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Literatura académica sobre el tema "Films suspendus"

Autor: Grafiati

Publicado: 25 de mayo de 2024

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Artículos de revistas sobre el tema "Films suspendus"

Forsythe, Carlos, Madeleine P. Gordon y Jeffrey J. Urban. "3ω techniques for measurement of volumetric heat capacity and anisotropic thermal conductivity of a solution processable, hybrid organic/inorganic film, Te-PEDOT:PSS". Journal of Applied Physics 131, n.º 10 (14 de marzo de 2022): 105109. http://dx.doi.org/10.1063/5.0079328.

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Measuring the thermal properties of anisotropic films of hybrid materials poses a challenge to existing metrology techniques. We have developed a new approach for measuring the volumetric heat capacity and anisotropic thermal conductivity of these systems using the 3ω method. While there exist many avenues for measuring the thermal properties of thin films, most carry with them difficult requirements such as smooth surfaces or advanced lithography. Here, we present measurements of a film's in-plane and cross-plane conductance and its volumetric heat capacity using relatively simple sample configurations, each requiring a single heater. For the measurement of volumetric heat capacity, we present a new model fitting method, relying on a standard film-on-substrate configuration. For the measurement of in-plane thermal conductance by 3ω, we have developed the use of an embedded micro-wire heater in suspended drop cast films, allowing for a 12 μm wide heater without the need for advanced lithography. We also expose the surprisingly significant effect of thermal radiation in the suspended film measurement and its associated error. Our measurements reveal a large anisotropy in the thermal conductivity of our test material, Te-PEDOT:PSS, of kin-plane/ kcross-plane = 19, consistent with the nanoscale morphology of the material.

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Xiao, Binbin, Mengqing Yin, Wanfa Li, Lingyan Liang, Shixun Dai, Xiaohui Zhang, Wei Wang y Zhaoping Liu. "Significant Enhanced Mechanical Properties of Suspended Graphene Film by Stacking Multilayer CVD Graphene Films". Micromachines 14, n.º 4 (28 de marzo de 2023): 745. http://dx.doi.org/10.3390/mi14040745.

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Suspended graphene film is of great significance for building high-performance electrical devices. However, fabricating large-area suspended graphene film with good mechanical properties is still a challenge, especially for the chemical vapor deposition (CVD)-grown graphene films. In this work, the mechanical properties of suspended CVD-grown graphene film are investigated systematically for the first time. It is found that monolayer graphene film is hard to maintain on circular holes with a diameter of tens of micrometers, which can be improved greatly by increasing the layer of graphene films. The mechanical properties of CVD-grown multilayer graphene films suspended on a circular hole with a diameter of 70 µm can be increased by 20%, and multilayer graphene films prepared by layer-layer stacking process can be increased by up to 400% for the same size. The corresponding mechanism was also discussed in detail, which might pave the way for building high-performance electrical devices based on high-strength suspended graphene film.

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Debrégeas, G., P. Martin y F. Brochard-Wyart. "Viscous Bursting of Suspended Films". Physical Review Letters 75, n.º 21 (20 de noviembre de 1995): 3886–89. http://dx.doi.org/10.1103/physrevlett.75.3886.

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Kubo, Tomoko, Eisuke Tadaoka y Hiromitsu Kozuka. "Formation of silica coating films from spin-on polysilazane at room temperature and their stability in hot water". Journal of Materials Research 19, n.º 2 (febrero de 2004): 635–42. http://dx.doi.org/10.1557/jmr.2004.19.2.635.

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Spin-coating was conducted on single-crystal silicon substrates using a xylene solution of perhydropolysilazane (PHPS) to obtain 0.14-μm-thick PHPS films. The PHPS films obtained were suspended over various acidic and basic solutions at room temperature so that they were exposed to the vapors from the solutions. PHPS-to-silica film conversion was studied by infrared absorption spectroscopy, and the stability of the exposed films in hot water was examined by soaking the films in 80 °C water. The as-deposited PHPS films were found to be dissolved in water. When the PHPS films were suspended over water, the films were partially converted into silica, but the resultant film had low stability in hot water. Higher degrees of PHPS-to-silica conversion and higher stabilities in hot water were found on exposing the PHPS films to basic or acidic vapors. Exposure to highly basic vapors from aqueous solutions of ammonia and ethylamine was significantly effective in PHPS-to-silica film conversion, which provided silica thin films with high stability in hot water.

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BAHR, CHRISTIAN. "INFLUENCE OF DIMENSIONALITY AND SURFACE ORDERING ON PHASE TRANSITIONS: STUDIES OF FREELY-SUSPENDED LIQUID-CRYSTAL FILMS". International Journal of Modern Physics B 08, n.º 22 (10 de octubre de 1994): 3051–82. http://dx.doi.org/10.1142/s0217979294001299.

