfaces have been measured. Whereas the latex particles do not adsorb at the solid/liq. and only slightly reduce the surface tension, the silver particles strongly adsorb at both interfaces. The exptl. results of the evapn. process were compared with the predictions of the theory of Semenov et al. (Evapn. of Sessile Water Droplets: Universal Behavior in the Presence of Contact Angle Hysteresis. Colloids Surf. Physicochem. Eng. Asp. 2011, 391 (1-3), 135-144) and showed surprisingly good agreement despite that the theory was developed for pure liqs. The morphol. of the deposits left by the droplets after total evapn. was studied by scanning electronic microscopy, and the effects of the substrate, the particle nature, and their concns. on these patterns are discussed. [on SciFinder(R)]

Notes:

CAPLUS AN 2017:2027250(Journal; Online Computer File)