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Effects of Tip Geometry on Image Shape in Nanoscale Topographic Imaging

Investigating the impact of tip geometry on image form using STM topography for metal or semiconductor surfaces. Achieving atomic resolution and topographic information with CNRS-INC technology. Studying cyclodehydrogenation process with C60 fullerene precursor molecules. Actions occurring at room temperature and 700K, leading to distinct triangular and rounded structures. 8

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Effects of Tip Geometry on Image Shape in Nanoscale Topographic Imaging

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  1. Efecto de la geométria de la punta en la forma de la imagen

  2. 2 Å 2 Å

  3. 100x100 nm2

  4. Topographic image 75x75nm SPM: STM Topografy of metal or semiconductor surfaces

  5. Atomic resolution Topografic information SPM: STM CNRS-INC http://www.catalyse.cnrs.fr/

  6. 15x15 nm2

  7. Cyclodehydrogenation • Otero, G., Biddau, G., Sánchez-Sánchez, C., Caillard, R., López, M. F., Rogero, C., Palomares, J., Cabello, N., Basanta, M.A., Ortega, J., Méndez, J., Echavarren, A. M., Pérez, R., Gómez-Lor, B. and Martín-Gago, J. A. • Fullerenesfromaromaticprecursorsbysurfacecatalysedcyclodehydrogenation • Nature454, 865-869 (2008) Temperature C60H30 C60

  8. Triangular structures • Roundedstructures Cyclodehydrogenation RT 700 K 700 K 1.5nm 1.5nm 2.2nm

  9. 5.6x5.6 nm2

  10. 1.5V, 0.2nA

  11. Forma de la punta Choque

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