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Freely-suspended films of smectic liquid crystals can be regarded as membranes consisting of a stack of an integral number of molecular (smectic) layers with the layer planes being parallel to the two free surfaces. Because of their variable thickness (between thousands and only two layers) and the large variety of phase transitions between different smectic phases, freely-suspended films are excellent systems to study the influence of the dimensional cross-over from three to two dimensions on phase transitions. Further, because the free surface of a liquid crystal has a strong ordering effect (contrary to solids which exhibit generally surface-induced disorder), freely-suspended films are well-suited for the study of the effect of enhanced surface order on phase transitions. A review of the corresponding experimental work is given.

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Jugade, Sanket S., Anuj Aggarwal y Akshay K. Naik. "Nanomechanical spectroscopy of ultrathin silicon nitride suspended membranes". European Physical Journal Applied Physics 94, n.º 2 (mayo de 2021): 20301. http://dx.doi.org/10.1051/epjap/2021210068.

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Mechanical properties of a nanomechanical resonator significantly impact the performance of a resonant Nano-electromechanical system (NEMS) device. We study the mechanical properties of suspended membranes fabricated out of low-pressure chemical vapor deposited silicon nitride thin films. We fabricated doubly-clamped membranes of silicon nitride with thickness less than 50 nm and length varying from 5 to 60 μm. The elastic modulus and stress in the suspended membranes were measured using Atomic Force Microscope (AFM)-based nanomechanical spectroscopy. The elastic moduli of the suspended membranes are significantly higher than those of corresponding on-substrate thin films. We observed a reduction in net stress after the fabrication of suspended membrane, which is explained by estimating the thermal stress and intrinsic stress. We also use a mathematical model to study the stress and thickness-dependent elastic modulus of the ultrathin membranes. Lastly, we study the capillary force-gradient between the SiNx suspended membrane-Si substrate that could collapse the suspended membrane.

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Wang, Qin, Ying Liu, Fangsong Xu, Xiande Zheng, Guishan Wang, Yong Zhang, Jing Qiu y Guanjun Liu. "Large-Size Suspended Mono-Layer Graphene Film Transfer Based on the Inverted Floating Method". Micromachines 12, n.º 5 (6 de mayo de 2021): 525. http://dx.doi.org/10.3390/mi12050525.

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Suspended graphene can perfectly present the excellent material properties of graphene, which has a good application prospect in graphene sensors. The existing suspended graphene pressure sensor has several problems that need to be solved, one of which is the fabrication of a suspended sample. It is still very difficult to obtain large-size suspended graphene films with a high integrity that are defect-free. Based on the simulation and analysis of the kinetic process of the traditional suspended graphene release process, a novel setup for large-size suspended graphene release was designed based on the inverted floating method (IFM). The success rate of the single-layer suspended graphene with a diameter of 200 μm transferred on a stainless-steel substrate was close to 50%, which is greatly improved compared with the traditional impregnation method. The effects of the defects and burrs around the substrate cavity on the stress concentration of graphene transfer explain why the transfer success rate of large-size suspended graphene is not high. This research lays the foundation for providing large-size suspended graphene films in the area of graphene high-precision sensors.

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Kats, E. I. y V. V. Lebedev. "Dynamics of freely suspended smectic films". Uspekhi Fizicheskih Nauk 152, n.º 8 (1987): 695. http://dx.doi.org/10.3367/ufnr.0152.198708k.0695.

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Kats, E. I. y V. V. Lebedev. "Dynamics of freely suspended smectic films". Soviet Physics Uspekhi 30, n.º 8 (31 de agosto de 1987): 739–40. http://dx.doi.org/10.1070/pu1987v030n08abeh002945.

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Centkowska, Katarzyna, Elżbieta Ławrecka y Malgorzata Sznitowska. "Technology of Orodispersible Polymer Films with Micronized Loratadine—Influence of Different Drug Loadings on Film Properties". Pharmaceutics 12, n.º 3 (10 de marzo de 2020): 250. http://dx.doi.org/10.3390/pharmaceutics12030250.

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The production of orodispersible films (ODFs) with suspended insoluble drug substances is still a challenge, mainly due to the difficulty associated with achieving a proper homogeneity and mechanical properties of the films. Hypromellose (HPMC) and a mixture of polyvinyl alcohol (AP) and povidone (PVP) were compared in terms of their suitability for ODFs incorporating suspended micronized loratadine (LO) in a concentration range of 10%–40%. In a planetary mixer (Thinky), a uniform dispersion of LO in an aqueous viscous casting solution was obtained. The suspended LO particles caused dose-dependent changes in the viscosity of the casting mass and affected the mechanical quality of ODFs. Drug concentrations higher than 30% reduced the film flexibility and tear resistance, depending on the polymer type. LO films with a thickness of 100 µm disintegrated within 60-100 s, with no significant influence of the LO content in the range 10%–30%. HPMC films, regardless of the drug concentration, met the pharmacopoeial requirements regarding the uniformity of the drug content. AP/PVP films were too elastic, and the drug content uniformity was not achieved. The conclusion is that, using an HPMC matrix, it is possible to obtain a high load of a poorly water-soluble drug (30% of dry film mass corresponds to a dose of 5 mg per 1.5 cm2) in ODFs characterized by proper physical characteristics.

