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Atomically Precise Nanocluster Assemblies Encapsulating Plasmonic Gold Nanorods
Author(s) -
Chakraborty Amrita,
Fernandez Ann Candice,
Som Anirban,
Mondal Biswajit,
Natarajan Ganapati,
Paramasivam Ganesan,
Lahtinen Tanja,
Häkkinen Hannu,
Pradeep Thalappil
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201802420
Subject(s) - nanoclusters , nanorod , nanotechnology , materials science , nanocrystal , self assembly , nanostructure , plasmon , noble metal , metal , optoelectronics , metallurgy
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 ( p MBA)‐protected atomically precise silver nanocluster, Na 4 [Ag 44 ( p MBA) 30 ], and p MBA‐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 ( p MBA) n and Au 102 ( p MBA) 44 , also formed layered shells encapsulating GNRs. Such cluster assemblies on colloidal particles are a new category of precision hybrids with diverse possibilities.