Patterning of Magnetic Bimetallic Coordination Nanoparticles of Prussian Blue Derivatives by the Langmuir–Blodgett Technique
| Autor: | Angel López-Muñoz, Miguel Clemente-León, Laure Catala, Eugenio Coronado, Diego Repetto, Talal Mallah |
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| Rok vydání: | 2012 |
| Předmět: |
Prussian blue
Aqueous solution Brewster's angle Materials science Nanoparticle 02 engineering and technology Surfaces and Interfaces 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Langmuir–Blodgett film 0104 chemical sciences Crystallography chemistry.chemical_compound symbols.namesake Adsorption chemistry Monolayer Electrochemistry symbols General Materials Science 0210 nano-technology Bimetallic strip Spectroscopy |
| Zdroj: | Langmuir |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/la2049508 |
| Popis: | We report a novel method to prepare patterns of nanoparticles over large areas of the substrate. This method is based on the adsorption of the negatively charged nanoparticles dispersed in an aqueous subphase onto a monolayer of the phospholipid dipalmitoyl-l-α-phosphatidylcholine (DPPC) at the air-water interface. It has been used to prepare patterns of nanoparticles of Prussian blue analogues (PBA) of different size (K(0.25)Ni[Fe(CN)(6)](0.75) (NiFe), K(0.25)Ni[Cr(CN)(6)](0.75) (NiCr), K(0.25)Ni[Co(CN)(6)](0.75) (NiCo), Cs(0.4)Co[Cr(CN)(6)](0.8) (CsCoCr), and Cs(0.4)Co[Fe(CN)(6)](0.9) (CsCoFe)). The behavior of DPPC monolayer at the air-water interface in the presence of the subphase of PBA nanoparticles has been studied by the compression isotherms and Brewster angle microscopy (BAM) images. Atomic force microscopy (AFM) of the transferred films on mica substrates shows that patterns of the nanoparticles are observed for a 10(-4) M concentration of the subphase, based on the nanoparticle precursors, at surface pressures between 1 and 6 mN/m and transfer velocities from 10 to 80 mm/min. Vertical, horizontal, or tilted fringes of the nanoparticles with respect to the transfer direction can be obtained depending on the transfer velocity and surface pressure. |
| Databáze: | OpenAIRE |
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