Thin Films Research Papers - Academia.edu (original) (raw)

Top Papers
Most Cited Papers
Most Downloaded Papers
Newest Papers
People
- by
- •
- Nonlinear Optics, Optical Waveguides, Thin Films, Mathematical Sciences

Thin films of nanocrystalline cubic AlN were synthesized by vapor–liquid–solid (VLS) route on Si and fused silica substrates at appropriate conditions. The formation of cubic AlN was confirmed by X-ray diffraction studies. We also observed that AuCl3 plays an important role as a catalyst in the synthesis of well crystalline cubic phase of AlN. Energy dispersive analysis of X-rays confirmed

- by Rajiv Thapa
- •
- Materials Engineering, Condensed Matter Physics, Catalysts, Field emission
- by S. Visnovsky
- •
- Magnetic thin film, Thin Films, Physical sciences, Optical physics
- by James Liburdy
- •
- Mass Transfer, Energy Consumption, Stability, Heat and Mass Transfer
- by Renato Bozio
- •
- Laser Spectroscopy, Nonlinear Optics, Thin Films, Physical sciences
- by J. Kools
- •
- Mechanical Engineering, Condensed Matter Physics, Thin Films, Sputtering
- by Maria Mitkova
- •
- Materials Engineering, Condensed Matter Physics, Raman Spectroscopy, Thin Films
- by Arturo Ayon
- •
- Materials Engineering, Condensed Matter Physics, Nanotechnology, Thin Films

The present paper deals with an experimental convective heat transfer investigation around a film-cooled, high-pressure gas turbine rotor blade mounted in a stationary, linear cascade arrangement. The measurements were performed in the von Karman Institute Isentropic Light Piston Compression Tube facility. The test blade was made of Macor glass ceramic and was instrumented with thin film gages. The coolant flow was ejected simultaneously through the leading edge (three rows of holes), the suction side (two rows of holes), and the pressure side (one row of holes). The effects of overall mass weight ratio, coolant to free-stream temperature ratio, and free-stream turbulence were successively investigated.

- by Cengiz Camci
- •
- Mechanical Engineering, Aerospace Engineering, Convection, Turbulence
- by Jan Schmidt
- •
- Mechanical Engineering, Near Infrared, Optical Design, Thin Films
- by Kresimir Furic
- •
- Raman Spectroscopy, Silicon, Pyrolysis, Thin Films
- by Neha Singh
- •
- Scanning Electron Microscopy, Thin Films, Zinc Oxide, Thin Film
- by Carl Lampert and +1
- •
- Engineering, Technology, Microstructure, Electrochemistry
- by Hulya Demiryont
- •
- Mechanical Engineering, Thin Films, Thin Film, Optical Properties
- by Elizabeth Lund
- •
- Engineering, Modeling, Thin Films, Interfaces
- by Michel Fromm
- •
- Engineering, Materials Engineering, Mechanical Engineering, Technology

Hydrophobic inorganic films were obtained by direct deposition of copper or silicon onto natural lotus leaves by ion beam sputtering deposition technique. Scanning electron microscopy observations showed a lotus-leaf-like surface structure of the deposited inorganic films. Hydrophobic nature of the inorganic films on lotus leaves had been improved compared to the inorganic films deposited on flat silicon substrates. Water contact angles measured on the lotus-leaf-like copper and silicon films were 136.3 ± 8° and 117.8 ± 4.4°, respectively. The hydrophobic lotus-leaf-like inorganic films had been repeated used as nanoimprint stamps. Negative structures of lotus-leaf-like inorganic films were obtained on the polystyrene resist layers.

- by PDMS PMMA
- •
- Thin Films and Coatings, Nanotechnology, Thin Films, Mechanical properties
- by Sam Bader
- •
- Symbiosis, Electron Diffraction, Magnetic thin film, Electron Spectroscopy

Improving the functional stability of shape memory alloys (SMAs), which undergo a reversible martensitic transformation, is critical for their applications and remains a central research theme driving advances in shape memory technology. By using a thin-film composition-spread technique and high-throughput characterization methods, the lattice parameters of quaternary Ti–Ni–Cu–Pd SMAs and the thermal hysteresis are tailored. Novel alloys with near-zero thermal hysteresis, as predicted by the geometric non-linear theory of martensite, are identified. The thin-film results are successfully transferred to bulk materials and near-zero thermal hysteresis is observed for the phase transformation in bulk alloys using the temperature-dependent alternating current potential drop method. A universal behavior of hysteresis versus the middle eigenvalue of the transformation stretch matrix is observed for different alloy systems. Furthermore, significantly improved functional stability, investigated by thermal cycling using differential scanning calorimetry, is found for the quaternary bulk alloy Ti50.2Ni34.4Cu12.3Pd3.1.

- by Mustafa Rahim
- •
- Engineering, Thin Films, Actuators, Advanced Functional Materials
- by Xinjun Liu
- •
- Materials Engineering, Condensed Matter Physics, Nanotechnology, Thin Films

In ferromagnetic thin films, the effect of the magnetic anisotropy dispersion on the quasi-static susceptibility measured under a static magnetic field is shown. An approach is presented to estimate the anisotropy distribution both in angle and intensity from static and dynamical magnetic measurements. Because the transverse biased susceptibility is not fully described by the single anisotropy model, in particular for H ?? HK, either a full magnetic anisotropy dispersion P(??,HK) without exchange energy or a double anisotropy modeling coupled by the exchange energy are introduced to access the observed behavior. These two extreme magnetic configurations are discussed.

