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Enhanced Ag+ Ion Release from Aqueous Nanosilver Suspensions by Absorption of Ambient CO2

08-May-2015 | Kakeru Fujiwara; Georgios A. Sotiriou; Sotiris E. Pratsinis, Langmuir, 2015

Nanosilver with closely controlled average particle diameter (7–30 nm) immobilized on nanosilica is prepared and characterized by X-ray diffraction, N2 adsorption, and transmission electron microscopy. The presence of Ag2O on the as-prepared nanosilver surface is confirmed by UV–vis spectroscopy ...


Self-Assembled Monolayers on a Ferromagnetic Permalloy Surface

08-May-2015 | Michele Mattera; Ramón Torres-Cavanillas; Juan P. Prieto-Ruiz; Helena Prima-García; Sergio Tatay; Alicia Forment-Ali ..., Langmuir, 2015

Self-assembled monolayers (SAMs) are nowadays broadly used as surface protectors or modifiers and play a key role in many technological applications. This has motivated the study of their formation in all kind of materials; however, and despite the current interest in molecular spintronics, the ...


MoS2 Nanoparticles Decorating Titanate-Nanotube Surfaces: Combined Microscopy, Spectroscopy, and Catalytic Studies

07-May-2015 | Sara Cravanzola; Lucia Muscuso; Federico Cesano; Giovanni Agostini; Alessandro Damin; Domenica Scarano; Adriano Zecchina, Langmuir, 2015

MoS2/TNTs composites have been obtained by impregnation of titanate nanotubes (TNTs) with a centrifuged solution of nanosized MoS2 particles in isopropyl alcohol (IPA). The characterization has been performed by combining UV–vis–NIR, Raman, AFM, and HRTEM analyses, before and after impregnation. ...


Mussel-Adhesive-Inspired Fabrication of Multifunctional Silver Nanoparticle Assemblies

06-May-2015 | Shuqiang Xiong; Yan Wang; Jing Zhu; Junrong Yu; Zuming Hu, Langmuir, 2015

The assembly of metal nanoparticles (NPs) has attracted a great deal of attention recently because of their collective properties that could not be exhibited by individual NPs. Here a one-step approach was reported for the fabrication of spherical silver NP assemblies (AgNAs). The formation of ...


Polynuclear Speciation of Trivalent Cations near the Surface of an Electrolyte Solution

05-May-2015 | Mrinal K. Bera; Mark R. Antonio, Langmuir, 2015

Despite long-standing efforts, there is no agreed upon structural model for electrolyte solutions at air–liquid interfaces. We report the simultaneous detection of the near-surface and bulk coordination environments of a trivalent metal cation (europium) in an aqueous solution by use of X-ray ...


One-Step Formation of Bifunctionnal Aryl/Alkyl Grafted Films on Conducting Surfaces by the Reduction of Diazonium Salts in the Presence of Alkyl Iodides

04-May-2015 | Dardan Hetemi; Hassan Hazimeh; Philippe Decorse; Anouk Galtayries; Catherine Combellas; Frédéric Kanoufi; Jean Pinso ..., Langmuir, 2015

The formation of partial perfluoroalkyl or alkyl radicals from partial perfluoroalkyl or alkyl iodides (ICH2CH2C6F13 and IC6H13) and their reaction with surfaces takes place at low driving force (∼−0.5 V/SCE) when the electrochemical reaction is performed in acetonitrile in the presence of ...


Blending and Morphology Control To Turn Hydrophobic SEBS Electrospun Mats Superhydrophilic

04-May-2015 | Rafael S. Kurusu; Nicole R. Demarquette, Langmuir, 2015

Thermoplastic elastomer SEBS, a triblock copolymer composed of styrene (S) and ethylene-co-butylene (EB) blocks, can be dissolved and processed by electrospinning to produce flexible nonwoven mats that can be interesting for applications like filtration or separation membranes. Controlling ...


Reversible Swelling–Shrinking Behavior of Hydrogen-Bonded Free-Standing Thin Film Stabilized by Catechol Reaction

01-May-2015 | Jiaxing Sun; Chao Su; Xuejian Zhang; Wenjing Yin; Jian Xu; Shuguang Yang, Langmuir, 2015

Dopamine-modified poly(acrylic acid) (PAA-dopa) and poly(vinylpyrrolidone) (PVPON) was layer-by-layer (LbL) assembled to prepare thin film based on hydrogen bonding. The carboxylic group of acrylic acid and the phenolic hydroxyl group of dopamine can both act as hydrogen bond donors. The critical ...


Flipped Polyelectrolyte Multilayer Films: Accessing the Buried Interface

30-Apr-2015 | Yara E. Ghoussoub; Joseph B. Schlenoff, Langmuir, 2015

Little is known concerning the interface between a polyelectrolyte multilayer, PEMU, and its substrate. Recent models suggest that excess polymer charge, compensated by counterions, remains buried within the PEMU, especially for thicker films having a nonlinear component to their growth. We ...


Formation of Controllable Hydrophilic/Hydrophobic Drug Delivery Systems by Electrospinning of Vesicles

29-Apr-2015 | Wei Li; Tian Luo; Yanjuan Yang; Xiuniang Tan; Lifei Liu, Langmuir, 2015

Novel multifunctional poly(ethylene oxide) (PEO) nanofibrous membrane, which contains vesicles constructed by mixed surfactant cetyltrimethylammonium bromide (CTAB)/sodium dodecylbenzenesulfonate (SDBS), has been designed as dual drug-delivery system and fabricated via the electrospinning ...


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