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Relevant bibliographies by topics / Crystalline ordering

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Academic literature on the topic 'Crystalline ordering'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Crystalline ordering"

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Szlawska, Maria, and Dariusz Kaczorowski. "Antiferromagnetic ordering in single-crystalline Ce2IrSi3." Journal of the Korean Physical Society 62, no. 10 (May 2013): 1564–66. http://dx.doi.org/10.3938/jkps.62.1564.

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Birshtein, Tatiana M., Anna A. Mercurieva, Victor A. Pryamitsyn, and Alexei Polotzkiy. "Liquid-crystalline ordering in polymer brushes." Macromolecular Theory and Simulations 5, no. 2 (March 1996): 215–23. http://dx.doi.org/10.1002/mats.1996.040050204.

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Gaffo, Luciana, Maria J. S. P. Brasil, Fernando Cerdeira, Carlos Giles, and Wania C. Moreira. "The effect of cyclic voltammetry on the crystalline order of PdPc thin films." Journal of Porphyrins and Phthalocyanines 09, no. 02 (February 2005): 89–93. http://dx.doi.org/10.1142/s1088424605000150.

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The degree of crystalline order of evaporated and cast palladium phthalocyanine films was investigated before and after they were submitted to a voltammetric process. X-ray diffraction and UV-vis spectroscopy measurements demonstrated that the electrochemical treatment improves the crystalline quality of the films. The X-ray results revealed an increase of the average size of the crystallites composing the films as well as a decrease in the spacing between the lattice planes in the direction perpendicular to the surface of the film. Optical measurements showed that the electrochemical treatment also introduces an appreciable degree of in-plane ordering. These improvements of crystalline order are observed in both types of films, cast and evaporated, which indicates that the ordering is a direct consequence of the electrochemical treatment and not of the method used for the film deposition.

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CRAWFORD, G. P., and J. W. DOANE. "ORDERING AND ORDERING TRANSITIONS IN CONFINED LIQUID CRYSTALS." Modern Physics Letters B 07, no. 28 (December 10, 1993): 1785–808. http://dx.doi.org/10.1142/s0217984993001818.

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A resurgence of interest in confined liquid crystals has taken place over the past few years because of the availability of well-defined and random-type matrices that can be used to constrain liquid crystalline materials to submicrometer spaces. The main driving force behind many of the studies on confined liquid crystals is their relevance to electrically controllable light-scattering devices. Apart from their electrooptic importance, confined liquid crystals introduce many fascinating surface and finite-size effects which are the subject of this review.

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Fujiwara, Takumi, Takayuki Honma, S. Mizuno, N. Iwafuchi, Yasuhiko Benino, and Takayuki Komatsu. "Order/Disorder Hybrid Structures in Photonic Glass Materials." Advanced Materials Research 11-12 (February 2006): 53–56. http://dx.doi.org/10.4028/www.scientific.net/amr.11-12.53.

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Investigations for space-selected structure ordering from nano-particles to single-crystal patterning in glasses will be described. Transparent crystallization in glass must be the best material solution to obtain novel functional glasses with a permanent second-order optical nonlinearity. We focus on the new functions created by structure ordering in glass by means of laser micro-fabrication for space-selected crystallization. Two topics in our recent experimental results of space-selected structure ordering in glass will be presented as follows: 1) Single crystalline patterning by atom heat laser processing in Sm-doped glasses for optical waveguides with second-order optical nonlinearity, 2) structure ordering of domains in crystallized glass fibers for possible photonic fiber-type devices with active signal processing.

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Li, Minhuan, Yanshuang Chen, Hajime Tanaka, and Peng Tan. "Revealing roles of competing local structural orderings in crystallization of polymorphic systems." Science Advances 6, no. 27 (July 2020): eaaw8938. http://dx.doi.org/10.1126/sciadv.aaw8938.

