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Автор: Grafiati
Опубліковано: 7 вересня 2023

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Статті в журналах з теми "Disordered Materials - Properties"

1

Julien, C. "Electrochemical properties of disordered cathode materials." Ionics 2, no. 3-4 (May 1996): 169–78. http://dx.doi.org/10.1007/bf02376017.

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2

Chauvet, O., L. Zuppiroli, and I. Solomon. "Electronic properties of disordered SiC materials." Materials Science and Engineering: B 11, no. 1-4 (January 1992): 303–6. http://dx.doi.org/10.1016/0921-5107(92)90229-3.

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3

Fanchini, G., S. C. Ray, and A. Tagliaferro. "Optical properties of disordered carbon-based materials." Surface and Coatings Technology 151-152 (March 2002): 233–41. http://dx.doi.org/10.1016/s0257-8972(01)01658-9.

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4

Schaefer, Dale W. "Fractal Models and the Structure of Materials." MRS Bulletin 13, no. 2 (February 1988): 22–27. http://dx.doi.org/10.1557/s088376940006632x.

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Анотація:
Science often advances through the introdction of new ideas which simplify the understanding of complex problems. Materials science is no exception to this rule. Concepts such as nucleation in crystal growth and spinodal decomposition, for example, have played essential roles in the modern understanding of the structure of materials. More recently, fractal geometry has emerged as an essential idea for understanding the kinetic growth of disordered materials. This review will introduce the concept of fractal geometry and demonstrate its application to the understanding of the structure of materials.Fractal geometry is a natural concept used to describe random or disordered objects ranging from branched polymers to the earth's surface. Disordered materials seldom display translational or rotational symmetry so conventional crystallographic classification is of no value. These materials, however, often display “dilation symmetry,” which means they look geometrically self-similar under transformation of scale such as changing the magnification of a microscope. Surprisingly, most kinetic growth processes produce objects with self-similar fractal properties. It is now becoming clear that the origin of dilation symmetry is found in disorderly kinetic growth processes present in the formation of these materials.
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5

Eckert, J., G. D. Stucky, and A. K. Cheetham. "Partially Disordered Inorganic Materials." MRS Bulletin 24, no. 5 (May 1999): 31–41. http://dx.doi.org/10.1557/s0883769400052301.

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It is widely recognized that the presence of defects in crystals and other solid materials can have a profound effect upon their chemical and physical properties and, consequently, that defects have a major impact on the practical utility of many technological materials. The presence of defects in a crystalline material implies the presence of disorder, and the extent of such disorder can range from very minor, such as the occurrence of Schottky defects in a crystal of sodium chloride, to maximum disorder, as in an amorphous material. The focus of this overview is on systems that are partially disordered, spanning the range between—but not including—sodium chloride and an amorphous material. Even within this range, the aim is not to be comprehensive, since for space reasons we have restricted our coverage to inorganic materials and hybrid inorganic-organic systems. The choice of this topic stems from both its fundamental and practical importance; it is also a very timely topic. For example, there is a great deal of current interest in complex, partially ordered materials such as the surfactant-mediated mesoporous silicas, biominerals, and hybrid organic-inorganic composites. Research on such materials has presented challenges that cannot easily be addressed by characterization tools that have been developed for well-ordered materials. The same situation is found in other areas such as carbons (including nanotubes) and glassy metal oxides.
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6

Jarlborg, T., and E. G. Moroni. "Electronic structure and vibrational properties in disordered materials." Physica Scripta T57 (January 1, 1995): 64–68. http://dx.doi.org/10.1088/0031-8949/1995/t57/009.

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7

Im, Soohyun, Gabriel Calderon Ortiz, Mehrdad Abbasi Gharacheh, Robert Williams, and Jinwoo Hwang. "Connecting Structural Heterogeneity to Properties of Disordered Materials." Microscopy and Microanalysis 26, S2 (July 30, 2020): 714–16. http://dx.doi.org/10.1017/s1431927620015615.

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8

Wu, Bi-Yi, Xin-Qing Sheng, and Yang Hao. "Effective media properties of hyperuniform disordered composite materials." PLOS ONE 12, no. 10 (October 5, 2017): e0185921. http://dx.doi.org/10.1371/journal.pone.0185921.

