Bibliografías temáticas / Monolayers

Literatura académica sobre el tema "Monolayers"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 7 de septiembre de 2023

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Artículos de revistas sobre el tema "Monolayers"

1

Baker, MV y J. Landau. "Self Assembled Alkanethiolate Monolayers as Thin Insulating Films". Australian Journal of Chemistry 48, n.º 6 (1995): 1201. http://dx.doi.org/10.1071/ch9951201.

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Simple devices that contain alkanethiolate monolayers sandwiched between conducting films were prepared by fixing a gold film to the surface of an alkanethiolate monolayer (on a gold substrate) with silver paint. These devices, and similar devices that did not contain alkanethiolate monolayers, were tested as resistors in d.c . circuits. The devices that contained octadecanethiolate monolayers had resistances of approximately 1012 Ω, 10 orders of magnitude higher than the resistance of devices that contained no monolayers. Sulfur- terminated alkanethiolate monolayers were prepared by treatment of carboxylic acid-terminated monolayers with vapours of thionyl chloride followed by vapours of hexane-1,6-dithiol. Attempts to use the sulfur-containing groups at the surface of this monolayer as 'molecular glue' to attach a flexible gold film to the surface of the monolayer were unsuccessful.
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2

Takeshita, Naoki, Masanari Okuno y Taka-aki Ishibashi. "Molecular conformation of DPPC phospholipid Langmuir and Langmuir–Blodgett monolayers studied by heterodyne-detected vibrational sum frequency generation spectroscopy". Physical Chemistry Chemical Physics 19, n.º 3 (2017): 2060–66. http://dx.doi.org/10.1039/c6cp07800a.

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Heterodyne-detected vibrational sum frequency generation spectroscopy was used to investigate molecular structures of DPPC monolayers on water (Langmuir monolayer) and monolayers on a fused silica substrate (Langmuir-Blodgett [LB] monolayer).
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3

Lv, Ming-Hao, Chang-Ming Li y Wei-Feng Sun. "Spin-Orbit Coupling and Spin-Polarized Electronic Structures of Janus Vanadium-Dichalcogenide Monolayers: First-Principles Calculations". Nanomaterials 12, n.º 3 (24 de enero de 2022): 382. http://dx.doi.org/10.3390/nano12030382.

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Phonon and spintronic structures of monolayered Janus vanadium-dichalcogenide compounds are calculated by the first-principles schemes of pseudopotential plane-wave based on spin-density functional theory, to study dynamic structural stability and electronic spin-splitting due to spin-orbit coupling (SOC) and spin polarization. Geometry optimizations and phonon-dispersion spectra demonstrate that vanadium-dichalcogenide monolayers possess a high enough cohesive energy, while VSTe and VTe2 monolayers specially possess a relatively higher in-plane elastic coefficient and represent a dynamically stable structure without any virtual frequency of atomic vibration modes. Atomic population charges and electron density differences demonstrate that V–Te covalent bonds cause a high electrostatic potential gradient perpendicular to layer-plane internal VSTe and VSeTe monolayers. The spin polarization of vanadium 3d-orbital component causes a pronounced energetic spin-splitting of electronic-states near the Fermi level, leading to a semimetal band-structure and increasing optoelectronic band-gap. Rashba spin-splitting around G point in Brillouin zone can be specifically introduced into Janus VSeTe monolayer by strong chalcogen SOC together with a high intrinsic electric field (potential gradient) perpendicular to layer-plane. The vertical splitting of band-edge at K point can be enhanced by a stronger SOC of the chalcogen elements with larger atom numbers for constituting Janus V-dichalcogenide monolayers. The collinear spin-polarization causes the band-edge spin-splitting across Fermi level and leads to a ferrimagnetic order in layer-plane between V and chalcogen cations with higher α and β spin densities, respectively, which accounts for a large net spin as manifested more apparently in VSeTe monolayer. In a conclusion for Janus vanadium-dichalcogenide monolayers, the significant Rashba splitting with an enhanced K-point vertical splitting can be effectively introduced by a strong SOC in VSeTe monolayer, which simultaneously represents the largest net spin of 1.64 (ћ/2) per unit cell. The present study provides a normative scheme for first-principles electronic structure calculations of spintronic low-dimensional materials, and suggests a prospective extension of two-dimensional compound materials applied to spintronics.
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Mazzei, Aurora, Patrizia Pagliara, Gianmarco Del Vecchio, Lucia Giampetruzzi, Francesca Croce, Roberta Schiavone, Tiziano Verri y Amilcare Barca. "Cytoskeletal Responses and Aif-1 Expression in Caco-2 Monolayers Exposed to Phorbol-12-Myristate-13-Acetate and Carnosine". Biology 12, n.º 1 (25 de diciembre de 2022): 36. http://dx.doi.org/10.3390/biology12010036.

