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855 Aktuelle Fachpublikationen zum Thema temperature

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Ultraviolet Pretreatment of Titanium Dioxide and Tin-Doped Indium Oxide Surfaces as a Promoter of the Adsorption of Organic Molecules in Dry Deposition Processes: Light Patterning of Organic Nanowires

23.07.2015 | Youssef Oulad-Zian; Juan R. Sanchez-Valencia; Julian Parra-Barranco; Said Hamad; Juan P. Espinos; Angel Barranco; Ja ..., Langmuir, 2015

In this article we present the preactivation of TiO2 and ITO by UV irradiation under ambient conditions as a tool to enhance the incorporation of organic molecules on these oxides by evaporation at low pressures. The deposition of π-stacked molecules on TiO2 and ITO at controlled substrate ...

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Surface Activity and Aggregation Behavior of Siloxane-Based Ionic Liquids in Aqueous Solution

23.07.2015 | Guoyong Wang; Ping Li; Zhiping Du; Wanxu Wang; Guojin Li, Langmuir, 2015

Six novel siloxane-based surface-active ionic liquids (SAILs)—siloxane ammonium carboxylate [Si(n)N(2)-CA(1), (n = 3, 4)]—were designed and synthesized. Their melting points, surface activities, and self-aggregation behavior in aqueous solution were studied. The results showed that because of the ...

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A New Insight into Growth Mechanism and Kinetics of Mesoporous Silica Nanoparticles by in Situ Small Angle X-ray Scattering

22.07.2015 | Zhifeng Yi; Ludovic F. Dumée; Christopher J. Garvey; Chunfang Feng; Fenghua She; James E. Rookes; Stephen Mudie; Dav ..., Langmuir, 2015

The growth mechanism and kinetics of mesoporous silica nanoparticles (MSNs) were investigated for the first time by using a synchrotron time-resolved small-angle X-ray scattering (SAXS) analysis. The synchrotron SAXS offers unsurpassed time resolution and the ability to detect structural changes ...

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Hierarchical, Ultrathin Single-Crystal Nanowires of CdS Conveniently Produced in Laser-Induced Thermal Field

16.07.2015 | Li-Li Han; Huolin L. Xin; Sergei A. Kulinich; Li-Jun Yang; Xi-Wen Du, Langmuir, 2015

Hierarchical nanowires (HNWs) exhibit unique properties and have wide applications, while often suffering from imperfect structure. Herein, we report a facile strategy toward ultrathin CdS HNWs with monocrystal structure, where a continuous-wave (CW) Nd:YAG laser is employed to irradiate an oleic ...

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Inverse Temperature Dependence in Static Quenching versus Calorimetric Exploration: Binding Interaction of Chloramphenicol to β-Lactoglobulin

16.07.2015 | Narayani Ghosh; Ramakanta Mondal; Saptarshi Mukherjee, Langmuir, 2015

The binding interaction between the whey protein bovine β-lactoglobulin (βLG) with the well-known antibiotic chloramphenicol (Clp) is explored by monitoring the intrinsic fluorescence of βLG. Steady-state and time-resolved fluorescence spectral data reveal that quenching of βLG fluorescence ...

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Thermal and Chemical Stability of Thiol Bonding on Gold Nanostars

16.07.2015 | Mykola Borzenkov; Giuseppe Chirico; Laura D’Alfonso; Laura Sironi; Maddalena Collini; Elisa Cabrini; Giacomo Dacarro ..., Langmuir, 2015

The stability of thiol bonding on the surface of star-shaped gold nanoparticles was studied as a function of temperature in water and in a set of biologically relevant conditions. The stability was evaluated by monitoring the release of a model fluorescent dye, Bodipy-thiol (BDP-SH), from gold ...

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Molecular Orientation and Structural Transformations in Phthalic Anhydride Thin Films on MgO(100)/Ag(100)

09.07.2015 | Susanne Mohr; Tao Xu; Tibor Döpper; Mathias Laurin; Andreas Görling; Jörg Libuda, Langmuir, 2015

Structural control of organic thin films on dielectric substrates is the key to tailoring the physical properties of hybrid materials, for example, for application in solar energy conversion, molecular electronics, or catalysis. In this work, we investigate the molecular orientation of phthalic ...

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Effect of Fluorocarbon and Hydrocarbon Chain Lengths in Hybrid Surfactants for Supercritical CO2

30.06.2015 | Masanobu Sagisaka; Shinji Ono; Craig James; Atsushi Yoshizawa; Azmi Mohamed; Frédéric Guittard; Sarah E. Rogers; Ric ..., Langmuir, 2015

Hybrid surfactants containing both fluorocarbon (FC) and hydrocarbon (HC) chains have recently been shown to solubilize water and form elongated reversed micelles in supercritical CO2. To clarify the most effective FC and HC chain lengths, the aggregation behavior and interfacial properties of ...

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In Situ Conductance Analysis of Zinc Oxide Nucleation and Coalescence during Atomic Layer Deposition on Metal Oxides and Polymers

22.06.2015 | William J. Sweet, III; Gregory N. Parsons, Langmuir, 2015

Real time in situ conductance is collected continuously during atomic layer deposition (ALD) of zinc oxide films, and trends are used to study ALD nucleation on polypropylene, nylon-6, SiO2, TiO2, and Al2O3 substrates. The detailed conductance change during the ALD cycle is ascribed to changes in ...

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Synthesis of NIR-Responsive NaYF4:Yb,Er Upconversion Fluorescent Nanoparticles Using an Optimized Solvothermal Method and Their Applications in Enhanced Development of Latent Fingerprints on Various Smooth Substrates

19.06.2015 | Meng Wang; Ye Zhu; Chuanbin Mao, Langmuir, 2015

Fingerprints at crime scenes are usually latent. The powder-dusting method is the most commonly used procedure for developing latent fingerprints in forensic science. However, the traditional powder-dusting method has characteristics of low sensitivity, low contrast, high background noise, and ...

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