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9

Lu, Peng Xian. "Thermoelectric Properties of Binary-Phased Nanocomposites." Materials Science Forum 809-810 (December 2014): 3–8. http://dx.doi.org/10.4028/www.scientific.net/msf.809-810.3.

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In order to increase the electrical conductivity greatly but maintain a large Seebeck coefficient and a low thermal conductivity simultaneously, the binary-phased LaCeFe3CoSb12-Sb nanocomposites composed of LaCeFe3CoSb12skutterudite nanospheres and semimetal Sb microsized ribbons were fabricated via a hydro/solvo thermal route. The results suggest that the Sb powders result in a disordered structure during a hot-press process at its melting-point temperature and the disordered structure has been partly preserved into the room-temperature materials successfully. The Sb microsized ribbons enhance the electrical conductivity of the binary-phased materials largely, meanwhile the disordered structure increases the Seebeck coefficient obviously even though the thermal conductivity is also increased slightly. Consequently, the figure of merit of the binary-phased materials is improved significantly and the maximum value of 1.54 at 773 K has been realized for the LaCeFe3CoSb15material.
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Pendry, J. B., and E. Castano. "Electronic properties of disordered materials: a symmetric group approach." Journal of Physics C: Solid State Physics 21, no. 23 (August 20, 1988): 4333–55. http://dx.doi.org/10.1088/0022-3719/21/23/016.

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Дисертації з теми "Disordered Materials - Properties"

1

Belk, Nathan. "Electronic transport and magnetic properties of disordered high-Tc materials." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/10745.

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2

Murai, Syunsuke. "Studies on photonic materials having disordered structures and tailored light scattering properties." 京都大学 (Kyoto University), 2011. http://hdl.handle.net/2433/147363.

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3

Li, Yuting. "Simulations and Electronic Structure of Disordered Silicon and Carbon Materials." Ohio University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1395410498.

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4

Valkovskii, Vitalii [Verfasser], and Sergei [Akademischer Betreuer] Baranovskii. "Optical and Transport Properties of Disordered Materials by Computer Simulation / Vitalii Valkovskii ; Betreuer: Sergei Baranovskii." Marburg : Philipps-Universität Marburg, 2018. http://d-nb.info/1170321275/34.

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5

Timothy, Jithender J. [Verfasser], Günther [Gutachter] Meschke, and Christian [Gutachter] Hellmich. "Analytical and computational models for the effective properties of disordered microcracked porous materials / Jithender J. Timothy ; Gutachter: Günther Meschke, Christian Hellmich." Bochum : Ruhr-Universität Bochum, 2017. http://d-nb.info/1125106603/34.

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6

Lebihain, Mathias. "Large-scale crack propagation in heterogeneous materials : an insight into the homogenization of brittle fracture properties." Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUS522.

