Artículos de revistas: "STRUCTURAL INTERFACE PROPERTIES"

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Zhu, Hua. "Mechanical and fatigue properties of CFRP plate reinforced steel structural interface". Functional materials 25, n.º 4 (19 de diciembre de 2018): 759–65. http://dx.doi.org/10.15407/fm25.04.759.

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Veen, J. F. van der y H. Reichert. "Structural Ordering at the Solid–Liquid Interface". MRS Bulletin 29, n.º 12 (diciembre de 2004): 958–62. http://dx.doi.org/10.1557/mrs2004.267.

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AbstractMany processes in nature and technology are based on the static and dynamic properties of solid–liquid interfaces. Prominent examples are crystal growth, melting, and recrystallization. These processes are strongly affected by the local structure at the solid–liquid interface. Therefore, it is mandatory to understand the change in the structure across the interface. The break of the translational symmetry at the interface induces ordering phenomena, and interactions between the liquid's molecules and the atomically corrugated solid surface may induce additional ordering effects. In the past decade, new techniques have been developed to investigate the structural properties of such (deeply) buried interfaces in their natural environment. These methods are based on deeply penetrating probes such as brilliant x-ray beams, providing full access to the structure parallel and perpendicular to the interface. Here, we review the results of a number of case studies including liquid metals in contact with Group IV elements (diamond and silicon), where charge transfer effects at the interface may come into play. Another particularly important liquid in our environment is water. The structural properties of water vary widely as it is brought in contact with other materials. We will then proceed from these seemingly simple cases to complex fluids such as colloids.

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3

Sacilotti, M., P. Abraham, M. Pitaval, M. Ambri, T. Benyattou, A. Tabata, M. A. Garcia Perez et al. "Structural and optical properties of AlInAs/InP and GaPSb/InP type II interfaces". Canadian Journal of Physics 74, n.º 5-6 (1 de mayo de 1996): 202–8. http://dx.doi.org/10.1139/p96-032.

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We present a study of type II interfaces between semiconducting materials. In this type of interface the lineup of the two semiconductor band gaps has a staggered shape. The band bending at the interface depends on the doping type and concentration of the two semiconductors involved. In most cases two triangular quantum wells appear at the interface, one for the electrons in the semiconductor having the lowest conduction band edge and one in the other material for holes. In such a case, when charges are injected, the electrons and holes are separated at the interface, so that the electron/hole recombination occurs through the interface. The main characteristic of type II interfaces is that their photoluminescent (PL) intensity is very high compared with each material forming the heterojunction. This high PL intensity can be used advantageously in optoelectronic device applications. We present semiconductor pairs for which it is possible to have type II interfaces and their optical properties. We will emphasize particularly the cases of AlInAs/InP and GaPSb/InP whose low-temperature interface recombination energies are 1.2 and 0.90 eV, respectively.

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4

Kalabukhov, A., T. Claeson, P. P. Aurino, R. Gunnarsson, D. Winkler, E. Olsson, N. Tuzla et al. "Electrical and structural properties of ABO3/SrTiO3 interfaces". MRS Proceedings 1454 (2012): 167–72. http://dx.doi.org/10.1557/opl.2012.925.

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ABSTRACTElectrical transport and microstructure of interfaces between nm-thick films of various perovskite oxides grown by pulsed laser deposition (PLD) on TiO2- terminated SrTiO3 (STO) substrates are compared. LaAlO3/STO and KTaO3/STO interfaces become quasi-2DEG after a critical film thickness of 4 unit cell layers. The conductivity survives long anneals in oxygen atmosphere. LaMnO3/STO interfaces remain insulating for all film thicknesses and NdGaO3/STO interfaces are conducting but the conductivity is eliminated after oxygen annealing. Medium-energy ion spectroscopy and scanning transmission electron microscopy detect cationic intermixing within several atomic layers from the interface in all studied interfaces. Our results indicate that the electrical reconstruction in the polar oxide interfaces is a complex combination of different mechanisms, and oxygen vacancies play an important role.

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Huo, Jin-Rong, Lu Li, Hai-Xia Cheng, Xiao-Xu Wang, Guo-Hua Zhang y Ping Qian. "The structural, electronic and optical properties of Au–ZnO interface structure from the first-principles calculation". Modern Physics Letters B 32, n.º 07 (5 de marzo de 2018): 1850107. http://dx.doi.org/10.1142/s0217984918501075.

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The interface structure, electronic and optical properties of Au–ZnO are studied using the first-principles calculation based on density functional theory (DFT). Given the interfacial distance, bonding configurations and terminated surface, we built the optimal interface structure and calculated the electronic and optical properties of the interface. The total density of states, partial electronic density of states, electric charge density and atomic populations (Mulliken) are also displayed. The results show that the electrons converge at O atoms at the interface, leading to a stronger binding of interfaces and thereby affecting the optical properties of interface structures. In addition, we present the binding energies of different interface structures. When the interface structure of Au–ZnO gets changed, furthermore, varying optical properties are exhibited.

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Fonseca, L. R. C., PY Prodhomme y P. Blaise. "Bridging Electrical and Structural Interface Properties: a Combined DFT-GW Approach". Journal of Integrated Circuits and Systems 2, n.º 2 (18 de noviembre de 2007): 94–103. http://dx.doi.org/10.29292/jics.v2i2.273.

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The selection of a proper metal for replacement of polycrystalline silicon as the metal gate in future generation transistors has been hampered by pinning of the metal Fermi level at the metal/dielectric interface. Using monoclinic hafnia and zirconia as the gate dielectric we compare three different metal gate/gate dielectric interface structures where the oxygen affinity of the metal gate varies from low to high under normal processing conditions. For each of the metal gate/gate dielectric combination we considered a number of interface stoichiometries and tried to identify the most likely interface composition by comparing the calculated and measured valence band offsets (VBO). Because density functional theory (DFT) underestimates the dielectric band gap, it also underestimates the VBO thus requiring a correction to the band edges, which we accomplished using GW for cubic and monoclinic hafnia. Our GW shift value for monoclinic hafnia (0.3 eV) indicates mostly reduced interfaces in all metal/dielectric combinations considered.