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Tesis sobre el tema "Films suspendus"

KRAUS, ISABELLE. "Etude des films librement suspendus de cristaux liquides thermotropes en phase smectique". Paris 11, 1995. http://www.theses.fr/1995PA112129.

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Les films librement suspendus de cristaux liquides thermotropes en phase smectique sont des systemes lamellaires de taille finie, parfaitement ordonnes, dont les couches, constituees par les molecules mesogenes, sont paralleles aux deux surfaces libres. Le film est tendu sur un cadre rectangulaire possedant deux bords mobiles. Il est raccorde a son support par un surplus de materiaux appele le menisque qui est un reservoir de molecules. Trois quantites caracterisent un film: le nombre de couches n, que l'on peut varier d'une quantite macroscopique (>2000) a seulement 2, la tension tau et le nombre de molecules n contenues dans les couches. Nous etudions les proprietes thermodynamiques de ces membranes smectiques ; et plus particulierement l'influence des parametres tau, n et n sur le diagramme de phases, ainsi que les effets d'une contrainte parallele au plan des couches. La these presente quatre nouvelles methodes experimentales qui permettent de mesurer, a une couche moleculaire pres, l'epaisseur d'une membrane smectique, de varier le nombre de couches un par un, de moduler la tension du film, et d'imposer une contrainte mecanique parallele aux plans des couches smectiques. Trois resultats principaux ont ete obtenus. Premierement, le systeme thermodynamique a considerer lors d'une perturbation mecanique est compose du film et du menisque. Deuxiemement, l'epaisseur du film ainsi que la tension interviennent dans le diagramme de phase de la membrane. Ainsi, nous avons montre, d'une part, que la transition du premier ordre sma/smc#* devenait continue sous une epaisseur critique, estimee a 90 couches pour le compose etudie. D'autre part, nous avons constate qu'une variation de la tension peut induire une transition de phase. Enfin, en comprimant et dilatant le film, nous avons pu estimer la valeur du coefficient d'elasticite parallele au plan des couches dans la phase cristalline smb. Nous avons aussi montre que la valeur du coefficient d'elasticite des phases smectiques est fonction de l'existence ou non d'un angle d'inclinaison des molecules par rapport a la normale aux couches

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PICANO, FREDERIC. "Dislocations coin et transitions d'amincissement dans les films librement suspendus de cristal liquide smectique". Lyon, École normale supérieure (sciences), 2001. http://www.theses.fr/2001ENSL0198.

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Ce travail presente une etude experimentale et theorique des films librement suspendus du cristal liquide 8cb en phase smectique a, ainsi que de leurs dislocations coin. Dans ces films, les couches sont parfaitement ordonnees, paralleles au plan du film, et leur nombre peut varier de seulement 2 (6nm) a plusieurs centaines (quelques m). Ces films constituent des systemes tres interessants pour etudier les effets d'epaisseur finie et les proprietes des dislocations coin en milieu confine. Stabilite des films smectiques : l'etude d'un film smectique doit s'accompagner de l'etude du menisque qui le relie au cadre qui le supporte, et avec qui il peut echanger de la matiere. Nous avons montre que ce menisque a un profil circulaire, qu'il fixe la pression a l'interieur du film et qu'il ne se raccorde pas au plan du film tangentiellement. L'observation de l'angle de raccordement permet une mesure directe des interactions entre les surfaces libres du film. Nous avons ainsi montre qu'a faible epaisseur les surfaces libres s'attirent a cause de la presence d'un exces d'ordre smectique en surface. A cause de cet effet, un film assez mince est stable jusqu'a une temperature superieure a la temperature de transition smectique a - nematique, d'autant plus elevee que le nombre de couches est faible. En chauffant le film lentement nous avons ainsi observe des sequences de transitions d'amincissement. Nous avons explique toutes ces observations experimentales a l'aide d'un modele de type champ moyen de landau - ginzburg - de gennes. Etude des dislocations coin : une analyse de forme de boucles de dislocation dans un film vertical nous a permis de mesurer leur tension de ligne en fonction de l'epaisseur du film et de la temperature. Nous avons aussi etudie les dynamiques de croissance d'une boucle dans un film horizontal et de nucleation grace a une pointe chauffante, ce qui nous a permis de mesurer leur mobilite et de mettre en evidence les echanges de matiere avec le menisque.

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Caillier, François. "Dynamique des dislocations coin et dissipation dans les films librement suspendus de cristal liquide smectique". Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2005. http://tel.archives-ouvertes.fr/tel-00011175.

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Les films librement suspendus de cristal liquide 8CB en phase smectique A sont très stables du fait de leur structure lamellaire. En effet, l'élasticité des couches compense la pression capillaire imposée par le ménisque qui le borde et qui joue le rôle de réservoir de matière. Lors de ce travail, nous nous sommes intéressés à la dynamique de ces films. Nous avons mis en évidence que le ménisque se comporte
comme un réservoir dissipatif.