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The dis(re)organization of the cytoskeletal actin in enterocytes mediates epithelial barrier dys(re)function, playing a key role in modulating epithelial monolayer’s integrity and remodeling under transition from physiological to pathological states. Here, by fluorescence-based morphological and morphometric analyses, we detected differential responses of cytoskeletal actin in intestinal epithelial Caco-2 cell monolayers at two different stages of their spontaneous differentiation, i.e., undifferentiated cells at 7 days post-seeding (dps) and differentiated enterocyte-like cells at 21 dps, upon challenge in vitro with the inflammation-mimicking stimulus of phorbol-12-myristate-13-acetate (PMA). In addition, specific responses were found in the presence of the natural dipeptide carnosine detecting its potential counteraction against PMA-induced cytoskeletal alterations and remodeling in differentiated Caco-2 monolayers. In such an experimental context, by both immunocytochemistry and Western blot assays in Caco-2 monolayers, we identified the expression of the allograft inflammatory factor 1 (AIF-1) as protein functionally related to both inflammatory and cytoskeletal pathways. In 21 dps monolayers, particularly, we detected variations of its intracellular localization associated with the inflammatory stimulus and its mRNA/protein increase associated with the differentiated 21 dps enterocyte-like monolayer compared to the undifferentiated cells.
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Zhang, Bo, Tomas Mikysek, Veronika Cicmancova, Stanislav Slang, Roman Svoboda, Petr Kutalek y Tomas Wagner. "2D GeSe2 amorphous monolayer". Pure and Applied Chemistry 91, n.º 11 (26 de noviembre de 2019): 1787–96. http://dx.doi.org/10.1515/pac-2019-0501.

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Abstract In this paper, GeSe2 thin film and glass ingot were prepared in a layered structure. Subsequently, the 2D amorphous monolayers were achieved from layered thin film and layered glass ingot. The thicknesses of monolayers from thin film range from 1.5 nm to 5 nm. And the thickness of monolayer from glass ingot is 7 μm. The fast cooling of material results in the formation of self-assembled monolayers. In the case of thin film, layers are connected with “bridge”. After doping of Ag, the precipitation of nano particles exfoliates the adjacent monolayers which can be further dispersed by etching of Ag particles. In the case of glass ingot, the composition changes at 1 % between adjacent monolayers, according to EDX (energy-dispersive X-ray spectroscopy) spectra. And the glass 2D monolayer can be mechanically peeled off from the glass ingot.
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HASHIMOTO, YUICHI, KUNIHARU IJIRO, TETSURO SAWADAISHI y MASATSUGU SHIMOMURA. "ELECTRIC CONDUCTIVITY OF NUCLEIC ACID POLYMER MONOLAYER". International Journal of Nanoscience 01, n.º 05n06 (octubre de 2002): 707–11. http://dx.doi.org/10.1142/s0219581x02000930.

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We investigated electric conductivities of poly nucleic acid-amphiphile polyion complex monolayers. The polyion complex monolayers were prepared by spreading of dialkylammonium salt on aqueous solutions of various poly nucleic acids. The complex monolayers were compressed at the air–water interface and transferred on comb-shaped Au-electrode substrates by vertical lifting method. I–T plots of the complex monolayers, which were measured under applying direct voltage, suggested that the complex monolayers were dielectric substances. The I–V plots indicated that the conductivity of the monolayer depended on the species of poly nucleic acids. Based on the ac impedance analysis of those monolayers, the bulk resistance of those monolayers was estimated from the complex impedance plane plots.
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7

Kajiyama, Tisato. "Novel Concepts of the Aggregation Structure of Organic Monolayers on the Surface of Water". MRS Bulletin 20, n.º 6 (junio de 1995): 32–38. http://dx.doi.org/10.1557/s0883769400036952.

