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Directed coassembly of oriented PbS nanoparticles and monocrystalline sheets of alkylamine surfactant
Alexander Rabkin1, Nataly Belman, Jacob Israelachvili
1Department of Materials Engineering and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.
Abstract:
We demonstrate control over the orientation of PbS nanoparticles by way of directed assembly, which in turn affects the crystal structure of alkylamine surfactants such as octadecylamine (ODA, C(18)H(37)NH(2)) and hexadecylamine (HDA, C(16)H(33)NH(2)). This directed assembly method results in the arrangement of PbS nanoparticles with a well-defined epitaxial orientation on lamellar alkylamine sheets, which undertake a new crystal structure to accommodate these relations. Understanding these surfactant-nanoparticle inter-relations is very instrumental in understanding surfactant-assisted nanoparticle synthesis and assembly.
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