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1. WO2004102582 - SONDES A BASE DE NANOTUBES DE CARBONE, DISPOSITIFS APPARENTES ET PROCEDES POUR REALISER CES SONDES

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

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CLAIMS

We claim:

1. A device for high resolution probing a surface, comprising:
a support member;
an extension portion attached to a distal end of said support member, wherein a core of said extension portion electrically connected to said support member, said core comprising a carbon nanotube or ferromagnetic composition; and
an electrically insulating sheath layer disposed on a portion of said core, wherein a tip portion of said core opposite said support member does not include said sheath layer.

2. The device of claim 1, wherein said core comprises a single wall carbon nanotube, said device comprising an AFM probe.

3. The device of claim 1, wherein said sheath layer comprises a polymer.

4. The device of claim 1, wherein a length of said tip portion is less than 0.5 μm.

5. The device of claim 1, wherein a thickness of said sheath layer is at least 50 nm.

6. The device of claim 1, wherein said core comprises said ferromagnetic composition, said device comprising an MFM probe.

7. The device of claim 6, wherein said core is substantially cylindrically shaped.

8. The device of claim 7, wherein a diameter of said core is in a range from 1 nm to 40 nm.

9. The device of claim 8, wherein a diameter of said core is less than 7 nm.

10. The device of claim 8, wherein a diameter of said core is less than 4 nm.

11. The device of claim 8, wherein a diameter of said core is less than 2 nm.

12. A method of forming a device for probing a surface, comprising the steps of:

providing an electrically conductive support member having a carbon nanotube attached thereto;
coating a surface of said nanotube with a sheath layer to form a coated nanotube; and
selectively removing said sheath layer from a tip portion of said coated nanotube.

13. The method of claim 12, wherein a laser beam or focused ion beam is used for said selective removing step.

14. The method of claim 13, wherein said laser emits polarized radiation, said polarization oriented substantially perpendicular to a length of said nanotube.

15. The method of claim 12, wherein said selective removing step comprises abrasion of said coated nanotube tip against an abrasive surface, wherein said abrasion comprises buckling said coated nanotube tip against said abrasive surface and then translating said coated nanotube tip across said surface.

16. The method of claim 12, further comprising the step of selectively removing at least a portion of said nanotube to form a cylindrical cavity.

17. The method of claim 16, wherein said selective removal of said nanotube step comprises electrochemical etching.

18. The method of claim 16, further comprising the step of depositing a ferroelectric composite core inside said cavity.

19. The method of claim 18, wherein said depositing step comprises
electrodeposition.

20. The method of claim 18, wherein a diameter of said core is in a range from 1 nm to 40 nm.