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Electroactive micro and nanowells for optofluidic storage.

Bernardo Cordovez1, Demetri Psaltis, David Erickson

  • 1Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853, USA.

Optics Express
|December 10, 2009
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Summary
This summary is machine-generated.

This study introduces an optofluidic system for trapping and storing quantum dots. The technology allows for rapid data storage and retrieval, potentially enabling new fluidic memory devices.

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Area of Science:

  • Optofluidics
  • Nanotechnology
  • Materials Science

Background:

  • Semiconductor quantum dots (QDs) offer unique optical properties for advanced applications.
  • Efficient methods for controlled manipulation and long-term storage of QDs are crucial for device development.
  • Optofluidic systems provide a versatile platform for nanoscale fluid handling and optical interrogation.

Purpose of the Study:

  • To develop an optofluidic architecture for reversible trapping, detection, and long-term storage of spectrally multiplexed semiconductor quantum dot cocktails.
  • To characterize the performance of these optofluidic wells, including storage and erasure speeds, signal uniformity, and storage density.
  • To present a novel method for passive long-term QD storage using an agarose gel matrix.

Main Methods:

  • Fabrication of electrokinetically active optofluidic wells (200nm to 5microm).
  • Microfluidic delivery and trapping of semiconductor quantum dot cocktails.
  • Characterization of readout capabilities, storage/erasure speeds, spatial uniformity, and storage density.
  • Implementation of an agarose gel matrix for passive long-term storage.

Main Results:

  • Demonstrated reversible trapping and detection of QD cocktails in wells.
  • Achieved storage and erasure speeds of <153ms and <30ms, respectively.
  • Reported 6-bit storage capacity per 200nm well via spectral and intensity multiplexing.
  • Successfully implemented passive long-term storage using an agarose gel matrix.

Conclusions:

  • The developed optofluidic architecture enables efficient, high-density storage of quantum dots.
  • Fast storage and erasure speeds, coupled with multiplexing capabilities, show promise for data storage applications.
  • The novel passive storage method using agarose gel enhances the longevity of quantum dots in optofluidic devices.
  • This technology holds potential for future applications in fluidic memory and display devices.