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Most systems have more than two stable crystalline states in the phase diagram, which is known as polymorphism. Crystallization in such a system is often under strong influence of competing orderings linked to those crystals. However, how such competition affects crystal nucleation and ordering toward the final crystalline state is largely unknown. This is primarily because the competition takes place locally and thus is masked by large positional fluctuations. We develop a unique method to correctly identify local symmetries by removing their distortions due to positional fluctuations. This allows us to experimentally access the spatiotemporal fluctuations of local symmetries at a single-particle level in crystallization of a charged colloidal system near the body-centered cubic–face-centered cubic border. Thus, we successfully reveal the crucial roles of competing ordering in the initial selection of polymorphs and the final grain boundary motion toward the most stable state from a microscopic perspective.

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Červinka, Ladislav. "Medium-range ordering in non-crystalline solids." Journal of Non-Crystalline Solids 90, no. 1-3 (February 1987): 371–81. http://dx.doi.org/10.1016/s0022-3093(87)80446-5.

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Albunia, Alexandra R., Concetta D’Aniello, Gaetano Guerra, Dante Gatteschi, Matteo Mannini, and Lorenzo Sorace. "Ordering Magnetic Molecules within Nanoporous Crystalline Polymers." Chemistry of Materials 21, no. 20 (October 27, 2009): 4750–52. http://dx.doi.org/10.1021/cm902158k.

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Fröhlich, Jürg, and Charles-Edouard Pfister. "Absence of crystalline ordering in two dimensions." Communications in Mathematical Physics 104, no. 4 (December 1986): 697–700. http://dx.doi.org/10.1007/bf01211072.

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Nyrkova, Irina A., Nadezhda P. Shusharina, and Alexei R. Khokhlov. "Liquid-crystalline ordering in solutions of polyelectrolytes." Macromolecular Theory and Simulations 6, no. 6 (November 1997): 965–1006. http://dx.doi.org/10.1002/mats.1997.040060602.

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Dissertations / Theses on the topic "Crystalline ordering"

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Liivat, Anti. "Ordering in Crystalline Short-Chain Polymer Electrolytes." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7853.

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Wang, Jingbo [Verfasser]. "Hierarchical ordering : self-assembly of block copolymers in active liquid crystalline matrices / Jingbo Wang." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2013. http://d-nb.info/1030383464/34.

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Khanal, Kiran. "Liquid-Crystalline Ordering in Semiflexible Polymer Melts and Blends: A Monte Carlo Simulation Study." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1373901748.

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Wu, Liang. "Modelling liquid crystalline ordering in anisotropic and inhomogeneous fluids : from simple models of rod- and disc-like particles to polypeptides." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/14620.

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A liquid crystal (LC) is a substance that exhibits phases intermediate between a crystal and a disordered liquid state. LCs have attracted longstanding research interest because of their potential commercial applications in opto-electronics, pharmaceuticals and surfactants but also because ordered soft matter is prevalent in bio-molecular systems such as DNA and lipid cell membranes. In liquid-crystalline systems, both molecular shape and asymmetric attractive interactions contribute to the formation and ultimate stability of anisotropic phases. The research outlined in this thesis provides a fundamental understanding of these systems by developing theoretical models and undertaking detailed molecular simulation studies. In the first part of this thesis, prototype oblate models for LCs are studied: cut spheres and cylindrical discs. Coupled with a scaled Onsager approach, a general equation of state (EoS) for hard-core discotic LCs is developed that allows for an accurate description of the isotropic and nematic phases of oblate discs by introducing a correction to incorporate the negative contributions from high-order virial coefficients. Combining the above mentioned approach with an extended cell approach, the isotropic-nematic-columnar phase diagram of cut spheres is determined. The accuracy of the EoS is assessed by comparison with the more traditional Parsons-Lee description and existing simulation data. Although the anisotropic athermal hard-body fluid is a reasonable representation of lyotropic or colloidal LCs, for thermotropic LC systems temperature plays a key role. In the second part of this thesis a model of hard-core particles incorporating additional anisotropic attractive interactions is proposed to describe thermotropic LCs. Based on a perturbation theory and the Onsager-Parsons-Lee approach, a van der Waals-type (meanfield level) theory of attractive hard-core particles is formulated in a compact algebraic form. The phase diagrams of model attractive prolate (spherocylinder) and oblate (cylindrical disc) molecules are calculated in order to examine the separate effects of molecular shape and anisotropic attractive interactions. As a practical example, a coarse-grained model comprising an attractive spherocylinder is employed to describe phase behaviour of solutions of the polypeptide poly-(γ-benzyl-L-glutamate) (PBLG) in dimethylformamide (DMF). Quantitative agreement between the results obtained from the EoS and experimental data is obtained. In the final part of the thesis, a detailed Monte Carlo (MC) simulation study of athermal mixtures of hard spherocylinders and hard spheres between two well separated parallel hard walls is performed. A combination of constant volume (canonical ensemble) and constant (normal) pressure (isobaric-isothermal ensemble) simulations are carried out. With these simulations, the bulk phase behaviour as well as surface-induced LC ordering are explored. The phase diagram of binary mixtures of hard spherocylinders and hard spheres is presented and is compared with the predictions of the one-fluid Parsons-Lee and many-fluid theories. Rich phase behaviour is exhibited on the surface of the walls: drying (de-wetting), isotropic wetting, and nematic wetting are all observed. A previously unreported entropy-driven transition from a bulk nematic state to a homeotropic smectic surface ordering (with particles arranged in a perpendicular orientation relative to the surface plane) is seen in for both the pure hard rod system and the mixture of hard rods and hard spheres as the density is increased (high pressure states).

