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Physics of Fluids : Viscous jet drawing air into a bath

By: Etienne Reyssat, Elise Lorenceau, Frédéric Restagno, and David Quéré

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Chaos : Cracking sheets: Oscillatory fracture paths in thin elasti...

By: Pedro M. Reis, Basile Audoly, and Benoit Roman

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Journal of Applied Physics : High-performance C60 n-channel organi...

By: Xiao-Hong Zhang and Bernard Kippelen

Description: High-performance C60 organic field-effect transistors (OFETs) have been obtained by engineering the essential electrode/semiconductor and dielectric/semiconductor interfaces. By using calcium (Ca) as the source and drain electrodes, the width-normalized contact resistance (RCW) at the electrode/semiconductor interface for devices with channel lengths ranging from 200 down to 25 μm could be reduced to a constant value of 2 kΩ cm at a gate-source voltage (VGS)...

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Physics of Plasmas : Doppler spectroscopy of hydrogen Balmer lines...

By: N. M. Šišovic and N. Konjevic

Description: The results of Doppler spectroscopy of hydrogen Balmer lines from a stainless steel (SS) and copper (Cu) hollow cathode (HC) glow discharge in ammonia and argon-ammonia mixture are reported. The experimental profiles in ammonia discharge are fitted well by superposing three Gaussian profiles. The half widths, in energy units, of narrow and medium Gaussians are in the ranges 0.3–0.4 eV and 3–4 eV, respectively, for both hollow cathodes what is expected on the...

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Physics of Fluids : Symmetry unbreaking in the shapes of perfect p...

By: Marcus Roper, Todd M. Squires, and Michael P. Brenner

Description: We study the shapes of perfect projectiles: Bodies of prescribed volume that are designed to suffer minimum fluid drag in steady flight. Perfect projectiles have a surprising property: Although the flow of fluid around the body of the projectile is fore-aft asymmetric at moderate flow speeds, the shape of the body that minimizes drag is nonetheless highly symmetrical. We show that perfect projectiles are weakly asymmetric and that their asymmetry grows with ...

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Biblioteca Hispanica : Notions of Natural History, to Reach Children

By: Jose Maria Solano and Eulate
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Journal of Applied Physics : Tailoring nucleation and growth condi...

By: Chandan Srivastava, David E. Nikles, and Gregory B. Thompson

Description: To eliminate compositional and size variabilities between individual binary nanoparticles, it is essential to control the mechanistic steps involved in nanoparticle synthesis. A common method for synthesizing FePt nanoparticles involves the simultaneous decomposition and reduction in iron and platinum precursors, respectively. This simultaneous nucleation and growth method yields wide composition and size distributions. This paper describes and experimentall...

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Applied Physics Letters : Terahertz electromagnetic interference s...

By: M. A. Seo, J. H. Yim, Y. H. Ahn, F. Rotermund, D. S. Kim et al

Description: We performed time-domain terahertz spectroscopy on thin layers of single-walled carbon nanotubes (SWCNTs) coated on flexible films. The SWCNT layers demonstrate good shielding of electromagnetic waves in the terahertz range while maintaining good transparency for visible light. The shielding efficiency can be engineered through the thickness control and/or chemical treatment of SWCNT layers. The frequency-dependent dielectric constants of SWCNT layers are in...

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Journal of Applied Physics : CoCrPt-oxide based perpendicular reco...

By: S. N. Piramanayagam, K. Srinivasan, R. Sbiaa, Yan Dong, and R. H. Victora

Description: Writability of magnetic recording media with high anisotropy constant (Ku) is one of the major challenges encountered in extremely high density recording. A possible avenue to improve writability in perpendicular magnetic recording is to reduce the spacing between the writing head and the soft magnetic underlayer (SUL) or head-to-keeper spacing (HKS). A hybrid layer structure for reducing the HKS between the SUL and the writing head is investigated. The prop...

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Biblioteca Hispanica : List of Gentlemen Who Compose the Spanish S...

By: Madrid
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Physics of Fluids : Electrokinetic flows over inhomogeneously slip...

