Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. High-Resolution Scanning Tunneling Microscopy Characterization of Mixed Monolayer Protected Gold Nanoparticles
 
research article

High-Resolution Scanning Tunneling Microscopy Characterization of Mixed Monolayer Protected Gold Nanoparticles

Ong Khac, Quy  
•
Reguera, Javier
•
Silva, Paulo Jacob
Show more
2013
Acs Nano

Gold nanoparticles protected by a binary mixture of thiolate molecules have a ligand shell that can spontaneously separate into nanoscale domains. Complex morphologies arise in such ligand shells, including striped, patchy, and Janus domains. Characterization of these morphologies remains a challenge. Scanning tunneling microscopy (STM) imaging has been one of the key approaches to determine these structures, yet the imaging of nanoparticles' surfaces faces difficulty stemming from steep surface curvature, complex molecular structures, and the possibility of Imaging artifacts In the same size range. Images obtained to date have lacked molecular resolution, and only domains have been resolved. There is a clear need for images that resolve the molecular arrangement that leads to domain formation on the ligand shell of these particles. Herein we report an advance in the STM Imaging of gold nanoparticles, revealing some of the molecules that constitute the domains in striped and Janus gold nanoparticles. We analyze the images to determine molecular arrangements on parts of the particles, highlight molecular "defects" present in the ligand shell, show persistence of the features across subsequent images, and observe the transition from quasi-molecular to domain resolution. The ability to resolve single molecules in the ligand shell of nanoparticles could lead to a more comprehensive understanding of the role of the ligand structure in determining the properties of mixed-monolayer-protected gold nanoparticles.

  • Details
  • Metrics
Type
research article
DOI
10.1021/nn402414b
Web of Science ID

WOS:000326209100022

Author(s)
Ong Khac, Quy  
Reguera, Javier
Silva, Paulo Jacob
Moglianetti, Mauro  
Harkness, Kellen
Longobardi, Maria
Mali, Kunal S.
Renner, Christoph
De Feyter, Steven
Stellacci, Francesco  
Date Issued

2013

Publisher

American Chemical Society

Published in
Acs Nano
Volume

7

Issue

10

Start page

8529

End page

8539

Subjects

scanning tunneling microscopy

•

STM

•

striped nanoparticles

•

Janus nanoparticles

•

self-assembled monolayer

•

SAM

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SUNMIL  
Available on Infoscience
December 9, 2013
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/97734
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés