Physical sciences articles within NPG Asia Materials

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  • Article
    | Open Access

    A liquid–solid dual-phase magnetoactive microlattice metamaterial composed of flexible 3D-printed polymer shell and magnetorheological (MR) fluid has been designed and fabricated. The MR fluid-filled magnetoactive microlattices demonstrated remarkable recoverability (~50%) and be substantially stiffened in the presence of a magnetic field, with an ~200% increment in stiffness at 60 mT. Based on specific applications, the mechanical properties of this magnetoactive microlattice metamaterial can be modulated on demand, leading to certain programmable stress-strain behavior.

    • Wenqiang Zhang
    • , Jingzhuo Zhou
    •  & Yang Lu

  • Article
    | Open Access

    Drawing inspiration from the structural attributes of mussels, we have introduced a riveting layer into our hydrogel-plastic hybrids, facilitating robust bonding between hydrogel networks and plastic substrates. This work underscores the immense potential and advantages that this integration of hydrogels and plastics holds, especially in the development of intelligent robotics.

    • Zhixuan Wen
    • , Teng Zhou
    •  & Lei Jiang

  • Article
    | Open Access

    In this work, we report a strategy with which to realize efficient manipulation of CNT networks by forming double networks with branched polyethylenimine (PEI). The double network was highly viscoelastic and ductile and enabled efficient film stretching or creeping for CNT alignment, which dramatically improved the mechanical strengths of the CNT films. Due to viscous drag from the polymer network, the CNTs showed enhanced movability in reconstructing new networks, which made the film repairable. The repairability resulted from the branched polymeric structure. This double-networking strategy provides a new way to manipulate CNT assemblies for high-performance applications.

    • Xiaohua Zhang
    • , Xin Wang
    •  & Qingwen Li

  • Article
    | Open Access

    Despite enormous efforts by many research groups, Sr2IrO4 was found to stay remarkably insulating in thin film form. Now, a high-pressure oxygen annealing treatment on the Sr2IrO4 thin film realized the long-sought metallicity for the first time. An emerging transport phase diagram was deduced from the experiment that features an interplay between two states: the robust insulating state, which is likely dominated by the defect scattering effect of planar oxygen vacancies O(2), and the new metallic state, which likely reflects an intrinsic bulk-like property of the IrO2 planes with effective electron doping due to apical oxygen vacancies O(1).

    • Zhen Song
    • , You-Shan Zhang
    •  & Rui-Hua He

  • Article
    | Open Access

    This paper introduces OPV, an organic semiconductor material, as a novel photosensitizer to kill intracellular bacteria that are infectious and antibiotic-resistant. It explains how OPV binds to bacterial membranes and produces reactive oxygen species by blue light, guiding photodynamic therapy design. It proves the excellent antibacterial effect of OPV against Porphyromonas gingivalis and MRSA in vitro and in vivo, without damaging normal cells or tissues, indicating good biocompatibility and safety. It also shows that OPV can be excited by dental blue light curing lamps, facilitating clinical applications.

    • Lintian Yuan
    • , Xuancheng Fu
    •  & Yuguang Wang

  • Article
    | Open Access

    Although the electrostatic tuning by three-terminal devices is generally weak for phase transition materials, it can control phases with much hither precision than temperature or pressure. This technique was applied to the scaled-down VO2 metal-insulator transitions, where the material phase is controlled by the gate voltage. The crossover from continuous to binary transition with scaling down was demonstrated, and the critical channel length was given by domain boundary instability. Interestingly, below the critical channel length, the influence of the noncritical stimulus (drain voltage in this case) disappeared because the spatial degree of freedom is lost in the single-domain VO2 channel.

    • Takeaki Yajima
    • , Yusuke Samata
    •  & Akira Toriumi

  • Article
    | Open Access

    The coexistence of ferroelectricity and ferromagnetism has been a traditional challenge for a long time. In this work, we propose a method of transition metal implantation into hybrid perovskites, which realizes the mutual regulation of magnetism and electricity, and obtains an obvious multiferroic magnetic-electric coupling effect. This study provides a new idea for realizing room-temperature magnetoelectric coupling of multiferroic materials employing ion implantation and paves the way for the realization of a new generation of spin-dependent electronic devices.

