Abstract
Atomic and molecular layer deposition (ALD and MLD,
respectively) techniques are examples of self-assembly
based on repeated cycles of self-limiting gas-solid
reactions. The precursors are pulsed into a reactor
alternately, separated by inert gas pulses. During a
single cycle, only one molecular layer is deposited on
the surface, enabling tailored film composition in
principle down to molecular resolution on ideal surfaces.
These cycles are repeated until a layer with a specific
thickness is achieved. Few materials are, however, ideal.
During the early film growth precursors adsorb onto the
surface and absorb into the near-surface regions
depending both on the substrate and the deposition
parameters. These precursors can react with the substrate
affecting e.g. mechanical, barrier and surface
properties. The deposited material starts then to form
clusters leading to nonuniform early film growth. The
purpose of this presentation is to demonstrate that thin
and non-uniform layers can be used to tailor the surface
characteristics of different substrates. For example,
print quality (ink spreading and penetration) of inkjet
printing on polymer films can be adjusted with metal
oxide. Secondly, this can be used to control water
penetration into porous nonwovens. Third example
demonstrates how adhesion of extrusion coated biopolymer
to inorganic oxides can be improved with a novel hybrid
layer based on lactic acid. As the amount of material to
be deposited is small, this will help to increase the
speed in ALD/MLD processes designed for moving webs.
Original language | English |
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Publication status | Published - 2013 |
Event | 7th International Conference on Materials for Advanced Technologies, ICMAT 2013 - Singapore, Hong Kong Duration: 30 Jun 2013 → 5 Jul 2013 |
Conference
Conference | 7th International Conference on Materials for Advanced Technologies, ICMAT 2013 |
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Abbreviated title | ICMAT 2013 |
Country/Territory | Hong Kong |
City | Singapore |
Period | 30/06/13 → 5/07/13 |
Keywords
- adhesion
- ALd
- atomic layer deposition
- hybrid
- inorganic
- surface treatment