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Akademický článek

Fiber diameter as design parameter for tailoring the macroscopic shape-memory performance of electrospun meshes

Autor: Tilman Sauter, Karl Kratz, Matthias Heuchel, Andreas Lendlein

Publikováno v: Materials & Design, Vol 202, Iss , Pp 109546- (2021)

Fibrous shape-memory polymer (SMP) scaffolds were investigated considering the fiber as basic microstructural feature. By reduction of the fiber diameter in randomly oriented electrospun polyetherurethane (PEU) meshes from the micro- to the nano-scal

Externí odkaz: https://doaj.org/article/905425fd109b4503ab8a689b1f20952d

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Akademický článek

Temperature-induced evolution of microstructures on poly[ethylene-co-(vinyl acetate)] substrates switches their underwater wettability

Autor: Yi Jiang, Ulrich Mansfeld, Liang Fang, Karl Kratz, Andreas Lendlein

Publikováno v: Materials & Design, Vol 163, Iss , Pp - (2019)

Material surfaces with tailored aerophobicity are crucial for applications where gas bubble wettability has to be controlled, e.g., gas storage and transport, electrodes, bioreactors or medical devices.Here, we present switchable underwater aerophobi

Externí odkaz: https://doaj.org/article/c0003733a67c4d489df337485473e0ca

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Akademický článek

An ellipsometric approach towards the description of inhomogeneous polymer-based Langmuir layers

Autor: Falko O. Rottke, Burkhard Schulz, Klaus Richau, Karl Kratz, Andreas Lendlein

Publikováno v: Beilstein Journal of Nanotechnology, Vol 7, Iss 1, Pp 1156-1165 (2016)

The applicability of nulling-based ellipsometric mapping as a complementary method next to Brewster angle microscopy (BAM) and imaging ellipsometry (IE) is presented for the characterization of ultrathin films at the air–water interface. First, the

Externí odkaz: https://doaj.org/article/cece8ac420024028ae7203e0cbbde2ae

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Origami hand for soft robotics driven by thermally controlled polymeric fiber actuators

Autor: Marc Behl, Andreas Lendlein, Muhammad Farhan, Karl Kratz

Publikováno v: MRS Communications
Farhan, M.; Behl, M.; Kratz, K.; Lendlein, A.: Origami hand for soft robotics driven by thermally controlled polymeric fiber actuators. In: MRS Communications. Vol. 11 (2021) 4, 476-482. (DOI: /10.1557/s43579-021-00058-4)

Active fibers can serve as artificial muscles in robotics or components of smart textiles. Here, we present an origami hand robot, where single fibers control the reversible movement of the fingers. A recovery/contracting force of 0.2 N with a work c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8bc377eb1a05dbaf5e04450fffd42e8
https://doi.org/10.1557/s43579-021-00058-4

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The influence of different rewetting procedures on the thrombogenicity of nanoporous poly(ether imide) microparticles

Autor: S. Braune, Karl Kratz, Andreas Lendlein, Matthias Heuchel, F. Jung, Markus Reinthaler, J. Bäckemo, S. Lau

Publikováno v: Braune, S.; Bäckemo, J.; Lau, S.; Heuchel, M.; Kratz, K.; Jung, F.; Reinthaler, M.; Lendlein, A.: The influence of different rewetting procedures on the thrombogenicity of nanoporous poly(ether imide) microparticles. In: Clinical Hemorheology and Microcirculation. Vol. 77 (2021) 4, 367-380. (DOI: /10.3233/CH-201029)

Nanoporous microparticles prepared from poly(ether imide) (PEI) are discussed as candidate adsorber materials for the removal of uremic toxins during apheresis. Polymers exhibiting such porosity can induce the formation of micro-gas/air pockets when

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8eb2ddbed09158d381b706f5d2d78c94
https://doi.org/10.3233/ch-201029

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Substrate-enzyme affinity-based surface modification strategy for endothelial cell-specific binding under shear stress

