Following in Real Time the Two-Step Assembly of Nanoparticles into Mesocrystals in Levitating Drops

Michael Agthe, Tomás S. Plivelic, Ana Labrador, Lennart Bergström, German Salazar-Alvarez

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review

44 Citeringar (SciVal)

Sammanfattning

Mesocrystals composed of crystallographically aligned nanocrystals are present in biominerals and assembled materials which show strongly directional properties of importance for mechanical protection and functional devices. Mesocrystals are commonly formed by complex biomineralization processes and can also be generated by assembly of anisotropic nanocrystals. Here, we follow the evaporation-induced assembly of maghemite nanocubes into mesocrystals in real time in levitating drops. Analysis of time-resolved small-angle X-ray scattering data and ex situ scanning electron microscopy together with interparticle potential calculations show that the substrate-free, particle-mediated crystallization process proceeds in two stages involving the formation and rapid transformation of a dense, structurally disordered phase into ordered mesocrystals. Controlling and tailoring the particle-mediated formation of mesocrystals could be utilized to assemble designed nanoparticles into new materials with unique functions.

Originalspråkengelska
Sidor (från-till)6838-6843
Antal sidor6
TidskriftNano Letters
Volym16
Utgåva11
DOI
StatusPublished - 2016 nov. 9

Ämnesklassifikation (UKÄ)

  • Materialkemi

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