Morphological investigation of hybrid Langmuir-Blodgett films of arachidic acid with a hydrotalcite/dendrimer nanocomposite

Langmuir : the ACS Journal of Surfaces and Colloids
Alexsandro Santos Costa, Toyoko Imae

Abstract

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.

Citations

Jul 9, 2013·Journal of Colloid and Interface Science·Kinjal J ShahDinesh O Shah
Apr 2, 2016·Biomacromolecules·Kinjal J Shah, Toyoko Imae
Jan 1, 2012·ISRN Organic Chemistry·Rocío RedónF J Mendoza-Martínez
Feb 16, 2007·Physical Chemistry Chemical Physics : PCCP·Robin H A RasRobert A Schoonheydt
Aug 30, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Ignaty LeshchinerValery P Shibaev

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