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Tytuł:
Effects of the microcrack shape, size and direction on the poroelastic behaviors of a single osteon: a finite element study
Autorzy:
Cen, H-P.
Wu, X-G.
Yu, W-L.
Liu, Q-Z.
Yia, Y-M.
Powiązania:
https://bibliotekanauki.pl/articles/306642.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
poroelastyczność
mikropęknięcie
elementy skończone
osteon
poroelasticity
microcrack
finite element
Opis:
In this work, a finite element study is proposed by using the Comsol Multiphysics software to evaluate the effects of microcrack shape, size and direction on the poroelastic behaviors of a single osteon. Methods: This finite element model is established by using the Comsol Multiphysics software, and we just focus on the comparison of the influences of those microcrack geometric parameters on the osteonal fluid pressure and velocity. Results: The results show that: (1) microcracks in the osteon wall can induce a release of the fluid pressure, but enlarge the velocity in this region; (2) equal-area microcrack with ellipsoid-like shape produced a larger fluid pressure and velocity fields in the osteon than that of rectangular shape; (3) in the elliptic microcracks, the longer of the length (major semi-axis) induces a smaller fluid pressure and velocity amplitudes, whereas the width (minor axis) has little effect; (4) the direction of the microcracks (major axial direction) has an limited influence area around about 1/15 of the osteon cross-sectional area. Conclusions: This model permits the linking of the external loads and microcracks to the osteonal fluid pressure and velocity, which can be used for other purpose associate microcracks with the mechanotransduction and bone remodeling.
Źródło:
Acta of Bioengineering and Biomechanics; 2016, 18, 1; 3-10
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acoustical Assessment of Automotive Mufflers Using FEM, Neural Networks, and a Genetic Algorithm
Autorzy:
Chang, Y.-C.
Chiu, M.-C.
Wu, M.-R.
Powiązania:
https://bibliotekanauki.pl/articles/177901.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
acoustics
finite element method
genetic algorithm
muffler optimization
polynomial neural network model
Opis:
In order to enhance the acoustical performance of a traditional straight-path automobile muffler, a multi-chamber muffler having reverse paths is presented. Here, the muffler is composed of two internally parallel/extended tubes and one internally extended outlet. In addition, to prevent noise transmission from the muffler’s casing, the muffler’s shell is also lined with sound absorbing material. Because the geometry of an automotive muffler is complicated, using an analytic method to predict a muffler’s acoustical performance is difficult; therefore, COMSOL, a finite element analysis software, is adopted to estimate the automotive muffler’s sound transmission loss. However, optimizing the shape of a complicated muffler using an optimizer linked to the Finite Element Method (FEM) is time-consuming. Therefore, in order to facilitate the muffler’s optimization, a simplified mathematical model used as an objective function (or fitness function) during the optimization process is presented. Here, the objective function can be established by using Artificial Neural Networks (ANNs) in conjunction with the muffler’s design parameters and related TLs (simulated by FEM). With this, the muffler’s optimization can proceed by linking the objective function to an optimizer, a Genetic Algorithm (GA). Consequently, the discharged muffler which is optimally shaped will improve the automotive exhaust noise.
Źródło:
Archives of Acoustics; 2018, 43, 3; 517-529
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructure of the Pulsed Laser Deposited LaSrCuO Films
Autorzy:
Cieplak, M. Z.
Abal'oshev, A.
Zaytseva, I.
Berkowski, M.
Guha, S.
Wu, Q.
Powiązania:
https://bibliotekanauki.pl/articles/2046751.pdf
Data publikacji:
2006-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.55.-a
68.55.Jk
68.37.Ps
Opis:
The X-ray diffraction and atomic force microscopy are used to examine the microstructure of La$\text{}_{1.85}$Sr$\text{}_{0.15}$CuO$\text{}_{4}$ films grown by pulsed laser deposition on LaSrAlO$\text{}_{4}$ substrates. The films grow with different degrees of built-in strain, ranging from a large compressive to a large tensile in-plain strain. The tensile strain cannot be attributed to a substrate-related strain. The possible origins of the tensile strain are discussed.
Źródło:
Acta Physica Polonica A; 2006, 109, 4-5; 573-576
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coating of LiBH4 and Its Effect on the Decomposition of RDX and AP
Autorzy:
Ding, X.
Shu, Y.
Chen, Z.
Liu, N.
Gou, B.
Zhang, J.
Wu, M.
Xie, G.
Dang, T.
