Resonance tunneling electron-vibrational spectroscopy of polyoxometalates.

The tunneling spectra of the ordered monolayer films of decamolybdodicobaltate (DMDC) compounds deposited from aqueous solutions on HOPG were measured by scanning tunnel microscopy in air. The DMDC spectra, as well as the tunneling spectra of other polyoxometalates (POMs), exhibit well-defined negative differential resistances (NDRs). The mechanism of formation of these spectral features was established from the collection of revealed NDR dependences on the external varying parameters and found to be common to all systems exhibiting Wannier-Stark localization.

[Results of integrated tests of the facility to disinfect gaseous environment of orbital stations].

The microbiological safety control with the use of the Potok 150M facility aboard operational orbital station of Mir series is discussed. The test results indicated that the facility does not actually influence the content of harmful microscopic admixtures in a gaseous medium of the mock-up compartments of the Mir orbital station, elevates slightly the noise level during operation and provides the highly effective purification of gaseous medium from dust and microorganisms. It allows us to conclude that an application of the Potok 150M facility aboard operational station shows promise.