Possible properties of positron states in physics and chemistry of a surface and in semiconductor nanotechnologies

Abstract

ABSTRACT:The possibilities of positron beam annihilation spectroscopy for research quantum dots, quantum wells, quantum wires in chemistry and physics of surface and semiconductor nanotechnologies are discussed. The relations between the basic characteristics of positron annihilation this states and parameters of these structures were obtained. © 2007 Wiley Periodicals, Inc. Int J Quantum Chem 107: 2844 -2848, 2007 Key words: positron; positronium; annihilation; ND-dimensional states; quantum dots; quantum wires; quantum wells; super-and nanostructures; surface V arious physical methods of modern nanotechnology of microelectronics, in particular method of positrons annihilation [1-6], can be used for obtaining and researching low-dimensional systems (such as quantum wells, quantum wires, and quantum dots-nanostructures, sized from fractions up to several tens of nanometers that are substrate surface fixed). It gives an opportunity to choose optimum conditions of obtaining and operating with nanomaterials used for manufacturing of LIS, VLSI, MOS-devices, and other semiconductor devices based on silicon and other semiconductor materials. At the same time there rises a problem of investigation of positron properties and especially positronium states in these semiconductor nanometric sized objects. Earlier it has been shown [1][2][3] that quantum dots, quantum wells, quantum wires, and many other things in chemistry of surface and nanotechnologies, superatoms of various nature de-