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7

Paul, Amitesh, Carlos Zandalazini, Pablo Esquinazi, Carmine Autieri, Biplab Sanyal, Panagiotis Korelis y Peter Böni. "Structural, electronic and magnetic properties of YMnO3/La0.7Sr0.3MnO3heterostructures". Journal of Applied Crystallography 47, n.º 3 (29 de mayo de 2014): 1054–64. http://dx.doi.org/10.1107/s1600576714005871.

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Heterostructures with competing magnetic interactions are often exploited for their tailored new functionalities. Exchange bias is one such outcome of interfacial coupling across ferromagnetic–antiferromagnetic, multiferroic–ferromagnetic, two antiferromagnetic, or antiferromagnetic and paramagnetic interfaces. Apart from the usual horizontal shift of the hysteresis loop (exchange bias shift), a small `vertical shift' of the hysteresis loops along the magnetization axis has also been seen, but it was always relatively small. Recently, an unusually large `vertical shift' in epitaxial bilayer heterostructures comprising ferromagnetic La0.7Sr0.3MnO3and multiferroic orthorhombic YMnO3layers was reported. Here, using polarized neutron reflectometry, the magnetic proximity effect in such bilayers has been investigated. A detailed magnetic depth profile at the interface, elucidating the intrinsic nature of the vertical shift in such heterostructures, is reported. Further corroboration of this observation has been made by means of first-principles calculations, and the structural and electronic properties of YMnO3/La0.7Sr0.3MnO3heterostructures are studied. Although in the bulk, the ground state of YMnO3is anE-type antiferromagnet, the YMnO3/La0.7Sr0.3MnO3heterostructure stabilizes the ferromagnetic phase in YMnO3in the interface region. It is found that, in the hypothetical ferromagnetic phase of bulk YMnO3, the polarization is suppressed, and owing to a large difference between the lattice constants in theabplane a strong magnetocrystalline anisotropy is present. This anisotropy produces a high coercivity of the unusual ferromagnetic YMnO3phase at the interface, which is responsible for the large vertical shift observed in experiment.

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8

Chuprakov, Stanislav A., Tatiana P. Krinitsina, Natalia S. Bannikova, Iliya V. Blinov, Stanislav V. Verkhovskii, Michail A. Milyaev, Vladimir V. Popov y Vladimir V. Ustinov. "Interface Structure and Magnetoresistance Studies of [Co/C]_nSuperlattices by Means of NMR and TEM". Solid State Phenomena 215 (abril de 2014): 358–63. http://dx.doi.org/10.4028/www.scientific.net/ssp.215.358.

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Structural features of interfaces in [Co/Cu]n superlattices obtained by magnetron sputtering have been studied by nuclear magnetic resonance (NMR). Modification of interface structural characteristics and magnetoresistive properties of the superlattices with the increase of the number of [Co/C] bilayers is analyzed. Correlation between magnetoresistance and interface structural characteristics has been revealed.

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9

Norton, M. Grant y C. Barry Carter. "Interfaces in Structural Ceramics". MRS Bulletin 15, n.º 10 (octubre de 1990): 51–59. http://dx.doi.org/10.1557/s088376940005867x.

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Structural ceramics are necessarily polycrystalline and their usefulness is largely determined by the interfaces between the grains. The relationship between the structure and chemistry of different interfaces and the micro-structure can be illustrated by reviewing studies of interfaces in a wide range of materials including such classical ceramics as Al2O3, the current “hightech” polyphase ceramics exemplified by ZrO2-toughened Al2O3, and the composite materials of the future. Using transmission electron microscopy is essential for a complete understanding, but limitations to its use must be recognized. Only by understanding the factors that control the behavior of these interfaces will it become possible to further extend the application of interface engineering.Structural ceramics are a group of materials that can be used for applications requiring their strength to persist at high temperatures or in conditions that would be particularly corrosive to alternative materials, which are usually metallic. Strength and strength-related properties such as toughness depend largely on the microstructural features of the processed material.The microstructure is defined by the morphology and size of the grains and the interfaces between these grains. If the grains are in intimate contact, then the interface is a grain boundary of the type familiar from studies of metals.

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10

Kengne, Jules Berlin Nde, Bernard Fongang y Serge Zekeng. "Structural Properties of Fe/Cu Magnetic Multilayers: A Monte Carlo Approach". SPIN 08, n.º 03 (septiembre de 2018): 1850012. http://dx.doi.org/10.1142/s2010324718500121.

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Using atomistic Monte Carlo simulations, we investigated the impact of the interface on the structural properties of iron and copper (Fe/Cu) magnetic multilayers grown by Voronoi diagram. Interest in magnetic multilayers has recently emerged as they are shown to be promising candidates for magnetic storage media, magneto-resistive sensors and personalized medical treatment. As these artificial materials show large differences in properties compared to conventional ones, many experimental and theoretical works have been dedicated on shedding light on these differences and tremendous results have emerged. However, little is known about the influence of the interfaces on magnetic layers. Using numerical approaches, we show that the structure of each layer depends on its thickness and the interface morphology. The Fe and Cu layers can adopt either the body-centered-cubic (bcc) or face-centered-cubic (fcc) structure, while the interface can assume amorphous, bcc, fcc, or a mixture of bcc and fcc structures depending on the layer thicknesses. These results are in good agreement with the experiments. They could be helpful in understanding effects such as giant magneto-resistance from the structural perspective.

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11

Zhang, R., Y. Shi, Y. G. Zhou, B. Shen, Y. D. Zheng, T. S. Kuan, S. L. Gu, L. Zhang, D. M. Hansen y T. F. Kuech. "Structural Properties of Laterally Overgrown GaN". MRS Internet Journal of Nitride Semiconductor Research 5, S1 (2000): 111–16. http://dx.doi.org/10.1557/s1092578300004154.