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Kress, Oliver Herbert [Verfasser], Tanya [Akademischer Betreuer] Ostapenko, Jörg [Gutachter] Enderlein, and Simone [Gutachter] Techert. "The Viscoelastic Response of Liquid Crystalline Fibers Formed By Bent-core Molecules : From Microscopic Ordering to Macroscopic Behavior / Oliver Herbert Kress ; Gutachter: Jörg Enderlein, Simone Techert ; Betreuer: Tanya Ostapenko." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2019. http://d-nb.info/1200209176/34.

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Heitkam, Sascha. "Manipulation of liquid metal foam with electromagnetic fields : a numerical sudy." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112102.

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La mousse métallique a des propriétés mécaniques et thermodynamiques uniques qui pourraient s'avérer utiles dans de nombreux domaines, tels que la construction légère et ingénierie automobile. Cependant, la mousse métallique n'est pas encore établie en génie.Une des raisons sont les difficultés et les prix élevés dans le processus de fabrication. Causée par drainage gravitaire en état liquide, peuvent se produire des distributions de matériel non homogènes. En outre, dépassant le drainage peut provoquer rupture de bulle et la génération de soufflures. Ces effets négatifs potentiellement peuvent être évités en ajoutant magnétique ou champs électromagnétiques au cours du processus de génération.Dans cette thèse, l'influence de ces champs est donc étudié en réalisant la phase de résolution des simulations. Ces simulations sont effectuées avec le code interne premier. Une modification de la modélisation de la collision était nécessaire pour enquêter sur l'agglomération de bulles dans le métal liquide.Calcul d'une configuration statique-drainage, les mécanismes de l'agglomération sont étudiés sans la présence de champs électriques ou magnétiques. Aux vitesses élevées de drainage, les bulles flottent. À des vitesses inférieures de drainage, les bulles s'agglomèrent dans la partie supérieure du domaine, formant des structures cristallines compacte.La préférence expérimentalement bien connue de commande cubes axés sur le visage, plus hexagonale compacte vous passez votre commande de volume égal bulles est reproduit numériquement. Appliquant davantage des simulations et expériences, un mécanisme de l'instabilité de la commande de façon hexagonale compacte est identifié, ayant pour résultat la préférence de commande de cubes axés sur le visage.Afin de déterminer les propriétés mécaniques de la mousse métallique solide avec la fraction de gaz faibles et aux fonctionnalités avantageuses et désavantageuses d'état d'arrangements de bulle, simulations par éléments finis de la mousse métallique solide avec cavités sphériques sont réalisées et comparées. Une influence significative de la quantité de cristaux de bulle sur la mécanique de la mousse se trouve. Le type de l'ordre cristallin est moins important.On étudie l'influence d'un champ magnétique horizontal sur l'agglomération de bulle. La résistance de drainage peut être augmentée sensiblement en ajoutant un champ magnétique. La structure résultante des bulles est moins sensible à un champ magnétique.Combinant un courant électrique horizontal et une perpendiculaire, champ magnétique horizontal se traduit par une force verticale de Lorentz. Cette force peut équilibrer la gravitation et donc, provoquer la rotation des bulles. Simuler cet État révèle une distribution homogène de bulle. Dans le même temps, friser les champs de force dans le voisinage de chaque bulle induire un mouvement continu en remuant. Petit champ électromagnétique forces n'empêchent pas les bulles d'agglomération, mais peuvent varier le montant de la commande cristallisé et par conséquent, les propriétés mécaniques de la mousse solide qui en résulte.En conclusion, un champ magnétique horizontal augmente la résistance de drainage, tandis que sa combinaison avec un courant électrique provoque des distributions de bulle homogène et peut modifier la structure de la mousse et la fraction de gaz. Les résultats de cette thèse pourraient aider à améliorer le processus de fabrication industrielle de mousse métallique ou même permettre la production de métal poreux avec la fraction de gaz définie par l'utilisateur
