OBSERVATION OF IN SITU AND EX SITU OXIDATION PROCESSES FOR ZnTe SURFACES BY HIGH-RESOLUTION ELECTRON MICROSCOPY.

Ping Lu, David Smith

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The oxidation of ZnTe surfaces, both in situ and ex situ, is studied by high-resolution electron microscopy. For in situ oxidation, the oxidation sequence involved amorphization of the ZnTe crystal as Te is removed by a non-thermal electron stimulated process, with subsequent formation of hexagonal ZnO by oxygen diffusion into the sample. In ex situ oxidation, the main phases present are crystals of ZnO and Te metal, which usually give rise to layered surface regions, in the sequence ZnTe/Te/ZnO, with the large crystals (up to 100 nm) of Te in an epitaxial relationship with the bulk ZnTe and the small ZnO crystals (5 nm) in random orientations. This process involves the diffusion of Zn from the bulk ZnTe to the surface followed by reaction with oxygen in air to form ZnO.

Original languageEnglish (US)
Pages (from-to)681-691
Number of pages11
JournalPhysica Status Solidi (A) Applied Research
Volume107
Issue number2
StatePublished - Jun 1988

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High resolution electron microscopy
electron microscopy
Oxidation
Crystals
oxidation
high resolution
crystals
Oxygen
Amorphization
oxygen
Crystal orientation
Metals
Electrons
air
Air
metals
electrons

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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title = "OBSERVATION OF IN SITU AND EX SITU OXIDATION PROCESSES FOR ZnTe SURFACES BY HIGH-RESOLUTION ELECTRON MICROSCOPY.",
abstract = "The oxidation of ZnTe surfaces, both in situ and ex situ, is studied by high-resolution electron microscopy. For in situ oxidation, the oxidation sequence involved amorphization of the ZnTe crystal as Te is removed by a non-thermal electron stimulated process, with subsequent formation of hexagonal ZnO by oxygen diffusion into the sample. In ex situ oxidation, the main phases present are crystals of ZnO and Te metal, which usually give rise to layered surface regions, in the sequence ZnTe/Te/ZnO, with the large crystals (up to 100 nm) of Te in an epitaxial relationship with the bulk ZnTe and the small ZnO crystals (5 nm) in random orientations. This process involves the diffusion of Zn from the bulk ZnTe to the surface followed by reaction with oxygen in air to form ZnO.",
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AU - Smith, David

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N2 - The oxidation of ZnTe surfaces, both in situ and ex situ, is studied by high-resolution electron microscopy. For in situ oxidation, the oxidation sequence involved amorphization of the ZnTe crystal as Te is removed by a non-thermal electron stimulated process, with subsequent formation of hexagonal ZnO by oxygen diffusion into the sample. In ex situ oxidation, the main phases present are crystals of ZnO and Te metal, which usually give rise to layered surface regions, in the sequence ZnTe/Te/ZnO, with the large crystals (up to 100 nm) of Te in an epitaxial relationship with the bulk ZnTe and the small ZnO crystals (5 nm) in random orientations. This process involves the diffusion of Zn from the bulk ZnTe to the surface followed by reaction with oxygen in air to form ZnO.

AB - The oxidation of ZnTe surfaces, both in situ and ex situ, is studied by high-resolution electron microscopy. For in situ oxidation, the oxidation sequence involved amorphization of the ZnTe crystal as Te is removed by a non-thermal electron stimulated process, with subsequent formation of hexagonal ZnO by oxygen diffusion into the sample. In ex situ oxidation, the main phases present are crystals of ZnO and Te metal, which usually give rise to layered surface regions, in the sequence ZnTe/Te/ZnO, with the large crystals (up to 100 nm) of Te in an epitaxial relationship with the bulk ZnTe and the small ZnO crystals (5 nm) in random orientations. This process involves the diffusion of Zn from the bulk ZnTe to the surface followed by reaction with oxygen in air to form ZnO.

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