Facet-selective asymmetric functionalization of anisotropic gold nanoprisms for Janus particle synthesis

Janus particles, which possess asymmetric structures and/or multiple surface chemistries, have attracted intense interest due to their capability of multiple distinct interactions with their environment. Most Janus particles synthesis techniques rely on applying coating molecules on isotropic partic...

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Bibliographic Details
Published in:Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2020-06, Vol.22 (6), Article 142
Main Authors: Chowdhury, Emtias, Grapperhaus, Craig A., O’Toole, Martin G.
Format: Article
Language:English
Subjects:
Anisotropy
Asymmetric structures
Characterization and Evaluation of Materials
Chemical synthesis
Chemistry and Materials Science
Chloroform
Gold
Hexadecane
Hydrophobicity
Inorganic Chemistry
Interfaces
Lasers
Materials Science
Nanomaterials
Nanoparticles
Nanotechnology
Oligonucleotides
Optical Devices
Optics
Photonics
Physical Chemistry
Polymers
Research Paper
Self-assembly
Solvents
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Summary:Janus particles, which possess asymmetric structures and/or multiple surface chemistries, have attracted intense interest due to their capability of multiple distinct interactions with their environment. Most Janus particles synthesis techniques rely on applying coating molecules on isotropic particles. Herein, we demonstrate a method to controllably functionalize both major facets of geometrically anisotropic triangular gold nanoprisms in the size range of 100–200 nm with two distinct molecular coatings (hexadecane thiol or thiolated poly (ethylene) glycol and thiol-modified oligonucleotide), giving rise to the formation of Janus gold nanoprisms. Janus particles orient themselves on the interface of water-chloroform mixture and exhibit variable interaction with both hydrophilic and hydrophobic surfaces due to their amphiphilicity and undergo asymmetric self-assembly behavior with other nanoparticles.
ISSN:1388-0764
1572-896X
DOI:10.1007/s11051-020-04879-7