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La compréhension du comportement macroscopique d'un matériau à partir de la donnée de ses constituants à l'échelle microscopique a toujours été le Saint Graal en science des matériaux dans la mesure où elle fournit les éléments essentiels à la prédiction de la résistance d'une structure et au développement de matériaux aux propriétés innovantes. Si la théorie de l'homogénéisation constitue un cadre théorique établi pour prédire la réponse effective d'une vaste classe de comportements matériaux, elle ne permet pas à l'heure actuelle de prédire les propriétés effectives en rupture fragile. S'attaquer à cette question suppose de tirer profit des caractéristiques uniques de la rupture fragile qui est (i) un problème d'évolution dissipatif, (ii) localisé en pointe de fissure et (iii) relié à un problème de structure. Dans ce travail, nous proposons un formalisme théorique fondé sur une approche perturbative de la mécanique de la rupture afin de (i) modéliser la propagation de fissure dans les milieux désordonnés de grande taille. L'implémentation numérique de ce modèle nous permet (ii) d'étudier en détail les mécanismes dissipatifs mis en jeu en pointe de fissure lorsqu'une fissure interagit avec des hétérogénéités. Leur contribution au renforcement du matériau à l'échelle macroscopique est finalement (iii) estimée à partir de la résolution du problème de structure à l'aide d'outils empruntés à la physique statistique. Les apports théoriques et numériques de la thèse sont finalement confrontés aux résultats d'expériences de fissuration de polymères hétérogènes imprimés 3D, extraits d'outils de corrélation d'image
Being able to predict the macroscopic response of a material from the knowledge of its constituent at a microscopic or mesoscopic scale has always been the Holy Grail pursued by material science, for it provides building bricks for the understanding of complex structures as well as for the development of tailor-made optimized materials. The homogenization theory constitutes nowadays a well-established theoretical framework to estimate the overall response of composite materials for a broad range of mechanical behaviors. Such a framework is still lacking for brittle fracture, which is a dissipative evolution problem that (ii) localizes at the crack tip and (iii) is related to a structural one. In this work, we propose a theoretical framework based on a perturbative approach of Linear Elastic Fracture Mechanics to model (i) crack propagation in large-scale disordered materials as well (ii) the dissipative processes involved at the crack tip during the interaction of a crack with material heterogeneities. Their ultimate contribution to the macroscopic toughness of the composite is (iii) estimated from the resolution of the structural problem using an approach inspired by statistical physics. The theoretical and numerical inputs presented in the thesis are finally compared to experimental measurements of crack propagation in 3D-printed heterogeneous polymers obtained through digital image correlation
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7

Penfold, Ian Timothy. "Structural properties of chalcogenide material." Thesis, University of East Anglia, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278073.

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8

Yu, Tae-Hwan. "Electrical properties and structural disorder in stannate pyrochlores." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/40609.

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9

Shrestha, Kiran (Engineer). "Electrical Conduction Mechanisms in the Disordered Material System P-type Hydrogenated Amorphous Silicon." Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc700106/.

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Анотація:
The electrical and optical properties of boron doped hydrogenated amorphous silicon thin films (a-Si) were investigated to determine the effect of boron and hydrogen incorporation on carrier transport. The a-Si thin films were grown by plasma enhanced chemical vapor deposition (PECVD) at various boron concentrations, hydrogen dilutions, and at differing growth temperatures. The temperature dependent conductivity generally follows the hopping conduction model. Above a critical temperature, the dominant conduction mechanism is Mott variable range hopping conductivity (M-VRH), where p = ¼, and the carrier hopping depends on energy. However, at lower temperatures, the coulomb interaction between charge carriers becomes important and Efros-Shklosvkii variable hopping (ES-VRH) conduction, where p=1/2, must be included to describe the total conductivity. To correlate changes in electrical conductivity to changes in the local crystalline order, the transverse optical (TO) and transverse acoustic (TA) modes of the Raman spectra were studied to relate changes in short- and mid-range order to the effects of growth temperature, boron, and hydrogen incorporation. With an increase of hydrogen and/or growth temperature, both short and mid-range order improve, whereas the addition of boron results in the degradation of short range order. It is seen that there is a direct correlation between the electrical conductivity and changes in the short and mid-range order resulting from the passivation of defects by hydrogen and the creation of trap states by boron. This work was done under the ARO grant W911NF-10-1-0410, William W. Clark Program Manager. The samples were provided by L-3 Communications.
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10

Shaw, Stephanie M. "Frequency Response of Synthetic Vocal Fold Models with Linear and Nonlinear Material Properties." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2433.

