Two-dimensional self-assembly of 1-pyrylphosphonic acid: transfer of stacks on structured surface

Journal of the American Chemical Society
Hin-Lap YipBabak A Parviz

Abstract

Strong hydrogen bonding and pi-pi stacking between 1-pyrylphosphonic acid (PYPA) molecules were exploited to create self-assembled two-dimensional supramolecular structures. Polycrystalline films of these laminate crystalline PYPA bilayers were easily deposited onto the solid supports through a simple spin-coating technique. Atomic force microscopy (AFM), scanning tunneling microscopy (STM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV-vis absorption, and fluorescence spectroscopy reveal that processing parameters, such as solvent, concentration, and surface of the substrate, are critical factors in determining the final morphology of the stacked film. Robust laminate structures could be obtained only when short alkyl chain protic solvents (methanol or ethanol) and a nonhydrophobic substrate surface were used. Polycrystalline films were formed through the nucleation and growth of PYPA molecules into laminate structures at the air/solvent interface before they land on the substrate during the spin-coating process. These films possess good mechanical properties and were easily transferred onto a SiO2/Si substrate that was patterned with Au electrodes without breaking their crystalline structures. Th...Continue Reading

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Citations

Feb 7, 2014·Angewandte Chemie·Hayden T Black, Dmitrii F Perepichka
Jul 10, 2013·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Chunyang HeXinliang Feng
Sep 30, 2014·Faraday Discussions·Hayden T BlackDmitrii F Perepichka
Dec 17, 2009·Nano Letters·Alejandro L BrisenoPeidong Yang
Jan 9, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Kuan-Hsin LoChain-Shu Hsu

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