Surface stoichiometry of CdSe nanocrystals

Jason Taylor, Tadd Kippeny, Jonathan C. Bennett, Mengbing Huang, Leonard C Feldman, Sandra J. Rosenthal

Research output: Chapter in Book/Report/Conference proceedingChapter

8 Citations (Scopus)

Abstract

Rutherford backscattering spectroscopy (RBS) has been applied to determine the constitution of prototypical CdSe nanocrystals synthesized by the high temperature pyrolysis of organometallics in trioctylphosphine oxide (TOPO). The diameter of the nanocrystals was varied from 22 A to 58 angstrom. For all nanocrystal sizes the nanocrystals are Cd rich with an average Cd:Se ratio of 1.2 ± 0.1. The Cd:Se stoichiometery is independent of the starting Cd:Se ratio used for nanocrystal preparation, indicating the excess Cd is not associated with the initial abundance but is an intrinsic property of nanocrystals prepared by this method. The size dependence of excess Cd indicates the extra Cd is on the surface of the crystalline. The coverage of the surface passivating TOPO ligands has also been determined and is larger than reported in previous X-ray photoelectron spectroscopy (XPS) studies of Bowen Katari et al. The origin and structural implications of non-stoichoimetric Cd are discussed.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium - Proceedings
PublisherMaterials Research Society
Pages413-418
Number of pages6
Volume536
Publication statusPublished - 1999
EventProceedings of the 1998 MRS Fall Meeting - The Symposium 'Advanced Catalytic Materials-1998' - Boston, MA, USA
Duration: Nov 30 1998Dec 3 1998

Other

OtherProceedings of the 1998 MRS Fall Meeting - The Symposium 'Advanced Catalytic Materials-1998'
CityBoston, MA, USA
Period11/30/9812/3/98

Fingerprint

Stoichiometry
Nanocrystals
Oxides
Rutherford backscattering spectroscopy
Organometallics
Pyrolysis
X ray photoelectron spectroscopy
Ligands
Crystalline materials
Temperature
trioctyl phosphine oxide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Taylor, J., Kippeny, T., Bennett, J. C., Huang, M., Feldman, L. C., & Rosenthal, S. J. (1999). Surface stoichiometry of CdSe nanocrystals. In Materials Research Society Symposium - Proceedings (Vol. 536, pp. 413-418). Materials Research Society.

Surface stoichiometry of CdSe nanocrystals. / Taylor, Jason; Kippeny, Tadd; Bennett, Jonathan C.; Huang, Mengbing; Feldman, Leonard C; Rosenthal, Sandra J.

Materials Research Society Symposium - Proceedings. Vol. 536 Materials Research Society, 1999. p. 413-418.

Research output: Chapter in Book/Report/Conference proceedingChapter

Taylor, J, Kippeny, T, Bennett, JC, Huang, M, Feldman, LC & Rosenthal, SJ 1999, Surface stoichiometry of CdSe nanocrystals. in Materials Research Society Symposium - Proceedings. vol. 536, Materials Research Society, pp. 413-418, Proceedings of the 1998 MRS Fall Meeting - The Symposium 'Advanced Catalytic Materials-1998', Boston, MA, USA, 11/30/98.
Taylor J, Kippeny T, Bennett JC, Huang M, Feldman LC, Rosenthal SJ. Surface stoichiometry of CdSe nanocrystals. In Materials Research Society Symposium - Proceedings. Vol. 536. Materials Research Society. 1999. p. 413-418
Taylor, Jason ; Kippeny, Tadd ; Bennett, Jonathan C. ; Huang, Mengbing ; Feldman, Leonard C ; Rosenthal, Sandra J. / Surface stoichiometry of CdSe nanocrystals. Materials Research Society Symposium - Proceedings. Vol. 536 Materials Research Society, 1999. pp. 413-418
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