In situ generation of silver microstructures by thermal decomposition of silver n-dodecanethiolate dispersed in an organic¨Cinorganic hybrid coating

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• 作者：Marí ; a L. Gó ; mez ; Cristina E. Hoppe ; Roberto J.J. Williams  ; ;   ; ^{williams@fi.mdp.edu.ar}
• 关键词：Coatings ; Heat treatment ; Microstructures ; Nanocomposites
• 刊名：Materials Chemistry and Physics
• 出版年：2011
• 出版时间：17 October 2011
• 年：2011
• 卷：130
• 期：1-2
• 页码：519-523
• 全文大小：1180 K

文摘

Although it is known that metallic silver can be produced by the thermal decomposition of silver n-dodecanethiolate (Ag-DDT), the use of this reaction to synthesize silver-modified coatings is difficult due to the insolubility of Ag-DDT in most solvents and coating precursors. We report that lamellar Ag-DDT crystals can be uniformly dispersed in an organic¨Cinorganic hybrid coating based on a bridged silsesquioxane containing pendant dodecyl chains. Heating the dispersion for 4 h at 423 K (above the melting point of the Ag-DDT crystals) produced the transformation of the lamellar phase into a metastable crystalline phase together with a spiral-like microstructuration of the whole material. When the heating was continued for 24 h, the metastable crystalline phase led to metallic silver microstructures uniformly dispersed in the silsesquioxane matrix.