Abstract
The self-assembled structures of atomically precise, ligand-protected noble metal nanoclusters leading to encapsulation of plasmonic gold nanorods (GNRs) is presented. Unlike highly sophisticated DNA nanotechnology, this strategically simple hydrogen bonding-directed self-assembly of nanoclusters leads to octahedral nanocrystals encapsulating GNRs. Specifically, the p-mercaptobenzoic acid (pMBA)-protected atomically precise silver nanocluster, Na4[Ag44(pMBA)30], and pMBA-functionalized GNRs were used. High-resolution transmission and scanning transmission electron tomographic reconstructions suggest that the geometry of the GNR surface is responsible for directing the assembly of silver nanoclusters via H-bonding, leading to octahedral symmetry. The use of water-dispersible gold nanoclusters, Au≈250(pMBA)n and Au102(pMBA)44, also formed layered shells encapsulating GNRs. Such cluster assemblies on colloidal particles are a new category of precision hybrids with diverse possibilities.
Original language | English |
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Pages (from-to) | 6522-6526 |
Journal | Angewandte Chemie - International Edition |
Volume | 57 |
Issue number | 22 |
Early online date | 1 Jan 2018 |
DOIs | |
Publication status | Published - May 2018 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Atomically precise nanoclusters
- Hydrogen bonding
- Plasmonic gold nanorods
- Self-assembly
- Supramolecular chemistry
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Equipment
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OtaNano - Nanomicroscopy Center
Janne Ruokolainen (Manager)
Department of Applied PhysicsFacility/equipment: Facility