Metal foam has unique mechanical and thermodynamic properties which could prove useful in many fields, such as light-weight construction and automotive engineering. However, metal foam is not yet established in engineering. One reason are the difficulties and high prices in the fabrication process. Caused by gravity-driven drainage in liquid state, inhomogeneous material distributions can occur. Also, exceeding drainage might cause bubble rupture and the generation of blow-holes. These negative effects potentially can be avoided by adding magnetic or electromagnetic fields during the generation process. In this thesis, the influence of these fields is therefore investigated by conducting phase resolving simulations. These simulations are carried out with the in-house code PRIME. A modification of the collision modelling was necessary in order to investigate the agglomeration of bubbles within liquid metal. Computing a static-drainage setup, the agglomeration mechanisms are investigated without the presence of electric or magnetic fields. At high drainage velocities the bubbles float. At lower drainage velocities the bubbles agglomerate in the upper part of the domain, forming close-packed crystalline structures. The experimentally well known preference of face-centred cubic ordering, over hexagonally close-packed ordering of equal-volume bubbles is reproduced numerically. Applying further simulations and experiments, an instability mechanism of hexagonally close-packed ordering is identified, resulting in the preference of face-centred cubic ordering. In order to determine the mechanical properties of solid metal foam with low gas fraction and to state advantageous and disadvantageous features of bubble arrangements, Finite-Element simulations of solid metal foam with spherical voids are carried out and compared. A significant influence of the amount of bubble crystals on the foam mechanics is found. The type of the crystalline ordering is less important. The influence of a horizontal magnetic field on the bubble agglomeration is investigated. The drainage resistance can be increased significantly by adding a magnetic field. The resulting structure of the bubbles is less sensitive to a magnetic field. Combining a horizontal electric current and a perpendicular, horizontal magnetic field results in a vertical Lorentz force. This force can balance gravitation and thus, cause rotation of the bubbles. Simulating this state reveals a homogeneous bubble distribution. At the same time, curling force fields in the vicinity of each bubble induce a continuous stirring motion. Small electromagnetic field strengths do not prevent the bubbles from agglomerating, but can vary the amount of crystallized ordering and therefore, the mechanical properties of the resulting solid foam. In conclusion, a horizontal magnetic field increases the drainage resistance, while its combination with an electric current causes homogeneous bubble distributions and can alter the foam structure and the gas fraction. The results of this thesis could help improve the industrial fabrication process of metal foam or even allow production of porous metal with user-defined gas fraction

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Aristoff, David Gregory. "Ordering in dense packings." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-05-2800.

