22 Result(s)

Article

Repetitive Nanosecond Laser-Induced Oxidation and Phase Transformation in NiTi Alloy

NiTi shape memory alloys, known as Nitinol, are highly valuable in medical fields for their unique attributes, including superelasticity, wear resistance, and biocompatibility. Laser treatment provides precise...

Haneul Choi, Min Young Na, Indong Jun, Hojeong Jeon… in Metals and Materials International (2024)

Article

Size-dependent deformation behavior in nanosized amorphous metals suggesting transition from collective to individual atomic transport

The underlying atomistic mechanism of deformation is a central problem in mechanics and materials science. Whereas deformation of crystalline metals is fundamentally understood, the understanding of deformatio...

Naijia Liu, Sungwoo Sohn, Min Young Na, Gi Hoon Park, Arindam Raj… in Nature Communications (2023)

Article

Voltage control of magnetism in Fe_3-xGeTe₂/In₂Se₃ van der Waals ferromagnetic/ferroelectric heterostructures

We investigate the voltage control of magnetism in a van der Waals (vdW) heterostructure device consisting of two distinct vdW materials, the ferromagnetic Fe_3-xGeTe₂ and the ferroelectric In₂Se₃. It is observed ...

Jaeun Eom, In Hak Lee, Jung Yun Kee, Minhyun Cho, Jeongdae Seo… in Nature Communications (2023)

Article

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

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

Article

Mechanically derived short-range order and its impact on the multi-principal-element alloys

Chemical short-range order in disordered solid solutions often emerges with specific heat treatments. Unlike thermally activated ordering, mechanically derived short-range order (MSRO) in a multi-principal-ele...

Jae Bok Seol, Won-Seok Ko, Seok Su Sohn, Min Young Na… in Nature Communications (2022)

Article

Elemental and isotopic compositions in blank filters collecting atmospheric particulates

The atmospheric particulates can be harmful to human health due to toxic substances sorbed onto particulates. Although the atmospheric particulates have been collected using different types of filters, few stu...

Jiyeong Lee, Jong-Sik Ryu, Seok Jeong… in Journal of Analytical Science and Technolo… (2021)

Article

Atomically sculptured heart in oxide film using convergent electron beam

We demonstrate a fabrication of an atomically controlled single-crystal heart-shaped nanostructure using a convergent electron beam in a scanning transmission electron microscope. The delicately controlled e-b...

Gwangyeob Lee, Seung-Hyub Baek, Hye Jung Chang in Applied Microscopy (2021)

Article

High-density Néel-type magnetic skyrmion phase stabilized at high temperature

The discovery of a thermally stable, high-density magnetic skyrmion phase is a key prerequisite for realizing practical skyrmionic memory devices. In contrast to the typical low-density Néel-type skyrmions obs...

Hee Young Kwon, Kyung Mee Song, Juyoung Jeong, Ah-Yeon Lee… in NPG Asia Materials (2020)

Article

Microscopic analysis of metal matrix composites containing carbon Nanomaterials

Metallic matrix composites reinforced with carbon nanomaterials continue to attract interest because of their excellent mechanical, thermal, and electrical properties. However, two critical issues have limited...

Daeyoung Kim, Hye Jung Chang, Hyunjoo Choi in Applied Microscopy (2020)

Article

Microscale BTS sculptured by electron beam

We applied the advanced bitmap-assisted patterning function of focused ion beam to fabricate microscale sculpture of the ‘BangTanSoNyeonDan’ known as BTS members, the world-wide famous K-pop boyband. With the ...

Haneul Choi, Young Woo Jeong, Hye Jung Chang in Applied Microscopy (2019)

Article

Lead chromate detected as a source of atmospheric Pb and Cr (VI) pollution

Spherical black carbon aggregates were frequently observed in dust dry deposition in Daejeon, Korea. They were tens of micrometers in diameter and presented a mixture of black carbon and several mineral phases...

Pyeong-Koo Lee, Soonyoung Yu, Hye Jung Chang, Hye Young Cho… in Scientific Reports (2016)

Article

Free-electron creation at the 60° twin boundary in Bi₂Te₃

Interfaces, such as grain boundaries in a solid material, are excellent regions to explore novel properties that emerge as the result of local symmetry-breaking. For instance, at the interface of a layered-cha...

Kwang-Chon Kim, Joohwi Lee, Byung Kyu Kim, Won Young Choi… in Nature Communications (2016)

Article

Thermal stability of 2DEG at amorphous LaAlO₃/crystalline SrTiO₃ heterointerfaces

At present, the generation of heterostructures with two dimensional electron gas (2DEG) in amorphous LaAlO₃ (a-LAO)/SrTiO₃ (STO) has been achieved. Herein, we analysed thermal stability of 2DEG at a-LAO/STO inte...

Seon Young Moon, Cheon Woo Moon, Hye Jung Chang, Taemin Kim… in Nano Convergence (2016)

Article

Resistance switching behavior of atomic layer deposited SrTiO₃ film through possible formation of Sr₂Ti₆O₁₃ or Sr₁Ti₁₁O₂₀ phases

Identification of microstructural evolution of nanoscale conducting phase, such as conducting filament (CF), in many resistance switching (RS) devices is a crucial factor to unambiguously understand the electr...

Woongkyu Lee, Sijung Yoo, Kyung Jean Yoon, In Won Yeu, Hye Jung Chang… in Scientific Reports (2016)

Article

Giant Electroresistive Ferroelectric Diode on 2DEG

Manipulation of electrons in a solid through transmitting, storing and switching is the fundamental basis for the microelectronic devices. Recently, the electroresistance effect in the ferroelectric capacitors...

Shin-Ik Kim, Hyo ** Gwon, Dai-Hong Kim, Seong Keun Kim, Ji-Won Choi… in Scientific Reports (2015)