    • Xiangqian Lu
    • , Renjie Hu
    •  & Wei Qin

  • Article
    | Open Access

    A modular assembly strategy has been demonstrated to construct metal nanoparticles functionalized mesoporous carbon two-dimensional (2D) nanosheets by organizing zero-dimensional (0D) spherical monomicelle modules on the 2D supporting blocks. The resultant materials exhibit an excellent electrocatalytic activity for oxygen reduction reaction, which holds a great potential as a catalyst for fuel cells.

    • Pengpeng Qiu
    • , Xingmiao Zhang
    •  & Dongyuan Zhao

  • Article
    | Open Access

    This work aims to fabricate well-ordered nanonetwork Au through a bottom-up approach using templated electrochemical deposition for enhanced mechanical properties. As evidenced by nanoindentation and micro-compression tests, diamond-structured Au fabricated exhibits high reduced modulus and yield strength above the Hashin-Shtrikman upper bound due to the deliberate structuring and nanosized effects.

    • Suhail K. Siddique
    • , Hassan Sadek
    •  & Rong-Ming Ho

  • Article
    | Open Access

    The use of an identical electrolyte in electrochemical metallization (ECM)-based neuron and synaptic devices has not yet been achieved. We demonstrate ECM devices containing the same ferroelectric PbZr0.52Ti0.48O3 (PZT) electrolyte, which can sustain both neuron and synaptic behavior depending on the active electrode. The Ag/PZT/La0.8Sr0.2MnO3 (LSMO) threshold switching memristor exhibits abrupt and volatile resistive switching characteristics, resulting in neuron devices. In contrast, the Ni/PZT/LSMO memory switching memristor displays gradual, non-volatile resistive switching behavior which leads to synaptic devices. The divergent behavior of the ECM devices is attributed to greater control of cation migration through the ultrathin ferroelectric PZT.

    • Chansoo Yoon
    • , Gwangtaek Oh
    •  & Bae Ho Park

  • Article
    | Open Access

    Topological semimetal HoPtBi exhibits anomalous AMR effect in paramagnetic state. The AMR exhibits a novel transition from a quasi-twofold to fourfold symmetry and finally forms a stable rotated fourfold symmetry as B increases. C2 and C4 signals with phase angle transitions dominate the novel AMR. Anisotropy of magnetic-field tunable effect induces the topological band change and leads to the phase angle transition.

    • Jie Chen
    • , Hang Li
    •  & Wenhong Wang

  • Review Article
    | Open Access

    This review highlights single-aggregate spectroscopy studies of conjugated polymer aggregates based on a combination of solvent vapor annealing and single-molecule fluorescence techniques and draws mesoscopic connections between morphology, electronic coupling, and photophysics in conjugated polymers.

    • Chanwoo Kim
    • , Hyeyoung Joung
    •  & Jaesung Yang

  • Article
    | Open Access

    Infrared-active InAs quantum dots (QDs) were synthesized with zinc coordination complexes for surface passivation, resulting in improved optoelectronic properties. The resulting InAs QDs doped with Zn showed narrowed size distributions, reduced surface defects, and modulation of electronic properties through Zn surface doping. These InAs:Zn QDs exhibited improved electrical properties when integrated into infrared photodiodes.

    • Seongchan Kim
    • , Sooyeon Yeon
    •  & Nuri Oh

  • Article
    | Open Access

    We developed a novel surface engineering technique using electrospinning and hydrothermal processes to create a flexible, binder-free electrode composed of Ti3C2Tx MXene/carbon nanofibers (MCNFs) coated with amorphous RuOx. The MXene served as a template for the growth of amorphous and disordered state RuOx that positively impacted electrochemical performance. The combination of RuOx and MXene resulted in an enhanced pseudocapacitive reaction, resulting in a supercapacitor with a record-high energy density of 8.5 Wh kg–1 at 85.8 W kg–1, as well as excellent flexibility.

