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  1. Book ; Thesis: Atmosphärendruck-Plasma-Beschichtungsreaktoren

    Mäder, Gerrit

    2008  

    Author's details von Gerrit Mäder
    Keywords Geräteentwicklung ; PECVD-Verfahren ; Luftdruck ; Chemischer Reaktor
    Language German
    Size 146 S., Ill., graph. Darst.
    Publisher Fraunhofer-IRB-Verl
    Publishing place Stuttgart
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Techn. Univ., Diss.--Dresden, 2008
    ISBN 9783816776567 ; 3816776566
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  2. Article ; Online: Spatiotemporal Design of the Metal-Organic Framework DUT-8(M).

    Miura, Hiroki / Bon, Volodymyr / Senkovska, Irena / Ehrling, Sebastian / Bönisch, Nadine / Mäder, Gerrit / Grünzner, Stefan / Khadiev, Azat / Novikov, Dmitri / Maity, Kartik / Richter, Andreas / Kaskel, Stefan

    Advanced materials (Deerfield Beach, Fla.)

    2022  Volume 35, Issue 8, Page(s) e2207741

    Abstract: Switchable metal-organic frameworks (MOFs) change their structure in time and selectively open their pores adsorbing guest molecules, leading to highly selective separation, pressure amplification, sensing, and actuation applications. The 3D engineering ... ...

    Abstract Switchable metal-organic frameworks (MOFs) change their structure in time and selectively open their pores adsorbing guest molecules, leading to highly selective separation, pressure amplification, sensing, and actuation applications. The 3D engineering of MOFs has reached a high level of maturity, but spatiotemporal evolution opens a new perspective toward engineering materials in the 4th dimension (time) by t-axis design, in essence exploiting the deliberate tuning of activation barriers. This work demonstrates the first example in which an explicit temporal engineering of a switchable MOF (DUT-8, [M
    Language English
    Publishing date 2022-12-27
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1474949-X
    ISSN 1521-4095 ; 0935-9648
    ISSN (online) 1521-4095
    ISSN 0935-9648
    DOI 10.1002/adma.202207741
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Conference proceedings ; Online: Influence of microwave plasma treatment on the surface properties of carbon fibers and their adhesion in a polypropylene matrix

    Scheffler, Christina / Wölfel, Enrico / Förster, Theresa / Poitzsch, C. / Kotte, Liliana / Mäder, Gerrit

    2016  

    Abstract: Art. 012046, 9 S. ... A commercially available carbon fiber (CF) with an epoxy-based sizing (EP-sized CF) and an unsized CF have been plasma treated to study the effect on the fiber-matrix adhesion towards a polypropylene matrix. The EP-sized fiber was ... ...

    Abstract Art. 012046, 9 S.

    A commercially available carbon fiber (CF) with an epoxy-based sizing (EP-sized CF) and an unsized CF have been plasma treated to study the effect on the fiber-matrix adhesion towards a polypropylene matrix. The EP-sized fiber was chosen because of its predictable low adhesion in a polypropylene (PP) matrix. The fibers have been modified using a microwave low-pressure O 2/CO 2/N 2-gas plasma source (Cyrannusreg) developed at IWS in a batch process. One aim of this study was the evaluation of parameters using high energies and short time periods in the plasma chamber to see the effect on mechanical performance of CF. These results will be the fundamental work for a planned continuous plasma modification line. The CF surface was characterized by determining the surface energies, single fiber tensile strength and XPS analysis. The adhesion behavior before and after plasma treatment was studied by single fiber pull-out test (SFPO) and scanning electron microscopy (SEM). It was shown that the CO 2- and O 2-plasma increases the number of functional groups on the fiber surface during short time plasma treatment of 30 s. Carboxylic groups on the unsized CF surface resulting from O 2-plasma treatment lead to an enhanced fiber-matrix adhesion, whereas the fiber strength was merely reduced.
    Keywords adhesion ; carbon fibres ; 621 ; 671
    Subject code 660
    Language English
    Publishing country de
    Document type Conference proceedings ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Formation of SiC nanoparticles in an atmospheric microwave plasma.

    Vennekamp, Martin / Bauer, Ingolf / Groh, Matthias / Sperling, Evgeni / Ueberlein, Susanne / Myndyk, Maksym / Mäder, Gerrit / Kaskel, Stefan

    Beilstein journal of nanotechnology

    2011  Volume 2, Page(s) 665–673

    Abstract: We describe the formation of SiC nanopowder using an atmospheric argon microwave plasma with tetramethylsilane (TMS) as precursor. The impact of several process conditions on the particle size of the product is experimentally investigated. Particles with ...

    Abstract We describe the formation of SiC nanopowder using an atmospheric argon microwave plasma with tetramethylsilane (TMS) as precursor. The impact of several process conditions on the particle size of the product is experimentally investigated. Particles with sizes ranging from 7 nm to about 20 nm according to BET and XRD measurements are produced. The dependency of the particle size on the process parameters is evaluated statistically and explained with growth-rate equations derived from the theory of Ostwald ripening. The results show that the particle size is mainly influenced by the concentration of the precursor material in the plasma.
    Language English
    Publishing date 2011-10-07
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2583584-1
    ISSN 2190-4286 ; 2190-4286
    ISSN (online) 2190-4286
    ISSN 2190-4286
    DOI 10.3762/bjnano.2.71
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Book ; Article ; Online: Großflächige Plasmavorbehandlung und PECVD bei Atmosphärendruck mittels LARGE-Plasmaquelle ; Large-area plasma pretreatment and atmospheric-pressure PECVD using the LARGE plasma source

    Kotte, Liliana / Mäder, Gerrit / Roch, Julius / Leupolt, Beate / Kaskel, Stefan / Wielant, Jan / Mertens, Tobias / Gammel, Franz J.

    2012  

    Abstract: S.49-60 ... Using the LARGE (Long Arc Generator) plasma source, a long arc, forming a fan-shaped afterglow plasma with a width of 80 to 350 mm is formed at atm. pressure. In contrast to most point-form atm. plasma sources, the method offers an attractive ... ...

    Abstract S.49-60

    Using the LARGE (Long Arc Generator) plasma source, a long arc, forming a fan-shaped afterglow plasma with a width of 80 to 350 mm is formed at atm. pressure. In contrast to most point-form atm. plasma sources, the method offers an attractive means for pre-treatment of large surface areas. The reactive working gas formed by plasmachem. excitation can be used to activate or modify the surfaces of materials ranging from metals to polymers. In this article, the operation of the LARGE plasma source, the means by which coating properties can be modified and its use to deposit SiOx adhesion-promoting layers on metals are described. Of special interest were the optical properties and the morphol. of these deposits as well as their potential as adhesion-promoters in metal-plastic composite structures. Because of its very flexible stand-off distance of up to 60 mm and its compact construction, LARGE technol. is ideal for a wide range of industrial applications. These include coating of 2.5 D components, and formation of nano-structured SiOx layers for mech. and chem. bonding of epoxy adhesives to surfaces.
    Keywords 621 ; 671
    Subject code 660
    Language German
    Publishing country de
    Document type Book ; Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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