Novel nitrogen-doped carbon dots with triple targetability as a fluorescent probe for bioimaging of living cells.

Investigating the interactions between various organelles can effectively reveal the corresponding biological problems. Currently, studies of organelle interactions typically employ multiple fluorescent probes that can concurrently target different organelles. However, the simultaneous use of multiple probes is complicated to operate, and the probes can interact with each other, affecting the imaging results.

Biodegradable origami enables closed-loop sustainable robotic systems.

Robots are increasingly integral across various sectors due to their efficiency and superior capabilities, which enable performance beyond human potential. However, the development of robotic systems often conflicts with the sustainable development goals set by the United Nations, as they generate considerable nondegradable waste and organic/inorganic pollutants throughout their life cycle. In this paper, we introduce a dual closed-loop robotic system that integrates biodegradable, sustainable materials such as plasticized cellulose films and NaCl-infused ionic conductive gelatin organogels.

Cr(VI)-Responsive Ink with Four-Dimensional Printing of an Ultracompact Hydrogel Optical Fiber Microsensor.

Hydrogel is emerging as a promising material for smart sensors due to its remarkable stimuli-responsiveness and biocompatibility. However, traditional methods like ultraviolet curing or imprinting could not yield ultracompact hydrogel microstructures with sophisticated design and controllable morphology, posing challenges in developing highly integrated microfluidic sensors. With the advanced femtosecond laser (Fs) direct writing technology, an intelligent hydrogel optical microsensor is prepared for real-time monitoring of trace hexavalent chromium ions [Cr(VI)] in water.

Tuning Absorption State and Intermolecular Potential of Organic Semiconductors for Narrowband Ultraviolet Photodetection.

Narrowband response of organic semiconductors determines the band selectivity and anti-interference of the organic photodetectors, which are pursued for a long time but have not yet been resolved in the UV band. Herein, a feasible strategy is developed to realize narrowband UV response by tuning the absorption state and intermolecular potential of organic semiconductors. The as-designed non-Donor-Acceptor molecule, 2,5-diphenylthieno[3,2-b]thiophene (2,5-DPTT), exhibits narrowband absorption by fully suppressing the charge transfer state absorption.

Spontaneous symmetry and antisymmetry breaking of two-component solitons in a combination of linear and nonlinear double-well potentials.

We investigate the phenomenology of spontaneous symmetry breaking (SSB) and spontaneous antisymmetry breaking (SASB) in the framework of a system of coupled nonlinear Schrödinger equations (NLSEs) with a combination of linear and nonlinear double-well potentials (DWPs), including self- and cross-phase-modulation (SPM and XPM) nonlinear terms. The DWP structure is represented by a symmetric pair of delta functions. This setup can be realized in optics and for matter waves in Bose-Einstein condensates.

Excitation of electromagnetic rogue waves in magnetized plasmas.

Rogue waves, presented in numerous fields of science, are attracting significant attention. We study the excitation of electromagnetic rogue waves in magnetized plasmas caused by the thermal electron anisotropic loss cone distribution. The Krylov-Bogoliubov-Mitropolsky method is used to derive the nonlinear Schrödinger equation (NLSE) from collisionless magnetohydrodynamics equations satisfied by electrons.

Microscale insight into the proton concentration during electrolytic reaction via an optical microfiber: potential for microcurrent monitoring by a dielectric probe.

Local microcurrent monitoring is of great significance for biological and battery systems, yet it poses a formidable challenge. The current measurement techniques rely on electromagnetic materials which inevitably introduce interference to the system under examination. To address this issue, a promising approach based on a dielectric fiber-optic sensor is demonstrated.

Near-Threshold Dipole Strength in ^{10}Be with Isoscalar Character.

Isoscalar dipole transitions are a distinctive fingerprint of cluster structures. A 1^{-} resonance at 7.27(10) MeV, located just below the α-emission threshold, has been observed in the deuteron inelastic scattering reactions off ^{10}Be.

Spin Correlations in the Parent Phase of Li_{1-x}Fe_{x}ODFeSe.

Elucidating spin correlations in the parent compounds of high-temperature superconductors is crucial for understanding superconductivity. We used neutron scattering to study spin correlations in Li_{1-x}Fe_{x}ODFeSe, an insulating material with reduced electron carriers compared to its superconducting counterpart (T_{c}=41  K), serving as the undoped parent compound. Our findings show a reduced total fluctuating moment in this insulator relative to FeSe and 122 iron pnictides, likely due to increased interlayer distances from intercalation, which enhance fluctuations and reduce the intensity of spin excitations.

Illuminating the Future: Sunlight-Powered Catalysis Unlocks Next-Generation Li-O Battery Performance.

Lithium-oxygen (Li-O) batteries have an extremely high theoretical specific energy but are hindered by the sluggish kinetics of the oxygen evolution reaction (OER). Visible-light-assisted photocatalysts can accelerate OER kinetics. However, the photoinvolved electrochemical process at the oxygen cathode remains insufficiently understood, and the interlaboratory results are not comparable and reproducible.

Unifying Electrochemically-Driven Multistep Phase Transformations of Rutile TiO to Rocksalt Nanograins for Reversible Li and Na Storage.

Rutile titanium dioxide (TiO(R)) lacks octahedral vacancies, which is not suitable for Li and Na intercalation via reversible two-phase transformations, but it displays promising electrochemical properties. The origins of these electrochemical performances remain largely unclear. Herein, the Li and Na storage mechanisms of TiO(R) with grain sizes ranging from 10 to 100 nm are systematically investigated.

