α‐Fe 2 O 3 Nanorings Prepared by a Microwave‐Assisted Hydrothermal Process and Their Sensing Properties

Free-standing α-Fe2O3 nanorings are synthesized in solution through a rapid microwave-assisted hydrothermal process. The ringlike structure is a new member in the family of iron oxide nanostructures. The sensors made of the α-Fe2O3 nanorings exhibit high sensitivity not only for bio-sensing of hydrogen peroxide in a physiological solution but also for gas-sensing of alcohol vapor at room temperature. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2089/2007/c2176_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…