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Structural properties of epitaxially laterally overgrown (ELO) GaN on patterned GaN ‘substrates’ by hydride vapor phase epitaxy (HVPE) have been investigated. The epitaxially lateral overgrowth of GaN on SiO2 areas is realized and a planar ELO GaN film is obtained. Scanning electron microscope, transmission electron microscope (TEM) and atomic force microscope (AFM) are used to study the structure and surface morphology of the ELO GaN materials. AFM images indicate that no observable step termination is detected over a 4 μm2 area in the ELO region. TEM observations indicate that the dislocation density is very low in the ELO region. No void at the coalescence interface is observed. Lattice bending as high as 3.3° is observed and attributed to pileup of threading dislocations coming from the underlying GaN “seeding layer” and tilting horizontally and quenching at the coalescence interface.

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12

Pereira, M. B., E. M. Diniz y S. Guerini. "Structural and Electronic Properties of GaN (0001)/α-Al2O3(0001) Interface". Advances in Condensed Matter Physics 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/469487.

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Structural and electronic properties of the interface betweenα-Al2O3(0001) and GaN (0001) surfaces are investigated throughab initiocalculations within the density functional theory. Two different structural models have been investigated interface N(Ga)-terminated. The interface N-terminated GaN surface seems to exhibit the lowest formation energy. The studied interface models are metallic, with the levels at energy spatially confined in the interface region. Our calculations show strong hybridization between atoms in the interface region.

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13

Olego, D. J. y D. Cammack. "Optoelectronic properties of ZnSeGaAs interfaces: Role of interface chemistry and structural defects". Journal of Crystal Growth 101, n.º 1-4 (abril de 1990): 546–49. http://dx.doi.org/10.1016/0022-0248(90)91034-n.

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14

Antón, Ricardo López, Juan A. González, Juan P. Andrés, Andrei V. Svalov y Galina V. Kurlyandskaya. "Structural and Magnetic Properties of Ni0.8Fe0.2/Ti Nanoscale Multilayers". Nanomaterials 8, n.º 10 (30 de septiembre de 2018): 780. http://dx.doi.org/10.3390/nano8100780.

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The influence of the thickness of the Ni0.8Fe0.2 (Permalloy, Py) layers on the structural and magnetic properties of magnetron sputtered Py/Ti multilayers was studied. The thickness of the Py layers was varied in the interval of 8 to 30 Å. X-ray reflectivity scans evidence the existence of a well-defined layered structure in all the samples considered, but also the presence of a complex intermixed interface. The shape of both the temperature dependence of magnetization and the hysteresis loops of the multilayered structures depends strongly on Py thickness. Magnetic and reflectivity measurements were comparatively analyzed in order to better understand the structure of the samples, and specifically, their interfaces. In particular, the presence of small superparamagnetic Py at the interfaces of the samples, especially evident in the samples with the thinnest Py layers, seems confirmed by the magnetic measurements, agreeing well with the reflectivity results.

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15

Friák, Martin, Miroslav Černý, Monika Všianská y Mojmír Šob. "Impact of Antiphase Boundaries on Structural, Magnetic and Vibrational Properties of Fe3Al". Materials 13, n.º 21 (30 de octubre de 2020): 4884. http://dx.doi.org/10.3390/ma13214884.

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We performed a quantum-mechanical study of the effect of antiphase boundaries (APBs) on structural, magnetic and vibrational properties of Fe3Al compound. The studied APBs have the {001} crystallographic orientation of their sharp interfaces and they are characterized by a 1/2⟨111⟩ shift of atomic planes. There are two types of APB interfaces formed by either two adjacent planes of Fe atoms or by two adjacent planes containing both Fe and Al atoms. The averaged APB interface energy is found to be 80 mJ/m2 and we estimate the APB interface energy of each of the two types of interfaces to be within the range of 40–120 mJ/m2. The studied APBs affect local magnetic moments of Fe atoms near the defects, increasing magnetic moments of FeII atoms by as much as 11.8% and reducing those of FeI atoms by up to 4%. When comparing phonons in the Fe3Al with and without APBs within the harmonic approximation, we find a very strong influence of APBs. In particular, we have found a significant reduction of gap in frequencies that separates phonon modes below 7.9 THz and above 9.2 THz in the defect-free Fe3Al. All the APBs-induced changes result in a higher free energy, lower entropy and partly also a lower harmonic phonon energy in Fe3Al with APBs when compared with those in the defect-free bulk Fe3Al.

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16

Wu, Xuefei, Robert Streubel, Xubo Liu, Paul Y. Kim, Yu Chai, Qin Hu, Dong Wang, Peter Fischer y Thomas P. Russell. "Ferromagnetic liquid droplets with adjustable magnetic properties". Proceedings of the National Academy of Sciences 118, n.º 8 (18 de febrero de 2021): e2017355118. http://dx.doi.org/10.1073/pnas.2017355118.

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The assembly and jamming of magnetic nanoparticles (NPs) at liquid–liquid interfaces is a versatile platform to endow structured liquid droplets with a magnetization, i.e., producing ferromagnetic liquid droplets (FMLDs). Here, we use hydrodynamics experiments to probe how the magnetization of FMLDs and their response to external stimuli can be tuned by chemical, structural, and magnetic means. The remanent magnetization stems from magnetic NPs jammed at the liquid–liquid interface and dispersed NPs magneto-statically coupled to the interface. FMLDs form even at low concentrations of magnetic NPs when mixing nonmagnetic and magnetic NPs, since the underlying magnetic dipole-driven clustering of magnetic NP-surfactants at the interface produces local magnetic properties, similar to those found with pure magnetic NP solutions. While the net magnetization is smaller, such a clustering of NPs may enable structured liquids with heterogeneous surfaces.

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17

Bragaglia, Valeria, Vara Prasad Jonnalagadda, Marilyne Sousa, Syed Ghazi Sarwat, Benedikt Kersting y Abu Sebastian. "Structural Assessment of Interfaces in Projected Phase-Change Memory". Nanomaterials 12, n.º 10 (17 de mayo de 2022): 1702. http://dx.doi.org/10.3390/nano12101702.

