The structure and morphology of semiconductor nanocrystals

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Colloidal semiconductor nanocrystals were studied using High Resolution Transmission Electron Microscopy (HRTEM). Organically capped nanocrystals were found to have faceted shapes consistent with Wulff polyhedra after the effects of capping ligands on surface energies were taken into account. The basic shape thus derived for wurtzite (WZ) structure CdSe nanocrystals capped by tri-octyl phosphine oxide (TOPO) was a truncated hexagonal prism, elongated alone the <001> axis with (100) and (002) facets. This structure has C{sub 3v} point group symmetry. The main defect in this structure is a stacking fault (a single layer of zinc blende type stacking), which does not significantly ... continued below

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163 p.

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Kadavanich, A.V. November 1, 1997.

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  • Kadavanich, A.V. Univ. of California, Berkeley, CA (United States). Dept. of Chemistry

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Description

Colloidal semiconductor nanocrystals were studied using High Resolution Transmission Electron Microscopy (HRTEM). Organically capped nanocrystals were found to have faceted shapes consistent with Wulff polyhedra after the effects of capping ligands on surface energies were taken into account. The basic shape thus derived for wurtzite (WZ) structure CdSe nanocrystals capped by tri-octyl phosphine oxide (TOPO) was a truncated hexagonal prism, elongated alone the <001> axis with (100) and (002) facets. This structure has C{sub 3v} point group symmetry. The main defect in this structure is a stacking fault (a single layer of zinc blende type stacking), which does not significantly affect the shape (does not alter the point group).

Physical Description

163 p.

Notes

OSTI as DE98052649

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  • Other Information: TH: Thesis (Ph.D.)

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  • Other: DE98052649
  • Report No.: LBNL--41116
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 588578
  • Archival Resource Key: ark:/67531/metadc698683

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  • November 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Aug. 23, 2016, 3:22 p.m.

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Kadavanich, A.V. The structure and morphology of semiconductor nanocrystals, thesis or dissertation, November 1, 1997; California. (digital.library.unt.edu/ark:/67531/metadc698683/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.