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Langmuir-Blodgett (LB) films have been applied to molecular electronics, nonlinear optics, and biosensors. Their useful properties can be accessed by using a defect-free monolayer—the precursor of LB films. In order to prepare a defect-free or defect-diminished monolayer, it is necessary to estimate the molecular arrangements and structural defects in the monolayer. The actual structure of monolayers on the surface of water have been proposed on the basis of recent morphological and structural studies. Molecular-aggregation processes or monolayer-formation processes do not always match the general concept concluded from surface pressure-area (π-A) isotherms. Therefore, a universal understanding has not been reached. Here we present a novel and systematic classification for the aggregation structure of monolayers on the water surface and also demonstrate how to prepare defect-diminished monolayers.
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8

Dickie, Adam J., Ashok K. Kakkar y Michael A. Whitehead. "Molecular modelling of self-assembled alkynyl monolayer structures — Unnatural symmetry units, surface bonding, and topochemical polymerization1". Canadian Journal of Chemistry 81, n.º 11 (1 de noviembre de 2003): 1228–40. http://dx.doi.org/10.1139/v03-110.

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Geometric modelling techniques are used to map the potential energies of packing for self-assembled alkyl- and phenyl-backboned monolayers across a range of intermolecular separations. Natural packing distances of 4.2–4.4 Å produce less stable, more isotropic monolayers because of repulsive interchain contacts. Optimizations at unnatural surface densities found thin films of lower energy and higher symmetry existed at increased chain–chain separations. Head-group bonding is therefore identified as a force for controlling monolayer order. Analysis of the natural monolayer structures on a silicon dioxide surface determined the favourable head-group structures, and allowed the topochemical polymerization of p-bis(butadiynyl)benzene monolayers to be rationalized.Key words: self-assembled monolayers, molecular modelling studies, repeating symmetry units, thin-film order, topochemical polymerization.
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9

Huang, Zhaoming, Kai Ren, Ruxin Zheng, Liangmo Wang y Li Wang. "Ultrahigh Carrier Mobility in Two-Dimensional IV–VI Semiconductors for Photocatalytic Water Splitting". Molecules 28, n.º 10 (16 de mayo de 2023): 4126. http://dx.doi.org/10.3390/molecules28104126.

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Two-dimensional materials have been developed as novel photovoltaic and photocatalytic devices because of their excellent properties. In this work, four δ-IV–VI monolayers, GeS, GeSe, SiS and SiSe, are investigated as semiconductors with desirable bandgaps using the first-principles method. These δ-IV–VI monolayers exhibit exceptional toughness; in particular, the yield strength of the GeSe monolayer has no obvious deterioration at 30% strain. Interestingly, the GeSe monolayer also possesses ultrahigh electron mobility along the x direction of approximately 32,507 cm2·V−1·s−1, which is much higher than that of the other δ-IV–VI monolayers. Moreover, the calculated capacity for hydrogen evolution reaction of these δ-IV–VI monolayers further implies their potential for applications in photovoltaic and nano-devices.
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10

Williams, Ian y Todd M. Squires. "Evolution and mechanics of mixed phospholipid fibrinogen monolayers". Journal of The Royal Society Interface 15, n.º 141 (abril de 2018): 20170895. http://dx.doi.org/10.1098/rsif.2017.0895.

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All mammals depend on lung surfactant (LS) to reduce surface tension at the alveolar interface and facilitate respiration. The inactivation of LS in acute respiratory distress syndrome (ARDS) is generally accompanied by elevated levels of fibrinogen and other blood plasma proteins in the alveolar space. Motivated by the mechanical role fibrinogen may play in LS inactivation, we measure the interfacial rheology of mixed monolayers of fibrinogen and dipalmitoylphosphatidylcholine (DPPC), the main constituent of LS, and compare these to the single species monolayers. We find DPPC to be ineffective at displacing preadsorbed fibrinogen, which gives the resulting mixed monolayer a strongly elastic shear response. By contrast, how effectively a pre-existing DPPC monolayer prevents fibrinogen adsorption depends upon its surface pressure. At low DPPC surface pressures, fibrinogen penetrates DPPC monolayers, imparting a mixed viscoelastic shear response. At higher initial DPPC surface pressures, this response becomes increasingly viscous-dominated, and the monolayer retains a more fluid, DPPC-like character. Fluorescence microscopy reveals that the mixed monolayers exhibit qualitatively different morphologies. Fibrinogen has a strong, albeit preparation-dependent, mechanical effect on phospholipid monolayers, which may contribute to LS inactivation and disorders such as ARDS.
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Tesis sobre el tema "Monolayers"

1

Murdaugh, Anne E. "Epitaxy of Crystal Monolayers". Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/194150.

