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Herringbone Reconstruction of Au{111}, 2 IMPORTANT PAPERS:

Herringbone Reconstruction of Au{111}, 2 IMPORTANT PAPERS:. 1. 2. 1. 22. Au{111} 23 x  3. 110. 112. Au{111} 1x1. 110. 112. Au{111} 23 x  3. 110. 112. Au{111} 23 x  3. 110. 112. Au{111} 23 x  3. 110. 110. 112. Au{111} 23 x  3. 3- fold symmetry

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Herringbone Reconstruction of Au{111}, 2 IMPORTANT PAPERS:

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  1. Herringbone Reconstruction of Au{111}, 2 IMPORTANT PAPERS: 1 2

  2. 1 22 Au{111} 23 x 3 110

  3. 112 Au{111} 1x1 110

  4. 112 Au{111} 23 x 3 110

  5. 112 Au{111} 23 x 3 110

  6. 112 Au{111} 23 x 3 110

  7. 110 112 Au{111} 23 x 3

  8. 3- fold symmetry Strain in the one direction is relaxed over whole surface in 2 dimensions

  9. Au{111} 23 x 3 120 degree turns give uniform contraction!

  10. Dimensions: Bulk Au = 2.88 A Therefore in direction spacing = 2.88 A In direction spacing = 2.75 A 110 112 That’s why Maksymovych et al. say average distance = 2.81 A

  11. Au Surface 6 K February 20 Run 4 _3 X = 19.2 nm Y = 19.2 nm Z = 185.1 pm Run 5_2 X = 12.5 nm Y = 12.5 nm Z = 46.13 pm Atomic Resolution Herringbones Adsorbates Atomic resolution Herringbones

  12. Au Surface 6 K SULFUR ATOM AT STEP EDGE? February 20 Run 4_1 X = 19.2 nm Y = 19.2 nm Z = 296.5 pm Adsorbate not on HB Run 3_1 X = 61.7 nm Y = 58.6 nm Z = 432.6 pm

  13. Au Surface 6 K February 20 Run 10_1 X = 125 nm Y = 125 nm Z = 620.9 pm 0.5 V 0.2 nA Adsorbates seen at elbows after heating – styrene?

  14. What about the elbows? hcp fcc hcp fcc fcc hcp

  15. Screw Dislocation: STMA 1004, Vtip = 0.05 V/ 200pA 170 Å x 170 Å

  16. Screw Dislocation:

  17. Screw Dislocation:

  18. Herringbone Defect February 11 run 2_2 80 K 0.5 V Airlegs down X = 7.16 nm Y = 8.62 nm Z = 60.71 pm Steps, terraces, herringbones, missing atom at HB elbow.

  19. Au atoms and defect February 10, run 3_15 80 K Airlegs down 2-D X = 34.8 nm Y = 21.0 nm Z = 76.84 pm Gold atoms, defect in terrace.

  20. CAN WE MODEL THE ELBOW AND UNDERSTAND THE MISSING ATOM AT THE ELBOW? CAN WE RECORD ATOMIC IMAGES OF Au{111} AT 7 K?

  21. Naturally Chiral Surfaces STM of Cu{643} at 80 Kelvin Cu{643} sample was cleaned with 5 cycles of sputtering with Argon at 1.5 keV / 14 µA for 40 min with a 1000 K anneal for 2-3 mins at the end of each cycle.

  22. 3-7 4/13/06 I=0.5 nA V=-0.3 V 125 x 125 nm2 4/19/06

  23. 3-8 4/13/06 50 x 50 nm2 I=0.5 nA V=-0.3 V 4/19/06

  24. 3-8 4/13/06 50 x 50 nm2 I=0.5 nA V=-0.3 V 4/19/06

  25. 3-9 4/13/06 30 x 30 nm2 I=0.5 nA V=-0.3 V 4/19/06

  26. 3-10 4/13/06 20 x 20 nm2 I=0.5 nA V=-0.3 V 4/19/06

  27. 3-11 4/13/06 20 x 20 nm2 I=0.5 nA V=-0.3 V 4/19/06

  28. 3-28 4/13/06 4 x 4 nm2 I=0.1 nA V=-0.3 V 4/19/06

  29. 3-29 4/13/06 5 x 5 nm2 I=0.1 nA V=-0.3 V 4/19/06

  30. 3-31 4/13/06 5 x 5 nm2 I=0.09 nA V=-0.3 V 4/19/06

  31. 3-35 4/13/06 I=0.09 nA V=-0.3 V 4/19/06

  32. 3-36 4/13/06 I=0.09 nA V=-0.3 V 3 x 1.5 nm2 4/19/06

  33. 3-45 4/13/06 9 x 9 nm2 I=0.09 nA V=-0.3 V 4/19/06

  34. 3-45 4/13/06 Comparison: 9 x 9 nm2 I=0.09 nA V=-0.3 V 4/19/06

  35. Next 7 Kelvin Run; Starts Friday: Put in a new tip (W) B4 cold Check Springs are ok Au{111} atomic res? Cu{643} at 7 K – many images to do stats. MCHO dosed on crystal – adsorbs where? MCHO movie while doing 0.2 x 10-11 This week: Movies – so we can see herringbones in every frame

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