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  • A rational way to explore economically feasible high-performance electrocatalyst for OER is developed by improving the reaction kinetics of rate-determining step via the hybridization with electron-withdrawing RuO2 nanosheet. Even with very low RuO2 content, self-assembled Ni–Fe-/Ni–Co-layered double hydroxide (LDH)–RuO2 nanohybrids show very small overpotentials of 207/276 mV at 10 mA cm−2 for oxygen evolution reaction with greatly improved current densities.

    • Nam Hee Kwon
    • Minho Kim
    • Seong-Ju Hwang
    Article Open Access
  • Hydrophobic core/hydrophilic shell platelet glycoprotein IIb/IIIa receptor monoclonal antibody (SZ-21)/docetaxel (DTX) dual-drug loaded stents exhibiting a uniform coating of nano/micro particles using coaxial electrospray were prepared. Experimental data combined with a biphasic mathematical model indicated the release of the two drugs conformed to a diffusion-controlled release system. The core/shell SZ-21/DTX dual-drug loaded stents showed good blood and cell compatibility, promoted re-endothelialization in vivo and reduced in-stent restenosis in porcine coronary arteries. The coaxial electrospray technique is a one-step and effective technique for stent coating with multiple drugs and has great potential for helping to create the enhanced implants of the future.

    • Ruolin Du
    • Yazhou Wang
    • Guixue Wang
    Article Open Access
  • A terrace bilayer (TB) p–n junction of phthalocyanine (H2Pc) and 3,4,9,10-perylenetetracarboxylic-bis-benzimidazole (PTCBI) was studied by the use of scanning Kelvin probe microscopy, and its electronic properties was analyzed through the contact potential difference (VCPD) data for single layer region (SLR), bilayer region (BLR), and boundary region (BDR). A micrometer-localized positive potential was found in the BDR of TB of p-type on n-type, which the VCPD value was more +0.1 V than that of the BLR. Both potential gain and the design were utilized for efficient photocatalyst as oxidation power without changing molecular component, just based on the geometrical control.

    • Mohd Fairus Ahmad
    • Motoya Suzuki
    • Keiji Nagai
    Article Open Access
  • Mesocrystalline Li2FeSiO4 hollow discoids with an ordered single-crystal-like structure and highly exposed (001) facets have been successfully synthesized as a lithium-ion cathode. Li2FeSiO4@C mesocrystals display a near theoretical discharge capacity, superior rate capability and good cycling stability due to their unique structural features with a large surface area generated from the hollow mesocrystal structure and a shortened Li+ diffusion path along (001) exposed facets.

    • Zhengping Ding
    • Datong Zhang
    • Weifeng Wei
    Article Open Access
  • PVDF-HFP/PEDOT core/shell nanofibers with well-dispersed spherical bumps have been prepared using 3D electrospinning and vapor deposition polymerization methods, and their sponge-like 3D membranes are used to create piezoresistive-type pressure sensors. Owing to the enhanced porosity and pressure-tunable contact area, the sensors exhibit outstanding mechanoelectrical performance. Furthermore, large-area, wireless, 16 × 10 multi-array pressure sensors for spatiotemporal mapping of multiple pressing points and wearable bands for monitoring blood pressure have been fabricated from these 3D mats. The developed method opens up a new route for the mass production of polymer-based sensors, which is promising for biomedical diagnostics and environmental monitoring systems.

    • O. Young Kweon
    • Sang Jin Lee
    • Joon Hak Oh
    Article Open Access
  • Due to the matching energy level of CsPbI3 quantum dots and perovskite layer, the efficiency of perovskite solar cells was substantially enhanced from 15.17% to 18.56% by introducing CsPbI3 quantum dots as interface engineering layer. Moreover, perovskite solar cells with CsPbI3 QDs maintained 82% of its initial performance for 30 days at over 30% RH without any encapsulation.

    • Chang Liu
    • Manman Hu
    • Chun Cheng
    Article Open Access
  • Phase change materials are of enormous interest in the field of plasmonics and nanophotonics. For such applications, it has gone largely unnoticed that some chalcogenides accrue plasmonic properties in the transition from an amorphous to a crystalline state. In this work, we show that the phase transition-induced emergence of plasmonic properties in the crystalline state can markedly change the optical properties of subwavelength-thickness nanostructured GeSbTe films, providing for the realization of non-volatile, reconfigurable (e.g. color-tunable) chalcogenide metasurfaces operating at visible frequencies, and thus creating opportunities for developments in non-volatile optical memory, solid state displays and all-optical switching devices.

    • Behrad Gholipour
    • Artemios Karvounis
    • Nikolay I. Zheludev
    Article Open Access
  • Polymorph-dependent superconductivity was discovered in orthorhombic-structured Ti2O3 thin films, which is in strong contrast to the conventional semiconducting trigonal corundum-structured Ti2O3. Leveraging on the strong structure-property correlation in transition-metal oxides, our discovery introduces a hitherto unrecognized route towards inducing superconductivity in 3d1 electron systems via polymorph engineering.

