Carbonaceous submicron sized islands: a surface patterning route to hierarchical macro-mesoporous thin films

ZELCER, ANDRÉS; WOLOSIUK, ALEJANDRO; SOLER-ILLIA, GALO

JOURNAL OF MATERIALS CHEMISTRY

Año: 2009 vol. 19 p. 4191 - 4196

0959-9428

<!-- /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-noshow:yes; mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; mso-bidi-font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-ansi-language:EN-GB; mso-fareast-language:EN-GB;} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> A simple patterning method is presented, using by first time dewetting as a surface exotemplate generating technique, producing disk-like features of micron to submicron size. The localization of the templates is such that a large area of the substrate is covered when compared with other techniques like colloidal templating or nanosphere lithography. The method is accessible and convenient and can be used to pattern areas of several dm2. Hierarchical ordered mesoporous SiO2 thin films possessing submicron sized cavities were prepared by combining this patterning method with sol-gel and surfactant templating. The mesopore arrangement was found to be severely influenced by the constraints imposed by the surface topology, leading to a different crystalline orientation