19 Result(s)

Article

Theory of Electronic, Optical and Transport Properties in Silicon Quantum Wires

G. D. Sanders, C. J. Stanton, Y. C. Chang in MRS Online Proceedings Library (1992)

Article

Composition and stability of Ω phase in an Al-Cu-Mg-Ag Alloy

Transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDS) were employed to determine the stability and composition of the Ω phase in an Al-Cu-Mg-Ag alloy. It is shown that the Ω. ph...

Y. C. Chang, J. M. Howe in Metallurgical Transactions A (1993)

Article

Analysis of Interface Dynamics in Solid-State Phase Transformations by In Situ Hot-Stage High-Resolution Transmission Electron Microscopy

In situ hot-stage high-resolution transmission electron microscopy (HRTEM) provides unique capabilities for quantifying the dynamics of interfaces at the atomic level. Such information is critical for understandi...

James M. Howe, W. E. Benson, A. Garg, Y.-C. Chang in MRS Online Proceedings Library (1994)

Article

Dam** characteristics of Ti₅₀Ni_49.5Fe_0.5 and Ti₅₀Ni₄₀Cu₁₀ ternary shape memory alloys

The dam** characteristics of Ti₅₀Ni_49.5Fe_0.5 and Ti₅₀Ni₄₀Cu₁₀ ternary shape memory alloys (SMAs) have been systematically studied by resonant-bar testing and internal friction (IF) measurement. The dam** capa...

U. C. Lin, S. K. Wu, Y. C. Chang in Metallurgical and Materials Transactions A (1995)

Article

Growth and Characterization of Interfaces in P-Type InGaAs/InP Quantum-Well Infrared Photodetectors with Ultra-Thin Quantum Wells

P-type InGaAs/InP quantum-well infrared photodetectors operated at 4.55 μm require the growth of ultra-thin (10 Å) quantum wells. We report a study of interfaces in QWIPs grown by gas-source molecular beam epi...

D. K. Sengupta, S. Kim, T. Horton, H. C. Kuo, S. Thomas… in MRS Online Proceedings Library (1996)

Article

Lead Iodide X-Ray and Gamma-Ray Spectrometers for Room and High Temperature Operation

In this study we report on the results of the investigation of lead iodide material properties. The effectiveness of a zone refining purification method on the material purity is determined by ICP-MS and ICP-O...

H. Hermon, R. B. James, J. Lund, E. Cross, A. Antolak… in MRS Online Proceedings Library (1997)

Article

Photoluminescence Excitation Study of Lo-Phonon Assisted Excitonic Transitions in GaN

We report the results of a photoluminescence excitation (PLE) study on excitonic transitions in GaN. PLE measurements were carried out as a function of temperature to investigate exciton formation, thermalizat...

S.J. Hwang, Y.H. Cho, J.J. Song, W. Shan, Y.C. Chang in MRS Online Proceedings Library (1997)

Article

Monolithically Integrated Dual-Band Quantum Well Infrared Photodetector

A monolithic quantum well infrared photodetector (QWIP) structure has been presented that is suitable for dual bands in the two atmospheric transmission windows of 3 - 5.3 fum and 7.5 - 14fum, respectively. Th...

D. K. Sengupta, S. D. Gunapala, S. V. Bandara, F. Pool… in MRS Online Proceedings Library (1997)

Article

Bandgap Shifting of an Ultra-Thin InGaAs/InP Quantum Well Infrared Photodetector via Rapid Thermal Annealing

We demonstrate that SiO₂ cap rapid thermal annealing in ultra-thin p-type InGaAs/InP quantum wells can be used to produce large blue shifts of the band edge. A substantial bandgap blue shift, as much as 292.5 meV...

D. K. Sengupta, S. Kim, H. C. Kuo, A. P. Curtis… in MRS Online Proceedings Library (1998)

Article

Novel E2F decoy oligodeoxynucleotides inhibit in vitro vascular smooth muscle cell proliferation and in vivo neointimal hyperplasia

The transcription factor, E2F, plays a critical role in the trans-activation of several genes involved in cell cycle regulation. Previous studies showed that the transfection of cis element double-stranded dec...

J D Ahn, R Morishita, Y Kaneda, H S Kim, Y-C Chang, K-U Lee, J-Y Park… in Gene Therapy (2002)

Article

Thermal Conductivity of GaN Grown on Silicon Substrates

One of the principle problems of high power electronic devices is the extraction of heat from the active region of the device¹. The thermal conductivity of the substrate is a crucial parameter affecting the therm...

C. Mion, Y. C. Chang, J. F. Muth, P. Rajagopal… in MRS Online Proceedings Library (2003)

Article

Transcription factor decoy for AP-1 reduces mesangial cell proliferation and extracellular matrix production in vitro and in vivo

Diabetic nephropathy is characterized by an expansion of glomerular mesangium, caused by mesangial cell proliferation and excessive accumulation of extracellular matrix (ECM) proteins, which eventually leads t...

J D Ahn, R Morishita, Y Kaneda, H J Kim, Y D Kim, H J Lee, K U Lee… in Gene Therapy (2004)

Article

Spin Lifetime Tuning in Zincblende Heterostructures and Tions to Spin Devices

We present analytical expressions for the D’yakonov-Perel’ spin relaxation rates under the combined action of bulk and structural inversion asymmetry for [111] zincblende heterostructures when terms up to line...

X. Cartoixà, D. Z.-Y. Ting, Y.-C. Chang in MRS Online Proceedings Library (2004)

Article

Anisotropic wet etching on birefringent calcite crystal

In this paper, a mechanism for wet etching on birefringent calcite crystal is discussed. By altering the etchant type, its concentration and the stirring speed, the etching mechanism can be confined within the...

C.M. Wang, Y.C. Chang, C.D. Sung, H.T. Tien, C.C. Lee, J.Y. Chang in Applied Physics A (2005)

Article

Ring-Sp1 decoy oligonucleotide effectively suppresses extracellular matrix gene expression and fibrosis of rat kidney induced by unilateral ureteral obstruction

Tubulointerstitial fibrosis is the consequence of an injury characterized by the accumulation of excess collagen and other extracellular matrix components, resulting in the destruction of the normal kidney arc...

Y-M Chae, K-K Park, I-K Lee, J-K Kim, C-H Kim, Y-C Chang in Gene Therapy (2006)

Article

Near-field observation of plasmon excitation and propagation on ordered elliptical hole arrays

We report a near-field study of the excitation and propagation of surface plasmon on ordered Ag elliptical hole arrays with a scattering-type scanning near-field optical microscope. Strong dipole-like local pl...

J.-Y. Chu, T.-J. Wang, J.-T. Yeh, M.-W. Lin, Y.-C. Chang, J.-K. Wang in Applied Physics A (2007)

Article

Optical Characterization of High Quality GaN Produced by High Rate Magnetron Sputter Epitaxy

The thick films of GaN were investigated using X-ray diffraction, micro-Raman spectroscopy and photoluminescence spectroscopy. The thick films of GaN were prepared on (0001) sapphire using high rate magnetron ...

Minseo Park, E. Carlson, Y. C. Chang, J. F. Muth… in MRS Online Proceedings Library (2011)

Article

Crystallographic structure and magnetic properties of polycrystalline FePd thin films on glass substrate

Polycrystalline FePd films with thicknesses of 30 ± 2 nm were prepared by magnetron sputtering on glass substrate. The crystallographic structure and magnetic properties as a function of substrate temperatures (

S. H. Liu, C. C. Chen, S. N. Hsiao, S. K. Chen, Y. C. Chang, S. H. Su… in Applied Physics A (2015)