En régime quasi-statique, lorsque les échanges de matière entre le film et le ménisque sont lents, les écoulements de perméation autour des dislocations coin qui le composent sont à l'origine de sa perméabilité finie. Un modèle hydrodynamique montre que la dissipation est localisée à son entrée, dans la zone bien orientée et qu'elle dépend fortement de l'épaisseur du film. Dans les films fins, le ralentissement des boucles de dislocation et dans les films épais, la dynamique de relaxation de deux ménisques reliés par un même film ont permis de confirmer expérimentalement ce modèle.

La dynamique d'effondrement d'une bulle a permis de caractériser la dissipation dans des régimes d'écoulements plus rapides en mettant en évidence un écart à la loi de Laplace (statique). Les expériences montrent qu'après une étape conduisant à la déstructuration du ménisque, ce qui le rend plus perméable, la bulle peut s'effondrer, la matière s'engouffrant dans le ménisque avec un comportement rhéofluidifiant. De plus, la nucléation et la croissance d'îlots peut rendre le processus moins dissipatif, ce qui est essentiellement observé dans les films fins.

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BRAZOKEKAIA, MARIA. "Vibration des films smectiques librement suspendus. Effets non-lineaires, points diaboliques et oscillateurs auto-ajustables". Paris 11, 1998. http://www.theses.fr/1998PA112175.

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Les cristaux liquides smectiques peuvent former des films librement suspendus analogues aux films de savon. En equilibre, ces films ont une epaisseur homogene. En meme temps, la tension du film reste constante sur toute sa surface. Ainsi, les vibrations des films smectiques librement suspendus avec des amplitudes faibles repondent tout-a-fait aux criteres d'application de la theorie lineaire. Les films smectiques librement suspendus sont tres robustes, et nous pouvons, par le biais d'une excitation periodique, les mettre en vibration avec une amplitude arbitraire. Ainsi, ces films permettent d'etudier experimentalement les vibrations dans le regime non lineaire. Il s'avere que les vibrations avec une forte amplitude provoquent les instabilites du menisque vis a vis de la surface du film ainsi que le mouvement des iles sur sa surface. De plus, il est tout a fait possible d'introduire des objets etrangers dans des films smectiques librement suspendus. Ca peut etre, par exemple, une fibre qui perce le film dans un endroit donne. L'analogie qui existe entre l'equation de schrodinger bidimensionnelle et l'equation d'onde permet de faire l'analogie entre les films smectiques en vibration et les billards quantiques. En particulier, un film smectique en vibration perce par une fibre fine est analogue a un billard quantique avec une perturbation ponctuelle. Ainsi, nous avons pu etudier du point de vue experimental les points diaboliques dans des billards quantiques avec une perturbation ponctuelle, a travers le spectre de resonance des films smectiques appropries. Les films smectiques peuvent supporter sur leur surface une inclusion massive, comme par exemple, une petite bille. Une telle bille est captee par la surface du film, mais elle peut neanmoins glisser librement sur la surface de ce dernier. Le spectre de vibration du film depend de la position de l'inclusion, qui peut elle-meme bouger sous l'effet de ces vibrations. Il s'avere que la bille choisit une telle position que la frequence de la resonance du systeme film+bille corresponde a la frequence de l'excitation.

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Selmi, Mayada. "Textures à la surface libre de cristaux liquides smectiques : étude en géométrie films librement suspendus et sur substrats structurés". Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0098/document.

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Ces travaux concernent l’étude expérimentale des textures se développant dans les ménisques de films smectiques de cristaux liquides thermotropes. Ces fluides complexes nous servent de système modèle pour l’étude des couplages élasto-capillaires qui se manifestent dans certaines conditions par des déformations périodiques de l’interface cristal liquide-air. Dans un premier temps, à partir de l’étude détaillée de la topographie de l’interface par une méthode interférométrique, nous caractérisons les différents types de structures, puis, identifions les principaux paramètres impliqués dans le processus d'apparition des défauts dans le ménisque de films libres suspendus. Ces résultats nous servent de base pour discuter des mécanismes physiques qui génèrent les différents types de défauts observés. Nous regardons en particulier, comment la diminution d’épaisseur de couche associée à une transition de phase va induire une instabilité mécanique responsable de l’apparition des ondulations de l’interface. Dans un deuxième temps, afin d’aller plus loin dans la compréhension des mécanismes, nous avons utilisé des films minces de cristaux liquides déposés sur des substrats solides microstructurés par des plots fabriqués par des techniques photolitographiques. Une telle géométrie permet de générer un ménisque autour de chaque plot et surtout de faire varier un plus grand nombre de paramètres comme par exemple l’ancrage sur le substrat via un traitement chimique de surface. L’ensemble de nos résultats apportent un éclairage nouveau sur la caractérisation et la compréhension des déformations spécifiques aux ménisques de fluides complexes
The present work is an experimental study of the textures that appear in the meniscus of free standing smectic films with thermotropic liquid crystals. These complex fluids serve as model systems to investigate elasto-capillary phenomena which, under certain conditions, manifest themselves through periodic deformations of the liquid crystalair interface. In the first part of the thesis, we focus our attention on meniscus structures whose interfacial topographies are thoroughly characterized thanks to an in-house optical interferometry technique. Our study allows us to identify the main parameters involved in the development of meniscus structures and to discuss the physical mechanisms that are likely to be responsible for their formation. In particular, we show how a phase transition-induced layer shrinkage triggers a mechanical instability leading to interfacial undulations of the smectic free surface. In the second part of the manuscript, we address the case of thin liquid crystal films deposited on solid patterned solid substrates. The latter consist of regular arrays of microposts fabricated through photolithographic techniques. Such a geometry allows a meniscus to be formed around each micropost and makes it possible to examine the influence of other parameters such as the anchoring conditions on the solid substrate. The results gathered so far are able to shed some light on the characterization and the understanding of the specific deformations and textures that appear in the menisci of complex fluids

