Highly Ordered Arrays of Mesoporous Silica Nanorods with Tunable Aspect Ratios from Block Copolymer Thin Films

Abstract

Highly ordered arrays of mesoporous silica nanorods with a tunable aspect ratio can be fabricated using PEOm-b-PMA(Az)n block copolymer thin films as templates. Together, penetration of the films by the silica precursor and the film thickness control the SiO2 nanorod growth, and heights of almost 200 nm can be achieved. Inside the SiO2 nanorods, mesochannels with a diameter of ∼ 2 nm are formed that are aligned along the longitudinal axis of the rod. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2089/2008/c2010_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.