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Non-volatile memories based on phase-change materials have gained ground for applications in analog in-memory computing. Nonetheless, non-idealities inherent to the material result in device resistance variations that impair the achievable numerical precision. Projected-type phase-change memory devices reduce these non-idealities. In a projected phase-change memory, the phase-change storage mechanism is decoupled from the information retrieval process by using projection of the phase-change material’s phase configuration onto a projection liner. It has been suggested that the interface resistance between the phase-change material and the projection liner is an important parameter that dictates the efficacy of the projection. In this work, we establish a metrology framework to assess and understand the relevant the structural properties of the interfaces in thin films contained in projected memory devices. Using X-ray reflectivity, X-ray diffraction and transmission electron microscopy, we investigate the quality of the interfaces and the layers’ properties. Using demonstrator examples of Sb and Sb2Te3 phase-change materials, new deposition routes as well as stack designs are proposed to enhance the phase-change material to a projection-liner interface and the robustness of material stacks in the devices.

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18

Bernhoff, H., M. Qvarford, S. Söderholm, A. S. Flodström, J. N. Andersen, R. Nyholm, U. O. Karlsson y I. Lindau. "Electronic and structural properties of the Cu - Bi2CaSr2Cu2O8 interface". Physica C: Superconductivity 180, n.º 1-4 (septiembre de 1991): 120–23. http://dx.doi.org/10.1016/0921-4534(91)90649-j.

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19

Zhao, Kai. "Chemical and Structural Characterization of γ/γ′ Interfaces". Advanced Materials Research 463-464 (febrero de 2012): 20–24. http://dx.doi.org/10.4028/www.scientific.net/amr.463-464.20.

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More attention has been paid to the interfaces since mechanical properties of nickel-base superalloys are determined to some degree by them. The compositional transition across γ/γ′ interfaces and atomic structure of the interfaces was investigated using three-dimensional atom probe tomography and scanning transmission electron microscope equipped with high-resolution Energy Dispersive X-ray Spectrometry. Results show that no obvious segregation to the interfaces or ledges of the precipitates in the present experimental alloys has been observed. Also, adsorption of a solute to the interface was not observed. The interfaces are not flat as usually thought at an atomic scale. The interfacial thickness is about two atomic layers, i.e. 0.7 nm.

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Lagerlof, K. P. D. "Transmission electron microscopy of composite materials". Proceedings, annual meeting, Electron Microscopy Society of America 46 (1988): 1012–15. http://dx.doi.org/10.1017/s0424820100107125.

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Although most materials contain more than one phase, and thus are multiphase materials, the definition of composite materials is commonly used to describe those materials containing more than one phase deliberately added to obtain certain desired physical properties. Composite materials are often classified according to their application, i.e. structural composites and electronic composites, but may also be classified according to the type of compounds making up the composite, i.e. metal/ceramic, ceramic/ceramie and metal/semiconductor composites. For structural composites it is also common to refer to the type of structural reinforcement; whisker-reinforced, fiber-reinforced, or particulate reinforced composites [1-4].For all types of composite materials, it is of fundamental importance to understand the relationship between the microstructure and the observed physical properties, and it is therefore vital to properly characterize the microstructure. The interfaces separating the different phases comprising the composite are of particular interest to understand. In structural composites the interface is often the weakest part, where fracture will nucleate, and in electronic composites structural defects at or near the interface will affect the critical electronic properties.

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21

Giannini, C., E. Carlino, L. Tapfer, F. Höhnsdorf, J. Koch y W. Stolz. "Structural Properties of (GaIn)(AsN)/GaAs MQW Structures Grown by MOVPE". MRS Internet Journal of Nitride Semiconductor Research 5, S1 (2000): 259–65. http://dx.doi.org/10.1557/s1092578300004361.

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In this work, we investigate the structural properties of (GaIn)(AsN)/GaAs multiple quantum wells (MQW) grown at low temperature by metalorganic vapour phase epitaxy. The structural properties, in particular the In- and N-incorporation, the lattice strain (strain modulation), the structural perfection of the metastable (GaIn)(AsN) material system and the structural quality of the (GaIn)(AsN)/GaAs interfaces are investigated by means of high-resolution x-ray diffraction, transmission electron microscopy (TEM), and secondary ion mass spectrometry. We demonstrate that (GaIn)(AsN) layers of high structural quality can be fabricated up to lattice mismatches of 4%. Our experiments reveal that N and In atoms are localized in the quaternary material and no evidences of In-segregation or N-interdiffusion could be found. TEM analyses reveal a low defect density in the highly strained layers, but no clustering or interface undulation could be detected. High-resolution TEM images show that (GaIn)(AsN)/GaAs interfaces are slightly rougher than GaAs/(GaIn)(AsN) ones.

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Michon, Adrien, Elodie Roudon, Marc Portail, Benoit Jouault, Sylvie Contreras, Sébastien Chenot, Yvon Cordier et al. "Structural and Electrical Properties of Graphene Films Grown by Propane/Hydrogen CVD on 6H-SiC(0001)". Materials Science Forum 717-720 (mayo de 2012): 625–28. http://dx.doi.org/10.4028/www.scientific.net/msf.717-720.625.

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We have grown graphene on SiC(0001) using propane-hydrogen CVD. In this work, we present the effects of growth pressure and temperature on structural and electrical properties. Structural characterizations evidence the formation of graphene with in-plane rotational disorder, except for low growth pressure and high growth temperature which lead to the formation of a (6Ö3´6Ö3)-30° interface between graphene and SiC. Electrical properties of samples presenting different graphene/SiC stacking and interfaces are compared and discussed.

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23

Wang, Chuang, Qing Sun, Lang Zhao, Jing Jia, Lixiao Yao y Zongren Peng. "Mechanical and Dielectric Strength of Laminated Epoxy Dielectric Graded Materials". Polymers 12, n.º 3 (9 de marzo de 2020): 622. http://dx.doi.org/10.3390/polym12030622.