Autor: Ralf-Peter Franke, Karl Kratz, Ramakrishnan Ganesan, Friedrich Jung, Anne Krüger-Genge, Andreas Lendlein, Seahyoung Lee

Publikováno v: Lee, S.; Ganesan, R.; Krüger-Genge, A.; Kratz, K.; Franke, R.; Lendlein, A.; Jung, F.: Substrate-enzyme affinity-based surface modification strategy for endothelial cell-specific binding under shear stress. In: Clinical Hemorheology and Microcirculation. Vol. 75 (2020) 1, 85-98. (DOI: /10.3233/CH-190736)

Establishing an endothelial cell (EC) monolayer on top of the blood contacting surface of grafts is considered to be a promising approach for creating a hemocompatible surface. Here we utilized the high affinity interactions between the EC plasma mem

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::84ccc0759eef7941eafc5944e01d91a6
https://doi.org/10.3233/ch-190736

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Elasticity of fiber meshes from multiblock copolymers influences endothelial cell behavior

Autor: Xianlei Sun, Weiwei Wang, Nan Ma, Andreas Lendlein, Jie Zou, Wingtai Tung, Karl Kratz

Publikováno v: Clinical Hemorheology and Microcirculation. 74:405-415

BACKGROUND The behavior of endothelial cells is remarkably influenced by the physical and biochemical signals from their surrounding microenvironments. OBJECTIVE Here, the elasticity of fiber meshes was studied as a design parameter of substrates for

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::551b86d06c0ebaac82528c37632ffa56
https://doi.org/10.3233/ch-190696

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Thin hydrogel coatings formation catalyzed by immobilized enzyme horseradish peroxidase

Autor: Matthias Franzreb, Karl Kratz, Alexander Welle, Andreas Lendlein, Friedrich Jung, S. Braune, Christian Wischke, Liudmila Lysyakova, Marlin Kersting

Publikováno v: Wischke, C.; Kersting, M.; Welle, A.; Lysyakova, L.; Braune, S.; Kratz, K.; Jung, F.; Franzreb, M.; Lendlein, A.: Thin hydrogel coatings formation catalyzed by immobilized enzyme horseradish peroxidase. In: MRS Advances . Vol. 5 (2020) 14-15, 773-783. (DOI: /10.1557/adv.2020.218)
MRS advances, 5 (14-15), 773–783

Enzymes can be a renewable source of catalytic agents and thus be interesting for sustainable approaches to create and modify functional materials. Here, thin hydrogel layers were prepared as thin coatings on hard substrates by immobilized horseradis

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76a051c6f3f263259ad73718cd890a8f
https://doi.org/10.1557/adv.2020.218

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Predictive topography impact model for Electrical Discharge Machining (EDM) of metal surfaces

Autor: Andreas Lendlein, Karl Kratz, Matthias Heuchel, Markus Reinthaler, Johan Bäckemo

Publikováno v: Bäckemo, J.; Heuchel, M.; Reinthaler, M.; Kratz, K.; Lendlein, A.: Predictive topography impact model for Electrical Discharge Machining (EDM) of metal surfaces . In: MRS Advances . Vol. 5 (2020) 12-13, 621-632. (DOI: /10.1557/adv.2019.433)

Electrical discharge machining (EDM) is a method capable of modifying the microstructure of metal surfaces. Here, we present a predictive computer supported model of the roughness generated on the surface by this process. EDM is a stochastic process,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e425ff42b02236f7dd06d970f5cacd4c
https://doi.org/10.1557/adv.2019.433

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Fine-tuning of Rat Mesenchymal Stem Cell Senescence via Microtopography of Polymeric Substrates

Autor: Xun Xu, Weiwei Wang, Karl Kratz, Nan Ma, Yan Nie, Andreas Lendlein

Publikováno v: MRS Advances. 5:643-653

Cellular senescence, a driver of aging and age-related diseases, is a stable state found in metabolically active cells characterized by irreversible cell growth arrest and dramatic changes in metabolism, gene expression and secretome profile. Endogen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4e084cdbcc9c635993a47e03a6d8c84e
https://doi.org/10.1557/adv.2019.446

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