Phase behavior of organic-inorganic crystal |
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| Authors: | SJ Lee SW Han HJ Choi K Kim |
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| Institution: | (1) School of Chemistry and Molecular Engineering and Center for Molecular Catalysis, Seoul National University, Seoul 151-742, Korea, KR |
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| Abstract: | We have investigated the structure and phase behavior of nonmolecularly layered silver stearate by means of temperature-dependent
diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy. Upon heating the sample, remarkable spectral changes
took place. The first phase transition took place that might be associated with a premelting event characterized by the formation
of gauche conformers at 390-420 K. A second phase transition took place in which silver nanoparticles with a size of ∼4 nm
were formed by thermal decomposition of silver stearate at 520-550 K. These silver nanoparticles, derivatized by stearate,
were readily spread as a monolayer at air/water interface, and could be packed in 3-D assemblies by the Langmuir-Blodgett
method.
Received 29 November 2000 |
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| Keywords: | PACS 81 07 Pr Organic-inorganic hybrid nanostructures – 61 46 +w Nanoscale materials: clusters nanoparticles nanotubes and nanocrystals |
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