    • Hyewon Hwang
    • , Sungeun Yang
    •  & Dongju Lee

  • Article
    | Open Access

    Silica-polymer hybrids are promising materials for bone repair. Here, biodegradable, tough and porous silica-polyurethane hybrid scaffold was successfully fabricated. Polyurethane is a versatile polymer that can be designed to have desired properties. Polymerization and alkoxysilane functionalization under high-temperature formed polyurethanes with high molecular weight, which enabled rapid gelation during the sol-gel process. This allowed porous hybrid scaffold fabrication through the facile salt-leaching method. The hybrid scaffold had self-healing properties which can self-fit into irregular bone defects. Furthermore, silicate ion release from the hybrid scaffold induced angiogenesis and osteogenic differentiation, while the porous structure suppressed chronic inflammation.

    • Su Jeong Park
    • , Seung Hyuk Im
    •  & Justin J. Chung

  • Review Article
    | Open Access

    Inverted perovskite solar cells (PSCs) with a p-i-n architecture are being actively researched due to their concurrent good stability and decent efficiency. In particular, the power conversion efficiency (PCE) of inverted PSCs has seen clear improvement in recent years and is now almost approaching that of n-i-p PSCs. Here, we systematically review recent progress in the development of high-efficiency inverted PSCs, and highlight the development of charge transport materials and the effects of defect passivation strategies on the performance of inverted PSCs, with the aim of providing constructive suggestions for the future development of inverted PSCs.

    • Sanwan Liu
    • , Vasudevan P. Biju
    •  & Zonghao Liu

  • Article
    | Open Access

    2D Ni/ITQ-2-co material prepared by ligand-chelating impregnation approach shows outstanding activity and stability in the conversion of bio-derived triglycerides (TGs) or free fatty acids (FFAs) to diesel range alkanes, beneficially from the highly dispersive Ni nanoclusters and immobilization effect of 2D zeolite.

    • Hao Pang
    • , Guoju Yang
    •  & Jihong Yu

  • Review Article
    | Open Access

    Due to their unique physical characteristics, surfactants containing fluorocarbon chains form hierarchical patterns of two-dimensional mesoscopic/microscopic self-assemblies on the surface of water. This review describes the overarching physical mechanism, the competitive interplay of line tension and dipole interaction and discusses several key experimental and analytical techniques characterizing the shape, size, correlation, and viscoelasticity of mesoscopic/microscopic self-assemblies on water, which is often non-trivial. Some of the recent biomedical applications, including biomimetic surface coating, contrast agents in multimodal imaging, and controlled delivery, are introduced to highlight how the unique physicochemical properties of fluorinated self-assemblies can be applied in materials science.

    • Motomu Tanaka
    • , Marie Pierre Krafft
    •  & Andreea Pasc

  • Review Article
    | Open Access

    This review highlights the recent advances in the bioapplications of higher-order DNA origami structures at multiple scales. After a brief introduction to the development of DNA origami, we describe the use of DNA origami structures to assist in single-molecule studies, manipulate lipid membranes, direct cell behaviors, and deliver drugs as smart nanocarriers. Our opinions on the current challenges and future directions are also shared.

    • Yihao Zhou
    • , Jinyi Dong
    •  & Qiangbin Wang

  • Article
    | Open Access

    Owing to both solid- and liquid-like nature, gels are unique smart materials with several potential applications. However, most gels are inherently susceptible to harsh environments. Inspired by the “tun forming mechanism” of tardigrades, we proposed a simple two-step process to fabricate extremotolerant glycerogels with extremoprotected polymer-glycerol networks, which can survive from −50 to 80 °C for prolonged periods. The method is applicable to various types of polymers and crosslinkers and can be integrated with various functional materials to realize glycerogels with wide-ranging functionalities and properties. Therefore, this method dramatically enhances the selection of gels for bio, electrical/electronic, and soft robotics applications.