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Epitaxial growth, or the oriented growth of a crystalline monolayer on an ordered substrate, appears in a wide range of systems and applications, from novel device fabrication to freshwater remediation. Despite this, methodical studies of the phenomenon are rare, and the mechanisms governing epitaxial growth are poorly understood. This investigation employs AFM techniques to monitor the epitaxial growth of ion crystal systems at the initial stages of growth. By using systems with well-known physical properties, we are able to relate growth modes to two key parameters, crystal lattice mismatch, Δr/r₀, and affinity between the overgrowth and the substrate ions, ξ. We found wetting growth occurs for systems in which Δr/r₀ is expansive (overgrowth lattice must expand to accommodate substrate) or mildly compressive (overgrowth compresses to accommodate substrate). Additionally, a strong affinity between the substrate and overgrowth ions, in combination with an expansive system, allows for epitaxial growth from undersaturated solutions. We also have observed several instances where the lateral force contrast on the growing film exhibits a strong dependence on the time of exposure to the growth solution and on the driving force for growth (solute concentration). We present results for three epitaxial growth systems in aqueous solutions: CaSO₃ on CaCO₃, PbSO₄ on BaSO₄, and BaSO₃ on BaSO₄. Chemically and topographically identical regions grown at higher concentrations exhibit higher friction than regions grown at lower concentrations. These observations suggest that epitaxial growth occurs by a fast condensation step incorporating a high defect density.
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2

Ren, Qiang. "Dislocations in monolayers and semiconductors". Thesis, University of Ottawa (Canada), 1995. http://hdl.handle.net/10393/10014.

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Four different aspects of the properties of dislocations in monolayer and semiconductors have been investigated: (i) Using atomic relaxation techniques, dislocation dipoles of various sizes and orientations have been studied for monolayers with the Lennard-Jones potential (LJP) and the nearest-neighbour piecewise linear force (PLF) interactions. In the WP system the lower energy vacancy dipoles have over a wide range of angles an energy which is mainly a function of the vacancy content of the dipole. There is a competition between the elastic forces and the topological constraints which favour a five-fold coordinate vacancy (FCV) at the centre of each core. For the short range PLF system the lattice usually compresses upon the introduction of a dislocation, a consequence of the soft core of the interaction potential, and interstitial dipoles are lower in energy. For the long range LJP system the dislocations are mobile whereas for the PLF system they are pinned. The relevance of these results to existing theories of melting are discussed. (ii) Using generalized stacking-fault (GSF) energies obtained from first-principles density-functional calculations, a zero-temperature model for dislocations in silicon is constructed within the framework of a Peierls-Nabarro (PN) model. Core widths, core energies, PN pinning energies, and stresses are calculated for various possible perfect and imperfect dislocations. Both shuffle and glide sets are considered. 90$\sp\circ$ partials are shown to have a lower Peierls stress (PS) than 30$\sp\circ$ partials in accord with experiment. (iii) We have also studied by atomic relaxation techniques the properties of dislocations in silicon, modelled by the empirical potential of Stillinger and Weber. In order to compare with the preceding calculation no reconstruction is allowed. We find no evidence of dissociation in the shuffle dislocations. Within this model shuffle dislocations glide along their slipping planes. On the other hand, glide sets are shown to glide only in dissociated form. The dislocation displacement fields are essentially planar. The PS is found to be isotropic within the (111) plane. In other words the minimum stress at 0K required to move the dislocation in any direction with in that plane has the same projection unto the Burgers vector, the PS of the dislocation. Our PS are in good agreement with those from (ii). (iv) Using a simple two dimensional UP model, relaxation mechanisms of the epitaxial strain layers (ESL) have been simulated for various misfits and layer thickness. In this model, the relationship of two competing relaxation mechanisms is found. At small misfit, strain is released by nucleating misfit dislocations from the edges of system. This process is more favourable for the thicker layer. At large misfit, stress is relaxed through surface instability, allowing easy generation of misfit dislocations from the surface. Those results are qualitatively in agreement with experiments.
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3

Poirier, Jason S. "Polymer Templating in Surfactant Monolayers". Fogler Library, University of Maine, 2004. http://www.library.umaine.edu/theses/pdf/PoirierJS2004.pdf.