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Laminated epoxy dielectric graded material is a commonly used insulating material with broad application prospects in power equipment. The interlaminar interfaces of laminated epoxy dielectric material between different layers form during its lamination process, and these interfaces are the crucial characteristic structures determining the mechanical and dielectric properties of laminated materials. Therefore, in order to gain a thorough understanding of physic properties behind a certain structural motif, it is necessary to study how these interfacial structures influence the mechanical and dielectric performances of graded materials. In this study, double-layered epoxy resin samples with an interlaminar interface are prepared to study their mechanical and dielectric strength. More importantly, the formation mechanism of the interface, as well as its influence on the mechanical and dielectric strength of this laminated material, is discussed. We found that a cross-linking reaction may take place between epoxy resins at the interlaminar interface, and the degree of cross-linking at the interface should be less than that in the bulk. The mechanical strength of the interlaminar interface is weaker than that of the bulk, and it is reduced by less than 40%. Moreover, the interlaminar interface is inclined to trap carriers, which improves the breakdown strength and arc ablation resistance of the laminated material. Our study of interlaminar interface properties could help in designing epoxy dielectric graded materials with better mechanical and dielectric properties.

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Di Sciullo, Anna Maria. "Introduction: Interface Asymmetries". Canadian Journal of Linguistics/Revue canadienne de linguistique 53, n.º 2-3 (noviembre de 2008): 139–42. http://dx.doi.org/10.1017/s0008413100004436.

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The articles assembled in this issue of the Canadian Journal of Linguistics/Revue canadienne de linguistique contribute to our understanding of the role of asymmetric relations at the interfaces. Asymmetric relations have privileged status in the syntactic, phonological, and morphological derivation of linguistic expressions (see for example the articles in Di Sciullo 2003).Interfaces are representations that must meet legibility conditions imposed by external systems. According to the Strong Minimalist Thesis (Chomsky 2001), language is an optimal solution to interface conditions, in that language is an optimal way to link sound and meaning. Questions arise regarding the properties of the interface representations that make them optimally legible by external systems. These properties could very well be abstract, and remote from the perceptual systems, and could bear on the form of interface representations, rather than on the interpretation of their parts. A strong hypothesis in this regard is that asymmetric relations are core properties of the relations derived by the grammar (Chomsky 1981, 1995, 2001; Kayne 1994; Moro 2000; Di Sciullo 2005; Zwart 2006). From this perspective, asymmetry is a pervasive property of derivations and interface representations; it is thus expected to be a property of different structural relations, such as the relation between a displaced constituent and its copy, the relation between an anaphor and its antecedent, the relation between a head and its dependent, and more generally, the relation between the constituents of a configuration.

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Staiger, W., A. Michel, V. Pierron-Bohnes, N. Hermann y M. C. Cadeville. "Structural properties of molecular beam epitaxy grown Ni/Pt superlattices". Journal of Materials Research 12, n.º 1 (enero de 1997): 161–74. http://dx.doi.org/10.1557/jmr.1997.0023.

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We find that the [Ni3.2nmPt1.6nm] × 15 and [Ni3.2nmPt0.8nm] × 15 multilayers are semicoherent and display a columnar morphology. From both the period of the moir’e fringes and the positions of the diffraction peaks in electronic (plan-view and crosssection geometries) and x-ray diffraction patterns, one deduces that the nickel is relaxed (at least in the error bars of all our measurements), whereas the platinum remains slightly strained (≈−1%). The interfaces are sharp; no intermixing takes place giving rise to neat contrasts in transmission electron microscopy (TEM) and to high intensities of the superlattice peaks in the growth direction in both diffraction techniques. The relaxation of the interfacial misfit occurs partially through misfit dislocations, partially through the strain of platinum. A quasiperiodic twinning occurs at the interfaces, the stacking fault which forms the twin being the most often located at the interface Pt/Ni, i.e., when a Pt layer begins to grow on the Ni layer. The simulation of the θ/2θ superlattice peak intensities takes into account the columnar microstructure. It shows that the roughness is predominantly at medium scale with a fluctuation of about 12.5% for Ni layers and negligible for Pt layers.

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Prietsch, M., A. Samsavar y R. Ludeke. "Structural and electronic properties of the Bi/GaP(110) interface". Physical Review B 43, n.º 14 (15 de mayo de 1991): 11850–56. http://dx.doi.org/10.1103/physrevb.43.11850.

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Longo, E., C. Wiemer, R. Cecchini, M. Longo, A. Lamperti, A. Khanas, A. Zenkevich, M. Fanciulli y R. Mantovan. "Chemical, structural and magnetic properties of the Fe/Sb2Te3 interface". Journal of Magnetism and Magnetic Materials 474 (marzo de 2019): 632–36. http://dx.doi.org/10.1016/j.jmmm.2018.12.009.

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28

Zhang, S. B., Marvin L. Cohen y Steven G. Louie. "Structural and electronic properties of the Al-GaAs(110) interface". Physical Review B 34, n.º 2 (15 de julio de 1986): 768–72. http://dx.doi.org/10.1103/physrevb.34.768.

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29

Kleider, J. P., R. Chouffot, A. S. Gudovskikh, P. Roca i Cabarrocas, M. Labrune, P. J. Ribeyron y R. Brüggemann. "Electronic and structural properties of the amorphous/crystalline silicon interface". Thin Solid Films 517, n.º 23 (octubre de 2009): 6386–91. http://dx.doi.org/10.1016/j.tsf.2009.02.092.

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30

Sobolewski, Roman, W. Xiong, W. Kula y B. McIntyre. "Electrical and structural properties of the YBCO superconducting-semiconducting interface". Physica B: Condensed Matter 194-196 (febrero de 1994): 2143–44. http://dx.doi.org/10.1016/0921-4526(94)91571-7.

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31

Ma, Deng-hao, En-ze Jin, Jun-ping Li, Zhen-hua Hou, Jian Yin, Xin Sun, Jin-ming Fang, Xiao-dong Gong y Li-na Huang. "Mechanical Properties and Failure Behavior of 3D-SiCf/SiC Composites with Different Interphases". Scanning 2020 (9 de diciembre de 2020): 1–7. http://dx.doi.org/10.1155/2020/6678223.