    • Md. Tariful Islam Mredha
    • , Yoonseong Lee
    •  & Insu Jeon

  • Article
    | Open Access

    A core/shell structured hybrid film comprised of N-doped carbon covering on single-wall carbon nanotubes (SWCNTs) were synthesized by a rapid electropolymerization method, which not only contains abundant exposed pyridinic N that leads to excellent catalytic activity for both ORR and OER, but also perfectly inherits the high conductivity, excellent flexibility, and porous structure of original SWCNT film, making it a desirable integrated oxygen electrode for Zn-air batteries.

    • Yu Meng
    • , Yi-Ming Zhao
    •  & Hui-Ming Cheng

  • Article
    | Open Access

    A freestanding three-dimensional graphdiyne-hollowed FeCoNi Prussian blue analog electrode (h-FeCoNi PBA@GDY) with highly selective and active interfaces was synthesized by in situ growth of GDY layer on the surface of h-FeCoNi PBA for electrocatalytic nitrate reduction reaction (ECNtRR) at ambient temperatures and pressures. Experimental results demonstrate the presence of the unique incomplete charge transfer between metal atoms and GDY can effectively enhance the intrinsic activity and the ability to increase the active sites of the electrocatalyst, promote fast redox switching, and high-density charge transport at the interface resulting in high reaction selectivity, activity and stability for ammonia production.

    • Yaqi Gao
    • , Huimin Liu
    •  & Yuliang Li

  • Review Article
    | Open Access

    The exquisite structures of biological ion channels provide inspiration for designing and constructing artificial ion channels to achieve analogous functions. Hierarchically engineered heterogeneous nanochannels with excellent ion rectification, selectivity, and gating properties have attracted more and more attention. In this review, we briefly review the recent advances of hierarchically engineered nanochannel systems in terms of pore-on-pore and pore-in-pore structures, with an emphasis on the promising applications, including ion-selective transport, osmotic energy harvesting, separation, and biosensing.

    • Minmin Li
    • , Yuchen Cao
    •  & Guangyan Qing

  • Article
    | Open Access

    Microstructures in organisms are often in quasiordered distribution, which brings specific functions and performance stability. Here, a numerical model was built to demonstrate the structural whiteness caused by the quasiordered state of the tubular architectures in Morpho theseus wing scales. The method is beneficial to tailored disorder in periodic structures to achieve better properties.

    • Xinkun Zhao
    • , Yuqin Xiong
    •  & Di Zhang

  • Article
    | Open Access

    In this work, we developed a novel fabrication strategy to construct elastic carbon framework electrocatalysts using nanocellulose fibers (CNFs) and carbon nanotubes (CNTs) by directional freeze casting and interfacial assembly to prepare self-supporting flexible air electrodes. The obtained carbon framework has a directional porous structure, and N and S heteroatoms are uniformly doped in the carbon skeleton, showing excellent mechanical flexibility and excellent ORR performance. Moreover, we assembled an all-solid-state flexible zinc-air battery (FZAB), offering a smaller charge/discharge voltage gap and excellent cycling stability. These results demonstrate the potential of flexible carbon frameworks for the utilization and modification of flexible energy storage devices.

    • Huaipeng Pang
    • , Meng Wang
    •  & Biao Kong

  • Article
    | Open Access

    A high-performance bacterial cellulose/carbon nanotubes conductive fiber is developed through the in-situ biosynthesis. Through mimicking the structure of muscle fascicles, the composite fiber integrates high strength, high stiffness, high fatigue resistance, and stable electrical performance into one material. Based on those excellent properties, the muscle-inspired fiber is competitive to play a key role in the fields of intelligent fiber-based composites and devices.

    • Zhang-Chi Ling
    • , Huai-Bin Yang
    •  & Shu-Hong Yu

  • Article
    | Open Access

    MOFs uniquely combine metal-atom centers and developed organic-based structures. Both features are attractive for catalysis. However, their isolating nature prevents them from effective use in electrocatalysis processes. Modifying the chemical structure to gain electric conductivity often harms its natural advantages. In this study, Borenstein et al. present a new approach to overcoming the non-conductivity of MOF b growing MOF nanoparticles in a conductive carbon host. The host’s porosity controls the MOF nanoparticles’ size and their electric properties while preserving their structure. As a result, the composition efficiently electro-catalyzes carbon dioxide into formic acid at low overpotentials.

