Layer-by-layer self assembly deposition and characterization of TiO2 nanoparticles by using a short chain polycation
作者： M. Rahman , N. Taghavinia
关键词: Polyethylenimine 、 Chemical engineering 、 Nanotechnology 、 Adsorption 、 Thin film 、 Solar cell 、 Nanoparticle 、 Chemistry 、 Self-assembly 、 Polyelectrolyte 、 Scanning electron microscope
摘要: Using low molecular weight polyethylenimine (PEI), transparent thin films of TiO 2 nanoparticles were prepared by layer-by-layer self assembly method. UV-visible spectrophotometry was employed in a quantitative manner to monitor the adsorbed mass and PEI after each dip cycle. The adsorption both showed saturation time 10 min. effect on growth mode surface morphology investigated scanning electron microscopy (SEM) non-contact atomic force (AFM). It found that proceeds form laterally broad islands case short times, taller but smaller longer times. A model proposed which describes role lateral islands. Low resulted around 25% less comparison with high PEI, because lower remaining ash, could be promising for dye-sensitized solar cell photoelectrode applications, removal polyelectrolyte formation film enhances electrical properties therefore efficiency cell.
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