Characterization of Carbon
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Characterization of Carbon Nanofibers /Cavities and Microelectrode Fabrication for Biosensors Application. Holly Tourtillott University of Missouri. Faculty Advisor: Dr. Uche Wejinya Graduate Student Advisor: Zhuxin Dong Department of Mechanical Engineering, University of Arkansas

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Holly tourtillott university of missouri

Characterization of Carbon Nanofibers/Cavities and Microelectrode Fabrication for Biosensors Application

Holly Tourtillott

University of Missouri

  • Faculty Advisor: Dr. Uche Wejinya

    Graduate Student Advisor: Zhuxin Dong

    Department of Mechanical Engineering, University of Arkansas

    July 20, 2009

Micro and Nano Systems Engineering Laboratory, University of Arkansas


Outline

Outline

  • Carbon Nanotubes

  • Microelectrode Fabrication

  • Characterization of Carbon Nanofibers on Electrodes

  • Experiment and Results

  • Conclusion and Future Work

  • References

Micro and Nano Systems Engineering Laboratory, University of Arkansas


Carbon nanotubes

Carbon Nanotubes

  • Carbon nanotubes have remarkable electrical, mechanical and thermal properties.

  • This research focuses on carbon nanotubes band structure to ultimately identify their electrical properties.

  • Using the Atomic Force Microscope and dielectrophoresis, the band structure and therefore conductivity of the CNTs can be determined.

  • The DEP process is used to align and determine the characteristics of the nanofibers.

Micro and Nano Systems Engineering Laboratory, University of Arkansas


Microelectrode fabrication

Microelectrode Fabrication

  • The DEP process requires the fabrication of a microelectrode chip.

Micro and Nano Systems Engineering Laboratory, University of Arkansas


Microelectrode fabrication1

Microelectrode Fabrication

  • The DEP process requires the fabrication of a microelectrode chip.

Micro and Nano Systems Engineering Laboratory, University of Arkansas


Characterization of carbon nanofibers on microelectrodes

Characterization of Carbon Nanofibers on Microelectrodes

  • Using an Agilent 5500-ILM Atomic Force Microscope (AFM), scanning of a microelectrode chip may be conducted.

  • The AFM is a very high-resolution type of scanning probe microscope that has resolution of fractions of a nanometer. We can use this microscope to measure the z-direction of a nanoparticle and in our case the height of the microelectrode chip fibers.

Micro and Nano Systems Engineering Laboratory, University of Arkansas


Characterization of carbon nanofibers on microelectrodes1

Characterization of Carbon Nanofibers on Microelectrodes

Micro and Nano Systems Engineering Laboratory, University of Arkansas


Characterization of carbon nanofibers on microelectrodes2

Characterization of Carbon Nanofibers on Microelectrodes

C1

C2

C3

C4

C5

C6

C7

C8

C9

C1

C9

A3

A5

A7

A2

A4

A8

A1

A6

A9

200 μm square

A1 = Array 1

C1 = Contact Pad 1

Micro and Nano Systems Engineering Laboratory, University of Arkansas


Characterization of carbon nanofibers on microelectrodes3

Characterization of Carbon Nanofibers on Microelectrodes

Cavity

Fiber

9 arrays under camera view to scan

A 9×9µm area scanned in one array, cavities and fibers are found.

3D topography image

Micro and Nano Systems Engineering Laboratory, University of Arkansas


Experiment and results

Experiment and Results

Micro and Nano Systems Engineering Laboratory, University of Arkansas


Conclusion and future work

Conclusion and Future Work

  • Throughout this research, the fabrication of a microelectrode chip was completed as well as the scanning of two NASA microelectrode chips.

  • Future work includes the use of the completed microelectrode chip that was fabricated in this research. This chip was made specifically for the DEP process of aligning carbon nanotubes and ultimately further research in assisting the biosensor applications technology.

Micro and Nano Systems Engineering Laboratory, University of Arkansas


References

References

  • -Microscope: Agilent 5500 ILM, Atomic Force Microscope

  • -Website: http://en.wikipedia.org/wiki/Carbon_nanotubes

  • -Book: Carbon Nanotube- Multifunctional Material, Edited by Prakash R. Somani and M. Umeno, Applied Science Innovations

  • -Website: http://ieeeexplore.org/nanotubes

  • Publication: Zhuxin Dong, Uchechukwu C. Wejinya, Haibo Yu, and Imad H. Elhajj. “Design, Fabricationand Testing of CNT Based ISFET for NANO pH Sensor Application: A Preliminary Study.”

  • Publication: KunalGhosh. “Electronic Band Structure of Carbon Nanotubes.”

Micro and Nano Systems Engineering Laboratory, University of Arkansas


Holly tourtillott university of missouri

Thank You!

Any Questions?

Micro and Nano Systems Engineering Laboratory, University of Arkansas


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