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Journal Article

Oberflächen passen sich an - bürstenartige Polymermoleküle an Oberflächen mit schaltbaren Eigenschaften

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Ionov, Leonid
Max Planck Institute of Molecular Cell Biology and Genetics, Max Planck Society;

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Citation

Uhlmann, P., Houbenov, N., Ionov, L., Motornov, M., Minko, S., & Stamm, M. (2007). Oberflächen passen sich an - bürstenartige Polymermoleküle an Oberflächen mit schaltbaren Eigenschaften. Wissenschaftliche Zeitschrift der Technischen Universität Dresden, 56(1/2), 47-52.

Abstract

It is the surface which in many
cases determines the appearance
and application-relevant properties
of a material. Thin films of polymer
brushes just a few nanometres
in thickness can change the
surface properties significantly
and may provide even switching
capabilities, where the thin film
will for instance take up or repel
water. Polymer brushes of two
largely different polymer materials
must in this case be tightly attached
at one end to a solid substrate
and will then occupy alternatively
the upper or lower surface
layer, depending on external
conditions. In this way, either one
or the other polymer material will
be exposed and influence the surface
properties. This purely physical
switching process can be controlled
by external triggers (selective
or non-selective solvents, pH
value, temperature, etc.). The physico-
chemical surface properties
(wettability, functionality etc.)
switch between values established
by the properties of the
polymer materials involved.