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From (Cd2Se2)(pa) (pa=propylamine) hybrid precursors to various CdSe nanostructures: structural evolution and optical properties.

Authors
Type
Published Article
Journal
Dalton Transactions
1477-9234
Publisher
The Royal Society of Chemistry
Publication Date
Volume
40
Issue
13
Pages
3191–3197
Identifiers
DOI: 10.1039/c0dt01351j
PMID: 21340065
Source
Medline
License
Unknown

Abstract

Nanostructural evolution of II-VI semiconductors emerges as a hot research field because it offers a novel route for the synthesis of functional semiconductor nanomaterials. Here, we report a "top-down" process of structural evolution from two dimensional Cd(2)Se(2)(pa) hybrid structures to zero- or one- dimensional CdSe nanostructures. We firstly synthesized the Cd(2)Se(2)(pa) hybrid by a facile solvothermal reaction and determined the hybrid crystal structure through the Rietveld refinement based on the PXRD data. The (Cd(2)Se(2))(pa) hybrid consists of [Cd(2)Se(2)] slabs sandwiched by coordinated n-propylamine layers. Then, we used this hybrid as a precursor to explore the "top-down" fabrication process of structural evolution from two dimensional layered structures to zero- or one- dimensional nanocrystals. It has been shown that various CdSe nanostructures including lamellar structures, nanoparticles, nanowires, and nanorods can be obtained through the pyrolysis of (Cd(2)Se(2))(pa) hybrid precursor under different conditions. It is worth mentioning that the oriented attachment of nanoparticles has been observed during the pyrolysis process. Additionally, the variation of optical properties with structural evolution has been investigated in detail.

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