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Northcutt, Robert. "Suspended Polypyrrole Films Supporting Alamethicin Reconstituted Bilayer Membranes". VCU Scholars Compass, 2012. http://scholarscompass.vcu.edu/etd/2864.

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This thesis presents a novel architecture for a sensing element fabricated from a conducting polymer and a bioderived membrane. The thin film device provides controlled, selective ion transport from a chemical concentration and produces measurable electrical signals, ion storage, and small scale actuation. A chemical gradient applied across a bioderived membrane generates ion flow through protein transporters in the presence of a gating signal. A conducting polymer undergoes ion ingress/egress in the presence of an electrical and chemical potential, which causes a change on the polymers conformal backbone. A ligand (or) voltage gated protein in the bioderived membrane results in ion transport through the bioderived membrane. Integrating the two electroactive materials provides a unique architecture which takes advantage of their similarities in ionic function to produce a device with controlled and selective ion transport. The chemoelectromechanical device is one that couples chemical, electrical, and mechanical potentials through number of ions, dielectric displacement, and strain. The prototype consists of a stacked thin conducting polymer film and bioderived membrane which form three aqueous chambers of varying ionic concentrations. The top chamber contains an electrolytic solution, and the bottom chamber contains deionized water adjacent to the conducting polymer. The current that passes through a conducting polymer for an applied electrical signal is based on the level of doping/undoping and therefore can be used as a method of sensing protein function in the sensing element. This architecture results in a sensing element applicable in real time chemical sensors, volatile organic compound detectors, and bioanalytical sensors. The conducting polymer layer is formed from polypyrrole (PPy) doped with sodium dodecylbenzenesulfonate (NaDBS), and the bilayer lipid membrane is formed from 1,2-diphytanoyl-sn-glycero-3-phosphocholine (DPhPC) reconstituted with the protein alamethicin. The magnitude of current required to span a 175 µm pore was empirically found to be 326.5 A/cm2 and is based on electrode condition, electrode surface area, pyrrole concentration, and electrical potential. A micron-scale pore through a silicon substrate is spanned by a thin PPy(DBS) layer, forming a bridge which supports the bioderived membrane. The bioderived membrane is reconstituted with alamethicin, a voltage-gated protein extracted from trichoderma viride. Ion transport experiments were performed to characterize the PPy(DBS) layer and the bioderived membrane and are represented as electrical equivalents for subsequent analysis. The equivalent impedance of polypyrrole was calculated to be 1.7847±0.1735Ωcm2 and capacitance was calculated to be 1.2673±0.1823µF/cm2. The equivalent impedance of a bioderived membrane was calculated to be 1.654±1.9894MΩcm2, capacitance was calculated to be 1.1221± 0.239µF/cm2, and alamethicin resistance was calculated to be 1.025± 0.7228MΩcm2. Thus, using impedance measurements in the conducting polymer layer, it is proposed that a scaled up sensing element can be fabricated using the suspended polypyrrole supported bioderived membrane.

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Hussein, Sheik Abdulkadir. "Electrokinetic phenomena in aqueous suspended films and foams". Thesis, Loughborough University, 2018. https://dspace.lboro.ac.uk/2134/33718.

