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872 Aktuelle Fachpublikationen zum Thema temperature

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Temperature Effects on Micelle Formation and Particle Charging with Span Surfactants in Apolar Media

27.08.2015 | Edward L. Michor; John C. Berg, Langmuir, 2015

This paper examines the effects of temperature on the micellization and particle charging behavior of the Span surfactant series in an apolar environment. The critical micelle concentrations of each of six surfactants at five temperatures were measured by conductometric techniques. The ...

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Dislocation-Mediated Deformation in Solid Langmuir Monolayers: Plastic Bending and Tilt Boundary

27.08.2015 | E. Hatta, Langmuir, 2015

The shear response of three types of textures (mosaic, striation, and stripe) in 10,12-pentacosadiynoic acid solid Langmuir monolayers has been investigated with Brewster angle microscopy. Low temperature mosaic textures respond to an applied stress elastically. Upon the application of shear the ...

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Dye Encapsulation in Polynorbornene Micelles

25.08.2015 | Nia C. Bell; Samantha J. Doyle; Giulia Battistelli; Clare L. M. LeGuyader; Matthew P. Thompson; Ambata M. Poe; Marco ..., Langmuir, 2015

The encapsulation efficiency of high-Tg polynorbornene micelles was probed with a hydrophobic dye 2,6-diiodoboron-dipyrromethene (BODIPY). Changes in the visible absorption spectra of aggregated versus monomeric dye molecules provided a probe for assessing encapsulation. Polynorbornene micelles ...

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Synthesis and Postpolymerization Modification of Thermoresponsive Coatings Based on Pentaerythritol Monomethacrylate: Surface Analysis, Wettability, and Protein Adsorption

24.08.2015 | Yurij Stetsyshyn; Joanna Raczkowska; Andrzej Budkowski; Andrij Kostruba; Khrystyna Harhay; Halyna Ohar; Kamil Awsiuk ..., Langmuir, 2015

Properties of novel temperature-responsive hydroxyl-containing poly(pentaerythritol monomethacrylate) (PPM) coatings, polymerized from oligoperoxide grafted to glass surface premodified with (3-aminopropyl)triethoxysilane, are presented. Molecular composition, chemical state, thickness, and ...

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Shedding of Water Drops from a Surface under Icing Conditions

19.08.2015 | Deepak Kumar Mandal; Antonio Criscione; C. Tropea; A. Amirfazli, Langmuir, 2015

A sessile water drop exposed to an air flow will shed if the adhesion is overcome by the external aerodynamic forces on the drop. In this study, shedding of water drops were investigated under icing conditions, on surfaces with different wettabilities, from hydrophilic to superhydrophobic. A wind ...

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Temperature- and pH-Dependent Shattering: Insoluble Fatty Ammonium Phosphate Films at Water–Oil Interfaces

19.08.2015 | Joe Forth; David J. French; Andrei V. Gromov; Stephen King; Simon Titmuss; Kathryn M. Lord; Mike J. Ridout; Pete J. ..., Langmuir, 2015

We study the films formed by tetradecylamine (TDA) at the water–dodecane interface in the presence of hydrogen phosphate ions. Using Fourier transform infrared spectroscopy (FTIR), interfacial shear rheology, confocal fluorescence microscopy, cryo-scanning electron microscopy (cryo-SEM), and ...

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Phase Transition of Glycolipid Membranes Studied by Coarse-Grained Simulations

19.08.2015 | Raisa Kociurzynski; Martina Pannuzzo; Rainer A. Böckmann, Langmuir, 2015

Glycolipids are important components of biological membranes. High concentrations of glycolipids are particularly found in lipid rafts, which take part in many physiological phenomena. This different partitioning and interaction pattern of glycolipids in the membrane as compared to those of ...

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Probing the Role of Side-Chain Interconnecting Groups in the Structural Hydrophobicity of Comblike Fluorinated Polystyrene by Solid-State NMR Spectroscopy

18.08.2015 | Su-Yeol Ryu; Jae Woo Chung; Seung-Yeop Kwak, Langmuir, 2015

In order to probe the role of side-chain interconnecting groups (−O–, −S–, and −SO2– linkages between the polystyrene (PST) main chain and fluorooctyl side chain) in the hydrophobicity of the comblike fluorinated polystyrenes, the molecular motion and structure of polymers are explored using the ...

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Carbon Nanotube Synthesis Using Coal Pyrolysis

17.08.2015 | Kapil Moothi; Geoffrey S. Simate; Rosemary Falcon; Sunny E. Iyuke; M. Meyyappan, Langmuir, 2015

This study investigates carbon nanotube (CNT) production from coal pyrolysis wherein the output gases are used in a chemical vapor deposition reactor. The carbon products are similar to those using commercial coal gas as feedstock, but coal is a relatively cheaper feedstock compared to high ...

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Stabilization of 1T-MoS2 Sheets by Imidazolium Molecules in Self-Assembling Hetero-layered Nanocrystals

06.08.2015 | Alexander S. Goloveshkin; Ivan S. Bushmarinov; Alexander A. Korlyukov; Mikhail I. Buzin; Vladimir I. Zaikovskii; Nat ..., Langmuir, 2015

We report a facile, room-temperature assembly of MoS2-based hetero-layered nanocrystals (NCs) containing embedded monolayers of imidazolium (Im), 1-butyl-3-methylimidazolium (BuMeIm), 2-phenylimidazolium, and 2-methylbenzimidazolium molecules. The NCs are readily formed in water solutions by ...

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