THIS MONTH IN NPG ASIA MATERIALS

Volume 9, April 2017

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April 21 2017

Original Article

Phase separation of composite materials through simultaneous polymerization and crystallization

Kosuke Sato, Yuya Oaki and Hiroaki Imai

NPG Asia Mater 9: e377; doi:10.1038/am.2017.53

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Phase separation based on simultaneous polymerization and crystallization generated the segregated composite of organic crystals and conductive polymers in submicrometer scale. The phase-segregated structure of redox-active conductive polymer and quinone crystal showed the enhanced charge-storage properties based on the smooth redox reaction.

Original Article

A 3D-printed scaffold with MoS2 nanosheets for tumor therapy and tissue regeneration

Xiaocheng Wang, Tao Li, Hongshi Ma, Dong Zhai, Chuan Jiang, Jiang Chang, Jinwu Wang and Chengtie Wu

NPG Asia Mater 9: e376; doi:10.1038/am.2017.47

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A bifunctional scaffold was successfully prepared by in situ growth of MoS2 nanosheets on the 3D-printed bioceramic scaffolds via a facile hydrothermal process. The prepared scaffolds exhibit an excellent capability for both tumor therapy and tissue regeneration, offering a promising clinical strategy for effective treatment of tumor-induced tissue defects.

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April 14 2017

Original Article

Synergistic protective effect of a BN-carbon separator for highly stable lithium sulfur batteries

Patrick Joo Hyun Kim, Jihoon Seo, Kun Fu, Junghyun Choi, Zhiming Liu, Jiseok Kwon, Liangbing Hu and Ungyu Paik

NPG Asia Mater 9: e375; doi:10.1038/am.2017.51

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The BN-carbon separator was first demonstrated as a multifunctional trilayer membrane to facilitate the better electrochemical performances of Li-S batteries and protect a Li anode from unexpected side reactions. Unlike the previous approach to block the polysulfides only within the cathodic side, the concept of placing a BN interlayer on anodic side showed promising results in achieving high electrochemical performances of Li-S batteries and stable operations of lithium metal at a high current density.

Original Article

New photopatternable polyimide and programmable nonvolatile memory performances

Suk Gyu Hahm, Samdae Park and Moonhor Ree

NPG Asia Mater 9: e374; doi:10.1038/am.2017.48

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Novel digital memory devices were fabricated with a new photo-patternable polyimide (PI), poly(hexafluoroisopropylidenediphthalimide-4-cinnamoyloxytriphenylamine (6F-HTPA-CI). The finely patterned PI device cells demonstrated excellent programmable nonvolatile memory characteristics in three different modes (unipolar permanent memory, and unipolar and bipolar flash memories). Overall, this photopatternable polymer is very suitable for future energy-efficient, faster speed and high density nonvolatile memory devices in highly integrated systems.

Original Article

Single crystals of caesium formamidinium lead halide perovskites: solution growth and gamma dosimetry

Olga Nazarenko, Sergii Yakunin, Viktoriia Morad, Ihor Cherniukh and Maksym V Kovalenko

NPG Asia Mater 9: e373; doi:10.1038/am.2017.45

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Here we report an inexpensive, solution-phase growth of cm-scale single crystals of variable composition CsxFA1−xPbI3−yBry (FA=formamidinium, x=0–0.1, y=0–0.6), which exhibit improved phase stability compared to the parent α-FAPbI3 compound. High-carrier mobility–lifetime product of up to 1.2 × 10−1cm2V−1 and a low dark carrier density, combined with the high absorptivity of high-energy photons by Pb and I, allow the sensitive detection of gamma radiation. With stable operation up to 30V, these novel perovskite materials have been used in a prototype of a gamma-counting dosimeter.

Original Article

Tough, self-healable and tissue-adhesive hydrogel with tunable multifunctionality

Lu Han, Liwei Yan, Kefeng Wang, Liming Fang, Hongping Zhang, Youhong Tang, Yonghui Ding, Lu-Tao Weng, Jielong Xu, Jie Weng, Yujie Liu, Fuzeng Ren and Xiong Lu

NPG Asia Mater 9: e372; doi:10.1038/am.2017.33

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Inspired by mussel chemistry, a novel polydopamine–polyacrymide hydrogel simultaneously possesses super stretchability, stimuli-free self-healing properties, cell affinity and tissue adhesiveness. The current hydrogel lasts its adhesiveness for a long term, and can be repeatedly adhered on/stripped from a variety of substrates. The hydrogel can host various nano-building blocks and be tuned to magnetic and conductive hydrogels with above-mentioned properties.

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April 07 2017

Review

Engineering protein nanocages as carriers for biomedical applications

Sathyamoorthy Bhaskar and Sierin Lim

NPG Asia Mater 9: e371; doi:10.1038/am.2016.128

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Formed by the self-assembly of protein subunits, protein nanocages can be engineered at the interior, exterior, and inter-subunit locations. Each type of modification can be tuned for specific biological applications. Multiple-modifications can be imparted to these nanocages without compromising its self-assembling property, creating multi-functional protein nanocage platforms. Potential applications of the modified protein nanocages include targeted delivery in complex cellular environments for therapeutic and diagnostic agents as well as modulation of cellular responses.

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