Powiązania:
https://bibliotekanauki.pl/articles/358086.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
coating
hydride
additive
hygroscopicity
DSC
Opis:
The novel fuel additive LiBH4 was introduced as an energetic component for its outstanding hydrogen content, perfect burning performance and high reactivity. In order to limit the hygroscopicity and to improve the stability in the air, LiBH4 was coated on the surface with wax and polyester carbonate. The final product was characterized by scanning electron microscopy (SEM), X-ray photoelectron energy spectroscopy (XPS) and Raman spectroscopy, while the stability in air was investigated by regular checking of variations in weight. The results show that a uniform coating layer was formed on the surface of the LiBH4, and the coverage was estimated from the boron content as approximately 82%. A healing effect was confirmed on defective surfaces exposed to air; the coating layer improves the relative stability by 50.7%. Furthermore, LiBH4 as an additive to promote the thermal decomposition of 1,3,5-trinitro-1,3,5-trazinane (RDX) and ammonium perchlorate (AP) was explored by differential scanning calorimetry (DSC), in which the catalytic effects of pure LiBH4 and coated LiBH4 were compared, and indicated that the coating does not decrease the reactivity of LiBH4. It is suggested that surface coating with some inert materials is a simple and effective method for improving the storage and performance of LiBH4, while ensuring its reactivity.
Źródło:
Central European Journal of Energetic Materials; 2017, 14, 1; 134-151
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in the polarization states of random electromagnetic vortex beams propagating in biological tissues
Autorzy:
Duan, M.
Wu, Y.
Su, N.
Powiązania:
https://bibliotekanauki.pl/articles/174047.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
random electromagnetic vortex beam
biological tissue
state of polarization
Opis:
The changes in the on-axis polarization state of random electromagnetic Gaussian Schell-model vortex beams propagating in biological tissues have been studied. In different media propagation, the bigger Cn2 is, the earlier the appearance of the inflexion points in the on-axis degree of the polarization P(0, 0, z) is. As the propagation distance increases, the values of the on-axis orientation angle θ(0, 0, z) undergo several processes: at the beginning they are positive, then gradually increase to the maximum, jump to a negative value, finally tend to a fixed value. The bigger Cn2 corresponds to previous jumping position. In the entire propagation, the values of the on-axis ellipticity ε(0, 0, z) are larger than the initial one. There exists a phenomenon that the values of P(0, 0, z), θ(0, 0, z) and ε(0, 0, z) keep their extremes in a length of propagation distances for the far infrared beams. The maximum of P(0, 0, z) is the smallest and the jumping range of θ(0, 0, z) is the largest for the ultraviolet beams. Compared with σyy > σxx, the changes in magnitudes in P(0, 0, z) are more obvious when σyy < σxx, the changes in θ(0, 0, z) are just the reverse for σyy < σxx.
Źródło:
Optica Applicata; 2018, 48, 2; 297-309
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Processing Techniques on Mechanical Properties and Impact Initiation of an Al-PTFE Reactive Material
Autorzy:
Feng, B.
Fang, X.
Li, Y.-C.
Wu, S.-Z.
Mao, Y.-M.
Wang, H.-X.
Powiązania:
https://bibliotekanauki.pl/articles/358654.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
Al-PTFE
reactive materials
quasi-static compression
impact initiation
Opis:
Reactive materials (RMs) or impact-initiated materials have received much attention as a class of energetic materials in recent years. To assess the influence of processing techniques on mechanical properties and impact initiation behaviors of an Al-PTFE reactive material, quasi -static compression tests and drop-weight tests were performed. Scanning electron microscopy (SEM) was used to identify the characteristics of the interior microstructures of the Al-PTFE samples. A sintering process was found to transform Al-PTFE from a brittle to a ductile material with an increased elasticity modulus (from 108-160 MPa to 256-336 MPa) and yield stress (from 12-16 MPa to 19-20 MPa). Increasing the molding pressure from 36 MPa to 182 MPa increased the elastic modulus of all Al-PTFE samples and also the yield stress of unsintered ones. Unsintered samples in general required less energy to initiate than sintered ones. As the molding pressure increased, the impact initiation energy for sintered Al-PTFE fell from 96 J to 68 J, whereas the initiation energy for unsintered Al-PTFE rose from 68 J to 85 J. PTFE nanofiber networks observed in sintered samples formed under the higher molding pressures could contribute to the opposite trends observed in the impact initiation energy of unsintered and sintered Al-PTFE samples.
Źródło:
Central European Journal of Energetic Materials; 2016, 13, 4; 989-1004
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Advanced Characterization of Material Properties on the Nanometer Scale Using Atomic Force Microscopy
Autorzy:
Fenner, M.
