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Over 130 cm2/Vs Hall mobility of flexible transparent conductive In2O3 films by excimer-laser solid-phase crystallization

Flexible transparent electrodes on flexible plastic sheets are in significant demand for use in flexible perovskite solar cells (f-PSCs).

  • Junichi Nomoto
  • Takashi Koida
  • Tetsuo Tsuchiya
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    SPECIAL ISSUE | Hydrogels are of great interests from the viewpoints of their diverse applications such as disposal water absorbent, tissue engineering, drug delivery, etc. New synthetic techniques as well as analytical methods have opened new gates to intelligent and advanced hydrogel-related materials.

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  • Palladium (Pd)-nonmetal nanostructures, as a special class of Pd-based alloys, have exhibited diversified advantages for fuel cell reactions. This minireview summarized the most recent progress in the synthesis of Pd-nonmetal nanostructures and their applications in fuel cells. Especially, this review proposed the promising strategies for enhancing the performance of Pd-nonmetal nanostructures in fuel cell applications. It is expected that this review will generate more research interest in the development of more advanced Pd-nonmetal nanocatalysts.

    • Mengjun Wang
    • Leigang Li
    • Xiaoqing Huang
    Review Article Open Access
  • Biohybrid micro/nanorobots that integrate biological entities with artificial nanomaterials have shown great potential in the field of biotechnology. Here, the magnetic plant biobots (MPBs) were fabricated by employing tomato-callus cultivation engineering in the presence of Fe3O4 nanoparticles that are capable of active movement and directional guidance under a transversal rotating magnetic field. The MPBs enabled rapid and efficient removal of chlorpyrifos (approximately 80%), a hazardous nerve gas agent that causes severe acute toxicity, and recovery using an external magnetic field. The eco-friendly plant biobots described here demonstrate their potential in environmental applications.

    • Su-Jin Song
    • Carmen C. Mayorga-Martinez
    • Martin Pumera
    Article Open Access
  • The first prototype of the portable protein analyzer made with liquid crystal polymer microtubes is constructed to perform the processes of suspending, depositing, and separating for protein extraction and detection by combined photo/magnetic control. Such an analyzer specifically purifies, enriches, and detects various proteins in complex samples in a short time (20 min) and with trace sample consumption (5 μL) and a low detection limit (1 μg mL-1).

    • Yao Lu
    • Lang Qin
    • Yanlei Yu
    Article Open Access
  • Solid-phase crystallized Ce and H codoped In2O3 (ICO:H) transparent conducting films achieve very high electron mobility values of over 100 cm2/Vs and suitable low-carrier concentration, leading to high electrical conductivity and broadband optical transparency. However, a high-temperature annealing process for solid-phase crystallization is necessary to obtain high mobility. Therefore, such a high processing temperature limits the formation and adoption of these films on heat-sensitive flexible substrates. Herein, we used excimer laser irradiation to achieve an ICO:H film on flexible polyethylene terephthalate that had ultrahigh mobility of 133 cm2/Vs, which is the highest among those reported for flexible transparent electrodes.

    • Junichi Nomoto
    • Takashi Koida
    • Tetsuo Tsuchiya
    Article Open Access
  • Cell-derived exosomes have been rapidly developed and applied in various biomedical fields over the last decade, holding great potentials in tissue repair such as chronic wounds due to their excellent biocompatibility and immune stability. Recent advances in regulating the features and biological functions of cell-derived exosomes by biochemical and biophysical cues in the cell microenvironment are summarized. Then microenvironmental cue-regulated exosomes as therapeutic strategies to improve chronic wound healing are discussed, and hydrogel-based exosome delivery systems used in the treatment of chronic wounds are highlighted. Finally, ongoing challenges and future opportunities are proposed.

    • Wei Dai
    • Yuchen Dong
    • Yufei Ma
    Review Article Open Access
  • Two-dimensional (2D) van der Waals (vdW) magnet with the advent of ferromagnetism has stimulated particular attention in exploring topological spin texture especially for skyrmions. We here report the real-space observation of tuning the density of field free skyrmions in Fe3GeTe2(FGT), which can serve as a new application for spintronic devices. By tilting the FGT nanosheet, we found that the field-free Bloch-type skyrmions can also represent an invisible contrast when the tilt angle is zero, but emerge a reversal magnetic contrast at high tilt angle. These findings shed light on the identification of the spin configuration in 2D vdW magnet.

    • Bei Ding
    • Xue Li
    • Wenhong Wang
    Article Open Access
  • X-ray magnetic tomography measurements were performed on an advanced high-coercivity Nd-Fe-B permanent magnet, and three-dimensional (3D) magnetic domain structure was successfully obtained along the magnetic hysteresis curve. Furthermore, scanning electron tomography measurement was adopted to obtain 3D microstructure for the same observing volume. By comparing these two types of 3D images, we found various critical behaviors of magnetic domains inside the magnet, which are essential to understand the microscopic coercivity mechanism of permanent magnets.

    • Makoto Takeuchi
    • Motohiro Suzuki
    • Satoshi Okamoto
    Article Open Access
Special issue on Hydrogels and Hydrogel-related Healing Materials

Special issue on Hydrogels and Hydrogel-related Healing Materials

Hydrogels are of great interests from the viewpoints of their diverse applications such as disposal water adsorbent, tissue engineering, drug delivery, etc. New synthetic techniques as well as analytical methods have opened new gates to intelligent and advanced hydrogel-related materials. In combination with the broad term “healing”, the hydrogel-related materials have also been experiencing remarkable innovations. Some of the healing materials are designed for their own repair, others to assist the healing of the damaged bio-organisms. This special issue of NPG Asia Materials is focusing on the recent innovations related to hydrogels and hydrogel-related healing material, and presents state-of-the-art original articles as well as comprehensive reviews in this fast-growing field.
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