Growth of single-crystal double-directional tellurium nanoneedles from CdTe nnocrystals in slution

Zhengtao Deng, Dong Chen, Fangqiong Tang, Masud Mansuripur

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

Single-crystal double-directional tellurium (Te) nanoneedles were grown by a facile route of air oxidation of CdTe nanocrystals in aqueous solution containing ammonia. The as-synthesized Te nanoneedles with a relatively high yield and uniformity grew along the [001] crystalline direction with lengths of 2-4 μm and stem diameters of 80-120 nm, and gradually becoming thinner to form sharp tips of sub-5 nm. The double-directional nanoneedles were straight, with high purity, well-crystallized, and dislocation-free, according to range of methods such as X-ray powder diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, high-resolution transmission microscopy, and selected area electron diffraction. The detailed transformation process from CdTe nanocrystals to single-crystal double-directional Te nanoneedles was studied. It is expected that the single-crystal double-directional Te nanoneedles would be a very promising new member of field emitters, probes of atomic force microscopy, and used in the manufacture of functional nanodevices.

Original languageEnglish (US)
Pages (from-to)1823-1828
Number of pages6
JournalCrystal Growth and Design
Volume9
Issue number4
DOIs
StatePublished - Apr 1 2009

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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