In the work it is shown practical use of a scanning tunneling microscope for indentation in the continuous micro- and
nano-range. A maximum load of 2.64 cN (and 0.4 cN minimum) was applied on a piezo-scanner to achieve the
indentation. The relaxation changes of modified surface by contact method was investigated. It is shown that within a
few hours of modification there is clear evidence of inevitable loss of information about the morphology of initially
modified area. The possibility of modifying the sample surface by tunneling current was shown. This may enable
preparation of the surface for subsequent applications in which it is necessary to reduce the average irregularities of the
surface. Nano-objects on the surface of the experimental samples were created by using the developed method.
In the paper the process of controlled formation of nanostructured silicon is demonstrated and the optical performance
compared to standard and textured interfaces. The influence of the formation technique type on its structure, photoluminescent
and anti-reflecting properties is studied. The layers of nanostructured silicon have been formed on the
textured surface of solar cells. It has been demonstrated that the use of nanostructured silicon reduces the anti-reflection
coefficient significantly. It is also shown, that the formation of nanostructured silicon on a textured substrate of singlecrystal
silicon after formation on them of contact systems results in decrease of consecutive resistance, increase of short
circuit current, decrease of shunting resistance and increase of efficiency.
In this report we propose a new instrumental method for the biochemical diagnostics of the bovine leucosis through the
registration of the formation of the specific immune complex (antigen-antibody) with the help of biosensor based on the
nano-structured silicon. The principle of the measurements is based on the determination of the photosensitivity of the
surface. In spite of the existed traditional methods of the biochemical diagnostics of the bovine leucosis the proposed
approach may provide the express control of the milk quality as direct on the farm and during the process raw materials.
The proposed variant of the biosensor based on the nano-structured silicon may be applied for the determination of the
concentration of different substances which may form the specific complex in the result of the bioaffine reactions. A new
immune technique based on the nanostructured silicon and intended for the quantitative determination of some toxic
substances is offered. The sensitivity of such biosensor allows determining T-2 mycotoxin at the concentration of 10
ng/ml during several minutes.
Nanocrystalline silicon layers ( 3-35nm ) have been formed upon single-crystal silicon substrates of very large area (100 cm2), multicrystalline silicon substrates and metallurgical silicon substrates by stain etching. We studied optical and structural properties of nanocrystalline silicon by photoluminescence, reflection, scanning tunnel microscopy, scanning electron microscopy, Auger electronic spectroscopy and SIMS methods. Researches of properties of nc-Si, received by a method of chemical processing, have confirmed an opportunity of creation of this multifunctional material with stable characteristics. The authors have observed the sensors systems with use of nanocrystalline silicon as a sensitive layer, which properties depend on thickness of a received layer and are controlled by parameters of technological process. On an example of the photoluminescent sensor with nc-Si layer it is shown, that such sensor can be successfully used for definition of small concentrations of toxins (pesticides phosalone 10-8-10-9 mol/l ), and also for specific biological pollutant, such as protein components, polysaccharides, cells used during biotechnological synthesis.