Evolution of dendritic platinum nanosheets into ripening-resistant holey sheets

Yujiang Song, Michael A. Hickner, Sivakumar R. Challa, Rachel M. Dorin, Robert M. Garcia, Haorong Wang, Ying Bing Jiang, Peng Li, Yan Qiu, Frank Van Swol, Craig J. Medforth, James E. Miller, Tochi Nwoga, Kazuo Kawahara, Wen Li, John A. Shelnutt

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

Under electron-beam irradiation, dendritic platinum nanosheets structurally evolve into metastable "holey" nanosheets. Monte Carlo simulations of this structural transformation agree well with electron microscope images detailing the ripening process. The experiments and simulations show that nanoscale holes of a critical size are persistent and give holey sheets their morphological stability and sustained high surface area. Platinum nanostructures composed of these holey nanosheets exhibit improved durability in electrocatalytic reactions due to their remarkable ripening resistance.

Original languageEnglish (US)
Pages (from-to)1534-1539
Number of pages6
JournalNano letters
Volume9
Issue number4
DOIs
StatePublished - Apr 8 2009

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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    Song, Y., Hickner, M. A., Challa, S. R., Dorin, R. M., Garcia, R. M., Wang, H., Jiang, Y. B., Li, P., Qiu, Y., Van Swol, F., Medforth, C. J., Miller, J. E., Nwoga, T., Kawahara, K., Li, W., & Shelnutt, J. A. (2009). Evolution of dendritic platinum nanosheets into ripening-resistant holey sheets. Nano letters, 9(4), 1534-1539. https://doi.org/10.1021/nl803582j