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research article

Comparative STM studies of mixed ligand monolayers on gold nanoparticles in air and in 1-phenyloctane

Quy, Khac Ong  
•
Zhao, Shun  
•
Reguera, Javier
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2014
Chemical Communications (ChemComm)

Scanning tunnelling microscopy (STM) studies have found stripe-like domains on gold nanoparticles (NPs) coated with certain binary mixtures of ligand molecules. The majority of these NPs' properties have been investigated for particles in solvents. Yet, most STM studies are for NPs in a dry state. Images of the same particles in air and liquid have not been obtained yet. In this work, a judicious choice of ligand molecules led to NPs with close-to-ideal STM imaging conditions in air and in 1-phenyloctane (PO). Large datasets under both conditions were acquired and rapidly evaluated through power spectral density (PSD) analysis. The result is a quantitative comparison of stripe-like domains in air and PO on the same NPs. PSD analysis determines a characteristic length-scale for these domains of similar to 1.0 nm in air and in PO showing persistence of striped domains in these two media. A length scale of similar to 0.7 nm for homoligand NPs was found.

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Type
research article
DOI
10.1039/c4cc04114c
Web of Science ID

WOS:000340898400025

Author(s)
Quy, Khac Ong  
Zhao, Shun  
Reguera, Javier
Biscarini, Fabio
Stellacci, Francesco  
Date Issued

2014

Publisher

Royal Society of Chemistry

Published in
Chemical Communications (ChemComm)
Volume

50

Issue

72

Start page

10456

End page

10459

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SUNMIL  
Available on Infoscience
October 23, 2014
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/107874
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