| Autor: |
Cumberland, S. L., Berrettini, M. G., Javier, A., Strouse, G. F. |
| Zdroj: |
Chemistry of Materials; March 2003, Vol. 15 Issue: 5 p1047-1056, 10p |
| Abstrakt: |
Development of synthetic strategies that allow the formation of controlled 3-dimensional architectures composed of discrete ensembles of nanoparticles is a challenging goal. We present a synthetic strategy that allows the preparation of a macroscopic 3-D metal−semiconductor assemblage composed of 6.0-nm Au and 6.0-nm CdSe nanoparticles cross-linked by a bifunctional organic spacer. Optical absorption and electron microscopy imaging, coupled to electron diffraction and energy-dispersive X-ray analysis, indicate a 1:6 Au−CdSe composite that appears to be uniform over a micrometer scale. The 1:6 structure is believed to be a close-packed structure which arises from a combination of soft-sphere packing forces due to van der Waals and steric forces, and thermodynamic forces due to an acid/base controlled selective interaction of the organic headgroup moieties with the nanoparticle surfaces. |
| Databáze: |
Supplemental Index |
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