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Laser Physics

, Volume 19, Issue 5, pp 1142–1151 | Cite as

Multifunctional universal SPM nanoprobe fabrication with laser technology

  • V. P. Veiko
  • A. O. Golubok
  • V. V. Levichev
  • Z. Zuong
  • E. B. Yakovlev
Laser Materials Processing
  • 54 Downloads

Abstract

Scanning probe microscopy (SPM) is a high spatial resolution method of surface topography visualization and measurement of its local properties. The detecting of interaction arising between the sharp solid-state probe and the sample surface is the foundation of SPM. In dependence from nature of this interaction the scanning tunneling microscopy (STM), scanning force microscopy (SFM), scanning near field optical microscopy (SNOM), etc. are distinguished. The spatial resolution of all types of probe microscopy determines both sharpness of increasing of interaction between a probe and a sample at their approach, and shape and size of a top of a solid-state probe. So, the progress in SPM information capabilities is highly depends on probe properties and first of all on properly fabricated aperture size. Fabrication procedures are rather complicated because of nanometric scale size of aperture and hard requirements to reproducibility and need to be improved. The way how to do it by laser-assisted drawing-out is involving of feed-back in a processing procedure-results in two types of feedback for the process of drawing-out has been suggested, tested and installed into the technological set-up. Different probes have been fabricated by above mentioned laser-assisted stretching during this work: SNOM types from optical fibers, micropipettes from quartz glass capillaries, micropipettes with microwires inside and with metallic covers outside. Some examples of application of above mentioned combined probes for cell membrane technology are described. Most important from them are topographical studying of cells and bacteria in living condition (in liquid) and studying of the mechanical properties of cell (rigidity of cell membrane) using the nanopipette as a tip of a force sensor. Except for that using the model sample the measurement of ion current that runs through nanopipette which also carries out a role of a tip of a force sensor have been done. Thus it is shown, that using a probe as a nanopipette, it is possible to combine SPM method with well-known patch-clamp method.

PACS numbers

81.16.Mk 87.64.Dz 

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Copyright information

© Pleiades Publishing, Ltd. 2009

Authors and Affiliations

  • V. P. Veiko
    • 1
  • A. O. Golubok
    • 1
    • 2
  • V. V. Levichev
    • 1
  • Z. Zuong
    • 1
  • E. B. Yakovlev
    • 1
  1. 1.Mechanics and OpticsSt. Petersburg State University of Information TechnologiesSt. PetersburgRussia
  2. 2.Institute for Analytical InstrumentationRussian Academy of SciencesSt. PetersburgRussia

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