Promising Piezoelectric Properties of New ZnO@Octadecylamine Adduct

A supramolecular adduct formed by the interaction among octadecylamine (ODA) and zinc oxide nanostructures was promoted. A stable dispersion of the ZnO@ODA adduct was obtained and characterized by means of thermogravimetric analysis and infrared and Raman spectroscopy. Then, the supramolecular adduct was spread at the air/water interface of a Langmuir trough. The presence of octadecylamine gave amphiphilic features to the ZnO@ODA adduct that was transferred from the air/water interface to solid substrates by Langmuir–Schaefer (LS) method. The transferred film was characterized by tunnel electron microscopy that highlighted rectangular well-shaped structures assembled by nanostructure of ZnO arranged in an ODA matrix. Piezoelectric feature of large LS film (1 cm2) was tested and a very promising response was observed as a consequence of the application of a pressure of 1 kPa.

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