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Die Bildung von Nanopartikeln und Nanostrukturen - CaCO3, Zement und Polymere aus Sicht der Industrie

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Angewandte Chemie

Wiley-Blackwell

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      Kinetische Behandlung der Keimbildung in übersättigten Dämpfen

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        Tough, bio-inspired hybrid materials.

         D Alsem,  E. Saiz,  E Münch (2008)
        The notion of mimicking natural structures in the synthesis of new structural materials has generated enormous interest but has yielded few practical advances. Natural composites achieve strength and toughness through complex hierarchical designs that are extremely difficult to replicate synthetically. We emulate nature's toughening mechanisms by combining two ordinary compounds, aluminum oxide and polymethyl methacrylate, into ice-templated structures whose toughness can be more than 300 times (in energy terms) that of their constituents. The final product is a bulk hybrid ceramic-based material whose high yield strength and fracture toughness [ approximately 200 megapascals (MPa) and approximately 30 MPa.m(1/2)] represent specific properties comparable to those of aluminum alloys. These model materials can be used to identify the key microstructural features that should guide the synthesis of bio-inspired ceramic-based composites with unique strength and toughness.
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          Molecular biomimetics: nanotechnology through biology.

          Proteins, through their unique and specific interactions with other macromolecules and inorganics, control structures and functions of all biological hard and soft tissues in organisms. Molecular biomimetics is an emerging field in which hybrid technologies are developed by using the tools of molecular biology and nanotechnology. Taking lessons from biology, polypeptides can now be genetically engineered to specifically bind to selected inorganic compounds for applications in nano- and biotechnology. This review discusses combinatorial biological protocols, that is, bacterial cell surface and phage-display technologies, in the selection of short sequences that have affinity to (noble) metals, semiconducting oxides and other technological compounds. These genetically engineered proteins for inorganics (GEPIs) can be used in the assembly of functional nanostructures. Based on the three fundamental principles of molecular recognition, self-assembly and DNA manipulation, we highlight successful uses of GEPI in nanotechnology.
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            Author and article information

            Journal
            Angewandte Chemie
            Angew. Chem.
            Wiley-Blackwell
            00448249
            November 10 2014
            November 10 2014
            : 126
            : 46
            : 12586-12603
            10.1002/ange.201402890
            © 2014

            http://doi.wiley.com/10.1002/tdm_license_1.1

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