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We examine various models of soft matter, and one model of quasicrystals, focusing on abrupt changes as density is varied. We consider in detail two models, one of granular matter and another of confined wires, showing that the models become ordered as density is increased, with crystalline order observed in the former and nematic order observed in the latter. We associate the phenomenon of random close packing with the onset of crystalline order in our granular model, and we conjecture that crumpled wires should exhibit a nematic transition with increasing compaction. We also consider two other models of granular matter: one which describes dilatancy onset as a second order phase transition, and one which describes random loose packing as a precise, well- defined density. Finally, we examine an equilibrium model of quasicrystals with a first order phase transition to a solid phase without any crystalline order.
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Chian, Ian-Wei, and 錢彥瑋. "An Ordering Evolution of Segregated Layer Stacking in a Series of Side-Chain Liquid Crystalline Aromatic Polyimides Connected with Cyanobiphenyl Side Groups." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/51272583576130779053.

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碩士
國立成功大學
材料科學及工程學系碩博士班
96
For a series of designed side-chain liquid crystalline polyimides different only in the length of aliphatic spacer, abreacted as BPDA-nCBBP, the linkage of liquid crystal phase structural features to the crystal growth is studied in this research. An anisotropic ordered pattern with large stacking periodicity in liquid crystal phase was recognized by two-dimensional X-ray diffraction patterns. The separation of cyanobiphenyl side groups and backbones into disparate sheet-type molecular entities arising with a specific stacking sequence was derived accordingly. The role of aliphatic spacer in the construction of liquid crystal phase, including stacking regularity and stability, has been analyzed through a two-step melting process, which further reveals the nature of liquid crystal phase. In the fiber sample, this liquid crystal phase can further develop into an orthorhombic crystal phase constituted by highly anisotropic unit cells. A molecular packing model derived according to the stacking sequence of sheet-type entities in the liquid crystal phase is able to interpret the packing features of orthorhombic phase. As this orthorhombic phase transferred to a crystalline phases which have low symmetry and big unit cell, these packing features were preserved, which suggested a possible pathway for structural evolution.

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Books on the topic "Crystalline ordering"

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Japan), OUMS'93 (1993 Osaka. Ordering in macromolecular systems: Proceedings of the OUMS'93, Toyonaka, Osaka, Japan, 3-6 June 1993. Berlin: Springer-Verlag, 1994.

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Teramoto, Akio. Ordering in Macromolecular Systems: Proceedings of the OUMS'93 Toyonaka, Osaka, Japan, 3-6 June 1993. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994.

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Teramoto, A., and M. Kobayashi. Ordering in Macromolecular Systems: Proceedings of the Oums'93 Toyonaka, Osaka, Japan, 3-6 June 1993. Springer, 1994.

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Book chapters on the topic "Crystalline ordering"

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Fujimoto, Minoru. "Statistical Theories of Binary Ordering." In Thermodynamics of Crystalline States, 49–60. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-6688-9_4.

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Fujimoto, Minoru. "Mean-Field Theories of Binary Ordering." In Thermodynamics of Crystalline States, 55–66. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-5085-6_4.

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Hikosaka, M., K. Mabuchi, K. Yonetake, T. Masuko, G. Ungar, and V. Percec. "“Liquid Crystallization” Mechanism of Liquid Crystalline Polymers." In Ordering in Macromolecular Systems, 89–97. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78893-2_8.

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Huang, Wenyi. "Combined Main-Chain/Side-Chain Liquid Crystalline Polymers: Synthesis and Supramolecular Ordering." In Liquid Crystalline Polymers, 363–89. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-22894-5_12.

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Sato, Takahiro, and Akio Teramoto. "Phase Equilibria in Liquid Crystalline Polymer Solutions: Theory and Experiment." In Ordering in Macromolecular Systems, 155–69. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78893-2_13.

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Kimura, Hatsuo. "Statistical Theory of Liquid Crystalline Orderings in Hard Rod Fluids." In Ordering in Macromolecular Systems, 125–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78893-2_11.

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Larson, R. G., J. Promislow, S. G. Baek, and J. J. Magda. "The Rheology of PBLG Liquid Crystalline Polymers at High Concentrations." In Ordering in Macromolecular Systems, 191–201. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78893-2_16.

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Kim, Dong-Won, Jung-Ki Park, and Kwan-Soo Hong. "Study on the Orientational Order of the Main Chain Liquid Crystalline Polymers." In Ordering in Macromolecular Systems, 115–24. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78893-2_10.

