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Related Concept Videos

Microtubules01:35

Microtubules

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There are three types of cytoskeletal structures in eukaryotic cells—microfilaments, intermediate filaments, and microtubules. With a diameter of about 25 nm, microtubules are the thickest of these fibers. Microtubules carry out a variety of functions that include cell structure and support, transport of organelles, cell motility (movement), and the separation of chromosomes during cell division.
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Development of a Microfluidics-Based Approach for Investigating Microtubule Polymer Mechanics
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Conducting Polymer Microtubes for Bioactuators.

Mohammadjavad Eslamian, Fereshtehsadat Mirab, Sheereen Majd

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |January 18, 2020
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    Summary
    This summary is machine-generated.

    This study presents a novel tri-layer actuator using poly(pyrrole) microtubes for biomedical applications. The actuator demonstrated reversible bending, with performance influenced by scan rate during electrochemical doping.

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    Area of Science:

    • Materials Science
    • Biomedical Engineering
    • Polymer Science

    Background:

    • Conducting polymers (CPs) offer potential for biomedical devices like artificial muscles and drug delivery systems.
    • Poly(pyrrole) (PPy) microtubes (MTs) are explored as a component for advanced actuator designs.
    • Doping with poly(sodium-p-styrenesulfonate) (PSS) is investigated to enhance PPy MT properties.

    Purpose of the Study:

    • To develop and characterize a novel tri-layer actuator based on PPy MTs.
    • To investigate the electrochemical and actuation behavior of the PPy MTs actuator.
    • To evaluate the effect of scan rate on actuator performance.

    Main Methods:

    • Fabrication of PPy MTs via electrochemical deposition around poly(lactic-co-glycolic acid) (PLGA) templates.
    • Redox processing of PPy MTs using cyclic voltammetry in NaPSS electrolyte.
    • Measurement of actuator tip deflection to assess bending behavior and actuation strain at various scan rates.

    Main Results:

    • The PPy MTs actuator exhibited reversible bending movements during electrochemical cycling.
    • Actuation strain and maximum deflection decreased with increasing scan rates.
    • The tri-layer actuator design demonstrated functional bending capabilities.

    Conclusions:

    • The developed PPy MTs actuator shows promise for biomedical applications requiring controlled movement.
    • Scan rate is a critical parameter influencing the performance and actuation strain of the PPy actuator.
    • Further optimization of fabrication and electrochemical processing could enhance actuator efficiency.