Morphological investigation of hybrid Langmuir-Blodgett films of arachidic acid with a hydrotalcite/dendrimer nanocomposite.
Morphological investigation of hybrid Langmuir-Blodgett films of arachidic acid with a hydrotalcite/dendrimer nanocomposite.
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DOI：
10.1021/la049088a
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发表时间：
2004-08
期刊：
影响因子：
--
通讯作者：
A. Costa;T. Imae
中科院分区：
文献类型：
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作者：
A. Costa;T. Imae
通过离子交换法制备水滑石粘土/树枝状聚合物纳米复合材料，将纳米复合材料的悬浮液吸附在空气/水界面的朗缪尔单层花生酸上，然后压缩并转移到云母上的单层花生酸朗缪尔-布洛杰特（LB）薄膜上。为了进行比较，还制备了吸附水滑石的杂化膜。通过透射电子显微镜研究的水滑石和纳米复合材料的形貌表明重复距离分别为1.2+/-0.3和3.2+/-0.5nm的层状结构。杂化 Langmuir 薄膜显示水滑石和纳米复合材料的占据表面积均为 0.24 nm2。布鲁斯特角显微镜证实了杂化朗缪尔薄膜的形成。杂化LB薄膜的原子力显微图像揭示了水滑石高度差为6 nm、纳米复合材料高度差为12 nm的平台域的形成，以及吸附在纳米复合材料粘土表面上的树枝状聚合物的存在。
A hydrotalcite clay/dendrimer nanocomposite prepared by the ionic exchange process was adsorbed from suspension of the nanocomposite on a Langmuir monolayer of arachidic acid at the air/water interface, followed by compressing and transferring onto an arachidic acid monolayer Langmuir-Blodgett (LB) film on mica. For comparison, the hydrotalcite-adsorbed hybrid film was also prepared. The morphology of hydrotalcite and the nanocomposite studied by transmission electron microscopy indicated the layered structures with respectively 1.2 +/- 0.3 and 3.2 +/- 0.5 nm repeating distances. The hybrid Langmuir films displayed the occupied surface area of 0.24 nm2 for both hydrotalcite and the nanocomposite. The formation of hybrid Langmuir films was confirmed by Brewster angle microscopy. Atomic force microscopic images of hybrid LB films revealed the formation of plateau domains with the height difference of 6 nm for hydrotalcite and 12 nm for the nanocomposite and the presence of dendrimers adsorbed on the clay surface of the nanocomposite.