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Preparation of fluorescent tellurium nanowires at room temperature

Crystal Growth and Design, ISSN: 1528-7483, Vol: 8, Issue: 1, Page: 351-357
2008
  • 143
    Citations
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  • 44
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Metrics Details

  • Citations
    143
    • Citation Indexes
      143
  • Captures
    44

Article Description

We have demonstrated a simple approach to the synthesis of fluorescent trigonal tellurium (t-Te) nanowires in aqueous solution at room temperature. The t-Te nanowires were prepared from the reduction of tellurium dioxide (TeO ) with concentrated hydrazine solution through deposition of Te atoms that were reduced from telluride ions (Te) and dissolved from amorphous tellurium (a-Te) nanoparticles onto t-Te nanocrystallines. By carefully controlling the growth time from 40 to 120 min, we prepared different sizes of t-Te nanowires; the length changed from 251 to 879 nm, while the diameter only grew from 8 to 19 nm. The absorption wavelength against the diameter of t-Te nanowires displays the diameter dependence of band I (<300 nm). On the other hand, the absorption wavelength against the length of t-Te nanowires displays the length dependence of band II (>600 nm). By increasing the size of t-Te nanowires, their absorption is under a red shift. For example, the maximum wavelengths of the absorption bands for the t-Te nanowires with the lengths of 251 nm are 271 and 602 nm, while those for 879 nm t-Te nanowires are at 280 and 687 nm, respectively. Deconvolution of the photoluminescence profile for t-Te nanowires obtained at 120 min yields four Gaussian peaks centered at 334, 397, 460, and 507 nm. © 2008 American Chemical Society.

Bibliographic Details

Zong Hong Lin; Zusing Yang; Huan Tsung Chang

American Chemical Society (ACS)

Chemistry; Materials Science; Physics and Astronomy

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