    • Yangyang Li
    • Yakui Weng
    • Tom Wu
    Article Open Access
  • A versatile DNA-supramolecule logic platform has been constructed to implement various type of information processing functions, including data filtration (the binary and ternary INHIBIT gates), selection (the multiplexer and the demultiplexer), verification (the parity checker and the comparator), and accumulation (the counter). Since the DNA secondary structures and supramolecule assembly states can be regulated by the inputs simultaneously, all the logic operations implemented with high efficiency and excellent performance. Furthermore, several logic operations also work well in diluted human serum and show great potential applications in multiplex chemical analysis and clinical diagnosis.

    • Chunrong Yang
    • Lingbo Song
    • Yalin Tang
    Article Open Access
  • Synergetic coordination- and catecholamine surface chemistry was developed to construct an adhesive nitric oxide generating coating with copper-catecholic-selenocystamine framework through a simple one-step molecule/ion co-assembling process. The copper-catecholic-selenocystamine framework provides glutathione peroxidase (GPx)-like interfacial catalytic activity, which results in a long-term, stable and adjustable range of NO release rates from the coating. Surface functionalization by this coating endows the cardiovascular stent with the abilities to impressively improve antithrombogenicity, promote regeneration of endothelium and inhibit restenosis.

    • Xiangyang Li
    • Hua Qiu
    • Nan Huang
    Article Open Access
  • The relative molecular orientation at the donor–acceptor interface is a key factor that determines photocurrent generation in organic photovoltaics. The effects of this orientation on the photocurrent generation are investigated using bilayer devices with a sharp and unmixed donor–acceptor heterojunction. Improved exciton diffusion and charge separation are observed at the face-on donor–acceptor interface than at the edge-on interface

    • Hansol Lee
    • Dongki Lee
    • Kilwon Cho
    Article Open Access
  • Fractionating nanorod suspensions by aspect ratio strongly affects liquid crystal formation without affecting gelation, in contrast to expectations from the classic percolation-based model. Gelation is rather triggered by increasing the counterion concentration until the CNCs lose colloidal stability. As a consequence, we significantly extend the regime where we can study equilibrium liquid crystal behavior without risking arrest into a gel state.

    • Camila Honorato-Rios
    • Claudius Lehr
    • Jan P. F. Lagerwall
    Article Open Access
  • In this study, we investigate the effect of surface functional group of 2D materials on the hydrogen evolution reaction (HER) and it shows both band state (ΔGH) and the wettability of 2D catalyst influence on the onset potential. In particular, the COOH functionalized 2D materials demonstrate good catalytic effect and good stability during HER because the COOH moiety increases the polarization of the electrode related to wettability as well as reduces the hydrogen absorption energy of the Mo atom and S atom through proton transfer.

    • Hanleem Lee
    • Sora Bak
    • Hyoyoung Lee
    Article Open Access
  • The electrode based on ultradispersed sub-10 nm SnO2 nanocrystals anchored on graphene nanosheets can reversibly store Na ions through both a surface-controlled pseudocapacitive reaction and a diffusion-limited alloying reaction. The fabricated Na ion hybrid capacitor with ultradispersed sub-10 nm SnO2 nanocrystals anchored on graphene nanosheets as negative electrode exhibits superior electrochemical performance.

    • Panpan Zhang
    • Xinne Zhao
    • Wei Huang
    Article Open Access
  • A metasurface with bidirectional self-collimation modes at independent frequencies has been numerically designed and experimentally demonstrated. The unique feature provides a new working principle of utilizing surface electromagnetic waves for position-sensors and thus opens a new avenue towards coordinate sensing. A position-sensing prototype device based on the metasurface has been constructed to manifest such applications.

    • Chuandeng Hu
    • Xiaoxiao Wu
    • Weijia Wen
    Article Open Access
  • A holey graphene-wrapped porous TiNb24O62 microparticles for ultrafast pseudocapacitive lithium storage is studied. Due to the nanoscale dimensions and hierarchically porous channels of the nanocomposite material, the hybrid material exhibits both excellent rate performance and stability. Coupling with carbon nanosheet cathode, the fabricated lithium-ion capacitor demonstrate high energy and power density as well as utralong cycling stability.

    • Shaohui Li
    • Jingwei Chen
    • Pooi See Lee
    Article Open Access
  • Conductive polymers have the overlooked electrochemical properties. Nanostructures of conductive polymers, such as polypyrrole (PPy) and polythiophene (PTp) derivatives, showed the reversible redox reactions with multiple lithium ions for application to high-performance anode of lithium-ion battery. The PPy and PTp with the carboxy substituents have the enhanced specific capacity up to 730 and 963 mAh g–1, respectively.

    • Hiromichi Numazawa
    • Kosuke Sato
    • Yuya Oaki
    Article Open Access
  • GO can undergo significant physicochemical transformation in two simulated lung fluids–Gamble’s solution and artificial lysosomal fluid (ALF), as the organic acids in lung fluids cause reduction of GO. Biotransformation markedly inhibits the endocytosis of GO by scavenging macrophages. Notably, alterations in Gamble’s solution enhance the aggregation of GO in a layer-to-layer manner, resulting in GO precipitation and reduced interaction with cells, whereas changes in ALF lead to edge-to-edge aggregation of GO, enhancing the adhesion of large sheet-like GO aggregates on plasma membrane without cellular uptake.

    • Yu Qi
    • Yun Liu
    • Wei Chen
    Article Open Access