Sulfidation of Cadmium at the Nanoscale Metadata

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Title

  • Main Title Sulfidation of Cadmium at the Nanoscale

Creator

  • Author: Cabot, Andreu
    Creator Type: Personal
  • Author: Smith, Rachel
    Creator Type: Personal
  • Author: Yin, Yadong
    Creator Type: Personal
  • Author: Zheng, Haimei
    Creator Type: Personal
  • Author: Reinhard, Bjorn
    Creator Type: Personal
  • Author: Liu, Haitao
    Creator Type: Personal
  • Author: Alivisatos, A. Paul
    Creator Type: Personal

Contributor

  • Sponsor: Lawrence Berkeley Laboratory. Materials and Molecular Research Division.
    Contributor Type: Organization
    Contributor Info: Materials Sciences Division

Publisher

  • Name: Lawrence Berkeley National Laboratory
    Place of Publication: Berkeley, California
    Additional Info: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States)

Date

  • Creation: 2008-05-22

Language

  • English

Description

  • Content Description: We investigate the evolution of structures that result when spherical Cd nanoparticles of a few hundred nanometers in diameter react with dissolved molecular sulfur species in solution to form hollow CdS. Over a wide range of temperatures and concentrations, we find that rapid Cd diffusion through the growing CdS shell localizes the reaction front at the outermost CdS/S interface, leading to hollow particles when all the Cd is consumed. When we examine partially reacted particles, we find that this system differs significantly from others in which the nanoscale Kirkendall effect has been used to create hollow particles. In previously reported systems, partial reaction creates a hollow particle with a spherically symmetric metal core connected to the outer shell by filaments. In contrast, here we obtain a lower symmetry structure, in which the unreacted metal core and the coalesced vacancies separate into two distinct spherical caps, minimizing the metal/void interface. This pattern of void coalescence is likely to occur in situations where the metal/vacancy self-diffusivities in the core are greater than the diffusivity of the cations through the shell.
  • Physical Description: 24

Subject

  • Keyword: Vacancies Hollow Nanoparticle, Kirkendall Effect, Self-Diffusion, Diffusion Mechanism, Cds, Sulfidation
  • Keyword: Diffusion
  • Keyword: Symmetry
  • Keyword: Sulfidation
  • STI Subject Categories: 37
  • STI Subject Categories: 36
  • Keyword: Coalescence
  • Keyword: Kirkendall Effect
  • STI Subject Categories: 77
  • Keyword: Hollow Nanoparticle, Kirkendall Effect, Self-Diffusion, Diffusion Mechanism, Cds, Sulfidation
  • Keyword: Sulfur
  • Keyword: Cations
  • Keyword: Cadmium

Source

  • Journal Name: ACS Nano; Journal Volume: 2; Journal Issue: 7; Related Information: Journal Publication Date: 2008

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Report No.: LBNL-994E
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 937492
  • Archival Resource Key: ark:/67531/metadc900701
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