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Bottom-up Design

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Woo-young Choi – 1st expert on this subject based on the ideXlab platform

  • IROS – Soft LEGO: Bottom-up Design Platform for Soft Robotics
    2018 IEEE RSJ International Conference on Intelligent Robots and Systems (IROS), 2018
    Co-Authors: Woo-young Choi

    Abstract:

    This paper introduces soft LEGO for Bottom-up Design platform of soft robotics that can be used for various purposes, ranging from research and fast prototyping of soft robots to toys and entertainment. We integrated the interlocking mechanism of LEGO into a modular soft robot. With this Design, soft robots could be built by a simple and play-like assembling process. Three kinds of components were proposed to make soft robotics compatible with LEGO: pneumatically inflatable soft brick, flexible bending brick, and channel brick. The soft brick has an air chamber and can generate motions when inflated. The bending brick has flexure and is bendable for generating motion when the assembled soft bricks are pneumatically actuated. The air channel brick has an air channel inside and works as an interface between air hoses and soft LEGO bricks. Detailed Design parameters of the soft brick were optimized based on the Taguchi method with finite-element analysis to improve robustness. Design of the bending brick was selected based on experimental results to enhance the robustness of the flexure. Thanks to the multi-material 3-dimensional printer, the soft LEGO bricks could be fabricated with a single printing process. To see the feasibility of soft LEGO as a Bottom-up Design platform, a simple toy robot for children and a gripper that had a hybrid mechanism of hard and soft materials were built and tested. We hope this soft LEGO could lower the hurdle of soft robotics for children, researchers from other fields, and the public interest in robotics.

  • Soft LEGO: Bottom-up Design Platform for Soft Robotics
    2018 IEEE RSJ International Conference on Intelligent Robots and Systems (IROS), 2018
    Co-Authors: Woo-young Choi

    Abstract:

    This paper introduces soft LEGO for Bottom-up Design platform of soft robotics that can be used for various purposes, ranging from research and fast prototyping of soft robots to toys and entertainment. We integrated the interlocking mechanism of LEGO into a modular soft robot. With this Design, soft robots could be built by a simple and play-like assembling process. Three kinds of components were proposed to make soft robotics compatible with LEGO: pneumatically inflatable soft brick, flexible bending brick, and channel brick. The soft brick has an air chamber and can generate motions when inflated. The bending brick has flexure and is bendable for generating motion when the assembled soft bricks are pneumatically actuated. The air channel brick has an air channel inside and works as an interface between air hoses and soft LEGO bricks. Detailed Design parameters of the soft brick were optimized based on the Taguchi method with finite-element analysis to improve robustness. Design of the bending brick was selected based on experimental results to enhance the robustness of the flexure. Thanks to the multi-material 3-dimensional printer, the soft LEGO bricks could be fabricated with a single printing process. To see the feasibility of soft LEGO as a Bottom-up Design platform, a simple toy robot for children and a gripper that had a hybrid mechanism of hard and soft materials were built and tested. We hope this soft LEGO could lower the hurdle of soft robotics for children, researchers from other fields, and the public interest in robotics.

Jan-dierk Grunwaldt – 2nd expert on this subject based on the ideXlab platform

  • bottom up Design of a copper ruthenium nanoparticulate catalyst for low temperature ammonia oxidation
    Angewandte Chemie, 2017
    Co-Authors: Debasish Chakraborty, Christian Danvad Damsgaard, Christian Conradsen, Jakob Lind Olsen, Hudson W.p. Carvalho, Benjamin Mutz, Thomas Bligaard, Max J. Hoffmann, Hugo Jose Lopes Silva, Jan-dierk Grunwaldt

    Abstract:

    : A novel nanoparticulate catalyst of copper (Cu) and ruthenium (Ru) was Designed for low-temperature ammonia oxidation at near-stoichiometric mixtures using a Bottom-up approach. A synergistic effect of the two metals was found. An optimum CuRu catalyst presents a reaction rate threefold higher than that for Ru and forty-fold higher than that for Cu. X-ray absorption spectroscopy suggests that in the most active catalyst Cu forms one or two monolayer thick patches on Ru and the catalysts are less active once 3D Cu islands form. The good performance of the tuned Cu/Ru catalyst is attributed to changes in the electronic structure, and thus the altered adsorption properties of the surface Cu sites.

