Nanoaggregates of Copper Porphyrazine in Floating Layers and Langmuir-Schaefer Films
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- 作者：Larissa A. Valkova ; Ludovico Valli ; Serena Casilli ; Gabriele Giancane ; Nicholas Yu. Borovkov ; Galina V. Sibrina ; Alexandr S. Glibin ; Oscar I. Koifman ; Michela Pisani ; Franco Rustichelli
- 刊名：Langmuir
- 出版年：2008
- 出版时间：May 6, 2008
- 年：2008
- 卷：24
- 期：9
- 页码：4857 - 4864
- 全文大小：377K
- 年卷期：v.24,no.9(May 6, 2008)
- ISSN：1520-5827
文摘
Aggregation behavior of unsubstituted copper porphyrazine (CuPaz) on the water surface was studied by analysisof compression curves, Brewster angle microscopy (BAM), and optical spectroscopy. The structure and stability ofthe CuPaz aqua aggregates in the floating layers are determined by hydration degree that depends on initial surfaceconcentration and surface pressure. Langmuir-Schaefer (LS) films of CuPaz were prepared by deposition of thevariously structured floating layers and studied by X-ray scattering technique and optical spectroscopy. Stable andlabile structures were detected and compared with the floating CuPaz aqua aggregates. Conditions of formation ofthe stable four-stacked nanoaggregates in LS films were determined. A model comprising both nucleation of CuPazon the water surface and structural transformations in the solid films is proposed.