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931 Aktuelle Fachpublikationen zum Thema temperature

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Activation Energy of the Low-pH-Induced Lamellar to Bicontinuous Cubic Phase Transition in Dioleoylphosphatidylserine/Monoolein

27.01.2016 | Toshihiko Oka; Takahiro Saiki; Jahangir Md. Alam; Masahito Yamazaki, Langmuir, 2016

Electrostatic interaction is an important factor for phase transitions between lamellar liquid-crystalline (Lα) and inverse bicontinuous cubic (QII) phases. We investigated the effect of temperature on the low-pH-induced Lα to double-diamond cubic (QIID) phase transition in ...

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Mechanically Enhanced Liquid Interfaces at Human Body Temperature Using Thermosensitive Methylated Nanocrystalline Cellulose

27.01.2016 | N. Scheuble; T. Geue; S. Kuster; J. Adamcik; R. Mezzenga; E. J. Windhab; P. Fischer, Langmuir, 2016

The mechanical performance of materials at oil/water interfaces after consumption is a key factor affecting hydrophobic drug release. In this study, we methylated the surface of nanocrystalline cellulose (NCC) by mercerization and dimethyl sulfate exposure to produce thermosensitive biopolymers. ...

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Formation of Small Gold Nanoparticle Chains with High NIR Extinction through Bridging with Calcium Ions

25.01.2016 | Robert J. Stover; Ehsan Moaseri; Sai P. Gourisankar; Muhammad Iqbal; Negin K. Rahbar; Behzad Changalvaie; Thomas M. ..., Langmuir, 2016

The self-assembly of citrate-capped Au nanoparticles (5 nm) resulted in branched nanochains by adding CaCl2 versus spherical nanoclusters for NaCl. These assemblies were formed between 1 s to 30 min by tuning the electrostatic repulsion and the interparticle bridging attraction between the ...

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Temperature-Induced Aggregate Transitions in Mixtures of Cationic Ammonium Gemini Surfactant with Anionic Glutamic Acid Surfactant in Aqueous Solution

21.01.2016 | Xiuling Ji; Maozhang Tian; Yilin Wang, Langmuir, 2016

The aggregation behaviors of the mixtures of cationic gemini surfactant 1,4-bis(dodecyl-N,N-dimethylammonium bromide)-2,3-butanediol (C12C4(OH)2C12Br2) and anionic amino acid surfactant N-dodecanoylglutamic acid (C12Glu) in aqueous solution of pH = 10.0 have been studied. The mixture forms ...

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Triphenylene-Based Room-Temperature Discotic Liquid Crystals: A New Class of Blue-Light-Emitting Materials with Long-Range Columnar Self-Assembly

20.01.2016 | Monika Gupta; Santanu Kumar Pal, Langmuir, 2016

A straightforward synthesis of multialkynylbenzene-bridged triphenylene-based dyad systems (via flexible alkyl spacers) that self-organize into room-temperature columnar structures over a long range is reported. The compounds with spacer lengths (n) of 8 and 10 exhibit a columnar rectangular ...

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Cassie-State Stability of Metallic Superhydrophobic Surfaces with Various Micro/Nanostructures Produced by a Femtosecond Laser

20.01.2016 | Jiangyou Long; Lin Pan; Peixun Fan; Dingwei Gong; Dafa Jiang; Hongjun Zhang; Lin Li; Minlin Zhong, Langmuir, 2016

The Cassie-state stability plays a vital role in the applications of metallic superhydrophobic surfaces. Although a large number of papers have reported the superhydrophobic performance of various surface micro/nanostructures, the knowledge of which kind of micro/nanostructure contributes ...

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Load Rate and Temperature Dependent Mechanical Properties of the Cortical Neuron and Its Pericellular Layer Measured by Atomic Force Microscopy

19.01.2016 | Marc Simon; Maxim Dokukin; Vivekanand Kalaparthi; Elise Spedden; Igor Sokolov; Cristian Staii, Langmuir, 2016

When studying the mechanical properties of cells by an indentation technique, it is important to take into account the nontrivial pericellular interface (or pericellular “brush”) which includes a pericellular coating and corrugation of the pericellular membrane (microvilli and microridges). Here ...

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Niosomes as Drug Nanovectors: Multiscale pH-Dependent Structural Response

19.01.2016 | Carlotta Marianecci; Luisa Di Marzio; Elena Del Favero; Laura Cantù; Paola Brocca; Valeria Rondelli; Federica Rinald ..., Langmuir, 2016

The use of nanocarriers, which respond to different stimuli controlling their physicochemical properties and biological responsivness, shows a growing interest in pharmaceutical science. The stimuli are activated by targeting tissues and biological compartments, e.g., pH modification, ...

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Reversible Chromatic Response of Polydiacetylene Derivative Vesicles in D2O Solvent

14.01.2016 | Min Jae Shin; Jong-Duk Kim, Langmuir, 2016

The thermal chromatic sensitivity of polydiacetylenes (PDAs) with 10,12-pentacosadiynoic acid (PCDA) derivatives, which have a hydroxyl group (HEEPCDA) and an amine group (APPCDA), were investigated using D2O and H2O as solvents. The vesicle solution with polymerized HEEPCDA exhibited a ...

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pH-Induced Re-entrant Microstructural Transitions in Cationic Surfactant–Hydrotrope Mixtures

11.01.2016 | Chinedu D. Umeasiegbu; Vemuri Balakotaiah; Ramanan Krishnamoorti, Langmuir, 2016

The structural transitions occurring with change in pH for aqueous mixtures of a cationic surfactant (cetyltrimethylammonium bromide, CTAB) and a hydrotrope (sodium salicylate, NaSal) were investigated at various temperatures using dynamic light scattering and small-angle neutron scattering. ...

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