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2.088 Aktuelle Fachpublikationen zum Thema temperature

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Phase diagrams of nanoalloys: influence of size and morphology

27.05.2015 | F. Berthier; E. Maras; B. Legrand, Physical Chemistry Chemical Physics, 2015

The size dependence of the phase diagram of nanoalloys with a tendency to phase separate is investigated. As the critical temperature may depend on both the size and the morphology of the nanoparticles, we consider nanowires with different cross-sections and also nanotubes with different ...

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Ceria Doped Mixed Metal Oxide Nanoparticles as Oxidation Catalysts: Synthesis and their Characterization

24.05.2015 | Author(s): S.S.P. Sultana , D.H.V. Kishore , Mufsir Kuniyil , Mujeeb Khan , Abdulrahman Alwarthan , K.R.S. Pra ..., Arabian Journal of Chemistry, 2015

Publication date: Available online 18 May 2015 Source:Arabian Journal of Chemistry Author(s): S.S.P. Sultana , D.H.V. Kishore , Mufsir Kuniyil , Mujeeb Khan , Abdulrahman Alwarthan , K.R.S. Prasad , Joselito P. Labis , S.F. Adil Mixed metal nanoparticles (NPs) have attracted ...

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Enhanced Energy Storage of Dielectric Nanocomposites at Elevated Temperatures

23.05.2015 | Mohammad Rajib, Ricardo Martinez, Mohammad Shuvo, Hasanul Karim, Diego Delfin, Samia Afrin, Gerardo Rodriguez, Raman ..., International Journal of Applied Ceramic Technology, 2015

Enhancing the performance of dielectric capacitors toward higher energy density and higher operating temperatures has been drawing increased interest. Therefore, in this investigation, research efforts were dedicated to the fabrication and characterization of nanocomposites in order to enhance ...

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Solitary surfactant assisted morphology dependent chemiresistive polyanilne sensors for room temperature monitoring of low ppm sulphur dioxide

22.05.2015 | Vishal Chaudhary, Amarjeet Kaur, Polymer International, 2015

Abstract We report novel application of cetryltrimethylammonium bromide (CTAB) assisted polyaniline (PAN) nanostructures to fabricate cost effective chemiresistive sensor for monitoring of low ppm level of sulphur dioxide (SO2) at room temperature. PAN nanoparticles (NPs, diameter ~200 nm), ...

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Systematic Study of Exchange Coupling in Core–Shell Fe3−δO4@CoO Nanoparticles

22.05.2015 | Xiaojie Liu; Benoit P. Pichon; Corinne Ulhaq; Christophe Lefèvre; Jean-Marc Grenèche; Dominique Bégin; Sylvie Bégin- ..., Chemistry of Materials, 2015

Although single magnetic domain nanoparticles are very promising for many applications, size reduction usually results in low magnetic anisotropy and unblocked domain at room temperature, e.g., superparamagnetism. An alternative approach is core–shell nanoparticles featured by exchange bias ...

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Millisecond‐Timescale Monitoring of PbS Nanoparticle Nucleation and Growth Using Droplet‐Based Microfluidics

21.05.2015 | Ioannis Lignos, Stavros Stavrakis, Ardita Kilaj, Andrew J. deMello, Small, 2015

The early‐time kinetics ( A droplet‐based microfluidic system with integrated absorbance and fluorescence detection is used for the online screening of nucleation and growth of lead sulfide (PbS) nanoparticles at a millisecond time scale. The novel approach reveals the fundamental ...

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POLY(N‐VINYLPYRROLIDONE) PROTECTED GOLD AND SILVER NANOPARTICLES: SYNTHESIS, CHARACTERIZATION AND CATALYTIC PROPERTIES

21.05.2015 | Zhanar Ibrayeva, Elmira Baigaziyeva, Nurlykyz Yesmurzayeva, Gulnur Tatykhanova, Marziya Yashkarova, Sarkyt Kudaibergenov, Macromolecular Symposia, 2015

Summary Gold (AuNPs) and silver (AgNPs) nanoparticles protected by poly(N‐vinylpyrrolidone) (PVP) and β‐Cyclodextrine (β‐CD) were prepared by Turkevich method and “one‐pot” synthetic protocol. Absorption spectra, size, morphology, structure and thermal properties of AuNPs and AgNPs were ...

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Effect of electrical properties on gas sensitivity of polypyrrole/cds nanocomposites

14.05.2015 | Bharati Yeole, Tanushree Sen, D. P. Hansora, Satyendra Mishra, Journal of Applied Polymer Science, 2015

ABSTRACT In the present work, polypyrrole (PPy) nanocomposites were synthesized using ferric chloride (FeCl3) as an oxidant by in situ polymerization at room temperature. Cadmium sulfide (CdS) nanoparticles were synthesized by ultrasonication technique with size ranging between 60 and 110 nm. ...

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Analysis of the dielectric relaxation and ac conductivity behavior of polyvinyl alcohol‐cadmium selenide nanocomposite films

13.05.2015 | Subhojyoti Sinha, Sanat Kumar Chatterjee, Jiten Ghosh, Ajit Kumar Meikap, Polymer Composites, 2015

We adopt an analytical approach to study the dielectric relaxation and ac conductivity behavior of the polyvinyl alcohol (PVA) ‐ Cadmium Selenide (CdSe) nanocomposite films in the frequency range 100 Hz ≤ f ≤ 1 MHz and in the temperature range 298 K ≤ T ≤ 420 K. The CdSe nanoparticles are ...

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Remarkable catalytic activity of ultra small free-CeO2 nanoparticles in selective carbon-carbon bond formation reactions in water at room temperature

13.05.2015 | Subhash Banerjee, New Journal of Chemistry, 2015

A simple and efficient protocol for selective bis-Michael addition and mono allylation of active methylene compounds has been demonstrated using capping agent free ultra-small sized (~ 5 nm) cerium oxide nanoparticles (free-CeO2 NPs) as reusable catalyst in water at room temperature. Significant ...

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