New answers tagged nanoscience
"Black Gold: Plasmonic Colloidosomes with Broadband Absorption Self-Assembled from Monodispersed Gold Nanospheres by Using a Reverse Emulsion System" describes a similar phenomena of red gold nanoparticles assembling into black 3D structures, except they had to go through more steps than just drying them.
These are apparently different phenomena, but with inconsistent uses. From this article, "Distinguishing between aggregates and agglomerates of flame-made $TiO_2$ by high-pressure dispersion": Dispersing these suspensions through a nozzle at 200 to 1400 bar reduced the size of agglomerates (particles bonded by weak physical forces) resulting in bimodal ...
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