Nitrogen-vacancy (NV) color centers in diamond are excellent quantum sensors possessing high sensitivity and nano-scale spatial resolution. Their integration in photonic structures is often desired, since it leads to an increased photon emission and also allows the realization of solid-state quantum technology architectures. Here, we report the fabrication of diamond nano-pillars with diameters up to 1000 nm by electron beam lithography and inductively coupled plasma reactive ion etching in nitrogen-rich diamonds (type Ib) with [100] and [111] crystal orientations. The NV centers were created by keV-He ion bombardment and subsequent annealing, and we estimate an average number of NVs per pillar to be 4300 ± 300 and 520 ± 120 for the [100] and [111] samples, respectively. Lifetime measurements of the NVs’ excited state showed two time constants with average values of τ1 ≈ 2 ns and τ2 ≈ 8 ns, which are shorter as compared to a single color center in a bulk crystal (τ ≈ 10 ns). This is probably due to a coupling between the NVs as well as due to interaction with bombardment-induced defects and substitutional nitrogen (P1 centers). Optically detected magnetic resonance measurements revealed a contrast of about 5% and average coherence and relaxation times of T2 [100] = 420 ± 40 ns, T2 [111] = 560 ± 50 ns, and T1 [100] = 162 ± 11 μs, T1 [111] = 174 ± 24 μs. These pillars could find an application for scanning probe magnetic field imaging.

External Thermal Insulation Composite Systems (ETICS) are widely used in the northern hemisphere in retrofitted and new external walls. The outer layer of ETICS is usually a thin layer of plaster. The effects of temperature and humidity on the hygrothermal behaviour and mechanical properties of thin plasters have been quantified by conducting several experiments to determine the possibility of crack formation. Combinations of plasters using four types of binders are tested: mineral, polymer, silicate and silicone. Plasters are tested as four systems consisting of a base coat, a glass-fibre reinforcement mesh and a finishing coat. Sorption curves of the plaster systems are determined to gather data for numerical simulations. The coefficients of thermal and hygroscopic expansion are determined. The modulus of elasticity and tensile strength of four different plasters are measured to allow the calculation of crack formation in ETICS and suggest the distances between the deformation joints. The method demonstrated in this paper makes it possible to calculate the crack formation caused by the temperature and moisture shrinkage in the thin exterior plaster of ETICS.

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Научно-технический вестник информационных технологий, механики и оптики, Аннотация Предмет исследования. Исследованы характеристики полимерных композитов на основе промышленно выпускаемого поливинилхлорида и биополимерного наполнителя -пектина в различных массовых соотношениях (1, 5 и 10 масс.%) с плазмохимической обработкой для применения в качестве деградируемого материала упаковки. Метод. Наполненные композитные пленки получены методом вальцевания при температуре 165-170 ºС с предварительным смешением всех компонентов композиции на лопастной мешалке со скоростью перемешивания 6000 об/мин в течении 4 минут. Образцы поливинилхлоридных пленок обработаны низкотемпературным плазмохимическим травлением в течение 5 и 10 мин в среде аргон:кислород. Пленки изучены методами инфракрасной Фурье-спектроскопии и оптической микроскопии в зависимости от содержания наполнителя и времени травления. Основные результаты. Экспериментально показано, что низкотемпературная плазмохимическая обработка приводит к деградации материала на основе поливинилхлорида и пектина. Максимальные структурные изменения наблюдаются для композиции с содержанием пектина 1 масс.%, что может быть объяснено в рамках теории малых добавок. Практическая значимость. Полученные полимерные композиты могут найти применение в качестве материала для упаковки, деградирующей при утилизации и обладающей меньшим сроком жизни изделия. Плазмохимическая обработка может представлять интерес в качестве метода обработки промышленно выпускаемых синтетических полимерных материалов перед их утилизацией. Ключевые слова ПВХ, полимерная пленка, пектин, биодеградация, плазмохимическая обработка 30.07.17, accepted 31.08.17 doi: 10.17586/2226-1494-2017-17-5-834-840 Article in Russian For citation: Volkova K.V., Trotsenko I.V., Uspenskaya M.V., Balya V.K., Sivtsov E.V., Belukhichev E.V. Study of plasmochemical processing effect on the properties of polymer films based on polyvinylchloride. Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 2017, vol. 17, no. 5, pp. 834-840 (in Russian). doi: 10.17586/2226-1494 Abstract Subject of Research. The paper deals with characteristics study of polymer composites based on commercially available polyvinyl chloride and biopolymer filler pectin in various weight ratios (1.5 and 10 mass%) for the usage as biodegradable packaging. Method. Biopolymer composite films were obtained by rolling at the temperature of 165-170 ℃ and pre-mixing of all composition components with a paddle stirrer at a stirring speed of 6000 rpm for four minutes. The introduction of natural materials into the polymer matrix facilitates the decomposition of plastics during disposal, and the processing of STUDY OF PLASMOCHEMICAL PROCESSING EFFECT ON THE PROPERTIES OF POLYMER FILMS

*The influence of bentonite and pectin as PVC fillers taken in the amount up to 10% is considered on thermal stability, processability, strength, elasticity and surface properties of PVC films obtained by rolling used as a simplified model of calendering. The effect of heat treatment on the films colour was estimated when colour was used as a parameter indicating the degree of degradation by mechanism of formation of sequences of polyconjugated double bonds. To solve the problem of suitability of bentonite and pectin as fillers optical methods of investigation, thermomechanical analysis, thermogravimetry, DSC were used. Recommendations on application of bentonite and pectin in PVC formulations were given.