    • Krishnamoorthy Sathiyan
    • , Asmita Dutta
    •  & Arie Borenstein

  • Article
    | Open Access

    Gyroid-structured nanoporous chitosan is successfully fabricated by templated crosslinking reaction using nanoporous polymer as a template. A multiple pore-filling process is developed for templated synthesis to give well-ordered nanoporous chitosan. Bio-mimicking from the structural coloration of butterfly wing structure, the nanoporous chitosan with gyroid texture is highly appealing in the application of high reflective materials for UV optical devices.

    • Tze-Chung Lin
    • , Chih-Ying Yang
    •  & Rong-Ming Ho

  • Review Article
    | Open Access

    Nanoarchitectonics concept is essential to bridge the gaps between biology and materials chemistry. Based on this fundamental principle, this review article provides pore-engineered nanoarchitectonics for cancer therapy by integrating basic descriptions and exemplifying therapy applications. This review paper briefly summarizes pore-engineered nanoarchitectonics basics according to classification based on material porosity and composition. We discuss how to design mesoporous material and highlight the appealing points of the progress in the clinical translation of mesoporous materials for cancer treatment. Nanoarchitectonics could be an important key concept for future advanced life technologies as well as currently required cancer therapy.

    • Linawati Sutrisno
    •  & Katsuhiko Ariga

  • Article
    | Open Access

    In this work, a photodynamic therapy system based on conjugated polymers (CPs) is developed to inhibit the infection of RNA viruses. Three cationic CPs with different backbone structures fluorene-co-phenylene (PFP), thiophene (PMNT), and phenylene vinylene (PPV) exhibit different photoinactivation effects. PPV and PMNT cause effective inactivation of viruses under light irradiation, while SARS-CoV-2 pseudotyped viruses keep infectious after treated by PFP, which is determined by the interactions between CPs with the proteins and gene of viruses. This work preliminarily reveals the effect of CP-virus interactions on their photoinactivation activity and would be beneficial to develop high-efficient antiviral PDT agents.

    • Ruilian Qi
    • , Fengting Lv
    •  & Shu Wang

  • Article
    | Open Access

    High-order 3D nanotube arrays (NTAs) arranged from mesoporous 2D N, B, P co-doped carbon network (NBP-CNW) were synthesize by a facile, well-controllable, eco-friendly and sustainable strategy using task-specific ionic liquids as precursors. NBP-CNW-NTAs modified flexible microelectrode was embed in microfluidic electrochemical biosensor chip for real-time tracking H2O2 secreted from different cancer cells (i.e., breast cancer cells, hepatoma cells and cervical cancer cells) with or without radiotherapy treatment. Furthermore, the functional microelectrode has been integrated into an implantable probe for in situ minimally invasive detection of surgically resected human breast specimens to identify the tumor tissues from the normal one.

    • Yimin Sun
    • , Xulin Dong
    •  & Fei Xiao

  • Article
    | Open Access

    Developing a new technique/method and/or mechanism for separating ionic charges is critical to the fabrication of a high-performance nanogenerator. Here, we demonstrate that the magnetic force can be used to drive the movement and separation of charges within metal nanoparticles film when these nanoparticles are functionalize with charged magnetic ligands. Placing the magnetic field induces the gradient distribution of magnetic counterions which subsequently transforms into the electric potential and outputs electrical energy.

    • Jingyu Wang
    • , Tao Xiao
    •  & Yong Yan

  • Article
    | Open Access

    Although van der Waals (vdW) antiferromagnets are expected to reveal spin-based functional properties, the feasibility of spintronic applications at room temperature is limited owing to the lack of suitable materials. Here we use torque magnetometry and a uniaxial spin model to understand the room-temperature magnetic anisotropy of the vdW antiferromagnet, Co-doped Fe5GeTe2. We visualized detailed spin configurations using the spin model and demonstrated that the spin states are directly related to magnetic phases characterized by progressive reversal of the angle-dependent torque across spin-flop transition. The flexibility of the anisotropic spin Hamiltonian approach has broad applicability to other antiferromagnetic materials.

