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Showing 1–9 of 9 results
Advanced filters: Author: Heon-Jin Park Clear advanced filters

  • Semiconductors are promising for high performance spintronics but the low functioning temperature hampers their applications. Here the authors achieve a strong room temperature modulation of spin-dependent resistance in GaN nanowires, which marks an important step towards practical spintronic devices.

    • Tae-Eon Park
    • Youn Ho Park
    • Joonyeon Chang
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-7

  • Silicon nanostructures have important applications as functional materials. Here the authors investigate the structural transformations of 2D silicon nanosheets under compression and decompression, showing the irreversible formation of 1D silicon nanowires.

    • Gil Chan Hwang
    • Douglas A. Blom
    • Yongjae Lee
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-9

  • Photolithography is an established microfabrication technique but commonly uses costly shortwavelength light sources to achieve high resolution. Here the authors use metal patterns embedded in a flexible elastomer photomask with mechanical robustness for generation of subdiffraction patterns as a cost effective near-field optical printing approach.

    • Sangyoon Paik
    • Gwangmook Kim
    • Wooyoung Shim
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-13

  • The schematic illustrates the heat generation mechanisms of magnetic nanoparticles (MNPs) under an alternating magnetic field (AMF). Upon exposure to AMF, the magnetization vector (M) of the MNPs undergoes relaxation processes that result in heat dissipation. At low thermal stability (low σ = KeffV/kBT), Néel relaxation dominates, where spin-orbit coupling induces lattice vibrations. At high thermal stability (high σ), Brownian relaxation occurs as the physical rotation of the MNPs generates frictional heat in the surrounding medium. These combined effects of Néel and Brownian relaxation contribute to efficient heat dissipation, which is critical for advanced applications such as multiplexed neural stimulation.

    • Mingu Song
    • Dowoo Kim
    • Heon-Jin Choi
    ResearchOpen Access
    NPG Asia Materials
    Volume: 17, P: 1-14

  • Two-dimensional distorted orthorhombic GeS microribbons has been synthesized applying vapor-liquid-solid and vapor-solid mechanism-based chemical vapor transport. Polarized Raman and photoluminescence characterizations show the significantly angle-dependent intensity and anisotropic optical properties. Additionally, we probed the anisotropic electric properties by fabricating back-gate cross-shaped field effect transistors. In-plane direct current measurement demonstrated the charge carrier transport anisotropy and its anisotropic current ratio can be linearly adjusted by changing the gate voltage under dark and illumination conditions.

    • Zhangfu Chen
    • Woohyun Hwang
    • Heon-Jin Choi
    ResearchOpen Access
    NPG Asia Materials
    Volume: 14, P: 1-11