Wu, S.
Yu, J.
Huber, H.
Kienberger, F.
Powiązania:
https://bibliotekanauki.pl/articles/1490089.pdf
Data publikacji:
2012-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
77.55.-g
07.79.-v
68.37.Ps
68.37.Uv
07.57.Pt
Opis:
We report recent advances in material characterization on the nanometer scale using scanning microwave microscopy. This combines atomic force microscopy and a vector network analyzer using microwave tip sample interaction to characterize dielectric and electronic material properties on the nanometer scale. We present the methods for calibration as well as applications. Scanning microwave microscopy features calibrated measurements of: (1) capacitance with attofarad sensitivity. For calibration a well characterized array of capacitors (0.1 fF to 10 fF) is used. The method is applied to determine the dielectric properties of thin organic films, (2) Semiconductor dopant density. Calibration is performed by imaging the cross-section of a standard sample with differently doped layers (dopant stair case) from $10^{16}$ atoms/$cm^3$ to $10^{20}$ atoms/$cm^3$.
Źródło:
Acta Physica Polonica A; 2012, 121, 2; 416-419
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The ascorbate metabolism as a target for the breeding of stress resistant rice
Autorzy:
Frei, M.
Holler, S.
Ueda, Y.
Wu, L.
Powiązania:
https://bibliotekanauki.pl/articles/80002.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
ascorbate
abiotic stress
plant tissue
oxidative stress
rice
stress resistance
zinc deficiency
tropospheric ozone
iron toxicity
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tetragonal or hexagonal symmetry in modeling of failure criteria for transversely isotropic materials
Autorzy:
Ganczarski, A.
Adamski, M.
Powiązania:
https://bibliotekanauki.pl/articles/386235.pdf
Data publikacji:
2014
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
transverse isotropy
tetragonal and hexagonal symmetry
Tsai-Wu criterion
izotropia poprzeczna
symetria
kryteria Tsai-Wu
Opis:
Present work deals with modeling of failure criteria for transversely isotropic materials. Analysis comprises two classes of symmetry: Tsai-Wu tetragonal and new Tsai-Wu based hexagonal. Detail analysis of both classes of symmetry with respect to their advantages as well as limitations is presented. Finally, simple comparison of differences between limit curves corresponding to cross sections by planes of transverse isotropy, orthotropy and shear plane is done.
Źródło:
Acta Mechanica et Automatica; 2014, 8, 3; 125-128
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A CTS pump with a crossed-coupled output for higher conversion efficiency
Autorzy:
Hsieh, Z. H.
Huang, N. X.
Shiau, M. S.
Wu, H. C.
Yang, S.-Y.
Liu, D.-G.
Powiązania:
https://bibliotekanauki.pl/articles/397847.pdf
Data publikacji:
2010
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
DC-DC przetwornice
CTS ładunek pompy
sprzężenie skrośne ładunku pompy
DC-DC converter
CTS charge pump
cross coupled charge pump
Opis:
In this paper, a novel switching-capacitor DC-DC voltage converter with higher efficiency will be presented. This circuit was designed by modifying the output stage of the conventional static charge-transfer-switch (CTS) charge pump in a cross-coupled configuration. In this design, a control scheme to overcome both the reverse charge sharing and the threshold drops in the CTS pump was also employed. In this study, the capacitances for all the pumping capacitors were selected the same as 0.1 μF. With this design, our circuit can operate with a clock rate up to 1 MHz. The performance of this circuit was first evaluated by simulation by HSPICE with the 0.35-μm technology of TSMC. The results showed that this circuit can pump the low input of 1.5V nearly 5 times at the output. The conversion gain can be around 95%. The performance of the real chip manufactured by TSMC was measured and will be compared with the simulation results.
Źródło:
International Journal of Microelectronics and Computer Science; 2010, 1, 1; 9-14
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An EL-model based passivity control of four-phase interleaved PFC
Autorzy:
Hua-Wu, L.
Hong-Xing, M.
Jian-Feng, J.
Xi-Jun, Y.
Xing-Hua, Y.
