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Updated: Feb 12, 2026

Assembly of Gold Nanorods into Chiral Plasmonic Metamolecules Using DNA Origami Templates

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Published on: March 5, 2019

Atomically Precise Nanocluster Assemblies Encapsulating Plasmonic Gold Nanorods.

Amrita Chakraborty¹, Ann Candice Fernandez^1,2, Anirban Som¹

¹DST Unit of Nanoscience and Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India.

Angewandte Chemie (International Ed. in English)

|April 3, 2018

Summary

Atomically precise silver nanoclusters self-assemble using hydrogen bonding to encapsulate plasmonic gold nanorods (GNRs) into octahedral nanocrystals. This simple method creates novel precision hybrids with diverse applications.

Keywords:

atomically precise nanoclusters hydrogen bonding plasmonic gold nanorods self-assembly supramolecular chemistry

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Published on: March 22, 2020

Area of Science:

Materials Science
Nanotechnology
Supramolecular Chemistry

Background:

Noble metal nanoclusters offer unique optical and electronic properties.
Encapsulating plasmonic gold nanorods (GNRs) within nanoclusters presents challenges in precise structural control.
Existing methods like DNA nanotechnology are complex for creating such hybrid structures.

Purpose of the Study:

To present a simple, hydrogen bonding-directed self-assembly method for creating nanocluster-encapsulated GNRs.
To demonstrate the formation of octahedral nanocrystals around GNRs using specific silver nanoclusters.
To explore the potential of this method for creating new categories of precision hybrid nanomaterials.

Main Methods:

Utilized p-mercaptobenzoic acid (pMBA)-protected silver nanoclusters (Na4[Ag44(pMBA)30]) and pMBA-functionalized GNRs.
Employed hydrogen bonding interactions to direct the self-assembly process.
Applied high-resolution transmission and scanning transmission electron tomography for structural analysis.

Main Results:

Achieved self-assembly of silver nanoclusters around GNRs, forming octahedral nanocrystals.
Demonstrated that GNR surface geometry directs nanocluster assembly via hydrogen bonding.
Showcased encapsulation of GNRs by layered shells of water-dispersible gold nanoclusters (Au≈250(pMBA)n and Au102(pMBA)44).

Conclusions:

A straightforward, hydrogen bonding-driven self-assembly strategy effectively creates precision nanocluster-GNR hybrids.
The geometry of GNRs plays a crucial role in directing the symmetrical assembly of nanoclusters.
This approach establishes a new class of precision hybrid materials with broad application potential.