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Continuous silicon carbide fiber-reinforced silicon carbide ceramic matrix composites (SiCf/SiC) are promising as thermal structural materials. In this work, the microstructure and static mechanical properties of 3D-SiCf/SiC with PyC, SiC, and PyC/SiC and without an interface prepared via polymer infiltration and pyrolysis (PIP) were investigated systematically in this paper. The results show that the microstructure and static mechanical properties of SiCf/SiC with an interphase layer were superior to the composites without an interlayer, and the interface debondings are existing in the composite without an interphase, resulting in a weak interface bonding. When the interphase is introduced, the interfacial shear strength is improved, the crack can be deflected, and the fracture energy can be absorbed. Meanwhile, the shear strength of the composites with PyC and PyC/SiC interfaces was 118 MPa and 124 MPa, respectively, and showing little difference in bending properties. This indicates that the sublayer SiC of the PyC/SiC multilayer interface limits the binding state and the plastic deformation of PyC interphase, and it is helpful to improve the mechanical properties of SiCf/SiC.

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32

Hu, Gan, Jiemin Zhang, Qi Wang, Meihu Ma, Lulu Ma y Shugang Li. "Succinylation Modified Ovalbumin: Structural, Interfacial, and Functional Properties". Foods 11, n.º 18 (6 de septiembre de 2022): 2724. http://dx.doi.org/10.3390/foods11182724.

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In this study, ovalbumin (OVA) was succinylated with the addition of different levels of succinic anhydride, and the structural and functional properties of succinylated OVA (SOVA) were investigated. SDS−PAGE and FTIR spectrum confirmed the covalent attachment of the succinyl group to OVA. Thermal stability and the absolute value of zeta potential (pH 6.0) of SOVA were enhanced by 14.90% and 76.77% higher than that of the native OVA (NOVA), respectively. Circular dichroism (CD) spectra demonstrated that the succinylation decreased the α−helix and increased β−sheet content to 21.31% and 43.28%, respectively. The content of free sulfhydryl groups increased and intrinsic fluorescence spectra suggested the SOVA became more unfolded and flexible as the degree of succinylation enhanced. Furthermore, succinylation effectively enhanced the solubility and decreased the interface tension (oil−water and air−water interface) of OVA. Compared to NOVA, the emulsifying activity and stability of SOVA were increased by 1.6 times and 1.2 times, respectively, and foaming capacity and stability were enhanced by 2.7 times and 1.5 times, respectively.

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33

Liu, Rong Di, Jian Guo Zheng y Zhi Yuan Li. "Research on Static Mechanical Properties of Interface between Structure and Gravel Underlayer". Applied Mechanics and Materials 353-356 (agosto de 2013): 430–35. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.430.

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A series of soil-structure shear tests was taken by self-made large single shear apparatus and the main factors affecting behavior of the interface are studied. It was shown that the deformation and mechanical properties are determined by the roughness of structural surface, particle size distribution and normal stress. The interface deformation includes the shear deformation of the soil near the structure due to the constraint of structural surface and the slipping deformation of soil-structure interface, they happen at the same time and interact each other . The thickness of the interface element is 4 to 5 times of the average particle diameter away from the structure surface.

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34

Friák, Martin, David Holec y Mojmír Šob. "Quantum-Mechanical Study of Nanocomposites with Low and Ultra-Low Interface Energies". Nanomaterials 8, n.º 12 (15 de diciembre de 2018): 1057. http://dx.doi.org/10.3390/nano8121057.

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We applied first-principles electronic structure calculations to study structural, thermodynamic and elastic properties of nanocomposites exhibiting nearly perfect match of constituting phases. In particular, two combinations of transition-metal disilicides and one pair of magnetic phases containing the Fe and Al atoms with different atomic ordering were considered. Regarding the disilicides, nanocomposites MoSi 2 /WSi 2 with constituents crystallizing in the tetragonal C11 b structure and TaSi 2 /NbSi 2 with individual phases crystallizing in the hexagonal C40 structure were simulated. Constituents within each pair of materials exhibit very similar structural and elastic properties and for their nanocomposites we obtained ultra-low (nearly zero) interface energy (within the error bar of our calculations, i.e., about 0.005 J/m 2 ). The interface energy was found to be nearly independent on the width of individual constituents within the nanocomposites and/or crystallographic orientation of the interfaces. As far as the nanocomposites containing Fe and Al were concerned, we simulated coherent superlattices formed by an ordered Fe 3 Al intermetallic compound and a disordered Fe-Al phase with 18.75 at.% Al, the α -phase. Both phases were structurally and elastically quite similar but the disordered α -phase lacked a long-range periodicity. To determine the interface energy in these nanocomposites, we simulated seven different distributions of atoms in the α -phase interfacing the Fe 3 Al intermetallic compound. The resulting interface energies ranged from ultra low to low values, i.e., from 0.005 to 0.139 J/m 2 . The impact of atomic distribution on the elastic properties was found insignificant but local magnetic moments of the iron atoms depend sensitively on the type and distribution of surrounding atoms.

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35

Bartsch, Hendrik, Markus Bier y Siegfried Dietrich. "Interface structures in ionic liquid crystals". Soft Matter 15, n.º 20 (2019): 4109–26. http://dx.doi.org/10.1039/c9sm00062c.

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36

Ohata, Jun y Zachary T. Ball. "Rhodium at the chemistry–biology interface". Dalton Transactions 47, n.º 42 (2018): 14855–60. http://dx.doi.org/10.1039/c8dt03032d.

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37

Frenkel, Dolev, Eran Ginsbury y Mirit Sharabi. "The Mechanics of Bioinspired Stiff-to-Compliant Multi-Material 3D-Printed Interfaces". Biomimetics 7, n.º 4 (18 de octubre de 2022): 170. http://dx.doi.org/10.3390/biomimetics7040170.

