65 Result(s)

Article

Growth of Microcrystalline Silicon in Ultrathin Layers

We report recent studies of the crystallization of ultrathin (< 10 nm ) amorphous silicon layers clad by silicon dioxide. We observe changes in Raman scattering spectra which indicate that nanocrystalline sili...

Y.-J. Wu, P. D. Persans, B. Abeles, S.-L. Wang in MRS Online Proceedings Library (1989)

Article

Structural Stability of Amorphous Semiconductor Superlattices

We report recent results of studies of the structure and thermal stability of periodic multilayers based on hydrogenated amorphous silicon, hydrogenated amorphous germanium, silicon nitride and silicon oxide. ...

P. D. Persans, A. F. Ruppert, B. Abeles, Y. J. Wu… in MRS Online Proceedings Library (1989)

Article

Raman Studies of Microstructural Changes in Amorphous Silicon-Boron Alloys Due to Annealing

Crystallization of amorphous Si_l−x.B_x alloy films by annealing is studied. Amorphous Si^l−xB_x. alloy films with composition of boron x ranging from 0.01 to 0.5 are deposited on Si substrates at a temperature of 48...

G. Yang, P. Bai, Y.-J Wu, B. Y. Tong, S. K. Wong, J. Du… in MRS Online Proceedings Library (1989)

Article

Study of Oxidation Properties of Amorphous Si:B Films

Thin films of an amorphous silicon-boron alloy with boron content 1–50 at.% have been deposited by low pressure chemical vapor deposition (LPCVD). The boron content and film thickness of the samples were contr...

G.-R. Yang, T.C. Nason, Y.-J. Wu, B. Y. Tong, S. K. Wong in MRS Online Proceedings Library (1991)

Article

Raman Scattering in Electrochemically Prepared Porous Silicon

Porous silicon of various porosity has been prepared by electrochemical etching of silicon with different do** levels. Room temperature photoluminescence in the visible range is observed from the powder scra...

Y. -J. Wu, X. -S. Zhao, P. D. Persans in MRS Online Proceedings Library (1991)

Chapter and Conference Paper

2-D MOSFET Simulation by Self-Consistent Solution of the Boltzmann and Poisson Equations Using a Generalized Spherical Harmonic Expansion

MOSFET simulation is performed by direct self-consistent solution of the Boltzmann, Poisson and Hole Continuity equations. To formulate the Boltzmann equation, a spherical harmonic approach has been developed ...

W.-C. Liang, Y-J. Wu, K. Hennacy, S. Singh… in Simulation of Semiconductor Devices and Pr… (1995)

Chapter

2-Dimensional Mosfet Analysis Including Impact Ionization by Self-Consistent Solution of the Boltzmann Transport and Poisson Equations Using a Generalized Spherical Harmonic Expansion Method

We present a new 2-D MOSFET simulation tool which employs a spherical harmonic expansion to deterministically solve the Boltzmann transport equation (BTE), and thereby provide the distribution function for the...

W. C. Liang, Y.-J Wu, K. Hennacy, S. Singh, N. Goldsman… in Hot Carriers in Semiconductors (1996)

Article

Dielectric characteristics of Ba(Mg_1/3Ta_2/3)O₃ ceramics sintered at low temperatures

Dielectric characteristics of Ba(Mg_1/3Ta_2/3)O₃ ceramics (BMT ceramics) sintered at low temperatures with 2–3 wt% NaF additives were determined. A dielectric constant of 25 and extremely low dielectric loss (< 0.0...

X. M. Chen, Y. J. Wu in Journal of Materials Science: Materials in Electronics (1996)

Article

Effects of NaF upon sintering temperature of Ba(Mg_1/3Ta_2/3)O₃ dielectric ceramics

The effects of NaF additive upon the sintering temperature of Ba(Mg_1/3Ta_2/3)O₃ dielectric ceramics were investigated, and the densification of the present ceramics could be performed well at lower temperatures, e...