Powiązania:
https://bibliotekanauki.pl/articles/140472.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
four-phase interleaved PFC
passivity based control
damping injection
current sparing
Opis:
With the continuous increase of output power ratings, multi-phase (multichannel) interleaved power factor corrector (IPFC) is gradually employed in domestic and commercial inverter air-conditioners. IPFC can solve several main problems, such as power rating increase, power device selection, input current ripple reduction as well as inductor on-board mounting. But for a multi-phase IPFC, the key problem is that it should show rapid dynamic responds and good current sharing capability, so in this paper the aim is to improve the dynamic performance and current sharing capability by means of passivity control theory. Considering the power circuit topology of a four-phase IPFC, an EL (Euler-Lagrange) mathematical model is established when the IPFC operates in continuous conduction mode (CCM). Then the passivity of the four-phase IPFC is proved, and the passivity-based controller using the state variables feedback and damping injection method is designed. The proposed control scheme, which is easy to control and needs no proportion integral controller, has strong robustness on disturbance from singlephase AC input voltage, the load as well as the parameters of the employed devices. Even in wide-range load condition, the mains current has a fast dynamic response and the average output voltage almost keep unchanged. As a result, the main functions of the four-phase IPFC are implemented including nearly unitary power factor and constant DC output voltage. Meanwhile, the four-phase IPFC acquires an excellent current sparing effect after using passivity-based controller. The above analysis has been proved with simulated results by means of MATLAB/SIMULINK and experimental results, showing that the passivity-based IPFC controller has superior performances and feasibility.
Źródło:
Archives of Electrical Engineering; 2013, 62, 4; 613-628
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reduced stress and fluctuation for the integrated α-Si TFT gate driver on the LCD
Autorzy:
Huang, N. X.
Shiau, M. S.
Wu, H.-C.
Sun, R. C.
Liu, D.-G.
Powiązania:
https://bibliotekanauki.pl/articles/397883.pdf
Data publikacji:
2010
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
sterownik bramy
fluktuacja hałasu
wpływ naprężenia
system w panelu
gate driver
fluctuation noise
stress effect
system on panel (SoP)
Opis:
In this paper, an integrated TFT gate driver was designed on the glass substrate not only to decrease the fluctuation at the output, but also to reduce the stress effect on the pull-down branches. The fluctuation in the voltage at the output transistor was attributed to the coupled clocks through the parasitic capacitors in the TFTs. In this study, the voltage gating the pull-down braches was reduced for longer operational lifetime. This scheme was investigated by simulation by Smart-SPICE with an α-Si TFT model from Wintek Inc. at level 35.
Źródło:
International Journal of Microelectronics and Computer Science; 2010, 1, 3; 311-315
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability allocation using probabilistic analytical target cascading with efficient uncertainty propagation
Alokacja niezawodności z wykorzystaniem probabilistycznej metody analitycznego kaskadowania celów zapewniająca wydajną propagację niepewności
Autorzy:
Jiang, G.
Zhu, M.
Wu, Z.
Powiązania:
https://bibliotekanauki.pl/articles/301967.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
optymalna alokacja niezawodności
dekompozycja hierarciczna
probabilistyczna metoda analitycznego kaskadowania celów
propagacja niepewności
optimal reliability allocation
hierarchical decomposition
probabilistic analytical target cascading
uncertainty propagation
Opis:
Analytical target cascading (ATC) provides a systematic approach in solving reliability allocation problems for large scale system consisting of a large number of subsystems, modules and components. However, variability and uncertainty in design variables (e.g., component reliability) are usually inevitable, and when they are taken into consideration, the multi-level optimization will be very complicated. The impacts of uncertainty on system reliability are considered in this paper within the context of probabilistic ATC (PATC) formulation. The challenge is to reformulate constraints probabilistically and estimate uncertainty propagation throughout the hierarchy since outputs of subsystems at lower levels constitute inputs of subsystems at higher levels. The performance measure approach (PMA) and the performance moment integration (PMI) method are used to deal with the two objectives respectively. To accelerate the probabilistic optimization in each subsystem, a unified framework for integrating reliability analysis and moment estimation is proposed by incorporating PATC with single-loop method. It converts the probabilistic optimization problem into an equivalent deterministic optimization problem. The computational efficiency is remarkably improved as the lack of iterative process during uncertainty analysis. A nonlinear geometric programming example and a reliability allocation example are used to demonstrate the efficiency and accuracy of the proposed method.