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Electrokinetic phenomena in liquid foams is at a junction between two areas. On one side is the investigation of liquid foam drainage, and on the other side is electrokinetics of surface driven flow on solid-liquid interfaces. However, the electrokinetic phenomena in liquid foam films significantly lack understanding. Therefore, the novelty of the thesis is to address the mentioned gap in three stages. The outcome has potential applications in a novel separation approaches of biological molecules such as proteins and DNA. In the first stage, the electrokinetic flow of a sufficiently thick (180 μm) free liquid film was investigated using cationic and anionic surfactants by confocal micron-resolution particle image velocimetry (μ-PIV). The reverse of the surface charge resulted in a shift in charge of the electrical double layer at the free liquid film interface, which caused the direction of the electroosmotic velocity to reverse. In each surfactant type used, the fluid velocity profiles were measured at different depths of the free liquid film (different z-planes). It was found how the fluid velocity varied with depth. Numerical simulations of the electroosmotic flow in the same system were also performed using Finite Element Method to understand the flow dynamics. A reasonably good agreement was found between the numerical simulations and the experimental results validating the model. In the second stage, instead of flow visualisation particles, rhodamine B (RB) and fluorescein isocyanate (FICT) dye were added to the free liquid film. Under the initial conditions of pH 7.2, RB is a neutral dye, and FICT has a -2 charge. Under an imposed electric field pH variations were detected and an interesting flow profile was observed. The CFD model developed earlier (stage one) was modified to include the local pH variation. The behaviour of the simulated pH had a good agreement with the behaviour of the FICT. Further confirmation of local pH variation was undertaken using extra new experiments which also showed a good agreed with the simulation. In the third stage, a liquid foam electrokinetic separation chamber was designed to extend the study to include practical applications. The first challenge was to achieve a stable foam under external electric field. A polymer-surfactant mixture can solve the stability problem. However, the mixture of polymers required an alkaline pH (>9) condition for the polymer mixture to be soluble in the aqueous system. Lectin and tetramethylrhodamine goat anti-rabbit (IgG) protein mixture with different molecular mass to charge ratio (50 kDa and 150 kDa) were injected near the anode. The system was monitored in three location: (a) in a vicinity of the injection region, (b) between the two electrodes and (c) in a vicinity of the cathode. In the region (a), a decay of the luminescence intensity of the fluorescein of the two proteins was noted with varying rate. In region (b), an increase followed by a decrease in fluorescein intensity of the proteins was observed again at a varying rate. In region (c), an increase of the dye concentration was observed and again at a different rate. The observed difference was caused by difference of the electrophoretic velocity of the two proteins. The setup proved that proteins could be separated based on their electrophoretic mobility inside a liquid foam. The findings from the thesis show the ability to manipulate fluid flow within a free liquid film, and inside a liquid foam system by an external DC electric field, is not only interesting academically but has potential application in a novel separation approach of biological molecules and beyond. The result show, with the correct surfactant formulation, it possible to make a stable foam under an electric field which can be set up for separation of proteins using foam electrokinetics.

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van, den Akker Anno. "Anisotropic Thermal Physics in Suspended Black Phosphorus Thin Films". Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1529066181060317.

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Sharma, Sunil K. "Dynamic Light Scattering Studies of Layer Fluctuations in Freely Suspended Smectic Liquid Crystal Films". Kent State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=kent1182907404.

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Khaled, Abdul Rahim Assaad. "Non-isothermal characterization of squeezed thin films in the presence of biofluids and suspended ultrafine particles". Connect to this title online, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1071085983.

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Thesis (Ph. D.)--Ohio State University, 2003.
Title from first page of PDF file. Document formatted into pages; contains xix, 172 p.; also includes graphics. Includes bibliographical references (p. 168-172).

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Libros sobre el tema "Films suspendus"

Krzystek, Waldemar, Jerzy Radziwiłowicz y Krystyna Janda. W zawieszeniu: Suspended. [s.l.]: Zespoły Filmowe Zodiak, 1989.

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Daya, Zahir A. Electroconvection in suspended fluid films. Ottawa: National Library of Canada, 1996.

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Freely suspended liquid crystalline films. Chichester: J. Wiley, 1998.

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Koršič, Igor. Suspended time: An analysis of Bazin's notion of objectivity of the film image. [Stockholm: University of Stockholm], 1988.

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D'Aloia, Adriano. Neurofilmology of the Moving Image. NL Amsterdam: Amsterdam University Press, 2021. http://dx.doi.org/10.5117/9789463725255.

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A walk suspended in mid-air, a fall at breakneck speed towards a fatal impact with the ground, an upside-down flip into space, the drift of an astronaut in the void… Analysing a wide range of films, this book brings to light a series of recurrent aesthetic motifs through which contemporary cinema destabilizes and then restores the spectator’s sense of equilibrium. The ‘tensive motifs’ of acrobatics, fall, impact, overturning, and drift reflect our fears and dreams, and offer imaginary forms of transcendence of the limits of our human condition, along with an awareness of their insurmountable nature. Adopting the approach of ‘Neurofilmology’—an interdisciplinary method that puts filmology, perceptual psychology, philosophy of mind, and cognitive neuroscience into dialogue—, this book implements the paradigm of embodied cognition in a new ecological epistemology of the moving-image experience.

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Menotti, Gabriel. Movie Circuits. NL Amsterdam: Amsterdam University Press, 2019. http://dx.doi.org/10.5117/9789089648907.

