Synthesis and optical properties of MoS{sub 2} nanoclusters

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Description

Highly crystalline nanoclusters of MoS{sub 2} were synthesized and their optical absorption and photoluminescence spectra were investigated. Key results include: (1) strong quantum confinement effects with decreasing size; (2) preservation of the quasiparticle (or excitonic) nature of the optical response for clusters down to {approximately} 2.5 nm in size which are only two unit cells thick; (3) demonstration that 3-D confinement produces energy shifts which are over an order of magnitude larger than those due to 1-D confinement; (4) observation of large increases in the spin-orbit splittings at the top of the valence band at the K and M points ... continued below

Physical Description

13 p.

Creation Information

Wilcoxon, J.P.; Newcomer, P.P. & Samara, G.A. December 1, 1996.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Highly crystalline nanoclusters of MoS{sub 2} were synthesized and their optical absorption and photoluminescence spectra were investigated. Key results include: (1) strong quantum confinement effects with decreasing size; (2) preservation of the quasiparticle (or excitonic) nature of the optical response for clusters down to {approximately} 2.5 nm in size which are only two unit cells thick; (3) demonstration that 3-D confinement produces energy shifts which are over an order of magnitude larger than those due to 1-D confinement; (4) observation of large increases in the spin-orbit splittings at the top of the valence band at the K and M points of the Brillouin zone with decreasing cluster size; and (5) observation of photoluminescence due to both direct and surface recombination. Application is to photocatalysts for solar fuel production and detoxification of chemical waste.

Physical Description

13 p.

Notes

OSTI as DE97001232

Source

  • 1996 Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 2-6 Dec 1996

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  • Other: DE97001232
  • Report No.: SAND--96-2860C
  • Report No.: CONF-961202--7
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/414320 | External Link
  • Office of Scientific & Technical Information Report Number: 414320
  • Archival Resource Key: ark:/67531/metadc677668

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • December 1, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • April 14, 2016, 8:50 p.m.

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Wilcoxon, J.P.; Newcomer, P.P. & Samara, G.A. Synthesis and optical properties of MoS{sub 2} nanoclusters, report, December 1, 1996; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc677668/: accessed April 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.