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Previous studies have shown the importance of cricothyroid muscle activation in altering fundamental frequency in the human voice. Other studies have investigated the non-linear properties of vocal fold tissue and the impact of this non-linearity on frequency response. Several physical models of the vocal folds have been made for research purposes. However, all have been isotropic in nature with linear stress-strain properties. The purpose of this study was to create a physical model with non-linear stress-strain properties to investigate the frequency response of the model as cricothyroid muscle activation was simulated (in other words, as the vocal folds were stretched in an anterior-posterior dimension). In this study the physical models of the vocal folds were stretched in 1 mm increments and the fundamental frequency (F0) was recorded at each position. Subglottal pressure was also monitored and phonation threshold pressures were recorded for each adjustment in length and vocal fold tension, because this can influence F0. Results were obtained for models with and without non-linear properties for comparison. Tensile tests were also conducted for the linear and non-linear synthetic vocal folds. Results indicate that non-linear models demonstrated a more substantial frequency response than linear vocal fold models and a more predictable F0 increase with respect to increasing vocal fold length. Phonation threshold pressures also increased with increasing vocal fold length for non-linear vocal fold models. This trend was reversed for linear vocal fold models, with phonation threshold pressures decreasing with increasing vocal fold length. These results indicate that the non-linear vocal fold models more accurately represent the human vocal folds than do linear models. This study serves as the foundation for future research to quantify the impact of non-linear tissue properties versus active tensioning (through antagonistic thyroarytenoid muscle activation) on F0 response and phonation threshold pressure.
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Книги з теми "Disordered Materials - Properties"

1

Sergei, Baranovski, ed. Charge transport in disordered solids with applications in electronics. Chichester, England: Wiley, 2006.

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2

K, Srivastava S., INDIAS (Allahabad, India : Organization), D.A. University, Indore, India., and International Conference on Disordered Materials (1st : 1991 : Indore, India), eds. Disordered materials: Structure and properties : proceedings of the International Conference, INDIAS-91 held at D.A. University, Indore, India, from 3-6 February 1991. Allahabad: INDIAS Publications, 1993.

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3

Rybicki, Jarosław, and Wojciechc Sadowski. Abstract book: Conferences in materials science : IX International Conference of Polish Society for Crystal Growth, ICPSCG-9 : new techniques, properties and applications : 5th International Conference on Physics of Disordered Systems, PDS10 : 23-27.05.2010, Gdansk Sobieszewo, Poland. Gdansk, Poland: Task Publishing, 2010.

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4

International, Symposium on Metastable Mechanically Alloyed and Nanocrystalline Materials (1994 Grenoble France). Mechanically alloyed and nanocrystalline materials: ISMANAM-94 : proceedings of the International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials, Grenoble, France, June 27-July 1, 1994. Aedermannsdorf, Switzerland: Trans Tech Publications, 1995.

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5

International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials (1996 Rome, Italy). Synthesis and properties of mechanically alloyed and nanocrystalline materials: ISMANAM-96 : proceedings of the International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials, Rome, Italy, May 20-24, 1996. Edited by Fiorani D and Magini Mauro. Uetikon-Zuerich, Switzerland: Trans Tech Publications, 1997.

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6

International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials (1998 Wollongong (Sydney), Australia). Metastable, mechanically alloyed and nanocrystalline materials: ISMANAM-98 : proceedings of the International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials, (ISMANAM 98), held in Wollongong (Sydney), Australia, December 1998. Edited by Calka A and Wexler D. Zürich, Switzerland: Transtec Publications, 1999.

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7

George C. Marshall Space Flight Center., ed. [Computational modeling of properties]: [final report]. Marshall Space Flight Center, AL: National Aeronautics and Space Administration, George C. Marshall Space Flight Center, 1995.

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8

United States. National Aeronautics and Space Administration., ed. [Computational modeling of properties]: [final report, 12 Mar. 1993 - 11 Jul. 1994]. [Washington, DC: National Aeronautics and Space Administration, 1994.

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9

Horton, G. K., and Alexei A. Maradudin. Metals, Superconductors, Magnetic Materials, Liquids Disordered Solids, Optical Properties. Elsevier Science & Technology Books, 2012.

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10

Baranovski, Sergei. Charge Transport in Disordered Solids with Applications in Electronics. Wiley & Sons, Incorporated, John, 2006.

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Частини книг з теми "Disordered Materials - Properties"

1

Madan, A., and S. R. Ovshinsky. "Properties of Amorphous Si:F:H Alloys." In Disordered Materials, 88–93. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-8745-9_17.

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2

Ossi, Paolo M. "Solids: Geometrical and Symmetrical Properties." In Disordered Materials, 1–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-05158-0_1.