- by pascal thibaudeau
- •
- Thin Films, Magnetism and Magnetic Materials
- by John Sanchez
- •
- Thin Films
- by Hossein Sojoudi
- •
- Renewable Energy, Thin Films and Coatings, Energy, Energy and Environment
- by Paulo Ribeiro
- •
- Engineering, Technology, Polyelectrolytes, Kinetics
- by Krzysztof Rozniatowski
- •
- Engineering, Technology, Nanoindentation, PHOTOELECTRON SPECTROSCOPY
- by R. Wolters
- •
- Engineering, Atomic Layer Deposition, Thin Films, Mott metal-insulator transition

Laboratoire de Physique des Interfaces et des Couche Minces (LPICM), Ecole Polytechnique, Palaiseau 91128, France 1Liquid Crystal Display Research and Design Center (SEC LCD), Samsung Electronics, San #24, Nongseo-ri, Giehung-eup, Yongin,... more

- by Chiwoo Kim
- •
- Japanese, Thin Films, Mathematical Sciences, Physical sciences
- by Kashan Shaikh
- •
- Scanning Probe Microscopy, Elastomers, Microelectromechanical systems, Thin Films
- by Po Ting Lin and +2
- •
- Mechanical Engineering, Radial Basis Function, Modeling, Optimization
- by Partha Ray
- •
- Solar Cell, Nanomaterials, Nanoparticles, Thin Films
- by Gary Selwyn
- •
- Engineering, Technology, Plasma Processing, Thin Films

From measurements of the magnetic penetration depth, lambda(T)\lambda(T)lambda(T), from 1.6 K to TcT_cTc in films of electron-doped cuprates La$_{2-x}$Ce$_x$CuO$_{4-y}$ and Pr$_{2-x}$Ce$_x$CuO$_{4-y}$ we obtain the normalized density of states, Ns(E)N_s(E)Ns(E) at T=0 by using a simple model. In this framework, the flat behavior of lambda−2(T)\lambda^{-2}(T)lambda−2(T) at low TTT implies Ns(E)N_s(E)Ns(E) is small, possibly gapped, at low energies. The upward curvature in lambda−2(T)\lambda^{-2}(T)lambda−2(T) near TcT_cTc seen in overdoped films implies that superfluid comes from an anomalously small energy band within about 3kBTc3k_BT_c3kBTc of the Fermi surface.

- by tine greibe
- •
- Mathematical Physics, Condensed Matter Physics, Superfluidity, Doping
- by Dinguo Chen
- •
- Engineering, Performance, Thin Films, Optical Coatings
- by Steven George
- •
- Materials Engineering, Condensed Matter Physics, Materials Science, Density

The electrochemical behavior of Cu–Ni alloys with different Ni contents (5–65mass%) in acidic sulfate solutions was investigated. The effects of working conditions e.g. concentration of sulfate ions, immersion time and temperature were studied and discussed. In this respect, open-circuit potential measurements, polarization techniques and electrochemical impedance spectroscopy (EIS) were used. Potentiodynamic measurements revealed that the increase in the Ni content

- by Ahlam Fathi
- •
- Materials Engineering, Condensed Matter Physics, Corrosion, Thin Films
- by Sergio Calixto
- •
- Engineering, Technology, Scanning Electron Microscopy, Atomic Force Microscopy
- by Andrew Barron
- •
- Thin Films, Chemicals, Temperature, Deposition
- by Petra Uhlmann
- •
- Atomic Force Microscopy, Multidisciplinary, Thin Films, Gradient
- by Michelle Shinn
- •
- Spectroscopy, Thin Films, Annealing, Thin Film
- by Ivo Rietveld
- •
- Engineering, Manufacturing, Electrospray, Thin Films
- by Martin Brooke
- •
- Modeling, Semiconductors, Comparative Study, Field effect transistors
- by Neil Alford
- •
- Engineering, Physics, Materials Science, Applied Physics
- by Apostolos Voutsas
- •
- Engineering, Nanophotonics, Applied Physics, Semiconductor Devices
- by Altaf Karim
- •
- Engineering, Chemistry, Physical Chemistry, Microstructure

FTIR spectroscopy and scanning tunneling microscopy (STM) were used to study the molecular organization and morphology of vacuum deposited (VD) thin films of tris (8-hydroxyquinoline) aluminum (Alq3) from metal-organic planar light-emitting nanocomposites consisting of gold island films and VD Alq3 film. It was found that thermal evaporation in vacuum does not cause dissociation of Alq3, and that the obtained films are essentially amorphous. Reflection-absorption (RA) IR spectra show predominantly perpendicular orientation of quinoline groups of Alq3 molecules in the films towards the substrate. With the STM method, a thickness-dependent structure of the films was found and the first near-surface layers of Alq3 films were characterized. It has been revealed that VD deposited Alq3 films of small thickness (5–15 nm) consist of molecular domains with a particular orientation along the Au[112] direction.

- by Volodymyr Nechytailo and +1
- •
- Spectroscopy, Electroluminescent Materials, Thin Films, OLED
- by Kyung-Suk Kim
- •
- Atomistic Simulation, Fracture Mechanics, Fractals, Grain Boundaries
- by Brian Higgins
- •
- Materials Science, Convection, Mass Transfer, Heat Transfer