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Casson, Brian Derek. "Phase transitions in surfactant monolayers". Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300797.

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Cheadle, Edward Martin. "Characterisation of self-assembled monolayers". Thesis, University of Leeds, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250878.

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Muslim, Abdul-Mueed. "Computer simulations of surfactant monolayers". Thesis, King's College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248123.

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Nicholls, Joel. "Polyomino models of molecular monolayers". Thesis, University of Warwick, 2017. http://wrap.warwick.ac.uk/98236/.

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In this thesis, we describe periodic 2D supramolecular networks using a simple polyomino model with nearest-neighbour interactions. In particular, we focus on design rules for ordered molecular tilings, describing how the realised molecular tiling depends on the parameters of the system, such as the interactions, molecular shape, temperature, and defects. A major component of our analysis is in keeping the interaction parameters free and exploring the polyomino system from the perspective of the space of interaction counts. The design principles and methods outlined in this thesis include several different themes, which give a complementary view on the properties of 2D supramolecular networks. Within the thesis we describe our algorithm for enumerating polyomino patterns and identifying their symmetries, making use of group theory methods that are specific for polyomino tilings. This information is used to analyse properties such as chirality, lowest energy states, degeneracy, and heat capacity curves, as depending on system parameters. The domino tilings are considered in terms of enumeration by periodicity, and in terms of the kinetically accessible subsets of configurations. The generalisation to polyominoes gives a wider sense in which many of the techniques can be used, showing similarities and some differences with the domino system. A probabilistic version of algorithm DLX is described and tested that allows us to gather sample statistics of domino configurations for larger unit cells. Finally, fixed defects are considered and their effect on the kinetically accessible domino subsets is elucidated.
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Cicuta, Pietro. "Viscoelasticity of insoluble macromolecular monolayers". Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619766.

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Opps, Sheldon B. "Phase behaviour of model Langmuir monolayers". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ47405.pdf.

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Sun, Jizhong. "Molecular dynamics simulation of colloidal monolayers". Thesis, University of Hull, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397087.

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Libros sobre el tema "Monolayers"

1

Mingotaud, Anne-Françoise. Handbookof monolayers. San Diego: Academic Press, 1993.

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Mingotaud, Anne-Françoise. Handbook of monolayers. San Diego: Academic Press, 1993.

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Mingotaud, Anne-Françoise. Handbook of monolayers. San Diego: Academic Press, 1993.

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Mingotaud, Anne-Françoise. Handbook of monolayers. San Diego: Academic Press, 1993.

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Chapman, Dennis. Micelles, monolayers and biomembranes. Chichester: Wiley, 1994.

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Jones, Malcolm N. Micelles, monolayers, and biomembranes. New York: Wiley-Liss, 1995.

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Vogel, Nicolas. Surface Patterning with Colloidal Monolayers. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-35133-4.

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Gelbart, William M., Avinoam Ben-Shaul y Didier Roux, eds. Micelles, Membranes, Microemulsions, and Monolayers. New York, NY: Springer New York, 1994. http://dx.doi.org/10.1007/978-1-4613-8389-5.

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Vogel, Nicolas. Surface Patterning with Colloidal Monolayers. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012.

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W, Gelbart, Ben-Shaul A y Roux D, eds. Micelles, membranes, microemulsions, and monolayers. New York: Springer-Verlag, 1994.

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Capítulos de libros sobre el tema "Monolayers"

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Seeber, Renato, Fabio Terzi y Chiara Zanardi. "Monolayers". En Monographs in Electrochemistry, 105–37. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-45103-8_5.

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Clint, John H. "Insoluble monolayers". En Surfactant Aggregation, 33–58. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2272-6_3.

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Vollhardt, Dieter. "Surfactant Monolayers". En Encyclopedia of Colloid and Interface Science, 1165–201. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-20665-8_163.

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MÖBIUS, DIETMAR. "Organic Photochemical Reactions in Monolayers and Monolayer Systems". En ACS Symposium Series, 113–23. Washington, D.C.: American Chemical Society, 1985. http://dx.doi.org/10.1021/bk-1985-0278.ch008.

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Liu, Yuhong. "Self-assembled Monolayers". En Encyclopedia of Tribology, 2997–3001. Boston, MA: Springer US, 2013. http://dx.doi.org/10.1007/978-0-387-92897-5_483.

