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Nanotextured Pillars of Electrosprayed Bismuth Vanadate for Efficient Photoelectrochemical Water Splitting

17.03.2015 | Hyun Yoon; Mukund G. Mali; Jae Young Choi; Min-woo Kim; Sung Kyu Choi; Hyunwoong Park; Salem S. Al-Deyab; Mark T. Sw ..., Langmuir, 2015

We demonstrate, for the first time, electrostatically sprayed bismuth vanadate (BiVO4) thin films for photoelectrochemical water splitting. Characterization of these films by X-ray diffraction, Raman scattering, and high-resolution scanning electron microscopy analyses revealed the formation of ...

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Highly Fluorescent, Near-Infrared-Emitting Cd2+-Tuned HgS Nanocrystals with Optical Applications

11.03.2015 | Jing Yang; Yaoping Hu; Jun Luo; Yu-Hua Zhu; Jun-Sheng Yu, Langmuir, 2015

Bulk HgS itself has proven to be a technologically important material; however, the poor stability and weak emission of HgS nanocrystals have greatly hindered their promising applications. Presently, a critical problem is the uncontrollable growth of HgS NCs and their intrinsic surface states ...

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Thermally Induced Conformational Transitions in Nascent Branched Amphiphilic Peptide Capsules

06.03.2015 | Pinakin Sukthankar; Susan K. Whitaker; Macy Garcia; Alvaro Herrera; Mark Boatwright; Om Prakash; John M. Tomich, Langmuir, 2015

Branched amphiphilic peptide capsules (BAPCs) are biocompatible, bilayer delimited polycationic nanospheres that spontaneously form at room temperature through the coassembly of two amphiphilic branched peptides: bis(FLIVI)-K-K4 and bis(FLIVIGSII)-K-K4. BAPCs are readily taken up by cells in ...

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Dynamic Light Scattering Study and DLVO Analysis of Physicochemical Interactions in Colloidal Suspensions of Charged Disks

05.03.2015 | Debasish Saha; Ranjini Bandyopadhyay; Yogesh M. Joshi, Langmuir, 2015

The interparticle interactions in colloidal suspensions of charged disks of Laponite clay in water were investigated using dynamic light scattering (DLS) and Derjaguin–Landau–Verwey–Overbeek (DLVO) theory. We studied the effects of clay concentration (CL), the concentration of externally added ...

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Buffer-Induced Swelling and Vesicle Budding in Binary Lipid Mixtures of Dioleoylphosphatidylcholine:Dioleoylphosphatidylethanolamine and Dioleoylphosphatidylcholine:Lysophosphatidylcholine Using Small-Angle X-ray Scattering and 31P Static NMR

04.03.2015 | Hanna M. G. Barriga; Richard Bazin; Richard H. Templer; Robert. V. Law; Oscar Ces, Langmuir, 2015

A large variety of data exists on lipid phase behavior; however, it is mostly in nonbuffered systems over nonbiological temperature ranges. We present biophysical data on lipid mixtures of dioleoylphosphatidylcholine (DOPC), dioleoylphosphatidylethanolamine (DOPE), and lysophosphatidylcholine ...

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Tethered Poly(2-isopropyl-2-oxazoline) Chains: Temperature Effects on Layer Structure and Interactions Probed by AFM Experiments and Modeling

02.03.2015 | Junxue An; Xiaoyan Liu; Per Linse; Andra Dėdinaitė; Françoise M. Winnik; Per M. Claesson, Langmuir, 2015

Thermoresponsive polymer layers on silica surfaces have been obtained by utilizing electrostatically driven adsorption of a cationic–nonionic diblock copolymer. The cationic block provides strong anchoring to the surface for the nonionic block of poly(2-isopropyl-2-oxazoline), referred to as ...

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Temperature-Dependent Infrared and Calorimetric Studies on Arsenicals Adsorption from Solution to Hematite Nanoparticles

27.02.2015 | Md Abdus Sabur; Sabine Goldberg; Adrian Gale; Nadine Kabengi; Hind A. Al-Abadleh, Langmuir, 2015

To address the lack of systematic and surface sensitive studies on the adsorption energetics of arsenic compounds on metal (oxyhydr)oxides, we conducted temperature-dependent ATR-FTIR studies for the adsorption of arsenate, monomethylarsonic acid, and dimethylarsinic acid on hematite ...

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Preparation of Compact Nanoparticle Clusters from Polyethylene Glycol-Coated Gold Nanoparticles by Fine-Tuning Colloidal Interactions

26.02.2015 | Dániel Zámbó; György Z. Radnóczi; András Deák, Langmuir, 2015

Low-molecular weight polyethylene glycol (PEG) has a lower critical solution temperature well outside the boiling point of water at ambient pressure, but it can be reduced at high ionic strengths. We extend this concept to trigger the clustering of gold nanoparticles through the control of ...

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Generation of Motion of Drops with Interfacial Contact

26.02.2015 | Manoj K. Chaudhury; Aditi Chakrabarti; Susan Daniel, Langmuir, 2015

A liquid drop moves on a solid surface if it is subjected to a gradient of wettability or temperature. However, the pinning defects on the surface manifested in terms of a wetting hysteresis, or first-order nonlinear friction, limit the motion in the sense that a critical size has to be exceeded ...

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Temperature-Dependent In-Plane Structure Formation of an X-Shaped Bolapolyphile within Lipid Bilayers

26.02.2015 | Bob-Dan Lechner; Helgard Ebert; Marko Prehm; Stefan Werner; Annette Meister; Gerd Hause; André Beerlink; Kay Saalwäc ..., Langmuir, 2015

Polyphilic compound B12 is an X-shaped molecule with a stiff aromatic core, flexible aliphatic side chains, and hydrophilic end groups. Forming a thermotropic triangular honeycomb phase in the bulk between 177 and 182 °C but no lyotropic phases, it is designed to fit into DPPC or DMPC lipid ...

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