1. Measurement of CNT Based Fibers and Cavities Holly Tourtillott University of Missouri Micro and Nano Systems Engineering Laboratory, University of Arkansas

2. Outline Carbon Nanotubes Objectives Microelectrode Chip Measurement of NanoCavities and Fiber Electrodes Measurement Result References Micro and Nano Systems Engineering Laboratory, University of Arkansas

3. Carbon Nanotubes Seamless hollow cylinder with diameter of approximately one to fifty nanometers Can be basically divided into two kinds: Single walled and multi walled Are the strongest and stiffest materials yet discovered in terms of tensile strength and elastic modulus respectively Used in solar cells, electrical circuits, ultracapacitors, and often used as a vessel for transporting drugs into the body Micro and Nano Systems Engineering Laboratory, University of Arkansas

4. Objectives Measurement of cavities and fibers on micro- electrode chip – Scan the entire electrode using the AFM tool – Measure the height of the fibers, depth of the cavities and diameters of both – Match the fibers into the cavities to fabricate microelectrodes and sensors Micro and Nano Systems Engineering Laboratory, University of Arkansas

5. Microelectrode Chip A1 A7 A6 A9 A2A4A8 A3A5 A1 = Array 1 C1 = Contact Pad 1 C1C9 C1C9 C3C2C4C5C6C8C7 200 μm square Micro and Nano Systems Engineering Laboratory, University of Arkansas

6. Measurement of Nano Cavities and Fiber Electrodes 6 9 arrays under camera view to scan A 3D topography image Micro and Nano Systems Engineering Laboratory, University of Arkansas A 9×9µm area scanned in one array, cavities and fibers are found. Cavity Fiber

7. Measurement Result 7 AverageDiameter_CavityDepth_CavityDiameter_FiberHeight_FiberRemark A1 A2 A3 A4 A5 A6 A7 A8 A9 Overall Micro and Nano Systems Engineering Laboratory, University of Arkansas

8. References 8 -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 Micro and Nano Systems Engineering Laboratory, University of Arkansas

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