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Complex interfaces that involve a combination of stiff and compliant materials are widely prevalent in nature. This combination creates a superior assemblage with strength and toughness. When combining two different materials with large stiffness variations, an interfacial stress concentration is created, decreasing the structural integrity and making the structure more prone to failure. However, nature frequently combines two dissimilar materials with different properties. Additive manufacturing (AM) and 3D printing have revolutionized our engineering capabilities concerning the combination of stiff and compliant materials. The emergence of multi-material 3D-printing technologies has allowed the design of complex interfaces with combined strength and toughness, which is often challenging to achieve in homogeneous materials. Herein, we combined commercial 3D-printed stiff (PETG) and compliant (TPU) polymers using simple and bioinspired interfaces using a fused deposition modeling (FDM) printer and characterized the mechanical behaviors of the interfaces. Furthermore, we examined how the different structural parameters, such as the printing resolution (RES) and horizontal overlap distance (HOD), affect the mechanical properties. We found that the bioinspired interfaces significantly increased the strain, toughness, and tensile modulus compared with the simple interface. Furthermore, the more refined printing resolution elevated the yield stress, while the increased overlap distance mostly elevated the strain and toughness. Additionally, 3D printing allows the fabrication of other complex designs in the stiff and compliant material interface, allowing various tailor-designed and bioinspired interfaces. The importance of these bioinspired interfaces can be manifested in the biomedical and robotic fields and through interface combinations.

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38

Navío, Dàmaris, Mireia Rosell, Josu Aguirre, Xavier de la Cruz y Juan Fernández-Recio. "Structural and Computational Characterization of Disease-Related Mutations Involved in Protein-Protein Interfaces". International Journal of Molecular Sciences 20, n.º 7 (29 de marzo de 2019): 1583. http://dx.doi.org/10.3390/ijms20071583.

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One of the known potential effects of disease-causing amino acid substitutions in proteins is to modulate protein-protein interactions (PPIs). To interpret such variants at the molecular level and to obtain useful information for prediction purposes, it is important to determine whether they are located at protein-protein interfaces, which are composed of two main regions, core and rim, with different evolutionary conservation and physicochemical properties. Here we have performed a structural, energetics and computational analysis of interactions between proteins hosting mutations related to diseases detected in newborn screening. Interface residues were classified as core or rim, showing that the core residues contribute the most to the binding free energy of the PPI. Disease-causing variants are more likely to occur at the interface core region rather than at the interface rim (p < 0.0001). In contrast, neutral variants are more often found at the interface rim or at the non-interacting surface rather than at the interface core region. We also found that arginine, tryptophan, and tyrosine are over-represented among mutated residues leading to disease. These results can enhance our understanding of disease at molecular level and thus contribute towards personalized medicine by helping clinicians to provide adequate diagnosis and treatments.

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39

Dems, K. y Z. Mróz. "Analysis and design of thermo-mechanical interfaces". Bulletin of the Polish Academy of Sciences: Technical Sciences 60, n.º 2 (1 de octubre de 2012): 205–13. http://dx.doi.org/10.2478/v10175-012-0027-4.

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Abstract. An elastic structure subjected to thermal and mechanical loading with prescribed external boundary and varying internal interface is considered. The different thermal and mechanical nature of this interface is discussed, since the interface form and its properties affect strongly the structural response. The first-order sensitivities of an arbitrary thermal and mechanical behavioral functional with respect to shape and material properties of the interface are derived using the direct or adjoint approaches. Next the relevant optimality conditions are formulated. Some examples illustrate the applicability of proposed approach to control the structural response due to applied thermal and mechanical loads.

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40

Nayak, Maheswar, P. C. Pradhan y G. S. Lodha. "Element-specific structural analysis of Si/B4C using resonant X-ray reflectivity". Journal of Applied Crystallography 48, n.º 3 (9 de mayo de 2015): 786–96. http://dx.doi.org/10.1107/s1600576715005877.

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Element-specific structural analysis at the buried interface of a low electron density contrast system is important in many applied fields. The analysis of nanoscaled Si/B4C buried interfaces is demonstrated using resonant X-ray reflectivity. This technique combines information about spatial modulations of charges provided by scattering, which is further enhanced near the resonance, with the sensitivity to electronic structure provided by spectroscopy. Si/B4C thin-film structures are studied by varying the position of B4C in Si layers. Measured values of near-edge optical properties are correlated with the resonant reflectivity profile to quantify the element-specific composition. It is observed that, although Si/B4C forms a smooth interface, there are chemical changes in the sputtered B4C layer. Nondestructive quantification of the chemical changes and the spatial distribution of the constituents is reported.

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41

Li, Yong, Yuanchun Huang y Xieyi Zhang. "Ab-Initio Studies of the Micromechanics and Interfacial Behavior of Al3Y|fcc-Al". Metals 12, n.º 10 (8 de octubre de 2022): 1680. http://dx.doi.org/10.3390/met12101680.

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In this paper, an Ab-initio study was employed to study the properties of interfaces of Al3Y|Al. The interface strength, shear strength, structural stability, electronic density, bonding characteristics, stacking fault energy, and plasticity were all investigated. The interface with the stacking style of ABab or CBAcba has the greatest interface strength. The Al3Y(111)|Al(111) interface has the highest tensile stress of 13.39 GPa for rigid stretching; and 9.39 GPa for relaxation stretching. In the stretching process, the Al3Y(111)|Al(111) interface is prone to break on the Al3Y side. However, the Al3Y(010)|Al(010) and Al3Y(110)|Al(110) interface systems tend to fracture at the interface and Al side, respectively. Moreover, the differential charge density, electron localization function, and partial density of states (PDOS) demonstrate the newly formed chemical bonds at the interface, and the chemical bonds were formed by s-p or s-p-d hybrid orbitals. According to the Rice ratio and shear stress, these interfaces were found to be plastic and the Al3Y(111)|Al(111) interface has the best plasticity. This is significant because the formed interfaces are all advanced structure materials, which can be potentially used in automobile and aeronautical fields, even in some special industries.

