Nano Research

, Volume 2, Issue 1, pp 54–60

Formation of Na0.44MnO2 nanowires via stress-induced splitting of birnessite nanosheets


  • Yanguang Li
    • Department of ChemistryThe Ohio State University
    • Department of ChemistryThe Ohio State University

DOI: 10.1007/s12274-009-9003-1


High aspect ratio Na0.44MnO2 nanowires with a complex one-dimensional (1-D) tunnel structure have been synthesized. We found that the reaction went through layered birnessite nanosheet intermediates, and that their conversion to the final product involved splitting of the nanosheets into nanowires. Based on our observations, a stress-induced splitting mechanism for conversion of birnessite nanosheets to Na0.44MnO2 nanowires is proposed. The final and intermediate phases show topotaxy with 〈001〉f // 〈020〉b or 〈110〉b where f represents the final Na0.44MnO2 phase and b the intermediate birnessite phase. As a result of their high surface areas, the nanowires are efficient catalysts for the oxidation of pinacyanol chloride dye.


Birnessite manganese oxide nanowire nanosheet stress conversion

Supplementary material

12274_2009_9003_MOESM1_ESM.pdf (1.6 mb)
Supplementary material, approximately 1.62 MB.

Copyright information

© Tsinghua University Press and Springer Berlin Heidelberg 2009