Affiliation:
1. PASTEUR, Department of Chemistry École Normale Supérieure PSL University Sorbonne Université CNRS Paris 75005 France
2. Department of Chemistry and CSGI University of Florence via della Lastruccia 3, Sesto Fiorentino Firenze I‐50019 Italy
Abstract
AbstractExisting strategies designed to produce ordered arrangements of colloidal particles on solid supports are of great interest for their wide range of applications, from colloidal lithography, plasmonic and biomimetic surfaces to tags for anti‐counterfeiting, but they all share various degrees of complexity hampering their facile implementation. Here, a drastically simplified methodology is presented to achieve ordered particle deposition, consisting in adding micromolar amounts of cationic surfactant to a colloidal suspension drop and let it evaporate in an upside‐down configuration. Confinement at the air/water interface enables particle assembly into monolayers, which are then transferred on the substrate producing highly ordered structures displaying vivid, orientation‐dependent structural colors. The method is compatible with many particle types and substrates, while controlling system parameters allows tuning the deposit size and morphology, from monocrystals to polycrystalline disks and “irises”, from single‐component to crystal alloys with Moiré patterns, demonstrating its practicality for a variety of processes.
Funder
European Research Council
Agence Nationale de la Recherche
Institut Universitaire de France
FP7 Ideas: European Research Council
Subject
General Physics and Astronomy,General Engineering,Biochemistry, Genetics and Molecular Biology (miscellaneous),General Materials Science,General Chemical Engineering,Medicine (miscellaneous)