Analityczne kaskadowanie celów (ATC) stanowi systematyczne podejście do rozwiązywania zagadnień alokacji niezawodności dotyczących systemów wielkoskalowych składających się z dużej liczby podsystemów, modułów i elementów składowych. Jednakże zmienność i niepewność zmiennych projektowych (np. niezawodności elementów składowych) są zazwyczaj nieuniknione, a gdy weźmie się je pod uwagę, optymalizacja wielopoziomowa staje się bardzo skomplikowana. W prezentowanym artykule, wpływ niepewności na niezawodność systemu rozważano w kontekście formuły probabilistycznego ATC (PATC). Wyzwanie polegało na probabilistycznym przeformułowaniu ograniczeń oraz ocenie propagacji niepewności w całej hierarchii, jako że wyjścia podsystemów na niższych poziomach stanowią wejścia podsystemów na poziomach wyższych. Cele te realizowano, odpowiednio, przy użyciu metody minimum funkcji granicznej (performance measure approach, PMA) oraz metody całkowania momentów statystycznych funkcji granicznej (performance moment integration, PMI). W celu przyspieszenia probabilistycznej optymalizacji w każdym podsystemie, zaproponowano ujednolicone ramy pozwalające na integrację analizy niezawodności z oceną momentów statystycznych poprzez połączenie PATC z metodą jednopoziomową (pojedynczej pętli, single-loop method). Zaproponowana metoda polega na przekształceniu probabilistycznego zagadnienia optymalizacyjnego na deterministyczne zagadnienie optymalizacyjne. Zwiększa to znacznie wydajność obliczeniową w związku z brakiem procesu iteratywnego podczas analizy niepewności. Wydajność i trafność proponowanej metody wykazano na podstawie przykładów dotyczących programowania nieliniowego geometrycznego oraz alokacji niezawodności.
Źródło:
Eksploatacja i Niezawodność; 2012, 14, 4; 270-277
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A field trial of recombinant Schistosoma japonicum paramyosin as a potential vaccine in naturally-infected water buffaloes
Autorzy:
Jiz II, M.A.L.
Mingala, C.N.
Lopez, I.F.M.
Chua, M.
Gabonada Jr., F.G.
Acosta, L.P.
Wu, H.
Kurtis, J.D.
Powiązania:
https://bibliotekanauki.pl/articles/6326.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Parazytologiczne
Opis:
The overall aims of this project are to assess the safety and immunogenicity of the Schistosoma japonicum vaccine paramyosin among water buffaloes residing in endemic areas. The study was conducted in four villages in Leyte, the Philippines, an area highly endemic for schistosomiasis japonica. One hundred and fifteen (N=115) animals provided baseline stool samples for coprologic examination, with preliminary results using FLOTAC showing a 10% prevalence of schistosomiasis. Forty-nine (N=49) animals consented to treatment with 25 mg/kg Praziquantel, and 40, 36 and 32 animals consented to the first, second and third dose of the paramyosin vaccine, respectively. The safety trial involved the first 20 animals and included skin testing, vaccination, anaphylaxis monitoring, as well as hematology and serum chemistry analysis. Skin tests revealed that only three out of 20 animals exhibited redness at the injection site, with none greater than 1 cm. None of the animals exhibited anaphylaxis, and all hematology and serum chemistry markers were within normal range or were similar to pre-vaccination levels. None of the 40 animals administered with the first dose exhibited anaphylaxis, nor any of the subsequent vaccine doses. Immunogenicity assessment of sera collected prior to every vaccination and one month after the last dose showed that the paramyosin vaccine induced robust antibody responses to all animals, as assessed by ELISA. The cytokine levels of whole blood culture supernatants will be further assessed. Our findings demonstrate that the S. japonicum paramyosin vaccine is a safe, well-tolerated and immunogenic treatment among water buffalos residing in endemic areas.
Źródło:
Annals of Parasitology; 2016, 62, 4
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High-Coercivity FePt Nanoparticle Assemblies Embedded in Oxide-Matrix by Atomic Layer Deposition
Autorzy:
Kong, J.
Li, A.
Gao, M.
Yan, Q.
Wu, D.
Powiązania:
https://bibliotekanauki.pl/articles/1399662.pdf
Data publikacji:
2013-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Vv
75.75.Cd
75.50.Bb
75.50.Ss
Opis:
Self-assembled face-centered cubic FePt nanoparticles were embedded into the oxide capping layer using the atomic layer deposition technology. The effect of the oxide-matrix layer on the structure, mono-dispersibility, and magnetic properties of the FePt/oxide composite thin films was investigated. Experimental results suggest that the protection of the oxide-matrix capping layer can effectively inhibit the grain growth and particle aggregation, and preserve the ordered domains of the FePt nanoparticles during the L 1_0 ordering transition through annealing. The combination of the atomic layer deposition capping layer and self-assembled FePt nanoparticles provides a new potential approach to fabricate the ultrahigh-density magnetic recording media.
Źródło:
Acta Physica Polonica A; 2013, 123, 2; 173-176
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 52

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