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Birdi, K. S. "Lipid-Protein Monolayers". En Lipid and Biopolymer Monolayers at Liquid Interfaces, 209–27. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4899-2525-1_7.

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Scaramuzzo, Francesca A., Mario Barteri, Pascal Jonkheijm y Jurriaan Huskens. "Stimuli-Responsive Monolayers". En Organic Nanomaterials, 347–68. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118354377.ch16.

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Zhu, Yimei, Hiromi Inada, Achim Hartschuh, Li Shi, Ada Della Pia, Giovanni Costantini, Amadeo L. Vázquez de Parga et al. "Self-Assembled Monolayers". En Encyclopedia of Nanotechnology, 2344. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-90-481-9751-4_100736.

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Colbeck, H., B. H. Blott, D. P. Fraser, R. W. Chantrell y D. Melville. "Superdiamagnetism in Lipid Monolayers". En Springer Proceedings in Physics, 34–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-71526-6_7.

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Möbius, D. "Spectroscopy of Complex Monolayers". En Langmuir-Blodgett Films, 223–72. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4899-3716-2_5.

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Actas de conferencias sobre el tema "Monolayers"

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Ang, X. F., H. J. Lu, J. Wei, H. J. Zhang y C. C. Wong. "Organic Monolayers for Low Temperature Copper – Gold Bonding". En ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-38552.

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In this study low temperature copper-gold bonding in ambient is demonstrated successfully with the help of organic monolayers. Further investigation is made to evaluate the influence of chain length of these monolayers to alleviate bonding temperature. We found that a single coat of organic monolayer on copper showed superior bond strength as compared to a double-coating on both copper and gold surfaces respectively. Despite effective surface passivation against oxide formation (Cu) and organic contaminant from ambient (Au) by long chain organic monolayers, when both surfaces are coated with the longest monolayer, weaker bond strength was observed. The results suggest that the ease of removal of organic monolayers from Cu and Au surface respectively prior to bonding plays a dominant role in enabling low temperature Cu-Au bonding.
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Garoff, S., R. B. Hall y D. W. Deckman. "Optical and Electron Probes of the Structure of Surfactant Coated Surfaces". En Microphysics of Surfaces, Beams, and Adsorbates. Washington, D.C.: Optica Publishing Group, 1985. http://dx.doi.org/10.1364/msba.1985.wc1.

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The absorption of a monolayer of amphiphilic or surfactant molecules onto a surface can dramatically affect a number of the macroscopic properties of that surface. These properties, such as wetting by a fluid, lubrication of the solid, or chemical reactions of the surface, are of fundamental as well as technological importance. Our studies have focussed on the molecular scale structure of these monolayers and have attempted to probe how the structure depends on the deposition process used to absorb the monolayers. Further, by studying the molecular aspects of surfactant coated surfaces, we hope to gain insight into the nature of wetting and the other macroscopic phenomena which are profoundly affected by the presence of the surfactant monolayer.
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Ramin, Leyla y Ahmad Jabbarzadeh. "Effect of Loading and Shear Rate on Tribological Behaviour of Dodecanethiol Self Assembled Monolayer on Au(111): A Molecular Dynamic Simulation Study". En STLE/ASME 2010 International Joint Tribology Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ijtc2010-41095.

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Molecular dynamic simulation of nanoscale self assembled monolayers (SAMs) is used to predict the tribological properties of thiol based monolayers attached on Au(111) surfaces. Different loading conditions between 10MPa to 7GPa have been applied to dodecanethiol SHCH2(CH2)10CH3 monolayers to study the molecular structure and physical properties at rest, under loading and under shear. At loads lower than 700MPa, we observe smaller fluctuations in tilt and orientation angles due to a lower level of film compression. Above this critical load, the monolayers backbone starts to compress and a dramatic increase of energy is observed. Film thickness also reduces by 87% as the loading is increased. At loads higher than 5GPa, the SAM monolayer undergoes progressive disorganization resulting in a crushed and disordered system. We have investigated the tribology of the SAM films under various loads and shear rates in the range of 108-1011(s−1). We have found that the friction coefficient increases by increasing the shear rate and decrease by increasing the loading.
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Harrison, J. A., G. T. Gao, G. M. Chateauneuf, J. David Schall, Kevin Van Workum y P. T. Mikulski. "The Tribology of Carbon, Hydrogen, and Silicon-Containing Solid Lubricants (Keynote)". En World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63141.