X. M. Chen, Y. J. Wu in Journal of Materials Science: Materials in Electronics (1996)

Article

Comparison of Effects of Verapamil and Quercetin on Delayed Polyneuropathy Induced by Tri-o-Cresyl Phosphate in Hens

Y.-J. Wu, X.-F. Leng in Bulletin of Environmental Contamination and Toxicology (1997)

Article

Structure and spectroscopic characterization of polycrystalline vanadyl phthalocyanine (VOPc) films fabricated by vacuum deposition

Y.L. Pan, Y.J. Wu, L.B. Chen, Y.Y. Zhao, Y.H. Shen, F.M. Li, S.Y. Shen… in Applied Physics A (1998)

Article

Effects of Mo and Al Additions on the Sulfidation Behavior of 310 Stainless Steel

The high-temperature sulfidation behavior of 310stainless steel (310SS) with Mo and Al additions (up to10 at.%) was studied over the temperature range700-900°C in pure-sulfur vapor over the range of 10^-3 to 10^-1 ...

W. Kai, C. J. Leu, Y. J. Wu in Oxidation of Metals (1998)

Article

Optimal Predicted Fuzzy PI Gain Scheduling Controller of Constant Turning Force Systems with Fixed Metal Removal Rate

C.-H. Hsieh, J.-H. Chou, Y.-J. Wu in The International Journal of Advanced Manu… (2002)

Article

First-Passage Time of Duffing Oscillator under Combined Harmonic and White-Noise Excitations

The first-passage time of Duffing oscillator under combined harmonic andwhite-noise excitations is studied. The equation of motion of the system is firstreduced to a set of averaged Itô stochastic differential...

W. Q. Zhu, Y. J. Wu in Nonlinear Dynamics (2003)

Article

Preparation of high-quality ß-SiC nanowhiskers by using carbon fibres as carbon source

Y. J. Wu, W. Qin, Z. X. Yang, J. S. Wu, Y. F. Zhang in Journal of Materials Science (2004)

Article

Determination of Sophocarpine, Matrine, and Sophoridine in KUHUANG Injection by GC-MS

A GC-MS procedure was developed to determine sophocarpine (SC), matrine (MT), and sophoridine (SRI) in KUHUANG injection. The chromatographic separation was performed on an HP-5MS column (30 m × 0.35 mm inner ...

Y.-J. Wu, J.-J. Chen, Y.-Y. Cheng in Journal of Analytical Chemistry (2005)

Article

First-passage failure of strongly nonlinear oscillators under combined harmonic and real noise excitations

First-passage failure of strongly nonlinear oscillators under combined harmonic and real noise excitations is studied. The motion equation of the system is reduced to a set of averaged Itô stochastic different...

Y. J. Wu, M. Luo, W. Q. Zhu in Archive of Applied Mechanics (2008)

Article

Formation of a lamellar 14H-type long period stacking ordered structure in an as-cast Mg–Gd–Zn–Zr alloy

A novel as-cast Mg_96.82Gd₂Zn₁Zr_0.18 alloy was produced by conventional ingot metallurgy. By scanning electron microscope and transmission electron microscope observations, its as-cast microstructure is mainly com...

Y. J. Wu, D. L. Lin, X. Q. Zeng, L. M. Peng, W. J. Ding in Journal of Materials Science (2009)

Article

Formation of 14H-type long period stacking ordered structure in the as-cast and solid solution treated Mg-Gd-Zn-Zr alloys

The coherent fine lamellae consisting of the 2H-Mg and the 14H-type long period stacking ordered (LPSO) structure within α′-Mg matrix have been first observed in an as-cast Mg_96.32Gd_2.5Zn₁Zr_0.18 alloy. During sub...

W. J. Ding, Y. J. Wu, L. M. Peng, X. Q. Zeng, G. Y. Yuan… in Journal of Materials Research (2009)