By: Todd M. Squires

Description: Recent measurements and theory suggest that some solid/liquid surfaces can exhibit slip, at times to a surprising degree. Proposed mechanisms for slip include both intrinsic molecular slip as well as “effective” slip over complex and multiphase interfaces (i.e., covered with “lubricating” nanobubbles or trapped gas pockets). Electrokinetic flow velocities can be significantly enhanced over slipping surfaces as the high shear rates within the double layer dri...

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The Journal of Chemical Physics : Kinetic hindrance during the sur...

By: K. Lahtonen, M. Lampimäki, M. Hirsimäki, and M. Valden

Description: The influence of c(10×2)-Ag superstructure on the oxidation kinetics and oxygen adsorption-induced nanostructures on Cu(100) has been investigated as a function of O2 exposure at 373 K by employing scanning tunneling microscopy and x-ray photoelectron spectroscopy. The oxygen adsorption-induced segregation of Cu through the Ag overlayer is found to trigger agglomeration of Ag and subsequent formation of ordered oval-shaped nanosize metallic Ag islands separa...

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Physics of Plasmas : Characterization of converging shock waves ge...

By: S. Efimov, A. Fedotov, S. Gleizer, V. Tz. Gurovich, G. Bazalitski et al

Description: Results of ∼ 200 kbar pressure generation at 50 μm distance from the implosion axis of the converging shock wave produced by an underwater electrical explosion of a cylindrical wire array are reported. The array was exploded using a submicrosecond high-current generator (stored energy of ∼ 4.2 kJ, current amplitude of ∼ 325 kA, rise time of ∼ 1 μs). Multiframe shadow imaging of the shock wave was used to determine its time of flight. These data were applied ...

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Journal of Applied Physics : Alternative to classic annealing trea...

By: O. Van Overschelde, G. Guisbiers, F. Hamadi, A. Hemberg, R. Snyders et al

Description: Titanium dioxide thin films have been deposited by reactive magnetron sputtering on glass and subsequently irradiated by UV radiation using a KrF excimer laser. The influence of the laser fluence (F) on the constitution and microstructure of the deposited films is studied for 0.05

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Biblioteca Hispanica : Programme an Elementary Course of Natural H...

By: Manuel Cazurro Ruiz
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Journal of Applied Physics : Structure and photoinduced volume cha...

By: R. Lukács, J. Hegedüs, and S. Kugler

Description: Atomic scale computer simulations on structures and photoinduced volume changes of flatly and obliquely deposited amorphous selenium (a-Se) films have been carried out in order to understand how the properties of chalcogenide glasses are influenced by their preparation method. Obliquely deposited a-Se thin films contain more coordination defects and larger voids than the flatly deposited ones. To model the photoinduced volume changes the electron excitation ...

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Journal of Applied Physics : Thermal phonon resonance observed wit...

By: Yasuo Minami and Keiji Sakai

Description: We observed resonating thermal phonons in a cavity. The combination of our millisecond Brillouin scattering technique and this phonon resonance observation enables the determination of phonon velocity with an accuracy of 10−4 within an observation time of 30 ms. In the experiment, phonon propagation in a confined space filled with liquid toluene was observed. The observed phonon resonance spectra agree with theoretical predictions.

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Chaos : Synchronization-based scalability of complex clustered net...

By: Xiaojuan Ma, Liang Huang, Ying-Cheng Lai, Yan Wang, and Zhigang Zheng

Description: Complex clustered networks arise in biological, social, physical, and technological systems, and the synchronous dynamics on such networks have attracted recent interests. Here we investigate system-size dependence of the synchronizability of these networks. Theoretical analysis and numerical computations reveal that, for a typical clustered network, as its size is increased, the synchronizability can be maintained or even enhanced but at the expense of dete...

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Biblioteca Hispanica : Natural Science, Applied to Commerce, Indus...

By: Sunday Miguel
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Journal of Applied Physics : The temperature dependence of the ref...

By: Naoki Watanabe, Tsunenobu Kimoto, and Jun Suda

Description: The temperature dependence of the refractive indices of GaN and AlN was investigated in the wavelength range from the near band edge (367 nm for GaN and 217 nm for AlN) to 1000 nm and the temperature range from room temperature to 515 °C. Optical interference measurements with vertical incident configuration were employed to precisely evaluate the ordinary refractive indices.

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