    • Hyun Jun Shin
    • , Jin Seok Kim
    •  & Young Jai Choi

  • Review Article
    | Open Access

    The recent advances realized in the syntheses and characterizations of both morphological- and molecular-level one-dimensional (1D) metal-halide perovskites with tunable structures, compositions, and properties, as well as optoelectronic applications are comprehensively reviewed. Furthermore, the challenges, prospects, and promising research directions are discussed, which we believe will help to accelerate the explorations of 1D metal-halide perovskites in the future.

    • Dawei Duan
    • , Chuangye Ge
    •  & Tom Wu

  • Article
    | Open Access

    We developed ultralong nanobelts comprising hydrated Na-intercalated oxygen-deficient potassium manganese oxide (H-Na-D-KMO), in which the Na+ ions were preintercalated and synchronously induced generation of oxygen vacancies. Results showed that the introduction of Na+ ions provided more paths to facilitate Mg2+ migration and induced more strain to create more active sites and the formation of oxygen vacancies improved the electrical properties. Consequently, the Mg-ion supercapacitors assembled with H-Na-D-KMO exhibited an unprecedented ultrahigh energy density of 108.4 Wh kg–1 at 1100 W kg–1 and good mechanical flexibility.

    • Shude Liu
    • , Ling Kang
    •  & Yusuke Yamauchi

  • Article
    | Open Access

    A hybrid surface electrode array was developed, which exhibits superior signal-to-noise ratio (SNR) and outstanding conformality with the cortex surface. It was used to detect the brain signals in awake, free-moving rat models with high-throughput spatiotemporal resolution. In addition, the pilocarpine-induced epileptic discharges and behavior were considerably suppressed upon the usage of this electrode-array system. These findings pave the way for the integration of graphene into bio-medical device platforms, and their use in cranial neuropathy treatment.

    • Jeongsik Lim
    • , Sangwon Lee
    •  & Jong-Hyun Ahn

  • Article
    | Open Access

    Superconducting (SC) gap of elemental yttrium under extreme pressure conditions was directly probed via the point-contact spectroscopy (PCS) in a diamond anvil cell. Strong enhancement in the differential conductance near the zero-biased voltage is observed owing to Andreev reflection, a hallmark of superconductivity. Taken together with the large initial slope of the upper critical field, the large SC gap-to-Tc ratio suggests that Y belongs to a family of the strongly coupled BCS superconductors.

    • Zi-Yu Cao
    • , Harim Jang
    •  & Tuson Park

  • Article
    | Open Access

    Natural/synthetic hybrid double-network (DN) hydrogels with hierarchical anisotropy and high toughness characteristics are prepared by directly using a squid mantle as an anisotropic soft bioproduct for the primary network and polyacrylamide (PAAm) as a synthetic polymer for the secondary network. The obtained squid/PAAm DN gel maintains the complex orientation of the muscle fibers of the squid mantle and exhibits anisotropic, enhanced mechanical properties and excellent fracture resistance due to its unique composite structure. This hybrid strategy provides a general method for preparing hydrogels with elaborated anisotropy and determining functions derived from the anisotropy.

    • Shou Ohmura
    • , Tasuku Nakajima
    •  & Jian Ping Gong

  • Article
    | Open Access

    We optimized the RL-QN15 peptide to obtain the cyclic heptapeptide (CyRL-QN15) with excellent therapeutic potency against skin wounds. Then, a multifunctional HPDAlCyRL-QN15/ZA hydrogel was prepared and characterized, which significantly enhanced the pro-healing potency of CyRL-QN15. This non-toxic hydrogel accelerated the proliferation, migration, and tube formation of skin cells, regulated the secretion of cytokines, directly scavenged free radicals, and decreased reactive oxygen species. Moreover, the HPDAlCyRL-QN15/ZA hydrogel accelerated the healing of skin wounds in type 2 diabetic mice and diabetic patient skin cultured ex vivo by promoting the polarization of macrophages to reduce inflammation, re-epithelialization, deposition of collagen, and angiogenesis.

