Christoph Keplinger

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Soft robots actuated by inflation of a pneumatic network (a " pneu-net ") of small channels in elastomeric materials are appealing for producing sophisticated motions with simple controls. Although current designs of pneu-nets achieve motion with large amplitudes, they do so relatively slowly (over seconds). This paper describes a new design for pneu-nets(More)
Existing stretchable, transparent conductors are mostly electronic conductors. They limit the performance of interconnects, sensors, and actuators as components of stretchable electronics and soft machines. We describe a class of devices enabled by ionic conductors that are highly stretchable, fully transparent to light of all colors, and capable of(More)
Scientists are exploring elastic and soft forms of robots, electronic skin and energy harvesters, dreaming to mimic nature and to enable novel applications in wide fields, from consumer and mobile appliances to biomedical systems, sports and healthcare. All conceivable classes of materials with a wide range of mechanical, physical and chemical properties(More)
Relating the onset of clinical attacks as recorded on a videotape to surface and depth electrographic events improves our ability to define the local or diffuse origin of seizures. In two patients with complex partial seizures, all 14 attacks appeared 3 to 6 seconds after focal discharges began in the amygdala or hippocampus. This meant that the spread of(More)
Keywords: Dielectric elastomer Finite strain Snap-through instability Bifurcation Electromechanical processes a b s t r a c t Dielectric elastomers are capable of large voltage-induced deformation, but achieving such large deformation in practice has been a major challenge due to electromechanical instability and electric breakdown. The complex nonlinear(More)
—Dielectric elastomers are being developed as generators to harvest energy from renewable sources, such as human movements and ocean waves. We model a generator as a system of two degrees of freedom, represented on either the stress–stretch plane or the voltage–charge plane. A point in such a plane represents a state of the generator, a curve represents a(More)
a Clean, renewable and abundant sources of energy, such as the vast energy of ocean waves, are untapped today, because no technology exists to convert such mechanical motions to electricity economically. Other sources of mechanical energy, such as motions of people and vibrations of buildings and bridges, can potentially power portable electronics and(More)
Mixing properties of coaxial jets with large velocity ratios and large inverse density ratios Phys. Fluids 24, 055101 (2012) Towards constructing multi-bit binary adder based on Belousov-Zhabotinsky reaction A low-voltage high-speed electronic switch based on piezoelectric transduction Highly precise and compact ultrahigh vacuum rotary feedthrough Rev.(More)
Dielectric elastomer generators convert mechanical into electrical energy at high energy density, showing promise for large and small scale energy harvesting. We present an experiment to monitor electrical and mechanical energy flows separately and show the cycle of energy conversion in work-conjugate planes. A specific electrical energy generated per cycle(More)