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Tashiro, Kohji, and Masamichi Kobayashi. "Order-Disorder Transitions in Crystalline Polymers with Characteristic Mechanical and Electric Properties." In Ordering in Macromolecular Systems, 17–34. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78893-2_2.

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Steeb, S., and P. Lamparter. "Investigation of Order-Disorder in Non-Crystalline Binaries Using Diffraction Methods." In Ordering and Disordering in Alloys, 336–47. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2886-5_35.

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Conference papers on the topic "Crystalline ordering"

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Mohan Babu, T. V. S. M., C. Bansal, and S. N. Kaul. "Evidence for reentrant behavior in the crystalline compound Fe2MnSi." In Ordering disorder: Prospect and retrospect in condensed matter physics. AIP, 1992. http://dx.doi.org/10.1063/1.44699.

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Yoo, Hyung Keun, Youngwoon Yoon, Kiejin Lee, Chul Kang, In-Wook Hwang, Chul-Sik Kee, and Joong Wook Lee. "Transport property of organic semiconductor dependent on crystalline ordering." In 2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2013). IEEE, 2013. http://dx.doi.org/10.1109/irmmw-thz.2013.6665841.

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Srivastava, S. L., and R. Dhar. "Disordering by γ-irradiation on long range order of liquid crystalline phases of cholesteryl esters." In Ordering disorder: Prospect and retrospect in condensed matter physics. AIP, 1992. http://dx.doi.org/10.1063/1.44695.

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GALLEGO, L. J., C. REY, J. GARCIA-RODEJA, R. C. LONGO, and M. M. G. ALEMANY. "A MOLECULAR DYNAMICS STUDY OF THE STRUCTURES AND ORDERING TENDENCIES OF 26-ATOM Ni-Al CLUSTERS USING THE EMBEDDED ATOM MODEL." In Proceedings of the Fifth International Workshop on Non-Crystalline Solids. WORLD SCIENTIFIC, 1998. http://dx.doi.org/10.1142/9789814447225_0069.

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Boutaous, M’hamed, Zakariaa Refaa, Shihe Xin, and Dennis A. Siginer. "Understanding the Crystallization of PLA Effects of Temperature and Shearing Conditions." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-68213.

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Processing conditions of polymers governs the final part properties; in fact the thermomechanical history subjected by the polymer affects directly the crystalline microstructure and the crystallinity. In this work we aim to draw a global view about the crystallization kinetics and crystalline morphology of Polylactide (PLA). Unfortunately, the crystallization kinetics of PLA is very slow and limits the possibility to extend its application in several industrials domains. The enhancement of the PLA crystallization kinetic can be obtained by addition of nucleating agents of by ordering the molecular chains during flow, as in processing conditions. In this paper, we propose to highlight the competition between several parameters, as the shear rate, the temperature kinetics and the shearing time.

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Fang, Jin, Laurent Pilon, Chris B. Kang, and Sarah H. Tolbert. "Thermal Conductivity of Ordered Mesoporous Silicon Thin Films Made From Magnesium Reduction of Polymer Templated Silica." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64784.

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This paper reports the cross-plane thermal conductivity of ordered polycrystalline mesoporous silicon thin films between 30 and 320 K. The films were produced by a combination of evaporation induced self-assembly (EISA) of mesoporous silica followed by magnesium reduction. The periodic ordering of pores in mesoporous silicon was characterized by a combination of 1D X-ray diffraction, 2D small angle X-ray scattering, and direct SEM imaging. The average crystallite size, porosity, and film thickness were about 13–18 nm, 25–35%, and 140–260 nm, respectively. The pores were arranged in a face-centered cubic lattice. Finally, the cross-plane thermal conductivity of the meso-porous silicon thin films was measured using the 3ω method. The measured thermal conductivity was about 3 to 5 orders of magnitude smaller than that of the bulk dense crystalline silicon for the temperature range considered. The effects of temperature and film thickness on the thermal conductivity were investigated.