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Movie Circuits: Curatorial Approaches to Cinema Technology attempts to grasp media in the making. It delves into the underbelly of cinema in order to explore how images circulate and apparatus crystallize across different material formations. The indisciplinary experience of curators and projectionists provides a means to suspend traditional film studies and engage with the medium as it happens, as a continuing, self-differing mess. From contemporary art exhibitions to pirate screenings, research and practice come together in a vibrant form of media scholarship, built from the angle of cinema’s functionaries — a call to reinvent the medium from within.

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Sonin, A. A. Freely Suspended Liquid Crystalline Films. Wiley & Sons, Incorporated, John, 2000.

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Morris, Stephen William *. Electroconvection in a freely suspended smectic film. 1991.

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Tweedie, James. The Suspended Spectacle of History. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190873875.003.0005.

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This chapter examines both the history of the tableau vivant as an art form and its remarkable revival in the cinema of the late twentieth century. At once a quotation of an existing work of art and an always imperfect copy, the tableau vivant recognizes the persistent power of the original but transforms or parodies its source, creating something new even when it returns to old and familiar models. The chapter charts the development of a cinema of painters in the late twentieth century and identifies the tableau as one of its key strategies precisely because it exists at the threshold between citation and innovation. Focusing on the work of Jean-Luc Godard and especially Derek Jarman’s 1986 film Caravaggio, it emphasizes the archaeological and social possibilities of this return to painting, as filmmakers confront both the aging of cinema and the necessity of radical historical models in a moment of political retrenchment.

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Prawer, S. S. The Blue Angel (Der Blaue Engel). British Film Institute, 2002. http://dx.doi.org/10.5040/9781838712907.

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This comprehensive study reconstructs the production history of The Blue Angel (1930), showing how director Josef von Sternberg's virtuoso visual style was amply supported by an immensely talented team of actors and technicians. It also analyzes the film's aesthetics, and shows how the grave political situation in Germany reverberated in its seemingly airtight world. One of the most famous images in cinema is to be found in the film The Blue Angel (1930). Lola Lola (Marlene Dietrich), in revealing black suspenders, sits on a beer-barrel clasping an upraised knee with both hands while she leans slightly back. Though not Germany's first sound film, it was at the time the most prestigious and expensive by far. Sternberg had been lured back from Hollywood and, together with acting star Emil Jannings and producer Erich Pommer, he set about making an adaptation of Heinrich Mann's novel Professor Unrat. The result is a subtly claustrophobic study of a man's downfall which is a milestone in European cinema.

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Capítulos de libros sobre el tema "Films suspendus"

Kats, E. I. y V. V. Lebedev. "Freely Suspended Films". En Partially Ordered Systems, 110–32. New York, NY: Springer New York, 1994. http://dx.doi.org/10.1007/978-1-4612-4332-8_6.

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Ceuterick, Maud. "Cars: A Micro-analysis of Space and Bodies in Vendredi soir". En Affirmative Aesthetics and Wilful Women, 57–97. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-37039-8_3.

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Abstract While the car traditionally appears as male domain, the haptic aesthetic and poetic forms of Claire Denis’ film Vendredi soir (2002) disconnect cars from masculine power. Through a micro-analysis of the film’s forms, spaces, and bodies, the chapter shows how the film suspends the gendered relationships at play in public and private spaces. In this chapter, Ceuterick emphasises the affirmative aesthetic of the film, which transforms the car into a home, gendered bodies into lived bodies, and intimacy into a passage between real and imaginary.

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Decherney, Peter. "The Power of Participatory and Immersive Filmmaking". En Migration, Displacement, and Higher Education, 195–204. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-12350-4_16.

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AbstractFilmAid Kenya (FAK) runs film schools in refugee camps, and each year FAK trains dozens of young filmmakers in the Kakuma and Dadaab camps. Some FAK graduates go on to work as wedding photographers and freelance video journalists—jobs that have surprising demand in the camps. FAK’s most lasting contribution, however, is empowering young people to tell their personal stories. Many of the beautiful, often surprising, films made by FAK students have gone on to win film festival awards and contribute to the global conversation about refugees. When the films do not find audiences outside the camps, there is a cathartic power in the act of communicating. FAK has also built a creative community within the refugee camps. Students and graduates spend time at the FAK compound on their days off, even when the power supply is routinely suspended, disabling the cameras and editing stations.

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Pleiner, H. y H. R. Brand. "The Undulation Mode of Freely Suspended Liquid Films". En Springer Proceedings in Physics, 295–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84763-9_57.

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Brittain, Victoria. "The Disappeared: Suspended Dreams (1992); Lanterns of Memory (2009)". En Love and Resistance in the Films of Mai Masri, 53–63. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-37522-5_5.

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Gordienko, V. M., M. A. Joukov y A. B. Savel’ev. "Ultrafast Incoherent X-Ray Source Utilizing Ultra Thin Freely Suspended Films". En Applications of High-Field and Short Wavelength Sources, 155–63. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4757-9241-6_25.

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Morris, Stephen W., John R. de Bruyn y A. D. May. "Electroconvection in a Freely Suspended Film of Smectic a Liquid Crystal". En NATO ASI Series, 351–57. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4684-5793-3_35.