  • Bottom-up Design of a Copper–Ruthenium Nanoparticulate Catalyst for Low-Temperature Ammonia Oxidation
    Angewandte Chemie – International Edition, 2017
    Co-Authors: Debasish Chakraborty, Christian Danvad Damsgaard, Hugo Silva, Christian Conradsen, Jakob Lind Olsen, Hudson W.p. Carvalho, Benjamin Mutz, Thomas Bligaard, Max J. Hoffmann, Jan-dierk Grunwaldt

    Abstract:

    A novel nanoparticulate catalyst of copper (Cu) and ruthenium (Ru) was Designed for low-temperature ammonia oxidation at near-stoichiometric mixtures using a Bottom-up approach. A synergistic effect of the two metals was found. An optimum CuRu catalyst presents a reaction rate threefold higher than that for Ru and forty-fold higher than that for Cu. X-ray absorption spectroscopy suggests that in the most active catalyst Cu forms one or two monolayer thick patches on Ru and the catalysts are less active once 3D Cu islands form. The good performance of the tuned Cu/Ru catalyst is attributed to changes in the electronic structure, and thus the altered adsorption properties of the surface Cu sites.

Debasish Chakraborty – 3rd expert on this subject based on the ideXlab platform

  • bottom up Design of a copper ruthenium nanoparticulate catalyst for low temperature ammonia oxidation
    Angewandte Chemie, 2017
    Co-Authors: Debasish Chakraborty, Christian Danvad Damsgaard, Christian Conradsen, Jakob Lind Olsen, Hudson W.p. Carvalho, Benjamin Mutz, Thomas Bligaard, Max J. Hoffmann, Hugo Jose Lopes Silva, Jan-dierk Grunwaldt

    Abstract:

    : A novel nanoparticulate catalyst of copper (Cu) and ruthenium (Ru) was Designed for low-temperature ammonia oxidation at near-stoichiometric mixtures using a Bottom-up approach. A synergistic effect of the two metals was found. An optimum CuRu catalyst presents a reaction rate threefold higher than that for Ru and forty-fold higher than that for Cu. X-ray absorption spectroscopy suggests that in the most active catalyst Cu forms one or two monolayer thick patches on Ru and the catalysts are less active once 3D Cu islands form. The good performance of the tuned Cu/Ru catalyst is attributed to changes in the electronic structure, and thus the altered adsorption properties of the surface Cu sites.

  • Bottom Up Design of a Novel CuRu Nanoparticulate Catalyst for Low Temperature Ammonia Oxidation
    Angewandte Chemie, 2017
    Co-Authors: Debasish Chakraborty, Christian Danvad Damsgaard, Christian Conradsen, Hudson W.p. Carvalho, Benjamin Mutz, Thomas Bligaard, Max J. Hoffmann, Hugo Jose Lopes Silva, Felix Studt, Ib Chorkendorff

    Abstract:

    A novel nanoparticulate catalyst of copper and ruthenium is Designed for low temperature ammonia oxidation at near stoichiometric mixtures using a bottom up approach. A synergistic effect of the two metals is found: an optimum CuRu catalyst shows reaction rate three-fold higher than Ru and fourty-fold higher than Cu. X-ray Absorption Spectroscopy (XAS) suggests that in the most active catalyst Cu forms one or two monolayer thick patches on Ru and the catalysts are less active once 3D Cu-islands form. The good performance of Cu/Ru is attributed to the change in the electronic structure and thus the altered adsorption properties of the surface Cu sites.

  • Bottom-up Design of a Copper–Ruthenium Nanoparticulate Catalyst for Low-Temperature Ammonia Oxidation
    Angewandte Chemie – International Edition, 2017
    Co-Authors: Debasish Chakraborty, Christian Danvad Damsgaard, Hugo Silva, Christian Conradsen, Jakob Lind Olsen, Hudson W.p. Carvalho, Benjamin Mutz, Thomas Bligaard, Max J. Hoffmann, Jan-dierk Grunwaldt

    Abstract:

    A novel nanoparticulate catalyst of copper (Cu) and ruthenium (Ru) was Designed for low-temperature ammonia oxidation at near-stoichiometric mixtures using a Bottom-up approach. A synergistic effect of the two metals was found. An optimum CuRu catalyst presents a reaction rate threefold higher than that for Ru and forty-fold higher than that for Cu. X-ray absorption spectroscopy suggests that in the most active catalyst Cu forms one or two monolayer thick patches on Ru and the catalysts are less active once 3D Cu islands form. The good performance of the tuned Cu/Ru catalyst is attributed to changes in the electronic structure, and thus the altered adsorption properties of the surface Cu sites.