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3

Flasck, R., M. Izu, K. Sapru, T. Anderson, S. R. Ovshinsky, and H. Fritzsche. "Optical and Electronic Properties of Modified Amorphous Materials." In Disordered Materials, 51–53. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-8745-9_13.

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4

Kadin, A. M., R. W. Burkhardt, J. T. Chen, J. E. Keem, and S. R. Ovshinsky. "Superconducting Properties of Amorphous Multilayer Metal-Semiconductor Composites." In Disordered Materials, 106–9. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-8745-9_21.

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5

Ovshinsky, Stanford R., and David Adler. "Local Structure, Bonding, and Electronic Properties of Covalent Amorphous Semiconductors." In Disordered Materials, 54–63. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-8745-9_14.

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6

Wood, J., J. E. Keem, J. T. Chen, A. M. Kadin, R. W. Burkhardt, and S. R. Ovshinsky. "Superconducting Properties of Sputtered Mo-C Films with Columnar Microstructure." In Disordered Materials, 110–13. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-8745-9_22.

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7

Ovshinsky, S. R., and K. Sapru. "Three Dimensional Model of Structure and Electronic Properties of Chalcogenide Glasses." In Disordered Materials, 38–40. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-8745-9_9.

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8

Edelstein, A. S., S. R. Ovshinsky, H. Sadate-Akhavi, and J. Wood. "Correlation Between the Superconducting and Normal State Properties of Amorphous Molybdenum-Silicon Alloys." In Disordered Materials, 102–5. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-8745-9_20.

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Bicerano, Josef, and Stanford R. Ovshinsky. "Chemical Bond Approach to the Structures of Chalcogenide Glasses with Reversible Switching Properties." In Disordered Materials, 132–35. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-8745-9_27.

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10

Dragoman, Daniela, and Mircea Dragoman. "Optical Properties of Disordered Materials." In Optical Characterization of Solids, 353–406. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04870-2_7.

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Тези доповідей конференцій з теми "Disordered Materials - Properties"

1

NEILSON, DAVID, and D. J. W. GELDART. "LOW TEMPERATURE PROPERTIES OF 2D CORRELATED ELECTRONS IN WEAKLY DISORDERED MATERIALS." In Proceedings of the 11th International Conference. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812777843_0005.

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2

Samuel, B. A., C. M. Lentz, and M. A. Haque. "Experimental Study of Structure-Electrical Transport Correlation in Single Disordered Carbon Nanowires." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11739.

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We present experimental results characterizing the changes in electrical transport of single disordered carbon nanowires (diameter 150–250 nm) to the changes in microstructure within the nanowires induced by synthesis temperature. The material system studied is a nanoporous, semiconducting disordered carbon nanowire obtained from the pyrolysis of a polymeric precursor (polyfurfuryl alcohol). Unlike the other allotropes of carbon such as diamond, graphite (graphenes) and fullerenes (CNT, buckyballs), disordered carbons lack crystalline order and hence can exhibit a range of electronic properties, dependent on the degree of disorder and the local microstructure. Such disordered carbon nanowires are therefore materials whose electronic properties can be engineered to specifications if we understand the structure-property correlations. Using dark DC conductivity tests, measurements were performed from 300K to 450K. The charge transport behavior in the nanowires is found to follow an activation-energy based conduction at high temperatures. The conductivity for nanowires synthesized from 600°C to 2000°C is calculated and is linked to changes in the microstructure using data obtained from SEM, TEM and Raman spectroscopy. The electrical properties of the nanowire are shown to be linked intrinsically to the microstructure and the degree of disorder, which in turn can be controlled to a great extent just by controlling the pyrolysis temperature. This ability to tune the electrical property, specifically conductivity, and map it to the structural changes within the disordered material makes it a candidate material for use in active/passive electronic components, and as versatile transducers for sensors.
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3

Cazzulani, Gabriele, Emanuele Riva, Edoardo Belloni, and Francesco Braghin. "Design of Disordered Periodic Structures for Mode Localization." In ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/smasis2017-3876.

