High-surface-area mesoporous germanium from oxidative polymerization of the deltahedral [Ge9]4- cluster

Electronic structure modulation with donor and acceptor molecules

Gerasimos S. Armatas, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

A study has reported an advanced route to hexagonal mesoporous germanium through the slow oxidative polymerization of the deltahedral (Ge 9)4- clusters. This route does not require an external oxidant nor linking agent and occurs in the presence of the cationic surfactant N-eicosane-N,N-dimethyl-N-(2-hydroxethyl)ammonium bromide (EDMHEAB) as a structure-directing agent. A novel form of mesoporous germanium (NU-Ge-1) can be stabilized, which possesses a large surface area and can readily absorb organic aromatic species. The study also demonstrated that the pore surface of mesoporous Ge is sensitive towards adsorbates with electron-donor and -acceptor properties, exhibiting reversible changes in its electronic structure. The electronic structure of the Ge network can also be altered in a controllable manner by absorbing in its interior molecules with donor and acceptor properties that can engage in charge-transfer interactions with the inorganic framework.

Original languageEnglish
Pages (from-to)546-550
Number of pages5
JournalAdvanced Materials
Volume20
Issue number3
DOIs
Publication statusPublished - Feb 4 2008

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Germanium
Electronic structure
Polymerization
Modulation
Molecules
Cationic surfactants
Adsorbates
Oxidants
Charge transfer
Electrons
eicosane
ammonium bromide

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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