in this paper, a new model based on kinetic theory of gases and longitude oscillations of metallic nanocluster on single carbon nanotube (cnt) in addition to phononvibrations of cnt on substrate is presented to describe the growth mechanism of ultra-long cnt in chemical vapor deposition (cvd).interaction between cnt and catalyst is investigated by lennard-jones potential. simulations demonstrat...

carbon nanotubes (cnts), nowadays, are one of the important nanomaterials that can be produce with different methods such as chemical vapor deposition (cvd). growing of cnts via cvd method can be influenced by several operating parameters that can affect their quality and quantity. in this article, the effects of inlet gas mixture temperature on cnt’s local growth rate, total production, and le...

Consider a given system under regime switching whose solution grows at most polynomially, and suppose that the system is subject to environmental noise in some regimes. Can the regime switching and the environmental noise work together to make the system change significantly? The answer is yes. In this paper, we will show that the regime switching and the environmental noise will make the origi...

The growth evolution of hexagonal GaN pyramids are investigated under various growth conditions. The hexagonal GaN pyramids were grown by hot-wall metal organic chemical vapor deposition – process (hot-wall MOCVD) on a (0001) oriented GaN template. We concluded the growth of the hexagonal GaN pyramids can be divided into two different regimes defined by the adsorption kinetics of the {1101} sur...

Unified Growth Theory uncovers the forces that contributed to the existence of multiple growth regimes and the emergence of convergence clubs. It suggests that differential timing of take-offs from stagnation to growth segmented economies into three fundamental regimes: slow growing economies in a Malthusian regime, fast growing countries in a sustained growth regime, and economies in the trans...

Unified Growth Theory uncovers the forces that contributed to the existence of multiple growth regimes and the emergence of convergence clubs. It suggests that differential timing of take-offs from stagnation to growth segmented economies into three fundamental regimes: slow growing economies in a Malthusian regime, fast growing countries in a sustained growth regime, and economies in the trans...