نتایج جستجو برای: ultra thin film

تعداد نتایج: 240251  

2015
Daichi Chiba

Recent experimental developments on the electric field effect on magnetism in metallic magnetic materials are reviewed. The change in the electron density at the surface of metallic ultra-thin magnets by the application of an electric field results in modulations of the Curie temperature, magnetic moment, magnetic anisotropy, and domain wall velocity. The study focused on this paper is the elec...

2008
Tran M. Phung Jacob M. Jensen David C. Johnson John J. Donovan Brian G. McBurnett

The homogeneous bulk assumption used in traditional electron probe microanalysis (EPMA) can be applied for thin-layered systems with individual layers as thick as 50 nm provided the penetration depth of the lowest accelerating voltage exceeds the total film thickness. Analysis of an NIST Ni-Cr thin film standard on Si using the homogeneous model yielded certified compositions and application of...

2016
Kenjiro Fukuda Tomohito Sekine Rei Shiwaku Takuya Morimoto Daisuke Kumaki Shizuo Tokito

The realization of wearable electronic devices with extremely thin and flexible form factors has been a major technological challenge. While substrates typically limit the thickness of thin-film electronic devices, they are usually necessary for their fabrication and functionality. Here we report on ultra-thin organic transistors and integrated circuits using device components whose substrates ...

2012
R. Anton P. Wißmann

The electrical resistivity of thin palladium films deposited on amorphous substrates is measured in dependence on film thickness. The data are interpreted with the help of a statistical model taking into account structural information obtained from AES, TEM and x-ray diffraction texture analysis. The steep decrease of resistivity in the ultra-thin thickness region can be im­ mediately correlate...

2004
Haifeng Wang Wenwu Cao Qifa Zhou Kirk Shung

The quarter-wavelength (hi4) acoustic matching layer is a vital component in medical ultrasonic transducers, which can bridge the large acoustic impedance mismatch between the piezoelectric material and the human body. .At high frequencies (>5OMHz), the hi4 matching layers become extremely thin and the characterization of its properties becomes very challenging. We report a novel method to meas...

2015
Huyen Thanh Pham Thang Vu Nguyen L. Pham-Nguyen Toan Thanh Dao

In this work, we present a novel organic complementary comparator constructed of Pentacene P-channel and Fullerene N-channel thin-film transistors. These organic semiconductor materials are chosen due to their popularity and high effect-field mobility. We fabricated two new organic fieldeffect transistor types, then we measured key parameters in order to create models being used in integrated c...

2013
A. Basch F. J. Beck T. Söderström S. Varlamov K. R. Catchpole

Related Articles Near-field light concentration of ultra-small metallic nanoparticles for absorption enhancement in a-Si solar cells Appl. Phys. Lett. 102, 093107 (2013) Influence of back contact roughness on light trapping and plasmonic losses of randomly textured amorphous silicon thin film solar cells Appl. Phys. Lett. 102, 083501 (2013) Spatially resolved electrical parameters of silicon wa...

2013
S. Sahoo A. K. Satpati A. V. R. Reddy

The variables affecting determination of ultra trace levels of uranium (VI) in aqueous samples by differential pulse cathodic stripping voltammetry were examined in detail using Hg-thin film modified carbon paste and multiwall carbon nanotube (MWCNT) incorporated carbon paste electrode. Carbon paste electrode prepared in the laboratory was modified with Hg thin film and used as the working elec...

Journal: :Advanced materials 2014
Namiko Yamamoto Eleftherios Gdoutos Risaku Toda Victor White Harish Manohara Chiara Daraio

Ultra-low coefficient of thermal expansion (CTE) is an elusive property, and narrow temperature ranges of operation and poor mechanical properties limit the use of conventional materials with low CTE. We structured a periodic micro-array of bi-metallic cells to demonstrate ultra-low effective CTE with a wide temperature range. These engineered tunable CTE thin film can be applied to minimize th...

2014
Nils Nedfors Olof Tengstrand Jun Lu Per Eklund Per O A Persson Lars Hultman Ulf Jansson Per O. Å. Persson

We have deposited weakly textured substoichiometric NbB2-x thin films by magnetron sputtering from a NbB2 target. The films exhibit superhardness (42 ± 4 GPa), previously only observed in overstoichiometric TiB2 thin films, and explained by a self-organized nanostructuring, where thin TiB2 columnar grains hinder nucleation and slip of dislocations and a B-rich tissue phase between the grains pr...

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