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Constant temperature molecular dynamics simulations and the adaptive intermolecular reactive empirical bond-order potential energy function [1] (AIREBO) were used to examine the tribology of model self-assembled monolayers (SAMs) attached to diamond substrates. Two types of monolayers were examined. One was composed of alkane chains containing 14 carbons atoms and the other was composed of equal mixtures of 12 and 16 carbon-atom chains. The simulations have yielded unique insight into the origin of the friction differences between the two monolayer systems.
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Maftouni, Negin, M. Amininasab y Farshad Kowsari. "Molecular Dynamics Study of Nanobio Membranes". En ASME 2010 First Global Congress on NanoEngineering for Medicine and Biology. ASMEDC, 2010. http://dx.doi.org/10.1115/nemb2010-13277.

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Molecular models of lipid bilayers have ignored the interface of two monolayers of nanobiomembranes in detail by now, however in this paper a new physical model is proposed based on variation of surface tension in the interface of two monolayers of membrane. Experimental results have shown that some peptides and proteins like antimicrobial peptides and cytotoxins are able to change the shape of — or in some cases to destroy — the bilayer membrane during insertion to external monolayer. All interfaces in nanobiomembrane are liquid-liquid type. In this paper appropriate ensembles to simulate liquid/liquid interfaces are presented with special focus on proper ones for surface tension analysis.
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Cho, H. Jeremy, Shalabh C. Maroo y Evelyn N. Wang. "Characterization of Lipid Membrane Properties for Tunable Electroporation". En ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/mnhmt2012-75321.

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Lipid bilayers form nanopores on the application of an electric field. This process of electroporation can be utilized in different applications ranging from targeted drug delivery in cells to nano-gating membrane for engineering applications. However, the ease of electroporation is dependent on the surface energy of the lipid layers and thus directly related to the packing structure of the lipid molecules. 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) lipid monolayers were deposited on a mica substrate using the Langmuir-Blodgett (LB) technique at different packing densities and analyzed using atomic force microscopy (AFM). The wetting behavior of these monolayers was investigated by contact angle measurement and molecular dynamics simulations. It was found that an equilibrium packing density of liquid-condensed (LC) phase DPPC likely exists and that water molecules can penetrate the monolayer displacing the lipid molecules. The surface tension of the monolayer in air and water was obtained along with its breakthrough force.
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Janisch, Corey, Haomin Song, Chanjing Zhou, Zhong Lin, Ana Laura Elías, Dengxin Ji, Mauricio Terrones, Qiaoqiang Gan y Zhiwen Liu. "MoS2 Monolayers on Nanocavities: Enhanced Light-Matter Interaction within Atomic Monolayers". En CLEO: Science and Innovations. Washington, D.C.: OSA, 2016. http://dx.doi.org/10.1364/cleo_si.2016.sf2e.2.

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Bizios, R., F. A. Blumenstock, P. J. Del Vecchio y A. B. Malik. "PERMSELECTIVITY OF CULTURED ENDOTHELIAL MONOLAYERS: EFFECT OF SIZE AND CHARGE OF THE TRANSPORTED MOLECULES". En XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643351.

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Known molecular size neutral dextrans (molecular weight (MW) range ∼6,000-∼500,000), anionic (dextran sulfate, ∼500,000 MW), and cationic (DEAE-dextran, ∼500,000 MW) were used to determine the permselectivity characteristics of bovine pulmonary arterial endothelial monolayers. The experimental system consisted of two compartments separated by a gelatinized polycarbonate membrane (0.8 μm pore size) on one side of which endothelial monolayers were grown to confluence. Dextran solutions (1 gram %) were prepared in phosphate buffered saline buffer (containing 0.5 gram % serum albumin) and placed on the luminal side. Transendothelial dextran transport at 37°C was studied as a function of time. Dextran concentrations were determined spectrophotometrically using the anthrone method. The results (mean ± S.E.) of the dextran concentrations in the abluminal compartment at 45 minutes are given in the table.The endothelial monolayers markedly restricted dextran transport compared to transport across gelatinized, polycarbonate membranes alone (controls). Furthermore, the results indicate that size and charge of the transported molecules determine the sieving mechanism responsible for their passage across the cultured endothelial monolayer. (Supported by HL32418.)
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Bonner, Richard W. "Dropwise Condensation Life Testing of Self Assembled Monolayers". En 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22936.

