Fuchs, Marco and Abidin, Zaenal and Kuebel, Christian and Weidler, Peter G. and Matsue, Naoto and Henmi, Teruo and Koester, Rainer and Gliemann, Hartmut (2012) PATTERNED DEPOSITION OF ALLOPHANE NANOPARTICLES ON SILICON SUBSTRATES. CLAYS AND CLAY MINERALS, 60 (5). pp. 456-463. ISSN 0009-8604, 1552-8367
Full text not available from this repository. (Request a copy)Abstract
In order to obtain nanopatterned surfaces, natural allophane particles originating from Japanese soils were immobilized as single particles on Si wafer substrates. When derived from aqueous suspensions, only a few nanoparticles were deposited and detected on the surface due to the weak adsorption of allophanes on the substrate. The amount of immobilized allophane was increased significantly, however, by using an organic solvent in combination with a micelle-based technique to suspend the allophane particles. The micelles were formed from a tailored, aliphatic diblock copolymer that was dissolved in toluene and contained several allophane particles. A cleaned silica chip was used as a substrate on which a monolayer of micelles was immobilized equidistant from each other by dip coating. To remove the polymer from the substrate and to produce free, single allophane nanoparticles, ultraviolet (UV) irradiation was used. After UV treatment, single allophane particles formed ring-shaped deposition patterns with a high surface density. Transmission electron microscopy (TEM) was used to verify the presence of single allophane nanoparticles in the Japanese samples which came from natural sources. The single allophane particles as well as the allophane-containing di-block copolymer micelles, both immobilized on Si substrates and TEM sample grids, were imaged by atomic force microscopy and TEM. In this way, the diameters of the single allophane particles, as well as the distances between the immobilized micelles and the particles and their topography on the substrates, were determined.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ORDERED ARRAYS; POLY(STYRENE-B-2-VINYLPYRIDINE); DYNAMICS; AFM; Allophane; Diblock Copolymer; Micelle; Nanoparticle; Nanostructuring |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 05 May 2020 07:21 |
| Last Modified: | 05 May 2020 07:21 |
| URI: | https://pred.uni-regensburg.de/id/eprint/17966 |
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