Materials Literature
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Polishing-induced redeposition layer of fused silica optics seriously limits the laser damage resistance, and currently the focus of research lies in absorbing impurities. This article focuses on structure characterization of fused silica redeposition layer in nanoscale and analysis of impurities. With atomic force mi…
In asynchronous sampling, discrete Fourier transform (DFT) spectrum involves errors. Scholars have done great investigations on the correction techniques of DFT spectrum, but the errors have not been completely eliminated all along. In this paper, spectrums were examined from the principle of conservation of energy. I…
Recent reports on the fabrication of phosphorene, that is, mono- or few-layer black phosphorus, have raised exciting prospects of an outstanding two-dimensional (2D) material that exhibits excellent properties for nanodevice applications. Here, we study by first-principles calculations the adsorption of CO, CO2, NH3,…
A system of hard spheroplatelets near an impenetrable wall is studied in the low-density Onsager approximation. Spheroplatelets have optimal shape between rods and plates, and the direct transition from the isotropic to biaxial nematic phase is present. A simple local approximation for the one-particle distribution fu…
This paper considers Platonic solids/polytopes in the real Euclidean space R(n) of dimension 3 ≤ n < ∞. The Platonic solids/polytopes are described together with their faces of dimensions 0 ≤ d ≤ n - 1. Dual pairs of Platonic polytopes are considered in parallel. The underlying finite Coxeter groups are those of simpl…
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The dependences of the main mechanical characteristics of polymer-matrix composite material on the content of the structure-forming components are examined: modifying fillers, retarder of crystallization reaction and reinforcing fillers, which are injected into the composition first separately, and then simultaneously…
Actins are highly conserved proteins that are involved in various types of cell motility and are ubiquitously expressed in all eukaryotic cells. In vertebrates, three main groups of actin isoforms namely alpha, beta, and gamma have been identified. The alpha actins are found in muscles with contractile functions where…
Breadth-First Search (BFS) is widely used in many real world applications including computational biology, social networks, and electronic design automation. The combination method, using both top-down and bottom-up techniques, is the most effective BFS approach. However, current combination methods rely on trial-and-…
Uji fatik bending merupakan salah satu alat uji untuk mengetahui tingkat kelelahan suatu bahan yang akan digunakan sebagai konstruksi atau komponen yang akan menerima pembebanan . Fungsi uji fatik bending adalah menguji kekuatan patah berdasarkan beban bending yang berbeda- beda mulai dari beban rendah sampai beban ya…
Dimanganese(II) hydroxide vanadate was obtained from hydro-thermal reactions. The crystal structure of the title compound is isotypic with that of Zn2(OH)[VO4]. Three crystallographically independent Mn(2+) ions are present, one (site symmetry .m.) with a distorted trigonal-bipyramidal and two (site symmetries .m. and…
Hu et al. synthesized large-area α-MnO2 nanoflower arrays on flexible substrates, which produced a high specific capacitance with remarkable rate capability and excellent cycling stability, as shown on p. 1003.
본 연구에서는 탄소나노튜브의 전자파 차폐 성능을 향상시키고자 무전해 도금법을 이용하여 다중벽 탄소나노튜브에 니켈을 도입하였다. 니켈 도금된 다중벽 탄소나노튜브의 물리적 특성은 고분해능주사전자현미경, 열중량분석기, 표면저항측정기, 전자파 차폐능 분석기를 이용하여 분석하였다. 니켈 도금된 다중벽 탄소나노튜브의 전자파 차폐 효율은 800 MHz 영역에서 16 dB로 측정되었으며 활성화 처리된 다중벽 탄소나노튜브에 비하여 최대 1.6배 증가하였다. 또한, 평균 표면 저항 역시 $70{\Omega}/sq$ 로 활성화 처리된 다중벽 탄소나노튜브에 비하여 최대 56% 감소한 수…
Abstract Tension and compression tests were conducted on a ceramic-fiber-reinforced SiO2 aerogel (CFRSA). The material exhibits different tension and compression modulus, i.e., bi-modulus. The objective of present research is to establish guidelines for preparing shear tests of this CFRSA. Finite-element analysis (FEA…
본 연구에서는 바나듐 레독스 흐름전지의 효율을 향상시키고자 탄소펠트에 열산화 반응과 암모니아수 처리를 이용하여 질소가 도핑된 탄소펠트 전극을 제조하였다. 또한 제조된 탄소펠트 전극의 전기화학적 특성평가를 위하여 CV 실험 및 충/방전 실험을 실시하였다. 암모니아수 처리온도가 증가함에 따라 탄소펠트 표면의 질소 관능기가 증가함을 XPS를 통하여 확인하였으며, CV 측정 결과 암모니아수 처리된 탄소펠트는 열산화된 탄소펠트에 비하여 산화/환원의 반응성이 우수함을 확인하였다. 충/방전 실험결과 $300^{\circ}C$ 에서 암모니아수 처리한 탄소펠트 전극은 열산화된 탄소…
This article presents the results of the simulated irradiation with protons and alpha particles of two different geometrical models, representing a cell nucleus and its chromatin content. The characteristics of the energy deposition are studied at both micrometric and nanometric length scales. In particular, the stoch…
Introduction: Polycaprolactone (PCL) and chitosan (CS) are polymers with attractive properties (excellent biocompatibility & degradation). However their mechanical properties seperately do not satisfy the needs for cardiovascular tissue engineering. In the present work we aimed to optimize electrospinning parameters t…
The thermomechanical and rheological properties of various graphite/long‐chain branched polypropylene (PP) nanocomposites prepared by different mixing methods have been addressed in the current work. To improve the degree of dispersion of graphite throughout the PP domains, solid‐state milling was carried out and foll…
The goal of this study was to develop and test an appropriate method for the evaluation of surface quality and to identify and quantify the quality of a surface modified by 3D molding. New software was developed to evaluate the surface quality based on the identification of macroscopic defects such as cracks within a…
In this paper, the results of the study of the reduction of basic lead sulphate with a gas (CO + CO 2 ) mixture are presented. This is a secondary reaction during the reduction of lead sulphate. The change in the both lead and PbS content in the reaction products, depending on the process temperature and the compositi…