Hyunwoong Na

Unveiling nanoscale functional properties of perovskite and low-dimensional materials via scanning probe microscopy for energy conversion

Howoong Lee, Hyunwoong Na, Chanhyeok Kim, Jaehoon Kim et autres

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Tailoring ferroelectricity via non-electrical external stimuli

Chanhyeok Kim, Howoong Lee, Hyunwoong Na, Taewoo Kim et autres

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Magnetic Force Microscopy Studies of 2D Materials

Tae‐Woo Kim, Hyunwoong Na, Ho-Woong Lee, Yooun Heo et autres

2차원 자성 물질은 전이 금속 칼코겐화합물 및 반데르발스 자성 결정과 같은 원자층 수준의 결정 구조를 가지며, 기존 벌크 물질에서는 관찰되지 않는 고유의 자기적 특성을 보인다. 이러한 시스템에서의 자기 상호작용과 위상학적 스핀 구조 연구는 차세대 스핀트로닉스 및 양자 정보 기술 응용을 위한 핵심 …

Effect of Sn addition on the low temperature shrinkage of Ni nanoparticles

Jongwon Lee, Hyung‐Ho Kim, Hyunwoong Na, Jeong-Ryeol Kim et autres

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Graphitic carbon-based core-shell platinum electrocatalysts processed using nickel nanoparticle template for oxygen reduction reaction

Hyunwoong Na, Hanshin Choi, Ji-Won Oh, Youngeun Kim et autres

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Radio frequency thermal plasma-processed Ni-W nanostructures for printable microcircuit electrodes

Hyunwoong Na, Jae Woo Park, Hanshin Choi, Yong Soo Cho

Nonconventional alloy systems have been actively investigated to find an appropriate electrode candidate for highly integrated microcircuit applications. Here, a Ni-W nanoscale-alloy system is introduced to modulate the unwanted early densification of Ni nanoparticles by adopting a considerable amount of W in …

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In situ processed tungsten carbide/carbon black-supported platinum electrocatalysts for enhanced electrochemical stability and activity

Hyunwoong Na, Hanshin Choi, Ji-Won Oh, Da Bin Kim et autres

An in situ synthesis technique of tungsten carbide on carbon black support via cathodic arc deposition is introduced to satisfy both the performance-efficiency and long-term durability of Pt-based electrocatalysts.

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Enhanced CO Oxidation and Cyclic Activities in Three-Dimensional Platinum/Indium Tin Oxide/Carbon Black Electrocatalysts Processed by Cathodic Arc Deposition

Hyunwoong Na, Hanshin Choi, Ji-Won Oh, Ye Seul Jung et autres

There have been extensive efforts to develop competitive electrocatalysts using carbon black (CB) supports for high-performance proton-exchange membrane fuel cells with less usage of Pt. Herein, we propose a very promising electrocatalyst architecture based on the three-dimensional Pt/indium tin oxide (ITO)/CB support …

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In Situ Synthesis of Bimetallic Tungsten-Copper Nanoparticles via Reactive Radio-Frequency (RF) Thermal Plasma

Ji-Won Oh, Hyunwoong Na, Yong Soo Cho, Hanshin Choi

We synthesize, in situ, W- x wt% Cu ( x = 5, 10, and 20 wt%) composite nanoparticles using inductively coupled radio-frequency (RF) thermal plasma. In the RF thermal plasma process, the W- x wt% Cu composite nanoparticles are synthesized by hydrogen …

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Densification behavior and electrical properties of carbon nanotube-Ni nanocomposite films for co-fireable microcircuit electrodes

Jin Woo Jang, Hong Je Choi, Oh Hyeon Kwon, Hyunwoong Na et autres

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Technology Trend of the additive Manufacturing (AM)

JI-Won Oh, Hyunwoong Na, Hanshin Choi

적층식 제조(Additive manufacturing) 기술동향

JI-Won Oh, Hyunwoong Na, Hanshin Choi