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Related Experiment Videos

Novel molecular device based on electrostatic interactions in organic polymers.

H L Kwok1, J B Xu

  • 1Centre for Advanced Materials & Related technology (CAMTEC), University of Victoria, Canada.

IEE Proceedings. Nanobiotechnology
|February 16, 2006
PubMed
Summary

Researchers designed a molecular device by adding space charge to polymers, controlling current flow. This method enables manipulation of potential troughs, forming the basis for novel electronic components.

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Area of Science:

  • Molecular electronics
  • Polymer science
  • Nanotechnology

Background:

  • Designing molecular-level devices is an active research area.
  • Electrostatic interactions within polymers offer a pathway for device fabrication.
  • Controlling charge distribution is key to molecular device functionality.

Purpose of the Study:

  • To report a method for creating molecular devices using space charge.
  • To investigate the effect of space charge on polymer backbone potential.
  • To correlate space charge effects with carrier mobilities for potential device applications.

Main Methods:

  • Introducing space charge into polymer molecules with symmetric and asymmetric subgroups.
  • Analyzing the resulting dipolar charge layers and potential troughs.

Related Experiment Videos

  • Examining the impact of space charge modulation on terminal current and potential profiles.

    • Main Results:

    • Space charge creates a potential trough in the polymer backbone, modulating terminal current.
    • The study correlated space charge effects with carrier mobilities in OC1C10-PPV.
    • Modulation of space charge allows for the manipulation of current flow along the polymer.

    Conclusions:

    • The developed method provides a basis for creating molecular electronic devices.
    • The molecular device exhibits current-voltage characteristics analogous to a MOSFET at subthreshold.
    • Estimated device performance includes transconductance of 1-2 pAV and a cutoff frequency of approximately 10(15) Hz.