Light-controlled self-assembly of reversible and irreversible nanoparticle suprastructures
2007; National Academy of Sciences; Volume: 104; Issue: 25 Linguagem: Inglês
10.1073/pnas.0611371104
ISSN1091-6490
AutoresRafał Klajn, Kyle J. M. Bishop, Bartosz A. Grzybowski,
Tópico(s)Luminescence and Fluorescent Materials
ResumoNanoparticles (NPs) decorated with ligands combining photoswitchable dipoles and covalent cross-linkers can be assembled by light into organized, three-dimensional suprastructures of various types and sizes. NPs covered with only few photoactive ligands form metastable crystals that can be assembled and disassembled "on demand" by using light of different wavelengths. For higher surface concentrations, self-assembly is irreversible, and the NPs organize into permanently cross-linked structures including robust supracrystals and plastic spherical aggregates.
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