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A SWNT based Nanocompass for High Spatial Resolution Magnetometry

A SWNT based Nanocompass for High Spatial Resolution Magnetometry. Jon Brame, Johnathan Goodsell Presented by Bryan Hicks Brigham Young University NASA GSFC Code 541 ESMD Student-Faculty Program. Overview. Project Motivation and Goal Fabrication Process Outcomes. CNT Properties.

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A SWNT based Nanocompass for High Spatial Resolution Magnetometry

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  1. A SWNT based Nanocompass for High Spatial Resolution Magnetometry Jon Brame, Johnathan Goodsell Presented by Bryan Hicks Brigham Young University NASA GSFC Code 541 ESMD Student-Faculty Program Jon Brame

  2. Overview • Project Motivation and Goal • Fabrication Process • Outcomes Jon Brame

  3. CNT Properties • Change in Conductivity with Strain • Tombler, et al (Nature, 2000) • Single tube Jon Brame

  4. CNT Properties • Change in Conductivity with Strain • Tombler, et al (Nature, 2000) • Single tube Jon Brame

  5. Motivation • Space Magnetometry • Spacecraft Orientation • Magnetic Field Studies • Planetary Exploration • Astronaut/Rover Orientation • Planetary Geology Jon Brame

  6. Device Operation Jon Brame

  7. Prototype Jon Brame

  8. Vacuum Chamber for Thin Film Deposition Process: Catalyst • Indirect Iron Catalyst Deposition Jon Brame

  9. CVD Growth Furnace Diagram of CVD Growth Process SEM Image of SWCNT Mat Process: SWCNT Growth • Chemical Vapor Deposition (CVD) SWCNT Growth Jon Brame

  10. Process – Electrical Contact • Gold Contact Pads • Detector Development Lab (DDL) • E-Beam Lithography • Deposition: Chrome(100Å)-Gold(1000Å) • Lift-off Jon Brame

  11. Diagram of SWCNT network, contact pads and iron needle Process – Iron Needle • Iron Needle • Device Alignment • E-Beam Lithography pattern • Deposition: Chrome-Iron-Chrome • Lift-off Jon Brame

  12. Au SWCNTs Remnant needle Au Diagram of completed device Process – Trench • Lithography (manual) • Etching • Buffered Oxide Etch • KOH Trench Jon Brame

  13. Successfully etched trench with SWCNT spanning gap between gold electrodes Results • Completed Magnetometer Prototype Jon Brame

  14. Results • Magnetic Field Measurement Testing Jon Brame

  15. Growth results reproduced at BYU. (approx mag=50Kx) Outcome: BYU Collaboration • Growth at BYU • Clean Room Class • Refinement of Growth Process • Photomasks for Rapid Device Fabrication Jon Brame

  16. Acknowledgements • Dr. Stephanie Getty and NASA Goddard Space Flight Center code 541 • Dr. David Allred: BYU Physics Dept. • Bryan Hicks, Rachel Bis, Melissa Harrison • Branch 541: Dewey Dove, Bruno Munoz, Carl Taylor, Len Wang • Division 540; Dick Fahey; Joshua Halpern; ESMD; Rocky Mountain Space Grant Consortium • BYU: Dr. Richard VanFleet, Dr. Jeffrey Farrer, Dr. Robert Davis, David Hutchinson • Other: Lynda Goodsell, Bill Heaps Jon Brame

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