| Publication Type |
Journal Article |
| Title |
Nanopatterning in Langmuir-Blodgett Monolayers of a Thermoresponsive Double Hydrophilic Block Copolymer Studied by Atomic Force Microscopy |
| Authors |
Rute I. S. Romao Quirina Ferreira Jorge Morgado J. M. G. Martinho Amélia Gonçalves da Silva |
| Groups |
MET |
| Journal |
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY |
| Year |
2011 |
| Month |
April |
| Volume |
11 |
| Number |
4 |
| Pages |
3151-3161 |
| Abstract |
The microphase-separation of Langmuir-Blodgett (LB) monolayers of a rhodamine B (RhB) end-labeled double hydrophilic block copolymer (DHBC), RhB-Poly(N,N-dimethylacrylamide)-b-poly(N,N-diethylacryl-amide) (RhB-PDMA(207)b-PDEA(177)) and the 1:1 segmental mixture of PDEA and RhB-PDMA homopolymers was followed by AFM. The DHBC LB films revealed a loose distribution of nano-aggregates with variable geometries below the lower critical solution temperature (LCST) of PDEA (32 degrees C) and low surface pressure (3 mN m(-1)). By increasing either the temperature above the LOST of PDEA or the surface pressure beyond the immersion regime of PDMA in the subphase (7 mN m(-1)) a dense nanopatterning was obtained. The absence of a corresponding regular nanopatterning in LB films of mixed homopolymers with the same composition highlights the role of the covalent bonding between PDEA and PDMA on the self-segregation of the two blocks at the air-water interface. |
| DOI |
http://dx.doi.org/10.1166/jnn.2011.3726 |
| ISBN |
|
| Publisher |
AMER SCIENTIFIC PUBLISHERS |
| Book Title |
|
| ISSN |
1533-4880 |
| EISSN |
|
| Conference Name |
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| Bibtex ID |
ISI:000289176100053 |
| Observations |
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