ROACH, Lucien; GONZALEZ-RODRIGUEZ, David; GAO, Jie; LAURICHESSE, Eric; CASTRO GRIJALBA, Alexander; ODA, Reiko; SCHMITT, Veronique; POUGET, Emilie; TREGUER-DELAPIERRE, Mona; DRISKO, Glenna

doi:10.1021/acs.langmuir.2c02890

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ROACH, Lucien

Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

GONZALEZ-RODRIGUEZ, David

GAO, Jie
Chimie et Biologie des Membranes et des Nanoobjets [CBMN]

Langue

Article de revue

Ce document a été publié dans

Langmuir. 2023, vol. 39, n° 12, p. 4216–4223

Résumé en anglais

The process of convectively self-assembling particles in films suffers from low reproducibility due to its high dependency on particle concentration, as well as a variety of interactions and physical parameters. Inhomogeneities in flow rates and instabilities at the air–liquid interface are mostly responsible for reproducibility issues. These problems are aggravated by adding multiple components to the dispersion, such as binary solvent mixtures or surfactant/polymer additives, both common approaches to control stick-slip behavior. When an additive is used, not only does it change the surface tension, but also the viscosity and the evaporation rate. Worse yet, gradients in these three properties can form, which then lead to Marangoni currents. Here, we use a series of alcohols to study the role of viscosity independently of other solvent properties, to show its impact on stick-slip behavior and interband distances. We show that mixtures of glycerol and alcohol or poly(acrylic acid) and alcohol lead to more complex patterning. Marangoni currents are not always observed in co-solvent systems, being dependent on the rate of solvent evaporation. To produce homogeneous particle assemblies and control stick-slip behavior, gradients must be avoided, and the surface tension and viscosity need both be carefully controlled.< Réduire

Mots clés en anglais

Convective flux

Landau‑Levich flow

stick‑slip

viscosity

evaporative rate

URI

https://oskar-bordeaux.fr/handle/20.500.12278/199562

DOI

http://dx.doi.org/10.1021/acs.langmuir.2c02890

Projet Européen

Bottom-up fabrication of nanostructured silicon-based materials with unprecedented optical properties

Project ANR

Initiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003

Unités de recherche

CBMN : Chimie & de Biologie des Membranes & des Nano-objets - UMR 5248