16 Result(s)

Article

Evolution of Microcracks in Epitaxial CeO₂ Thin Films on YSZ-Buffered Si

Epitaxial buffer layers such as ceria (CeO₂)/yttria-stabilized zirconia (YSZ) allow the direct integration of functional oxide single crystal thin films on silicon (Si). Microcracks in the buffer layer, often evo...

Soo Young Jung, Hyung-** Choi, Jun Young Lee, Min-Seok Kim… in Electronic Materials Letters (2024)

Article

Selective Area Epitaxy of Complex Oxide Heterostructures on Si by Oxide Hard Mask Lift-Off

Epitaxial complex oxide heterostructures on Si are an excellent platform for the realization of multifunctional electronic devices to exploit the unique functionalities of the oxides that Si does not possess. ...

Ruiguang Ning, Soo Young Jung, Haneul Choi… in Electronic Materials Letters (2023)

Article

Determination of the continuous cooling transformation diagram of a high strength low alloyed steel

The continuous cooling transformation diagram of a high strength low alloyed steel was determined by a dilatometer and microscopic analysis (OM, SEM) as well as thermodynamic analysis. As expected, Widmanstätt...

Hun Chul Kang, Bong June Park, Ji Hun Jang… in Metals and Materials International (2016)

Article

Microstructural evolution in semisolid forging of A356 alloy

A semisolid forging study using A356 alloy was carried out to investigate the evolution of microstructures affected by the solid fraction, the forging pressure and the addition of Sr. The semisolid slurry for ...

Byung Keun Kang, Chun Pyo Hong, Byoung Hee Choi… in Metals and Materials International (2015)

Article

Controlled hydrothermal growth of multi-length-scale ZnO nanowires using liquid masking layers

In this study, we demonstrate a method for creating multi-length-scale ZnO nanowires in a controllable manner on diverse planar and curvilinear substrates by introducing immiscible liquid masking layers (LMLs)...

Hun Soo Jang, Bokyeong Son, Hui Song, Gun Young Jung… in Journal of Materials Science (2014)

Article

Peel strength of sputtered FCCL(Flexible Copper Clad Laminate) using Ar:O₂ mixed gas preprocessing and a Ni-Cr seed layer

The PI surface was modified with ion beams in a vacuum chamber to increase the surface area. A two-way Design of Experiments (“DOE”) was performed by varying the DC power and changing the proportion of O₂ gas wit...

Woo-Young Ahn, Joong Soon Jang in Electronic Materials Letters (2014)

Article

Symmetrically functionalized diketopyrrolopyrrole with alkylated thiophene moiety: from synthesis to electronic devices applications

A symmetrically conjugated molecular semiconductor derived from diketopyrrolopyrrole (DPP), i.e., 2,5-dihexadecyl-3,6-bis(5-(3-hexylthiophen-2-yl)thiophen-2-yl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione [DPP(3HT) ...

Akshaya K. Palai, Jihee Lee, Minkyung Jea, Hanah Na… in Journal of Materials Science (2014)

Article

Red fluorescent DCM derivatives with the bulky adamantyl and bicyclo[2,2,2]octyl groups for organic light emitting diodes (OLEDs)

A red fluorescent compound, 4-(dicyanomethylene)-2-(1-pentylbicyclo[2,2,2]oct-4-yl)-6-(1-adamantyl-1,7,7-trimethyljulolidyl-9-enyl)-4H-pyran containing bulky adamantyl and 1-pentylbicyclo[2,2,2]octyl groups on...

Heung Soo Jang, Kum Hee Lee, Seok Jae Lee, Young Kwan Kim… in Electronic Materials Letters (2013)

Article

Design for reliability of ferrite for electronics materials

An accelerated life test for miniaturized ferrite cores used in SMD type inductors is proposed. Conventionally, temperature cycling test is performed to check whether cracks are initiated and propagated or not...

Hyoung-Seuk Choi, Kang-Dong Kim, Joong Soon Jang in Electronic Materials Letters (2011)

Article

Effect of Aluminum Content on the Microstructure and Mechanical Properties of Hypereutectoid Steels

Hypereutectoid steels with 0, 0.69, 1.29, and 1.95 wt pct aluminum were prepared. The samples were hot rolled at 1100 °C followed by cooling in air. The microstructure of the as-rolled samples was characterize...

Yoon Soo Jang, M.P. Phaniraj, Dong-Ik Kim… in Metallurgical and Materials Transactions A (2010)

Article

Si-diffused GaN for enhancement-mode GaN mosfet on si applications

Si diffusion into GaN was studied as a function of encapsulant type (SiO₂ or SiN_x) and diffusion temperature. Using a SiO₂ encapsulant, the Si diffusion exhibited an activation energy of 0.57 eV with a prefactor ...

Soohwan Jang, F. Ren, S. J. Pearton, B. P. Gila, M. Hlad… in Journal of Electronic Materials (2006)

Article

Selective and nonselective wet etching of Zn_0.9Mg_0.1O/ZnO

Wet etch rates at 25°C for Zn_0.9Mg_0.1O grown on sapphire substrates by pulsed laser deposition (PLD) were in the range 300–1100 nm · min⁻¹ with HCl/H₂O (5×10⁻³−2×10⁻² M) and 120–300 nm · min⁻¹ with H₃PO₄/H₂O (5×1...

Jau-Jiun Chen, Soohwan Jang, F. Ren, Yuanjie Li… in Journal of Electronic Materials (2006)

Article

Soft Chemical Routes to Heterostructured High-T_c Superconducting Materials

**-Ho Choy, Soon-Jae Kwon, Seong-Ju Hwang, Eue-Soon Jang in MRS Bulletin (2000)