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This paper presents a detailed model of cluster formation from a supersaturated atomic vapor in an inert buffer gas. The population balance equations for the cluster size distribution are based on the Smoluchowski coagulation equation and take into account (i) convective diffusion of clusters, (ii) cluster loss to walls of an aggregation chamber, and (iii) formation of fractal-like aggregates. The model predictions are confronted to experimental observations, and they agree with experimental data on Cu particle formation in NC200-UHV nanocluster source. The model can be used as an aid in tuning the experimental parameters for attaining a desired nanoparticle size distribution.

This paper concentrates on the deformation behavior of amorphous diamondlike carbon composite materials. Combined nanoindentation and ex situ cross-sectional transmission electron microscopy investigations are carried out on TiC/a-C nanocomposite films, with and without multilayered structures deposited by pulse dc magnetron sputtering. It is shown that by controlling the distribution of nanocrystallites forming nanoscale multilayers, the system can be used as a "microstructural ruler" that is able to distinguish various deformation patterns, which can be hardly detected otherwise in a homogeneous structure. It is shown that rearrangement of nanocrystallites and displacement of a-C matrix occur at length scales from tens of nanometer down to 1 nm. At submicrometer scale homogeneous nucleation of multiple shear bands has been observed within the nanocomposites. The multilayered structure in the TiC/a-C nanocomposite film contributes to an enhanced toughness.

In this paper, the influence of the viscoelastic properties of rubber substrate on the tribological behavior of DLC film-coated alkyl acrylate rubber is studied. The mechanical behavior of the rubber was first characterized by creep experiments using spherical indentations. The results were adjusted using a delayed elasticity model, and a numerical simulation of the indentation of the sliding counterpart ball during the tribotest was carried out. The results show a progressive increase of the contact depth, which is in agreement with the experimental observations. (C) 2011 American Institute of Physics. [doi:10.1063/1.3665443]

In this paper it is reported for the first time that the material properties of hydrogenated amorphous‐silicon films deposited from a pure silane plasma can be improved by a low‐dose fluorine implantation. It is shown that the field‐effect density of states is reduced after implantation and appropriate annealing. The implanted material shows a better photostability as well as a better resistance against prolonged electric field application and against exposure to temperatures above deposition temperature.

In this paper we consider the one-dimensional system of a dielectric slab with one type of mobile ions in it, placed between two blocking electrodes. We present an analytical solution for the transient ionic displacement current, neglecting space-charge effects only. The theoretical results show good agreement with experimental results on Na+, Li+, and K+ ion transport in the oxide of metal-SiO2-Si structures.

In this paper we consider the reconstruction of a weak amplitude-phase object. We mean by this reconstruction of the wave function in a plane directly behind the object. The program is carried through with the aid of two measurements of the contrast, corresponding to different values of the defocusing.

We note several major inconsistencies in the cited paper.