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A.S.WN.T.-Based Nanocompass for High Spatial Resolution Magnetometry

This project presents the development of an A.S.WN.T.-based nanocompass designed for high spatial resolution magnetometry, crucial for applications in space magnetometry and planetary exploration. The presentation covers the project's motivation, fabrication processes including chemical vapor deposition (CVD) of single-walled carbon nanotubes (SWCNTs), and device operation. Key results include the successful measurement of magnetic fields, collaboration outcomes, and innovations in growing SWCNTs. The project emphasizes the importance of refined growth processes and rapid device fabrication using advanced lithography.

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A.S.WN.T.-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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