    • Zhe Fu
    • , Huiling Sun
    •  & Xinwang Yang

  • Article
    | Open Access

    Natural polyphenols reduce metal ions into metal nanoclusters in water followed by subsequent self-assembly into metal-ornamented polyphenol supramolecular (MOPS) assemblies. MOPS assemblies, which integrate the merits of both the natural polyphenols and metal nanoclusters, possess excellent solubility, stability, and free radical scavenging capacity in aqueous solutions and enable further functional material engineering via polyphenol chemistry.

    • Qiong Dai
    • , Tong Shu
    •  & Xueji Zhang

  • Article
    | Open Access

    A new type of solid-sate colossal barocaloric material was fabricated by exploiting the amorphous high entropy inherited from huge disorder of liquid phase in solidified PEG(HO(CH2CH2O)nH) by introducing 5 wt.% PET((C10H8O4)m) for copolymerization. Although PEG loses –OH end mobility, high entropy still retains in amorphous solid. Consequently, a colossal barocaloric entropy change as high as ΔSp ∼ 416 J·kg−1·K−1 under a low pressure of 0.1 GPa was demonstrated.

    • Zibing Yu
    • , Houbo Zhou
    •  & Baogen Shen

  • Article
    | Open Access

    Dual-responsive disassembly of core-shell nanoplatform (Au@MPN) is reported with self-supplied H2O2 and autocatalytic Fenton reaction for enhanced chemodynamic therapy. Both ATP and low pH can disassemble the Au@MPN to release Fe(III), which can then be reduced into Fe(II) by the simultaneously released tannic acid. In particular, the exposed gold nanoparticles can catalyze the oxidation of intracellular glucose to produce H2O2. Subsequently, Fe(II) and the self-supplied H2O2 induce an efficient Fenton reaction for chemodynamic therapy by generating hydroxyl radicals. Additionally, tumor growth and melanoma metastatic lung cancer can be effectively suppressed by Au@MPN.

    • Mengran Peng
    • , Enguo Ju
    •  & Mingqiang Li

  • Article
    | Open Access

    Tuning of the oscillations within a single nanodevice is a vital factor for harnessing them to neuromorphic computing. Herein, tuning of the oscillation properties of spin structures within a single permalloy circular disk achieved by manipulating the dimensionality of spin structures is directly observed by the time-resolved X-ray microscopy.

    • Hee-Sung Han
    • , Sooseok Lee
    •  & Ki‐Suk Lee

  • Article
    | Open Access

    In this work, the formation of DNA supramolecular hydrogels was controlled by tuning rigidity of building blocks. The strand displacement reaction was used to in situ tuning the rigidity of the molecular network of the DNA supramolecular hydrogel. Our experiments revealed that the rigidity plays an important role in the formation and mechanical properties of hydrogels.

    • Yufan Pan
    • , Bo Yang
    •  & Dongsheng Liu

  • Article
    | Open Access

    The wafer-scale homogeneous growth of WS2xSe2(1-x) monolayer alloys with full-range composition and bandgap modulation is demonstrated using metal–organic chemical vapor deposition. In these 2D TMD alloys, the bowing effect is substantially alleviated, enabling systematic bandgap modulation with the linear relationship between optical bandgap and alloying composition.

    • Hee Seong Kang
    • , Jung Hoon Kang
    •  & Chul-Ho Lee

  • Article
    | Open Access

    We developed all-solution-processed broadband photodetectors based on the wafer-scale perovskite quantum dots (PQDs)/MoS2 through light management via the monochromatization effect of the PQDs. The rational nanohybrid-based photodetectors exhibited broadband photodetection behavior that retained high photocurrents over a wide spectral range and also show superb air stability and exceptional bending durability.

    • Minji Kim
    • , Garam Bae
    •  & Sun Sook Lee

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