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Periodic structures are the repetition of unit cells in space, that provide a filtering behavior for wave propagation. In particular, it is possible to tailor the geometrical, physical and elastic properties of the unit cells, in order to attenuate certain frequency bands, called band-gaps or stop-bands. Having each element characterized with the same parameters, the filtering behavior of the system can be described through the wave propagation properties of the unit cell. This is technologically impossible to obtain, therefore the Lyapunov factor is used, in order to define the mean attenuation of a quasi-periodic structure. Tailoring Gaussian unit cell properties potentially allows to extend the stop-bands width in the frequency domain. A drawback is that some unexpected resonance peaks may lie in the neighborhood of the extended regions. However, the correspondent mode-shapes are localized in a particular region of the structure, and they partially decrease the global attenuating behavior. In this paper, the aperiodicity introduced in the otherwise perfect repetition is investigated, providing an explanation for the mode-localization problem and for the stop-bands extension. Then, the proposed approach is applied to a passive quasi-periodic beam, characterized from a localized peak within a designed band-gap. The geometrical properties of its aperiodic parts are changed in order to deterministically move the localization peak in the frequency response. Numerical and experimental results are compared.
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4

Persans, Peter D., and B. Abeles. "Optical properties of microcrystalline silicon/silicon oxide multilayers." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1987. http://dx.doi.org/10.1364/oam.1987.tuu2.

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We report optical absorption and electroabsorption measurements on silicon microcrystallites with dimensions from 40 to 100 Å. Silicon microcrystals of well-defined dimensions were prepared by thermal annealing of periodic amorphous multilayers consisting of amorphous silicon and silicon dioxide sublayers prepared by plasma-assisted chemical vapor deposition. The crystallite size is controlled by the thickness of the amorphous silicon sublayers. This novel class of material possesses many properties intermediate between bulk crystals and disordered or amorphous materials. Optical absorption for hν < 3 eV is significantly higher than that of bulk crystals possibly due to absorption in interstitial material between crystallites. Relaxation of Δk = 0 crystal momentum rules for optical transitions leads to broadening and shift of critical points in optical modulation spectra. Quantum confinement of electronic states may also lead to energy shifts in optical spectra.
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5

Khoo, I. C., M. Lee, K. Wang, M. Wood, and B. D. Guenther. "Nonlinear Liquid Crystal Optical Fiber Array." In Nonlinear Optics: Materials, Fundamentals and Applications. Washington, D.C.: Optica Publishing Group, 1996. http://dx.doi.org/10.1364/nlo.1996.nthc.3.

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Liquid crystals [LCs] in their various ordered and disordered phases have been shown to possess large optical and electro-optical nonlinearities over wide temporal [cw to picosecond] and spectral [visible to infrared] ranges [1]. Because of their unique physical properties, various novel liquid crystalline structures, such as thin films or pixels with, slab waveguides, LC cored fibers and fiber arrays, could be constructed that will provide superior performance in specific optical switching, imaging and processing applications. In particular, we have previously reported observation of low-threshold stimulated backscattering and optical limiting effects in an isotropic liquid crystal [ILC] cored fibers of centimeters in length [2].
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6

Batay, L. E., V. P. Gribkovskii, A. A. Demidovich, A. A. Kaminskii, A. N. Kuzmin, G. I. Ryabtsev, and W. Strek. "Q-switched microlaser with Nd:La3Ga5,5Nb0.5O14 active medium." In The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1998. http://dx.doi.org/10.1364/cleo_europe.1998.cmc7.

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LD pumped solid state lasers are very attractive for producing of compact systems with different special lasing regimes. In this connection disordered crystals with Ca-gallogermanate structure are one of the most appropriate laser materials with broad (about 4 nm) lasing spectum [1]. Previously it was shown that Nd:La3Ga5.5Nb0.5O14 crystal like other crystals of Ca-gallogermanate group has unique combination of their physical properties [2]. In this research characteristics of LD pumped Q-switched short crystal Nd:La3Ga5.5Nb0.5O14 laser are presented.
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7

Gerdt, L., M. Müller, M. Heidowitzsch, J. Kaspar, E. Lopez, M. Zimmermann, C. Leyens, A. Hilhorst, and P. J. Jacques. "Alloy Design of Feedstock Material for Additive Manufacturing—Exploring the Al-Co-Cr-Fe-Ni-Ti Compositionally Complex Alloys." In ITSC 2023. ASM International, 2023. http://dx.doi.org/10.31399/asm.cp.itsc2023p0414.

