CHEMOMECHANICAL ACTUATORS AND SENSORS

Pei and InganSs [933] fabricated bilayer strips similar to those of Otero et al.-CP/Au/poly(ethylene) (PE) or CP/Au/poly(imide) (PI)- but with an entirely different mode of application in mind No electrochemical potential or current was applied, no electrolyte was used, but rather, the bilayers were used as sensors. Their bending was monitored upon exposure to various analytes. P(Py), P(T), and various P(3- 

Define and differentiate in detail the terms electrochemomechanical, chemome-chanicaU electromechanicaL How do the artificial muscles described in this chapter and natural muscles differ in fundamental terms  

Enumerate all possible reasons why a CP-based artificial muscle would work better in aqueous than in nonaqueous environments. Describe in detail its principles of operation on a macroscopic and microscopic (molecular) level. 

What modifications to the work cited in this chapter could be expected to yield more specificity and selectivity in CP chemomechanical sensors  

Compare the advantages and drawbacks of CP based actuators as compared to those based on a piezoelectric polymer such as poly(vinylidene fluoride). Include quantitative comparisons (e.g. tensile stresses, cyclability, response times) wherever possible. 

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