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42

Bakulin, Alexander V., Sergey S. Kulkov, Svetlana E. Kulkova, Stephen Hocker y Siegfried Schmauder. "First Principles Study of Bonding Mechanisms at the TiAl/TiO2 Interface". Metals 10, n.º 10 (29 de septiembre de 2020): 1298. http://dx.doi.org/10.3390/met10101298.

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The adhesion properties of the TiAl/TiO2 interface are estimated in dependence on interfacial layer composition and contact configuration using the projector augmented wave method. It is shown that a higher value of the work of separation is obtained at the interface between the Ti-terminated TiAl(110) surface and the TiO2(110)O one than at that with the Al-terminated alloy. An analysis of structural and electronic factors dominating the chemical bonding at the interfaces is carried out. It is shown that low bond densities are responsible for low adhesion at both considered interfaces, which may affect the spallation of oxide scale from the TiAl matrix.

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43

Wang, Chengzhi, Xin Liu, Wei Liu y Zhiming Li. "Effects of Different Interface Forms on Mechanical Properties of Steel Self-Compacting Concrete Composite Beams". Advances in Civil Engineering 2020 (3 de agosto de 2020): 1–17. http://dx.doi.org/10.1155/2020/8813544.

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In the water resources allocation project in Pearl River Delta, in order to optimize the structural design, the deep buried tunnel adopts the composite lining structure. However, the weakest link in a complex structure is the connection between two different interfaces. This paper reports the findings of an experimental study that was undertaken to investigate the interface mechanical performance of steel self-compacting concrete composite structure subjected to cyclic loads. In this study, different shear connectors are considered, and six different specimens were designed and tested, respectively. The test is used to research the effect of the different shear connectors on the bearing capacity and interface mechanical properties of composite structure in an experimental study. According to these test results, a detailed analysis was carried out on the relationships, such as the stress-strain and load-displacement relationships for the specimen. These tests show that the shear connectors will significantly enhance the bearing capacity and interface mechanical properties of the composite structure. Among them, the comprehensive performance of the specimens using the stud-longitudinal ribs shear connectors is the best. Additionally, a finite element analysis (FEA) model was developed. The comparison of the simulation results with the experimental results shows that this FEA is applicable for this type of experiment.

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44

Dravid, Vinayak P., M. R. Notis y C. E. Lyman. "Determination of interface width using EELS fine structure changes". Proceedings, annual meeting, Electron Microscopy Society of America 49 (agosto de 1991): 730–31. http://dx.doi.org/10.1017/s0424820100087963.

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The concept of interfacial width is often invoked in many materials science phenomena which relate to the structure and properties of internal interfaces. The numerical value of interface width is an important input parameter in diffusion equations, sintering theories as well as in many electronic devices/processes. Most often, however, this value is guessed rather than determined or even estimated. In this paper we present a method of determining the effective structural and electronic- structural width of interphase interfaces using low- and core loss fine structure effects in EELS spectra.The specimens used in the study were directionally solidified eutectics (DSEs) in the system; NiO-ZrO2(CaO), NiO-Y2O3 and MnO-ZrO2(ss). EELS experiments were carried out using a VG HB-501 FE STEM and a Hitachi HF-2000 FE TEM.

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45

Han, Ke, Rongmei Niu, Jun Lu y Vince Toplosky. "High Strength Conductors and Structural Materials for High Field Magnets". MRS Advances 1, n.º 17 (2016): 1233–39. http://dx.doi.org/10.1557/adv.2016.264.

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ABSTRACTOne important approach to increasing High magnetic fields (HMF) beyond what is now possible is to improve the properties of various composite materials used as both conductors and structural support. Typical conductors for high field magnets are Cu-based metal-metal composites. To achieve high mechanical strength, these composites are fabricated by cold deformation, which introduces high densities of interfaces along with lattice distortions. During the operation of a magnet, mechanical load, high magnetic field, extreme temperatures and other stressors are imposed on the materials, causing them to be further “processed”. The composite conductors in a magnet, for example, may undergo high temperatures, which reduce lattice distortions or soften the material. At the same time, HMF may increase lattice distortion, leading to a complex change in interface characteristics. Both the mechanical properties of the conductors, like the tensile and yield strength, and the electric conductivity of the composites are closely connected to changes in lattice distortion and interface density. Understanding these changes helps us to assure that materials can operate in optimized conditions during most of magnets’ service life. Maximizing service life is critical, given the high cost of building and operating high field magnets. The goal of this paper is to 1) show our understanding of changes that occur in the properties of selected materials during the fabrication and under HMF and 2) to discuss how those changes relate to the microstructure of these materials and consequently to the service life of high field magnets.

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46

Ishii, Junko, Shigenori Matsushima y Masamichi Naitoh. "Electronic and structural properties of H-intercalated graphene-SiC (0001) interface". Japanese Journal of Applied Physics 58, n.º 3 (4 de febrero de 2019): 035001. http://dx.doi.org/10.7567/1347-4065/aafb4a.

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47

Koumo, Hideo, Yusuke Oniki, Yoshitaka Iwazaki y Tomo Ueno. "Effects of Structural Transformation of Metal-GeO2 Interface on Electrical Properties". Journal of The Electrochemical Society 158, n.º 6 (2011): G146. http://dx.doi.org/10.1149/1.3581033.

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48

Tao, Yongsheng, Hongying Mao y Pimo He. "Electronic and structural properties at the interface between CuPc and graphene". Journal of Applied Physics 117, n.º 1 (7 de enero de 2015): 013701. http://dx.doi.org/10.1063/1.4904087.

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49

Schieffer, P., N. Tournerie, B. Lépine, C. Lallaizon, A. Guivarc'h y G. Jézéquel. "Interface formation and structural properties of iron films on Al0.48In0.52As(001)". Journal de Physique IV (Proceedings) 132 (marzo de 2006): 225–29. http://dx.doi.org/10.1051/jp4:2006132043.

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50

Volkov, V. y M. Bonn. "Structural Properties of gp41 Fusion Peptide at a Model Membrane Interface". Journal of Physical Chemistry B 117, n.º 49 (23 de agosto de 2013): 15527–35. http://dx.doi.org/10.1021/jp405852r.

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