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970 Aktuelle Fachpublikationen zum Thema temperature

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Growth Kinetics and Mechanics of Hydrate Films by Interfacial Rheology

21.04.2016 | Bruna C. Leopércio; Paulo R. de Souza Mendes; Gerald G. Fuller, Langmuir, 2016

A new approach to study and understand the kinetics and mechanical properties of hydrates by interfacial rheology is presented. This is made possible using a “double wall ring” interfacial rheology cell that has been designed to provide the necessary temperature control. Cyclopentane and water ...

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Manipulating the Assembly of Spray-Deposited Nanocolloids: In Situ Study and Monolayer Film Preparation

21.04.2016 | Peng Zhang; Gonzalo Santoro; Shun Yu; Sarathlal K. Vayalil; Sebastian Bommel; Stephan V. Roth, Langmuir, 2016

Fabrication of nanoparticle arrays on a substrate is one of the most concerned aspects for manipulating assembly of nanoparticles and preparing functional nanocomposites. Here, we studied in situ the assembly kinetics of polystyrene nanocolloids by using grazing incidence small-angle X-ray ...

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Photoluminescence Mechanism and Photocatalytic Activity of Organic–Inorganic Hybrid Materials Formed by Sequential Vapor Infiltration

20.04.2016 | Halil I. Akyildiz; Kelly L. Stano; Adam T. Roberts; Henry O. Everitt; Jesse S. Jur, Langmuir, 2016

Organic–inorganic hybrid materials formed by sequential vapor infiltration (SVI) of trimethylaluminum into polyester fibers are demonstrated, and the photoluminescence of the fibers is evaluated using a combined UV–vis and photoluminescence excitation (PLE) spectroscopy approach. The optical ...

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Temperature-Dependent Deicing Properties of Electrostatically Anchored Branched Brush Layers of Poly(ethylene oxide)

20.04.2016 | Golrokh Heydari; Eric Tyrode; Ceslav Visnevskij; Ricardas Makuska; Per M. Claesson, Langmuir, 2016

The hydration water of hydrophilic polymers freezes at subzero temperatures. The adsorption of such polymers will result in a hydrophilic surface layer that strongly binds water. Provided this interfacial hydration water remains liquidlike at subzero temperatures, its presence could possibly ...

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Controlling the Vaterite CaCO3 Crystal Pores. Design of Tailor-Made Polymer Based Microcapsules by Hard Templating

18.04.2016 | Natalia Feoktistova; Juergen Rose; Vladimir Z. Prokopović; Anna S. Vikulina; Andre Skirtach; Dmitry Volodkin, Langmuir, 2016

The spherical vaterite CaCO3 microcrystals are nowadays widely used as sacrificial templates for fabrication of various microcarriers made of biopolymers (e.g., proteins, nucleic acids, enzymes) due to porous structure and mild template elimination conditions. Here, we demonstrated for the first ...

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Inverse Leidenfrost Effect: Levitating Drops on Liquid Nitrogen

18.04.2016 | M. Adda-Bedia; S. Kumar; F. Lechenault; S. Moulinet; M. Schillaci; D. Vella, Langmuir, 2016

We explore the interaction between a liquid drop (initially at room temperature) and a bath of liquid nitrogen. In this scenario, heat transfer occurs through film-boiling: a nitrogen vapor layer develops that may cause the drop to levitate at the bath surface. We report the phenomenology of this ...

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Photoinduced and Thermal Relaxation in Surface-Grafted Azobenzene-Based Monolayers: A Molecular Dynamics Simulation Study

14.04.2016 | Dmitry Bedrov; Justin B. Hooper; Matthew A. Glaser; Noel A. Clark, Langmuir, 2016

Extensive atomistic molecular dynamics simulations have been employed to study the structure and molecular orientational relaxation of azobenzene-based monolayers grafted to a solid substrate. Systems with surface coverage of 0.6 nm2/molecule were investigated over a wide temperature range ...

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Thiol Adsorption on and Reduction of Copper Oxide Particles and Surfaces

13.04.2016 | Yiwen Wang; Jisun Im; Jason W. Soares; Diane M. Steeves; James E. Whitten, Langmuir, 2016

The adsorption of 1-dodecanethiol at room temperature and at 75 °C on submicron cuprous and cupric oxide particles suspended in ethanol has been investigated by X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and transmission electron microscopy. Thiol adsorption occurs in all cases ...

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Temperature Response of Rhodamine B-Doped Latex Particles. From Solution to Single Particles

12.04.2016 | Antonin Soleilhac; Marion Girod; Philippe Dugourd; Béatrice Burdin; Julien Parvole; Pierre-Yves Dugas; François Baya ..., Langmuir, 2016

Nanoparticle-based temperature imaging is an emerging field of advanced applications. Herein, the sensitivity of the fluorescence of rhodamine B-doped latex nanoparticles toward temperature is described. Submicrometer size latex particles were prepared by a surfactant-free emulsion polymerization ...

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Reversible Size Modulation of Aqueous Microgels via Orthogonal or Combined Application of Thermo- and Phototriggers

11.04.2016 | Dazril I. Phua; Krisztian Herman; Andreea Balaceanu; Juri Zakrevski; Andrij Pich, Langmuir, 2016

Aqueous microgels that respond orthogonally to external temperature and light stimuli and to a combination of both stimuli were developed. N-Vinylcaprolactam (VCL) was copolymerized with small feed amounts ...

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