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Abstract The need for sustainable use of resources requires continuous improvement in the energy efficiency and development of new approaches to the design and processing of suitable materials. The concept of high entropy alloys (HEAs) has recently been extended to more general compositional complex alloys (CCAs) and multi-principal element alloys (MPEAs). One of the major challenges on the way to application of these alloys is the extensive design and selection efforts due to the great variety of possible compositions and its consequences for workability and resulting material properties. The favorable high-temperature strength of Ni-based and Co-based superalloys is ascribed to a defined γ/γ’ structure consisting of a disordered FCC A1 matrix and ordered L12 γ’ precipitates. In the current work we extended this design concept to CCAs, allowing disordered BCC A2 and ordered B2 phases in additions or in substitution of the original γ/γ’ structure. We used a high-throughput screening approach combining CALPHAD-based computational tools with in situ alloying by means of laser cladding. Wall-type specimens with gradient composition in the system Al-Co-Cr-Fe-Ni-Ti with varying Al, Ti and Cr content were analyzed. The combined modelling and experimental screening approach was demonstrated to be a powerful tool for designing new high performance AM-ready feedstock.
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8

Grosdidier, T., H. L. Liao, and A. Tidu. "X-Rays and TEM Characterization of Nanocrystalline Iron Aluminide Coatings Prepared by HVOF Thermal Spraying." In ITSC 2000, edited by Christopher C. Berndt. ASM International, 2000. http://dx.doi.org/10.31399/asm.cp.itsc2000p1341.

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Abstract FeAl iron-aluminide based materials with the ordered B2 structure are excellent candidates for use in high temperature applications because of the combination of good mechanical properties, low density, low cost and availability of raw materials, and improved oxidation resistance. The aim of this article is to produce an ultra-fine grained FeAl coating by HVOF thermal spraying of milled powders and characterize the fine scale features of its microstructure. Comparison is made with a more conventional coating obtained by projection of powders obtained by atomization. Starting powders and coatings were investigated using X-ray diffraction and transmission electron microscopy. It was observed that the coating obtained from milled powders had a microstructure essentially characterised by a nanometer grain size and the presence of a disordered FeAl phase.
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9

Stemper, Brian D., Derek Board, Narayan Yoganandan, Frank A. Pintar, and Dennis J. Maiman. "Gender Specific Material Properties in the Thoracic Spine." In ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-175541.

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Gender differences have been identified in a variety of spine-related disorders including rates of thoracic sagittal plane scoliosis and rates of whiplash associated disorder following automotive rear impacts. For example, female gender was identified as a main risk factor for thoracic curve progression in adolescent idiopathic scoliosis [1]. Clinical and epidemiological studies have identified females to be more susceptible to whiplash injury [2]. However, biomechanical evidence for these discrepancies has been limited. Experimental investigations using human volunteers and post mortem human head-neck specimens have identified dynamic gender differences in overall head kinematics relative to T1 [3] and segmental and localized spinal kinematics [4, 5] following simulated automotive rear impacts. However, it remains unclear whether dynamic gender differences resulted from anthropometry, or geometrical or structural differences in the head-neck complex and/or cervical spine. Structural gender differences identified in anterior cruciate ligaments of the knee [6] and histological differences identified in the ligamentum flavum of the lumbar spine may indicate possible structural or material gender differences in spinal ligaments [7]. Therefore, the present investigation was conducted to experimentally identify soft tissue structural differences in spinal biomechanics.
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Brodovoi, Alexander V., V. G. Kolesnichenko, Valery V. Skorokhod, V. A. Brodovoi, and Oleg S. Zinets. "Ferromagnetism of structure-disordered surface layers of molybdenum and zinc single crystals." In Fifth International Conference on Material Science and Material Properties for Infrared Optoelectronics, edited by Fiodor F. Sizov. SPIE, 2001. http://dx.doi.org/10.1117/12.417786.

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