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Home Material Sciences High-Field Nanotechnology For Processing A Metal Surface

High-Field Nanotechnology For Processing A Metal Surface

Description

Various modifications of method of evaporation in high electric fields are the most promising methods of forming surface of different objects of nanometer-scale. However, the main obstacle to the use of this method is the necessity of creation of super high electric fields on a surface of the object subjected to processing. In such fields there are serious technological problems connected with the destruction of objects under the action of mechanical stress generated by the electric field. In this connection, we propose to use phenomenon of high-field evaporation of metals in dielectric liquids at low temperatures. This phenomenon was revealed and studied by our team together with University of Surrey School of Electronic (Surrey, UK) and Hahn-Meitner-Institute (Berlin, Germany). This phenomenon and process of field evaporation in active gases could be used for controlled forming of metal objects with the sizes in a nanometer range. The magnitude of electric fields below the level of field evaporation in high vacuum is required for the realization of high-field evaporation of metals in dielectric liquids. This opens up technological prospects for practical use of this phenomenon.

Innovative Aspect and Main Advantages

  • formation of surface with a zero-level roughness (atomically smooth metal surface)
  • high degree of localization of field emission
  • atomic sharpness of STM probes
  • lowering traumatic effects of microsurgical instruments

Areas of Application

  • field emitters
  • probes for scanning tunneling microscopy and nanotechnology
  • microsurgical instruments with qualitative changes of a roughness level


Fig. 1 Field ion microscopic images of STM probe before
high-field sharpening


Fig. 2 Field ion microscopic images of STM probe after
high-field sharpering

Stage of Development

Patents received:

  • Method of fabrication of tip objects, Patent of Ukraine, UA 6607 U, 16.05.2005, Velikodnaya O.A., Ksenofontov V.A., Mikhailovskij I.M., Sadanov E.V.
  • Method of fabrication of tip objects, Patent of Ukraine, UA 8336 U, 15.07.2005, Velikodnaya O.A., Ksenofontov V.A., Mikhailovskij I.M., Sadanov E.V.

Contact Details

Ksenofontov Vyacheslav Alekseevich
National Scientific Center, "Kharkov Institute of Physics and Technology"
1 Akademicheskaja St., 61108 Kharkov, Ukraine
Tel. +380 57 7002676; +380 57 7576428
Fax:+380 57 3351688
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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