6533b7d4fe1ef96bd1263249

RESEARCH PRODUCT

Template-Free Supracolloidal Self-Assembly of Atomically Precise Gold Nanoclusters : From 2D Colloidal Crystals to Spherical Capsids

Hannu HäkkinenNonappaTanja LahtinenJohannes S. HaatajaOlli IkkalaTiia-riikka Tero

subject

Materials scienceta221DispersityNanotechnology02 engineering and technology010402 general chemistry01 natural sciencesCatalysissupramolecular chemistryNanoclustersColloidgoldnanoclusterssupramolekulaarinen kemiaGold nanoclustersta116colloid self-organizationTemplate freeAqueous solutionvetysidoksetta114Hydrogen bondColloidal self-assemblyGeneral ChemistryGeneral MedicineColloidal crystal021001 nanoscience & nanotechnology0104 chemical scienceshydrogen bondscolloidal crystalsSelf-assembly0210 nano-technology

description

We report supracolloidal self-assembly of atomically precise and strictly monodisperse gold nanoclusters involving p-mercaptobenzoic acid ligands (Au102-pMBA44) under aqueous conditions into hexagonally packed monolayer-thick two-dimensional facetted colloidal crystals (thickness 2.7 nm) and their bending to closed shells leading to spherical capsids (d ca. 200 nm), as controlled by solvent conditions. The 2D colloidal assembly is driven in template-free manner by the spontaneous patchiness of the pMBA ligands around the Au102-pMBA44 nanoclusters preferably towards equatorial plane, thus promoting inter-nanocluster hydrogen bonds and high packing to planar sheets. More generally, the findings encourage to explore atomically precise nanoclusters towards highly controlled colloidal self-assemblies. peerReviewed

yearjournalcountryeditionlanguage
2016-11-23
http://urn.fi/URN:NBN:fi:jyu-201704051909