Organic–inorganic nanostructures for luminescent indication in the near-infrared range

Amplifying and quenching of IR luminescence of colloidal Ag₂S quantum dots were revealed to take place when they couple to organic dye molecules of 3,3′-di-(γ-sulfopropyl)-9-ethyl-4,5,4′,5′-dibenzothiacarbocyanine betaine and erytrosine pyridinium salts, respectively. The observed effects are explained as due to the formation of organic–inorganic heterostructures with different mutual arrangement of electronic states of the dyes and the quantum dots.     

Special features in calculating for the relative mass of cylinder-type throttle microcryogenic systems

Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 7, pp. 14–16, July, 1989.     

Calculation of characteristics of heat and mass transfer in a multilayer heat resistant coating

On the basis of theoretical and known experimental results, an improved mathematical model of thermochemical destruction of a multilayer thermal-protective coating is presented. Taking into account the heat transfer across the body made it possible to predict with a higher accuracy the state of a protected structure in fire conditions. The numerical results are compared with known experimental data.