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rdf:type
lifeskim:mentions
pubmed:issue
41
pubmed:dateCreated
2002-10-9
pubmed:abstractText
If the full scientific and technological potential of mesostructured materials is to be achieved, systems with continuous domains in the form of single crystals or films must be prepared. Here we report a reliable and facile system for making large single-crystal particles of chalcogenido mesostructured materials with a highly organized cubic structure, accessible pore structure, and semiconducting properties. Building blocks with square planar bonding topology, Pt(2+) and [Sn(2)Se(6)](4)(-), in combination with long-chain pyridinium surfactants (C(n)PyBr, n = 18, 20) favor faceted single-crystal particles with the highest possible space group symmetry Ia3d. This is an important step toward developing large single-domain crystalline mesostructured semiconductors and usable natural self-assembled antidot array systems. The tendency toward cubic symmetry is so strong that the materials assemble readily under experimental conditions that can tolerate considerable variation and form micrometer-sized rhombic dodecahedral cubosome particles. The c-C(n)PyPtSnSe materials are the first to exhibit reversible ion-exchange properties. The surfactant molecules can be ion-exchanged reversibly and without loss of the cubic structure and particle morphology. The cubosomes possess a three-dimensional open Pt-Sn-Se framework with a low-energy band gap of approximately 1.7 eV.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Oct
pubmed:issn
0002-7863
pubmed:author
pubmed:issnType
Print
pubmed:day
16
pubmed:volume
124
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
12255-60
pubmed:dateRevised
2003-11-3
pubmed:year
2002
pubmed:articleTitle
Single-crystal mesostructured semiconductors with cubic Ia3d symmetry and ion-exchange properties.
pubmed:affiliation
Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA.
pubmed:publicationType
Journal Article