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The increasing thermal demand of electronics devices has pushed the limits of current two-phase thermal technologies such as heat pipes and vapor chambers. The most obvious area for thermal improvement is centered around the high heat flux generating chips including improved evaporators, thermal interfaces, etc. However, heat fluxes in the sink/condensing regions have also risen as the size of electronics packages has decreased. One way to reduce the thermal resistance associated with condensation is to promote dropwise condensation. In previous work, the condensation performance improvement using self-assembled monolayer coated surfaces (to promote hydrophobicity) has been shown. However, the question of the life of the self-assembled monolayer coatings needs to be addressed before the technology is adopted, as this has plagued other dropwise condensation coatings in the past. Presented here is a general use of self-assembled monolayer coatings to promote dropwise condensation in electronics device applications, including a summary of recent work regarding dropwise condensation on gradient surfaces. Also presented is experimental data from a life test of self-assembled monolayers on copper and gold plated surfaces. In the life test, the surfaces have been continuously exposed to saturated steam at 60°C. Both surfaces have continued to promote dropwise condensation for over 9 months under conditions representative of heat pipe electronics cooling applications.
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Pillapakkam, Shriram, N. A. Musunuri y P. Singh. "Self-Assembly of Monolayers of Submicron Sized Particles on Thin Liquid Films". En ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-65324.

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In this paper, we present a technique for freezing monolayers of micron and sub-micron sized particles onto the surface of a flexible thin film after the self-assembly of a particle monolayer on fluid-liquid interfaces has been improved by the process we have developed where an electric field is applied in the direction normal to the interface. Particles smaller than about 10 microns do not self-assemble under the action of lateral capillary forces alone since capillary forces amongst them are small compared to Brownian forces. We have overcome this problem by applying an electric field in the direction normal to the interface which gives rise to dipoledipole and capillary forces which cause the particles to arrange in a triangular pattern. The technique involves assembling the monolayer on the interface between a UV-curable resin and another liquid by applying an electric field, and then curing the resin by applying UV light. The monolayer becomes embedded on the surface of the solidified resin film.
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Informes sobre el tema "Monolayers"

1

Regen, S. L. Perforated monolayers. Office of Scientific and Technical Information (OSTI), enero de 1992. http://dx.doi.org/10.2172/5576332.

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Regen, S. L. Perforated monolayers. Office of Scientific and Technical Information (OSTI), diciembre de 1992. http://dx.doi.org/10.2172/6646562.

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Regen, S. Perforated monolayers. Office of Scientific and Technical Information (OSTI), diciembre de 1989. http://dx.doi.org/10.2172/5040930.

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Spence, John C. y Jinsong Wu. Functional Organic Monolayers. Fort Belvoir, VA: Defense Technical Information Center, octubre de 2005. http://dx.doi.org/10.21236/ada440205.

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L, Regen Steven. Perforated monolayers. Final report. Office of Scientific and Technical Information (OSTI), junio de 2000. http://dx.doi.org/10.2172/810332.

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Zawodzinski, T., G. Bar, S. Rubin, F. Uribe y J. Ferrais. Multifunctional self-assembled monolayers. Office of Scientific and Technical Information (OSTI), junio de 1996. http://dx.doi.org/10.2172/254339.

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Dutta, P. y J. B. Ketterson. Structure and shear response of lipid monolayers. Office of Scientific and Technical Information (OSTI), febrero de 1992. http://dx.doi.org/10.2172/5523952.

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Dutta, P. y J. B. Ketterson. Structure and shear response of lipid monolayers. Office of Scientific and Technical Information (OSTI), febrero de 1990. http://dx.doi.org/10.2172/5189708.

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Folkers, J. P., P. E. Laibinis y G. M. Whitesides. Self-Assembled Monolayers of Alkanethiols on Gold: Monolayers Derived From Two Components with Alkane Chains of Different Lengths. Fort Belvoir, VA: Defense Technical Information Center, julio de 1992. http://dx.doi.org/10.21236/ada254901.

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Srinivasan, U., J. D. Foster, U. Habib, R. T. Howe, R. Maboudian, D. C. Senft y M. T. Dugger. Lubrication of polysilicon micromechanisms with self-assembled monolayers. Office of Scientific and Technical Information (OSTI), junio de 1998. http://dx.doi.org/10.2172/671989.

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