TITLE

Hexagonal nanotubes of ZnS by chemical conversion of monocrystalline ZnO columns

AUTHOR(S)
Dloczik, L.; Engelhardt, R.; Ernst, K.; Fiechter, S.; Sieber, I.; Ko¨nenkamp, R.
PUB. DATE
June 2001
SOURCE
Applied Physics Letters;6/4/2001, Vol. 78 Issue 23, p3687
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Monocrystalline ZnO columns grown in electrodeposition were converted to ZnS using ion exchange reactions in H[sub 2]S or S vapor. At ∼400 °C the reaction with H[sub 2]S only affects a thin layer of 10-30 nm thickness at the surface of the ZnO crystallites, and ZnS-coated ZnO columns are produced. Exploiting the large difference in etch resistance between ZnS and ZnO, the ZnO core of the columns can be removed, and a tubular structure of ZnS can be prepared. Typical dimensions of the ZnS tubes are a length of 1-3 μm, a diameter of 100-300 nm, and a wall thickness of 10-30 nm. The ZnS tubes have the same distribution, alignment, and surface morphology as the original ZnO columns. The reaction in S vapor is suitable to produce solid ZnS columns. © 2001 American Institute of Physics.
ACCESSION #
4710233

 

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