Abstract Submitted to the NANOTUBE-99 Workshop:

Electromechanical actuators based on sheets of single-wall carbon nanotubes are shown to provide higher stress generation capabilities than natural muscle, and higher strains than high modulus ferroelectrics. Both solid-state actuators and actuators that run in salt water are demonstrated and characterized. Like natural muscles, the macroscopic actuators are assemblies of billions of individual nano-scale actuators. The actuator mechanism (quantum-chemical-based expansion) does not require ion intercalation processes, which limit the life and rate of faradaic conducting polymer actuators. Low operating voltages of a few volts and high temperature capabilities are advantages compared with ferroelectrics. Although device development is at an early stage, predictions based on measurements suggest that nanotube actuators may eventually provide substantially higher work densities per cycle and higher stress generation capabilities than any previously known technology.

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