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Reorganization of nanopatterned polymer brushes by the AFM measurement process

Patra, Michael LU and Linse, Per LU (2006) In Macromolecules 39(13). p.4540-4546
Abstract
The interaction between a nanopatterned polymer brush and a rigid pyramidal body representing an AFM tip has been investigated using molecular dynamics ( MD) simulation. The computed forces for varying position and penetration depth are systematically contrasted with the density and pressure tensor profiles of the unperturbed brush. For weak penetration of the AFM tip in the brush, we find that the force can quantitatively be computed from the properties of the unperturbed brush after folding with the geometry of the AFM tip. This steric effect leads to a force profile that is significantly wider than the physical brush. The structure of the perturbed brush has also been examined, and we show that for deep penetration of the AFM tip more... (More)
The interaction between a nanopatterned polymer brush and a rigid pyramidal body representing an AFM tip has been investigated using molecular dynamics ( MD) simulation. The computed forces for varying position and penetration depth are systematically contrasted with the density and pressure tensor profiles of the unperturbed brush. For weak penetration of the AFM tip in the brush, we find that the force can quantitatively be computed from the properties of the unperturbed brush after folding with the geometry of the AFM tip. This steric effect leads to a force profile that is significantly wider than the physical brush. The structure of the perturbed brush has also been examined, and we show that for deep penetration of the AFM tip more than half of the force originates from the reorganization of the brush. (Less)
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author
and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Macromolecules
volume
39
issue
13
pages
4540 - 4546
publisher
The American Chemical Society (ACS)
external identifiers
  • wos:000238385900041
  • scopus:33746357876
ISSN
0024-9297
DOI
10.1021/ma0606410
language
English
LU publication?
yes
id
06b40f7c-4774-48d4-ab71-e0616ed20a23 (old id 405946)
date added to LUP
2016-04-01 11:39:16
date last changed
2021-02-17 02:12:41
@article{06b40f7c-4774-48d4-ab71-e0616ed20a23,
  abstract     = {The interaction between a nanopatterned polymer brush and a rigid pyramidal body representing an AFM tip has been investigated using molecular dynamics ( MD) simulation. The computed forces for varying position and penetration depth are systematically contrasted with the density and pressure tensor profiles of the unperturbed brush. For weak penetration of the AFM tip in the brush, we find that the force can quantitatively be computed from the properties of the unperturbed brush after folding with the geometry of the AFM tip. This steric effect leads to a force profile that is significantly wider than the physical brush. The structure of the perturbed brush has also been examined, and we show that for deep penetration of the AFM tip more than half of the force originates from the reorganization of the brush.},
  author       = {Patra, Michael and Linse, Per},
  issn         = {0024-9297},
  language     = {eng},
  number       = {13},
  pages        = {4540--4546},
  publisher    = {The American Chemical Society (ACS)},
  series       = {Macromolecules},
  title        = {Reorganization of nanopatterned polymer brushes by the AFM measurement process},
  url          = {http://dx.doi.org/10.1021/ma0606410},
  doi          = {10.1021/ma0606410},
  volume       = {39},
  year         = {2006},
}