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Wang, Mu, Dajun Shu, Ruwen Peng, and Naiben Ming. "Nucleation-Mediated Lateral Growth of Crystalline Islands on Foreign Substrate: an Origin of Long-Range Ordering in Pattern Formation." In PERSPECTIVES ON INORGANIC, ORGANIC, AND BIOLOGICAL CRYSTAL GROWTH: FROM FUNDAMENTALS TO APPLICATIONS: Basedon the lectures presented at the 13th International Summer School on Crystal Growth. AIP, 2007. http://dx.doi.org/10.1063/1.2751929.

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Balasubramanian, Ganesh, Soumik Banerjee, and Ishwar K. Puri. "Interfacial Thermal Resistance in Nanoscale Heat Transfer." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-69152.

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We investigate nanoscale thermal transport across a solid-fluid interface using molecular dynamics simulations. Cooler fluid argon (Ar) is placed between two heated iron (Fe) walls, thereby imposing a temperature gradient within the system. Fluid-fluid and solid-fluid interactions are modeled with Lennard-Jones potential parameters, while Embedded Atom Method (EAM) is used to describe the interactions between solid molecules. The Fe-Ar interaction causes ordering of fluid molecules into quasi-crystalline layers near the walls. This causes temperature discontinuity between these solid-like Ar molecules and the adjacent fluid. The time evolution of the interfacial (Kapitza) thermal resistance (Rk) and Kapitza length (Lk) are observed. The averaged Kapitza resistance (Rk,av) varies with the initial temperature difference between the wall and the fluid (ΔTw) as Rk,av∝ΔTw−0.82.

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9

Chae, Inseok, Amira Meddeb, Zoubeida Ounaies, and Seong H. Kim. "Tailoring and Characterization of the Liquid Crystalline Structure of Cellulose Nanocrystals for Opto-Electro-Mechanical Multifunctional Applications." In ASME 2018 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/smasis2018-8016.

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Liquid crystalline (LC) behaviors of cellulose nanocrystal (CNC), derived from wood, cotton or other cellulose-based biopolymers, have been actively investigated due to their unique optical properties and their superb mechanical properties, which open up potential applications in bioelectronics and biomedical engineering. In particular, many attempts have been made to control phase and orientation of LC-CNCs because they are critical factors deciding optical and mechanical properties, and electromechanical performances. Through the applications of mechanical force, electric field and magnetic field, some degree of success has been achieved; however, realizing homogeneous arrangements of CNCs that can be exploited at the macroscale is still elusive, owing to a variety of intermolecular interactions. The characterizations of the LC phase and orientation of CNCs are also challenging due to their complex biological structures. In this report, we introduce approaches to control the phase and orientation of LC-CNCs through the self-assembly, mechanical force and electric field. The liquid crystalline behaviors of CNCs in polar solvents and at the air/water interface are discussed. Translational and rotational behaviors of CNCs under DC electric field are also investigated as a function of their surface charge and dipole moment. In addition, we introduce a nonlinear optical process, namely, sum frequency generation (SFG) spectroscopy, for the structural characterization of LC-CNCs. Using SFG, we can analyze not only crystal phase and structure, but also polar ordering of CNCs which plays a key role in determining their electromechanical performances. Development of cellulose-based smart materials will expand the spectrum of available functional materials that are lightweight, flexible, mechanically tough, and thermally stable at moderately high temperatures (up to 300°C).

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Fujiwara, Takumi, Shintaro Mizuno, Tsuyoshi Honma, Yasuhiko Benino, Takayuki Komatsu, and Ryuji Sato. "Photo-induced structure ordering in crystallized glass from nano-particles to single-crystal patterning." In SPIE Proceedings, edited by Isamu Miyamoto, Henry Helvajian, Kazuyoshi Itoh, Kojiro F. Kobayashi, Andreas Ostendorf, and Koji Sugioka. SPIE, 2004. http://dx.doi.org/10.1117/12.595719.

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Reports on the topic "Crystalline ordering"

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Schiffer, J. P. Nature of ordering in confined crystalline ionic systems. Office of Scientific and Technical Information (OSTI), August 1995. http://dx.doi.org/10.2172/166361.

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