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  4. High-resolution imaging of solvation structures with amplitude-modulation atomic force microscopy
 
conference paper

High-resolution imaging of solvation structures with amplitude-modulation atomic force microscopy

Voitchovsky, Kislon  
•
Ricci, Maria  
2012
Colloidal Nanocrystals For Biomedical Applications Vii
Conference on Colloidal Nanocrystals for Biomedical Applications VII

At the interface with solids, liquid molecules tend to adopt a particular structural arrangement, which depends on the local interplay of forces between the solid and the liquid. As a result, this interfacial liquid does not behave like bulk liquid, often exhibiting higher densification and ordering (solvation structure) that strongly depends on the local properties of the solid surface. Being a link between a solid and its surroundings, the interfacial liquid largely determines how a particular solid will interact with its environment. This is particularly relevant for nanomedicine where synthetic nano-objects are injected in a liquid environment for therapeutic purposes. Experimentally, little is known about the local structure and properties of interfacial liquid due to the lack of techniques offering sufficient resolution over inhomogeneous surfaces. Recently we demonstrated how amplitude-modulation atomic force microscopy (AM-AFM) could be used to probe and quantify solid-liquid interfaces locally and with sub-nanometer resolution. Here we apply this technique to compare the interface formed by selected solids with water, dimethylsulfoxide and 1-hexanol. The results highlight differences in the solvation structure formed by the different liquids over a same solid. Importantly, our results show that AM-AFM images reflect the structure of the interfacial liquid, which is not necessarily following the atomic structure of the interfaced solid in a trivial manner. These findings have important implications for the interpretation of AM-AFM images in liquid.

  • Details
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Type
conference paper
DOI
10.1117/12.905864
Web of Science ID

WOS:000302562300014

Author(s)
Voitchovsky, Kislon  
Ricci, Maria  
Date Issued

2012

Publisher

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa

Published in
Colloidal Nanocrystals For Biomedical Applications Vii
ISBN of the book

978-0-8194-8875-6

Series title/Series vol.

Proceedings of SPIE; 8232

Start page

82320O

Subjects

Solid-liquid interfaces

•

Solvation structure

•

Atomic Force microscopy

•

Work of adhesion

•

Solid-Liquid Interfaces

•

Energy-Dissipation

•

Scale

•

Order

Editorial or Peer reviewed

NON-REVIEWED

Written at

EPFL

EPFL units
SUNMIL  
Event nameEvent placeEvent date
Conference on Colloidal Nanocrystals for Biomedical Applications VII

San Francisco, CA

Jan 21-22, 2012

Available on Infoscience
May 11, 2012
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/80279
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