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[en] A significant laser-induced piezooptical response in novel CdCl0.5J 0.5 nanolayers is obtained under the influence of laser illumination. The maximal piezo-optic response is observed for off-diagonal piezooptical tensor components. The layered structure allowed to obtain the thin specimens of thickness up to 1 nm with mirror-like surfaces. The observed studies show huge dependence of the piezooptics on the nanolayer thickness and the photoinduced beam power density. The effect is completely reversible. This fact allows proposing a new type of nanomaterials, which have significant benefits with respect to the other types of piezooptical materials (i.e. a possibility to use them in the laser operated devices). (paper)
[en] In the book of abstracts there are the theses of the IX Annual conference of Nanotechnological Society of Russia which took place on the 05.04.2018 in Moscow. The consideration is given to the nanostructured metals and alloys and coatings on their base, nanocomposite polymers. The questions of nanotechnologies use in microelectronics, instrument engineering, fuel-and-energy complex as well as in biotechnology are also discussed
[ru]В сборнике представлены тезисы IX ежегодной конференции Нанотехнологического общества России, проходившей 05.04.2018 в Москве. Рассмотрены наноструктурированные металлы и сплавы и покрытия на их основе, нанокомпозитные полимеры. Обсуждаются вопросы использования нанотехнологий в микроэлектронике, приборостроении, топливно-энергетическом комплексе, а также в биотехнологии
[en] The functionalization of fine primary particles by atomic layer deposition (particle ALD) provides for nearly perfect nanothick films to be deposited conformally on both external and internal particle surfaces, including nanoparticle surfaces. Film thickness is easily controlled from several angstroms to nanometers by the number of self-limiting surface reactions that are carried out sequentially. Films can be continuous or semi-continuous. This review starts with a short early history of particle ALD. The discussion includes agitated reactor processing, both atomic and molecular layer deposition (MLD), coating of both inorganic and polymer particles, nanoparticles, and nanotubes. A number of applications are presented, and a path forward, including likely near-term commercial products, is given.
[en] This paper studies the surface instability of an elastic thin solid film lying on a rigid substrate and subjected to van der Waals-like surface interactions. The effect of film-substrate interfacial slippage is accounted for by using a simplified linear cohesive interface model. It is found that the interfacial slippage generally plays a destabilizing role in the surface instability of the thin film. For highly compressible films with Poisson's ratio smaller than 0.25, the surface wrinkling behaviour previously inconceivable in the case of a perfectly bonded interface is now feasible if film-substrate interface slipping is permitted. In addition, our linear perturbation analysis shows that the critical conditions for the onset of surface instability can be modulated by adjusting the slippery stiffness of the interface. The result might be helpful for developing novel techniques to create micro-/nanosized surface patterns.
[en] Forming processes of thin-film fluoropolymer coating in the HF discharge reactor on the surface at various technological modes of deposition are considered. The molecular and structural characteristics of the films are studied. Areas of optimum technological modes of producing of nano-sized and thin fluoropolymer films with better electro physical properties are determined. (paper)
[en] Growing demand for efficient, high-resolution surface processing has led to the emergence of a rich variety of plasma-based technologies underpinned by an equally wide range of technological setups, each optimized for a specific task, e.g. highly-selective removal of surface layers, precision surface functionalization and nanoscale structuring, or deposition of thin films and nanostructures. However, with increasing device integration and miniaturization, flexible processing technologies capable of delivering complex treatments, such as the growth of complex hierarchical single- and multi-component nanostructures within a single processing environment are highly desired. Yet, such systems are difficult to achieve due to the necessity of the in-process float, and limiting technological capabilities of individual plasma sources and treatment setups. Using a novel flexible platform as an example, this review presents a careful analysis of the physical principles, capabilities and limitations of existing plasma technologies with an ultimate aim to define key principles for the development of prospective flexible platforms for complex plasma-enabled material synthesis and processing. Such a platform would have a significant potential to increase the effectiveness of plasma technology with respect to productivity, material and energy consumption, cost and turnaround time.
[en] Highlights: • Shear horizontal wave dispersion in nanolayers with surface effects is examined. • Wave velocity is dependent on the layer thickness and surface elastic constants. • Surface elastic constants can be analytically derived from the wave velocity. - Abstract: In this work, the shear horizontal (SH) wave dispersion in two dissimilar nanolayers is investigated by using the surface elasticity theory in which the surface effects are featured by surface elastic constants. It is found that the SH wave dispersion shows distinct dependence on the nanolayer thickness as well as the surface elastic constants. The larger the surface elastic modulus and/or the smaller the thickness, the higher the phase velocity. In particular, as the wave frequency approaches zero, the analytical relation between the phase velocity in the first mode dispersion and the surface elastic constants is deduced. Thereby, a facile method is suggested to determine the surface elastic constants from the phase velocity of SH waves scattered in nanolayers.
[en] Highlights: • Well-tailored interlocked interfaces were fabricated through a cost-effective process such as nanoscale molding and electrodeposition. • It was predicted that well-tailored interlocked interfaces is possible to maximize the output power due to the increment of contact area from simulation. • Triboelectric nanogenerator with well-tailored interlocked interface exhibited the highest output power compared with 3 different types of interfaces. • For charging and discharging of capacitor, triboelectric nanogenerator with well-tailored interlocked interfaces showed the superior characteristics compared to that with smooth interface. We report a facile and cost-effective route for fabricating highly efficient triboelectric energy harvesters via formation of artificially well-tailored interlocked interface with a nanostructured Ni electrode and polydimethylsiloxane (PDMS). The interlocked interface formed between the nano-pillar Ni electrode and nano-pillar PDMS composite thin film effectively enhanced the triboelectricity of a triboelectric nanogenerator (TENG) by increasing the surface contact area and contact time, related to the frictional forces. The output power of four different kinds of TENGs was evaluated to confirm the effect of the surface morphology, especially the interlocked interface. A dramatic enhancement of the output voltage (~100 V) was observed with a current of up to ~23 μA. The effectiveness of the interlocked TENG (i-TENG) was also demonstrated by the greater efficiency for charging a capacitor compared with the flat-to-flat contact TENG (flat TENG).
[en] It is a well-known fact that bone scaffold topography on micro- and nanometer scale influences the cellular behavior. Nano-scale surface modification of scaffolds allows the modulation of biological activity for enhanced cell differentiation. To date, there has been only a limited success in printing scaffolds with micro- and nano-scale features exposed on the surface. To improve on the currently available imperfect technologies, in our paper we introduce new hybrid technologies based on a combination of 2D (nano imprint) and 3D printing methods. The first method is based on using light projection 3D printing and simultaneous 2D nanostructuring of each of the layers during the formation of the 3D structure. The second method is based on the sequential integration of preliminarily created 2D nanostructured films into a 3D printed structure. The capabilities of the developed hybrid technologies are demonstrated with the example of forming 3D bone scaffolds. The proposed technologies can be used to fabricate complex 3D micro- and nanostructured products for various fields. (paper)