Nanoscale structural engineering via phase segregation: Au-Ge system

Yu Lun Chueh, Cosima N. Boswell, Chun Wei Yuan, Swanee J. Shin, Kuniharu Takei, Johnny C. Ho, Hyunhyub Ko, Zhiyong Fan, E. E. Haller, D. C. Chrzan, Ali Javey

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


A tunable structural engineering of nanowires based on template-assisted alloying and phase segregation processes is demonstrated. The Au-Ge system, which has a low eutectic temperature and negligible solid solubility (< 10-3 atom %) of Au in Ge at low temperatures, is utilized. Depending on the Au concentration of the initial nanowires. final structures ranging from nearly periodic nanodlsk patterns to core/shell and fully alloyed nanowires are produced. The formation mechanisms are discussed in detail and characterized by in situ transmission electron microscopy and energy-dispersive spectrometry analyses. Electrical measurements illustrate the metallic and semiconducting characteristics of the fully alloyed and alternating Au/Ge nanodisk structures, respectively.

Original languageEnglish
Pages (from-to)393-397
Number of pages5
JournalNano Letters
Issue number2
Publication statusPublished - Feb 10 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

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


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