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Ragel, Philippe. "Index des films". En Le film en suspens, 216–17. Presses universitaires de Rennes, 2015. http://dx.doi.org/10.4000/books.pur.76632.

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Stannarius, Ralf y Kirsten Harth. "Inclusions in freely suspended smectic films". En Series in Soft Condensed Matter, 361–413. WORLD SCIENTIFIC, 2016. http://dx.doi.org/10.1142/9789814619264_0011.

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Ragel, Philippe. "Remerciements". En Le film en suspens, 7. Presses universitaires de Rennes, 2015. http://dx.doi.org/10.4000/books.pur.137710.

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Actas de conferencias sobre el tema "Films suspendus"

Babaev, V. G., M. S. Dzhidzhoev, V. M. Gordienko, M. A. Joukov, A. B. Savel’ev, A. A. Shashkov, A. P. Tarasevitch y R. V. Volkov. "Overheating of Femtosecond Plasma in Freely Suspended Superthin Films". En Applications of High Field and Short Wavelength Sources. Washington, D.C.: Optica Publishing Group, 1997. http://dx.doi.org/10.1364/hfsw.1997.the35.

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Previously we proposed a new thin film target to obtain femtosecond plasma overheating using artificially limited thermoconductivity [1]. We discussed the results of computer modeling of interaction of superintense femtosecond laser pulse with freely suspended thin carbon film. It was shown that for film thicknesses of 50 nm and less the electron temperature rises up to 500 eV and even higher with decrease in thickness. This causes increase in x-ray yield from H- and He-like C ions. In this paper we present for the first time the experimental results demonstrating the phenomenon for freely suspended carbon films as thin as 20-30 nm. It was obtained that for these superthin films x-ray yield increased more than twofold for p-polarized light. The comparison of the experimental results with predictions of the computer code shows good quantitative agreement and leads to the conclusion that there is threefold overheating of plasma layer up to 500 eV.

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Shin, Hyunsuk y Sungbae J. Lee. "High-yield fabrication technique for mechanically stable suspended-graphene FETs". En Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XX, editado por Wounjhang Park, André-Jean Attias y Balaji Panchapakesan. SPIE, 2023. http://dx.doi.org/10.1117/12.2677202.

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Cohn, Robert W. "Capillary-force-directed self-assembly of suspended nanomechanical structures above the electronic circuit layer". En Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XVI, editado por André-Jean Attias y Balaji Panchapakesan. SPIE, 2019. http://dx.doi.org/10.1117/12.2528466.

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Shirsavar, Reza, Tayebe Saghaei, Mohammad Shirsavar, Mansoure Moeni Rizi, Ahmad Amjadi y M. R. Ejtehadi. "Video: 2D flow in suspended fluid films". En 68th Annual Meeting of the APS Division of Fluid Dynamics. American Physical Society, 2015. http://dx.doi.org/10.1103/aps.dfd.2015.gfm.v0031.

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Langer, Christian, Ralf Stannarius, Alice Becker y Horst Stegemeyer. "Electrohydrodynamic instabilities in freely suspended smectic C films". En Liquid Crystals, editado por Jolanta Rutkowska, Stanislaw J. Klosowicz, Jerzy Zielinski y Jozef Zmija. SPIE, 1998. http://dx.doi.org/10.1117/12.299959.

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Guillet, B., S. Liu, C. Fur, S. Wu, J. M. Routoure, C. Adamo, F. Lemarie, D. Schlom y L. Mechin. "Uncooled suspended bolometers based on La0.7Sr0.3Mn03 thin films". En 2010 35th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2010). IEEE, 2010. http://dx.doi.org/10.1109/icimw.2010.5612391.

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Taechang An, In-tae Kim y Geunbae Lim. "Nitrophenol detection using suspended SWNT films for environmental monitoring". En 2010 Ninth IEEE Sensors Conference (SENSORS 2010). IEEE, 2010. http://dx.doi.org/10.1109/icsens.2010.5690334.

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Przedmojski, Jan. "X-ray and optical investigations of free suspended films". En Liquid and Solid State Crystals: Physics, Technology, and Applications, editado por Jozef Zmija. SPIE, 1993. http://dx.doi.org/10.1117/12.156945.

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FIALKOVSKY, I. V. "SUSPENDED GRAPHENE FILMS AND THEIR CASIMIR INTERACTION WITH IDEAL CONDUCTOR". En Proceedings of the Ninth Conference. WORLD SCIENTIFIC, 2010. http://dx.doi.org/10.1142/9789814289931_0029.

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Woodard, Floyd G. y Thomas Pass. "Role of suspended films in insulated glass units (Invited Paper)". En Optical Materials Technology for Energy Efficiency and Solar Energy, editado por Anne Hugot-Le Goff, Claes-Goeran Granqvist y Carl M. Lampert. SPIE, 1992. http://dx.doi.org/10.1117/12.130493.

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