1. Bioinspired Materials - Karin Jacobs, Saarland University

    33:52

    from Kavli Frontiers of Science Added 61 0 0

    Form Follows Function: Bioinspired innovative materials and systems Karin Jacobs, Saarland University Millions of years of a stringent selection process have led to highly complex, extremely well-adapted materials for a wealth of challenges in nature. The results of evolution converge on limited constituents and principles. Answering questions like ‘What forces hold a gecko to a wall? Why do bacteria stick to teeth? Why do some liquids wet a lotus leaf and some bead off?’ help revealing some of the principles. Examples are self-organization, molecular self-assembly, hierarchical constructions, tolerance of defects, efficient recognition sensors and appropriate reproduction processes. I will explain the physical background of a few principles like self-assembly, the origin of which is a minimum (‘valley’) in the energy landscape of the system. A common feature of biomaterials or soft matter science in general is that gravity typically plays a minor role. Proteins from our saliva for instance adsorb to our upper teeth as well as to our lower ones. Here, static and dynamic electromagnetic forces dominate the interactions. Only at very small distances (nanometers and below) so-called ‘short-range forces’ come into play. They are of quantum-mechanical origin and basically take care that if one electron is at one site, another cannot be there. Already minor variations in the chemical composition of the material surface can change the interplay of forces and as a consequence, the gecko possibly will not be able any more to walk on the ceiling. In this talk, I will review a few of many examples where nature inspired scientists to using new pathways of material design and what the future may bring. Suggested Review Articles C. Sanchez, H. Arribart, and M.M. Giraud-Guille Nature Materials 4 (2005) 277-288 B.D. Ratner and S.J. Bryant Annu. Ref. Biomed. Eng. 6 (2004) 41-75 T.P. Russel Science 297 (2002) 964-967 G.M. Whitesides Nature Biotechnology 21 (2003) 1161-1165

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    • Promo Video for Life Size Video Installation Project

      01:11

      from Misklectic Added 61 0 0

      A life size illustration of the chemical reactions happening within us when performing certain task or interacting with one another. Audio - Beats Antique - Charon's Crossing

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      • Garnet Chan: Qualities of a Theoretician

        00:56

        from Princeton Chemistry Added 61 0 0

        Garnet Chan, Professor, Department of Chemistry, Princeton University. One of a series of video shorts profiling the people of the Department of Chemistry at Princeton University. © 2014 The Trustees of Princeton University.

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        • Science is Fun

          01:53

          from Connor Nielsen Added 60 0 0

          The Berkeley High Science Department decides to do a demonstration...

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          • BChO 19 A.S.K.

            05:46

            from LGMOA Added 60 0 0

            Filmed: 15th of April, 2011 Shown: 17th of April, 2011

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            • Student's Video at Tuition Desk

              00:46

              from Tuition Desk Added 60 0 0

              Are you interested to learn something? A new subject? Need improve your math skills, or learn English language? Tuition Desk is a website where you can hire an online teacher and enjoy our online collaborate tools. Join us for free at www.tuitiondesk.com

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              • Grup de Transductors Químics (GTQ)

                04:29

                from Parc de Recerca UAB Added 60 0 0

                El Grup de Transductors Químics (GTQ) és un grup de recerca interdisciplinar que desenvolupa sensors químics en estat sòlid obtinguts mitjançant tecnologia microelectrònica.

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                • Idaho INBRE

                  00:30

                  from Whitney Schroeder Added 60 0 0

                  Promotional Video made for Idaho INBRE.

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