Answers are grounded in this paper and cite their sources.
Nanoparticle coating: A suspension of colloidal particles in a water/propanol solution was layered onto a water surface, where the particles self-assembled into ordered two-dimensional hexagonal crystal arrays (>280 cm2) within two minutes. These arrays were transferred from the water surface to other substrates (see picture) and embedded in a chitosan hydrogel for visual detection of the pH value.
No takes yet. Share an insight, caveat, or question.
Zhang et al. (2012) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: