1. 2 August 2007 Jon Brame 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

2. 2 August 2007 Jon Brame Overview 1.Project Motivation and Goal 2.Fabrication Process 3.Outcomes

3. 2 August 2007 Jon Brame CNT Properties Change in Conductivity with Strain –Tombler, et al (Nature, 2000) –Single tube

4. 2 August 2007 Jon Brame CNT Properties Change in Conductivity with Strain –Tombler, et al (Nature, 2000) –Single tube

5. 2 August 2007 Jon Brame Motivation Space Magnetometry –Spacecraft Orientation –Magnetic Field Studies Planetary Exploration –Astronaut/Rover Orientation –Planetary Geology

6. 2 August 2007 Jon Brame Device Operation

7. 2 August 2007 Jon Brame Prototype

8. 2 August 2007 Jon Brame Process: Catalyst Indirect Iron Catalyst Deposition Vacuum Chamber for Thin Film Deposition

9. 2 August 2007 Jon Brame Process: SWCNT Growth Chemical Vapor Deposition (CVD) SWCNT Growth CVD Growth Furnace Diagram of CVD Growth Process SEM Image of SWCNT Mat

10. 2 August 2007 Jon Brame Process – Electrical Contact Gold Contact Pads –Detector Development Lab (DDL) –E-Beam Lithography –Deposition: Chrome(100Å)- Gold(1000Å) –Lift-off

11. 2 August 2007 Jon Brame Process – Iron Needle Iron Needle –Device Alignment –E-Beam Lithography pattern –Deposition: Chrome-Iron- Chrome –Lift-off Diagram of SWCNT network, contact pads and iron needle

12. 2 August 2007 Jon Brame Process – Trench Lithography (manual) Etching –Buffered Oxide Etch –KOH Diagram of completed device Au SWCNTs Remnant needle Trench

13. 2 August 2007 Jon Brame Results Completed Magnetometer Prototype Successfully etched trench with SWCNT spanning gap between gold electrodes

14. 2 August 2007 Jon Brame Results Magnetic Field Measurement Testing

15. 2 August 2007 Jon Brame Outcome: BYU Collaboration Growth at BYU Clean Room Class Refinement of Growth Process Photomasks for Rapid Device Fabrication Growth results reproduced at BYU. (approx mag=50Kx)

16. 2 August 2007 Jon Brame 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