Wookha Ryu, Rui Yamada & Junji Saida

Featured Article: Metallic glass: smart heating gives alloys some wiggle room

A new apparatus for asymmetric heating of metallic glass can help these stronger-than-steel alloys avoid catastrophic failure.

Browse Articles

  • Article
    | Open Access

    Tailored hardening behavior of monolithic bulk metallic glass (BMG) is demonstrated experimentally. A 2D gradient rejuvenation is introduced into ZrCuAl BMG by a novel heat treatment method. The gradual change of free volume realizes sustainable hardening until fracture. The local free volume related to the rejuvenation state controls the shear band angle and the maximum effective shear stress. Hence, shear band propagation is prohibited and the formation of a complete shear plane transecting the whole specimen is blocked. The current approach offers a new paradigm for utilizing hardening capability of BMG as practical engineering materials.

    • Wookha Ryu
    • , Rui Yamada
    •  & Junji Saida
  • Article
    | Open Access

    Selective growth of ZnO nanorods/reduced graphene oxide composites via IR laser-induced reaction is developed for electrochemical devices. Optimized design of interdigitated supercapacitor electrodes can be achieved by programming of laser scanning lines. The integration of ZnO NRs on rGO improves supercapacitor performances due to synergistic effects of pseudo capacitance (ZnO) and electric double layer capacitance (graphene).

    • Jaemin Jung
    • , Jae Ryeol Jeong
    • , Jungjun Lee
    • , Sang Hwa Lee
    • , Soo Young Kim
    • , Myung Jun Kim
    • , Junghyo Nah
    •  & Min Hyung Lee
  • Article
    | Open Access

    An effect of atomic-scale surface modulation on the magnetic properties and the interfacial Dzyaloshinskii-Moriya interaction (IDMI) is shown in Pt/CoFeSiB/X(MgO, Ta, Ru) ultrathin films sputtered on the epitaxial Pd layers of the different thickness and surface morphology. The correlated roughness of the bottom and top interfaces of CoFeSiB increases IDMI values by up to 2.5 times, with the maximum magnitude Deff = −0.88 erg/cm2. The main reasons for this significant enhancement are the intermixing at interfaces and the correlated interface-roughness variations, which both affect electronic transport across the interface and, as a result, the degree of the electron scattering.

    • A. S. Samardak
    • , A. V. Davydenko
    • , A. G. Kolesnikov
    • , A. Yu. Samardak
    • , A. G. Kozlov
    • , Bappaditya Pal
    • , A. V. Ognev
    • , A. V. Sadovnikov
    • , S. A. Nikitov
    • , A. V. Gerasimenko
    • , In Ho Cha
    • , Yong Jin Kim
    • , Gyu Won Kim
    • , Oleg A. Tretiakov
    •  & Young Keun Kim
  • Article
    | Open Access

    To achieve growth factor-free angiogenesis, a lipopolysaccharide-mimicking dodecyl group-modified gelatin microparticle (C12-MP) was fabricated. The water suspension of C12-MP formed a syringe-injectable hydrogel with shear-thinning properties. The C12-MP hydrogel induced localized and sustained angiogenesis in vivo for 22 days by stimulation of toll-like receptor 4 accompanied by endogenous growth factor secretion.

    • Yosuke Mizuno
    •  & Tetsushi Taguchi
  • Article
    | Open Access

    In this work, we report a strategy to build programmable atom equivalents (PAEs) with tailorable DNA bond length and bond energy using DNA encoders carrying consecutive adenines (polyA). We find that the bond length and bond energy can be tuned by programming the topologic configurations of the DNA encoders, which lead to differently leveled bonds and asymmetric PAEs allowing for directional, hierarchical assembly of multi-particle structures. This programmable bonding system may provide a new route for building complex plasmonic superstructures.

    • Xiaoliang Chen
    • , Xiaoguo Liu
    • , Guangbao Yao
    • , Qian Li
    • , Renduo Liu
    • , Hongjin Wu
    • , Yanan Lv
    • , Chunhai Fan
    • , Lihua Wang
    •  & Jiang Li
  • Article
    | Open Access

    A sequentially formed hybrid hydrogel system consisting of collagen and alginate was designed to control cell shape in 3D. The cell with different spreading state had significantly different responses to mechanical (i.e., matrix stiffness) and biochemical (i.e., transforming growth factor-β1 (TGF-β1)) cues.

    • Han Liu
    • , Mian Wu
    • , Yuanbo Jia
    • , Lele Niu
    • , Guoyou Huang
    •  & Feng Xu
  • Article
    | Open Access

    We report methacrylated silk fibroin sealant (Sil-MAS) with rapid crosslinkable, highly adhesive and biocompatible properties and demonstrate its versatility as medical glue. The excellence for physical properties of Sil-MAS is revealed via in vitro mechanical tests and ex vivo aorta pressure test. In in vivo biological tests on skin, liver, and blood vessels of rat, Sil-MAS showed a superb hemostatic and adhesive ability with high biocompatibility. Specifically, Sil-MAS strongly contributed to fast wound healing. Furthermore, we showed that Sil-MAS could be an ideal photocuring laparoscopic medical glue in laceration rabbit model of liver and stomach serosa using self-made endoscopic device.

    • Soon Hee Kim
    • , Young Jin Lee
    • , Janet Ren Chao
    • , Do Yeon Kim
    • , Md. Tipu Sultan
    • , Ho Jun Lee
    • , Jung Min Lee
    • , Ji Seung Lee
    • , Ok Joo Lee
    • , Heesun Hong
    • , Hanna Lee
    • , Olatunji Ajiteru
    • , Ye Ji Suh
    • , Hak Soo Choi
    • , Yong-Jun Cho
    •  & Chan Hum Park
  • Article
    | Open Access

    We show an efficient spin injection technique for a semiconductor using an atomically controlled ferromagnet/ferromagnet/semiconductor heterostructure with low-resistive Schottky-tunnel barriers. Even for semiconductor spintronic devices, the symmetry matching of electronic bands between the ferromagnet and the semiconductor should be considered. This approach provides a new solution for the simultaneous achievement of highly efficient spin injection and low electric power at the electrodes in semiconductor devices at room temperature.

    • Michihiro Yamada
    • , Fumiaki Kuroda
    • , Makoto Tsukahara
    • , Shinya Yamada
    • , Tetsuya Fukushima
    • , Kentarou Sawano
    • , Tamio Oguchi
    •  & Kohei Hamaya

Collection

Call for Papers - Special Issue on Biomaterials and Health-care related Materials

The demand for biomaterials and health-care related materials in various medical applications has been increasing significantly across the globe over the last decade, and has been even more acute these days. This special issue of NPG Asia Materials, “Biomaterials and health-care related materials” is aimed at providing the recent advances in fundamental research on biomaterials, health-care and wearable health-monitoring materials, as well as the forefront of their medical applications. The issue invites articles that will cover original research and comprehensive review articles on topics ranging from biochemistry, biomaterials and biointerface to functional bio-devices for healthcare systems. Editors of the special issue are Jonghyun Ahn (Associate Editor, Yonsei University) and Liping Wen (Guest Editor, Chinese Academy of Sciences). Tentative publication will be in January 2021. Manuscripts must therefore be submitted by the end of July 2020. Please refer to the Guide to Authors or contact the editorial office (asiamaterials@springernature.com) on article formatting. All articles will be peer reviewed. To submit your manuscript please click here and insert ‘Biomaterials Issue’ in the Manuscript Comment section during submission.

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