Terahertz detectors: Improved sensitivity at crystal interfaces

New vibrational modes generated by low-cost organic–inorganic crystals could be of value for terahertz devices used for non-invasive cell and tissue imaging.

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    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 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. (Submission deadline: 31OCT2021)

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    Field-like spin–orbit torque induced by bulk Rashba channels in GeTe/NiFe bilayers

  • Special Issue on Biomaterials and Health-care related Materials

    SPECIAL ISSUE | 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…

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  • We found new phonon vibration modes in formamidinium (FA)-based hybrid perovskite structures. We intriguingly found that the δ/α-mixed-phase exhibited significant THz-wave absorption peaks at 2.0 and 2.2 THz that were not related to any phonon modes from either the δ- or α-phases, although the δ/α-mixed-phase sample was confirmed to be formed by a physical combination of the δ- and α-phases without the creation of any new chemical states. From the theoretical study, they originate from the novel vibration modes excited at the seamless interfaces in the mixed phase of FAPbI3.

    • Inhee Maeng
    • Seungjun Lee
    • Min-Cherl Jung
    Article Open Access
  • Combining molecular dynamics and finite element modeling, a possible mechanism of the moisture-induced shape memory effect of wood cell walls is explored, emphasizing the role of interface mechanics, a factor previously overlooked. Upon wetting, the interface is weak and soft, and the material can be easily deformed. Upon drying, the interface becomes strong and stiff, and composite deformation can be locked. When the interface is wetted again and weakened, the previously locked deformation cannot be sustained, and recovery occurs. The elastic energy and topological information stored in the cellulose fiber network is the driving force of the recovery process.

    • Chi Zhang
    • Mingyang Chen
    • Jan Carmeliet
    Article Open Access
  • Schematic illustration of functional injectable hydrogel system for cartilage regeneration. (1) Preparation of hydrogel with the function for spatiotemporal releasing SDF-1 and KGN; (2) Spatiotemporal regulation of MSCs recruitment and chondrogenic differentiation by hydrogel in vitro; (3) Implantation of hydrogel and cartilage regeneration.

    • Yunsheng Dong
    • Yufei Liu
    • Qiang Yang
    Article Open Access
  • We investigate how random scattering modulates the optical properties, from terahertz to ultraviolet, of a three-dimensional graphene network based on interconnected high-quality 2-Dimensional graphene layers. We show how the connectivity and morphology of these materials allow a broadband interaction with light. The 3D graphene networks behave like a high-pass optical filter due to spatially multiscale random scatterers, corresponding to pores and graphene branches in the 3D network. We develop a model based on the Radiative Transfer theory describing the interaction of the network with light, from which we estimate the photon scattering mean free path.

    • Luca Tomarchio
    • Salvatore Macis
    • Stefano Lupi
    Article Open Access
  • 3D printing of bioceramic-induced macrophage exosomes (BC-Exos) displayed stimulatory effects on immunomodulation, osteogenesis, and angiogenesis of macrophage (MΦs), mesenchymal stem cells (MSCs) and endothelial cells (ECs), respectively. BC-Exos enhanced the expression of chemotaxis, osteogenic and angiogenic genes by altering their miRNAs profile. 3D printing of BC-Exos offers a new cell-free strategy for tissue regeneration.

    • Yuhua Sun
    • Bingjun Zhang
    • Chengtie Wu
    Article Open Access
  • The introduction of minimal Ni into MnCoSi efficiently changes the magnetic interaction and establish a thermal-induced magnetic transition from a spiral magnetic state to a ferromagnetic-like state in Mn1-xNixCoSi alloys. With increasing the temperature, both the cycloidal and helical magnetic spin rotates continuously and coherently towards to b axis during the transition. Therefore, a wide-temperature range zero thermal expansion behaviour is realized owing to the robust magnetoelastic coupling.

    • Jun Liu
    • Bei Ding
    • Wenhong Wang
    Article Open Access
  • We provide a conclusive demonstration of strain-induced room-temperature ferroelectricity in SrMnO3 thin films by securing samples with insulating properties and clean surfaces using selective oxygen annealing. These findings will not only provide a cornerstone for exploring the physical properties of multiferroic SrMnO3 but will also inspire new directions for single-phase multiferroics.

    • Hyunji An
    • Young-Gyun Choi
    • Sanghan Lee
    Article Open Access
  • A classification of Fe-pnictide heterointerfaces based on electrostatic principles into initially compensated and uncompensated interfaces is proposed and used for tailoring the interfacial microstructure and superconducting properties. We show that the heterointerface between LnOFeAs (Ln = La, Sm) and BaFe2As2 is nonpolar and remains clean and coherent with Co2+ addition. Co-diffusion results in superconductivity across the whole bilayer. In contrast, IFL formation occurs after adding O2−, and superconductivity with a 2D signature develops with time.

    • Silvia Haindl
    • Sergey Nikolaev
    • Ian MacLaren
    Article Open Access
Special Issue on Biomaterials and Health-care related Materials

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, biointeractions, health-care and wearable health-monitoring materials, as well as the forefront of their medical applications. The issue covers original research and comprehensive review articles on topics ranging from biochemistry, biomaterials and biointerfaces to functional bio-devices for advanced research and healthcare systems.
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