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Aqueous Solution-Based Fe3O4 Seed-Mediated Route to Hydrophilic Fe3O4–Au Janus Nanoparticles

29-Apr-2016 | Chenjing Jin; Yun Qu; Minggui Wang; Jie Han; Yimin Hu; Rong Guo, Langmuir, 2016

Hydrophilic Fe3O4–Au Janus nanoparticles have been synthesized through a facile aqueous solution-based Fe3O4 seed-mediated chemical reduction route, where Au nanoparticles can be in situ formed on surfaces of PVP-modified Fe3O4 nanoparticles by adopting the well-known citrate reduction route. The ...


Electrografting of 3-Aminopropyltriethoxysilane on a Glassy Carbon Electrode for the Improved Adhesion of Vertically Oriented Mesoporous Silica Thin Films

21-Apr-2016 | Tauqir Nasir; Lin Zhang; Neus Vilà; Grégoire Herzog; Alain Walcarius, Langmuir, 2016

Vertically oriented mesoporous silica has proven to be of interest for applications in a variety of fields (e.g., electroanalysis, energy, and nanotechnology). Although glassy carbon is widely used as an electrode material, the adherence of silica deposits is rather poor, causing mechanical ...


Synthesis and Characterization of Aminopropyltriethoxysilane-Polydopamine Coatings

19-Apr-2016 | Daniel B. Knorr, Jr.; Ngon T. Tran; Karen J. Gaskell; Joshua A. Orlicki; Joseph C. Woicik; Cherno Jaye; Daniel A. Fi ..., Langmuir, 2016

Polydopamine coatings are of interest due to the fact that they can promote adhesion to a broad range of materials and can enable a variety of applications. However, the polydopamine–substrate interaction is often noncovalent. To broaden the potential applications of polydopamine, we show the ...


Inverse Leidenfrost Effect: Levitating Drops on Liquid Nitrogen

18-Apr-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 ...


STAND: Surface Tension for Aggregation Number Determination

15-Apr-2016 | Pablo F. Garrido; Pilar Brocos; Alfredo Amigo; Luis García-Río; Jesús Gracia-Fadrique; Ángel Piñeiro, Langmuir, 2016

Taking advantage of the extremely high dependence of surface tension on the concentration of amphiphilic molecules in aqueous solution, a new model based on the double equilibrium between free and aggregated molecules in the liquid phase and between free molecules in the liquid phase and those ...


Preparation of Thin Melanin-Type Films by Surface-Controlled Oxidation

15-Apr-2016 | Mikko Salomäki; Matti Tupala; Timo Parviainen; Jarkko Leiro; Maarit Karonen; Jukka Lukkari, Langmuir, 2016

The preparation of thin melanin films suitable for applications is challenging. In this work, we present a new alternative approach to thin melanin-type films using oxidative multilayers prepared by the sequential layer-by-layer deposition of cerium(IV) and inorganic polyphosphate. The ...


pH Dependence of Adsorbed Fibrinogen Conformation and Its Effect on Platelet Adhesion

13-Apr-2016 | Yu Hu; Jing Jin; Haojun Liang; Xiangling Ji; Jinghua Yin; Wei Jiang, Langmuir, 2016

Quartz crystal microbalance with dissipation (QCM-D) and dual polarization interferometry (DPI) were used to investigate fibrinogen (Fib) adsorption behavior on different surfaces by changing the pH value. Moreover, integrin adhesion to the adsorbed Fibs was studied using DPI. Qualitative and ...


Photocatalytic Deposition of Hydroxyapatite onto a Titanium Dioxide Nanotubular Layer with Fine Tuning of Layer Nanoarchitecture

13-Apr-2016 | Sviatlana A. Ulasevich; Sergey K. Poznyak; Anatoly I. Kulak; Aleksey D. Lisenkov; Maksim Starykevich; Ekaterina V. Skorb, Langmuir, 2016

A new effective method of photocatalytic deposition of hydroxyapatite (HA) onto semiconductor substrates is proposed. A highly ordered nanotubular TiO2 (TNT) layer formed on titanium via its anodization is chosen as the photoactive substrate. The method is based on photodecomposition of the ...


Quantitative Subtractively Normalized Interfacial Fourier Transform Infrared Reflection Spectroscopy Study of the Adsorption of Adenine on Au(111) Electrodes

13-Apr-2016 | Francisco Prieto; Zhangfei Su; J. Jay Leitch; Manuela Rueda; Jacek Lipkowski, Langmuir, 2016

Quantitative subtractively normalized interfacial Fourier transform infrared reflection spectroscopy (SNIFTIRS) was used to determine the molecular orientation and identify the metal–molecular interactions responsible for the adsorption of adenine from the bulk electrolyte solution onto the ...


Self-oscillating Gel Accelerated while Sensing the Shape of an Aqueous Surface

12-Apr-2016 | Miyu Yoshii; Hiroya Yamamoto; Yutaka Sumino; Satoshi Nakata, Langmuir, 2016

The reciprocating motion of a self-oscillating square gel induced by the Belousov–Zhabotinsky (BZ) reaction was investigated on an aqueous surface. The chemical wave propagated from the side at which the oxidation of the Ru catalyst in the gel started. As the chemical wave propagated, the gel ...


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