INVESTIGADORES
BARBERO Cesar Alfredo
artículos
Título:
Smart Surfaces: Reversible Switching of a Polymeric Hydrogel Topography
Autor/es:
M. A. MOLINA; C.R. RIVAROLA; M. BROGLIA; D.F. ACEVEDO; C.A. BARBERO
Revista:
SOFT MATTER
Editorial:
ROYAL SOC CHEMISTRY
Referencias:
Lugar: CAMBRIDGE; Año: 2012 vol. 8 p. 307 - 310
ISSN:
1744-683X
Resumen:
Patterns imprinted on smart surfaces are fabricated by directlaser interference patterning (DLIP) of thick films based onpoly(N-isopropylacrylamide) (PNIPAM) doped with suitabledyes. Optical and Atomic Force (AFM) microscopy images10 reveal that the pattern imprinted on the dry hydrogel film(line-arrays) becomes flat by swelling of the hydrogel uponimmersion in water. The pattern re-emerges after drying thehydrogel. Heating the hydrogel above the phase transitiontemperature of PNIPAM (ca. 32 oC) also restores the pattern15 by hydrogel volume collapse. This behaviour suggests thatthis patterning technique allow us to produce surfaces usefulfor technological application.