Trajectories of a magnetic sphere in a shaken three-dimensional granular bed under low gravity.

This present investigation employs an advanced magnetic particle tracking method to trace the trajectories of an intruder within a vibration-driven granular medium under artificial low-gravity conditions. The experiments are carried out within the centrifuge of the Chinese Space Station, encompassing six distinct low-gravity environments. Trajectories under various vibration modes are captured and analysed for each gravity level.

Cooperative mechanisms of oxide ion conduction in tellurites with secondary bond interactions and Grotthuss-like processes.

Oxide-ion conducting materials are gaining considerable attention in various applications ranging from oxide fuel cells to oxygen permeation membranes. The oxide ion migration mechanisms are the basis for designing oxide-ion conducting materials. Here, enlightened by proton diffusion in hydrogen-bond networks, we report the coordination polyhedra cooperative mechanism with similar Grotthuss process of oxide ion migration in tellurites.

Investigation of Trion Emission in CdSe/CdSeS Core/Crown Nanoplatelets.

Quasi-two-dimensional CdSe nanoplatelets (NPLs) exhibit promising potential for optoelectronic device applications due to their unique optical properties, particularly trion emission. However, the origin of the trion emission in CdSe NPLs remains unclear. In this study, the steady-state optical properties of CdSe NPLs with different CdSeS crown widths have been investigated.

Multimodal Cross Global Learnable Attention Network for MR images denoising with arbitrary modal missing.

Magnetic Resonance Imaging (MRI) generates medical images of multiple sequences, i.e., multimodal, from different contrasts.

Cyclometalated Iridium(III) Schiff Base Complexes for Chemiluminogenic Bioprobes.

Chemiluminogenic bioimaging has emerged as a promising paradigm due to its independence from light excitation, thereby circumventing challenges related to light penetration depth and background autofluorescence. However, the availability of effective chemiluminophores remains limited, which substantially impedes their bio-applications. Herein, we discovered for the first time that cyclometalated iridium(III) Schiff base complexes can unexpectedly generate chemiluminescence.

UNET-FLIM: A Deep Learning-Based Lifetime Determination Method Facilitating Real-Time Monitoring of Rapid Lysosomal pH Variations in Living Cells.

Lifetime determination plays a crucial role in fluorescence lifetime imaging microscopy (FLIM). We introduce UNET-FLIM, a deep learning architecture based on a one-dimensional U-net, specifically designed for lifetime determination. UNET-FLIM focuses on handling low photon count data with high background noise levels, which are commonly encountered in fast FLIM applications.

Multivalent-effect immobilization of reduced-dimensional perovskites for efficient and spectrally stable deep-blue light-emitting diodes.

Despite substantial advances in green and red metal halide perovskite light-emitting diodes (PeLEDs), blue PeLEDs, particularly deep-blue ones (defined as Commission International de l'Eclairage y coordinate (CIE) less than 0.06) that meet the latest Rec. 2020 colour gamut standard, lag dramatically behind owing to a severe phase segregation-induced electroluminescent spectral shift and low exciton utilization in broadened bandgap perovskite emitters.

Amorphous PdRuO as High-Activity Sensitizers for Ultrafast Low-Humidity Sensors.

Amorphous noble metals often display excellent sensitization due to their unsaturated atomic coordination and abundant active sites on the surface. In this work, amorphous palladium-ruthenium bimetallic nanoparticles were successfully prepared by lithium doping and incorporated into MOF-303 by using a confinement strategy. Compared with crystalline c-PdRuO@MOF-303, the low-humidity sensor constructed with amorphous a-PdRuO@MOF-303 exhibits higher response values (3600 Hz to 3.

The effect of carrier concentration on the electronic structure and magnetothermal properties of a two-dimensional VTe monolayer with a high Curie temperature.

Two-dimensional (2D) magnetic transition metal dichalcogenides have unique electronic properties, ferromagnetism, and tunable properties in low-dimensional systems. In this paper, the structural, electronic, and magnetic properties of the VTe monolayer under different carrier concentrations were investigated using first-principles calculations and Monte Carlo (MC) simulations. It is found that by introducing a suitable number of electrons, the VTe monolayer can undergo a transition from a semiconductor to a half-metal state, with 100% spin polarization.

Multicolor Emission in Indium-Doped Amorphous Boron Nitride Integrated on Silicon for Self-Biased and High-Speed Photodetection.

Boron nitride (BN), as an emergent wide-bandgap material, is gaining considerable attention as a solid-state deep ultraviolet source and quantum emitter from the ultraviolet to the near-infrared spectral ranges. However, studies of the defect structure of BN and efforts at scalable BN emitters in photonic devices are limited. Controlling the BN doping is of particular interest in view of the light emission of defects.

Based on Silicon-Gel Polymer Electrolyte Dielectric of Low Impedance Tribovoltaic Nanogenerator.

As an innovative renewable energy harvester, the tribovoltaic nanogenerator (TVNG) with lower impedance and DC characteristics has attracted much attention. To alleviate the issues of severe wear for hard-hard semiconductor materials, here, a soft ion dielectric material and semiconductor TVNG based on n-Si/gel polymer electrolyte (GPE) (GPE-TVNG) is proposed. A solid ionic electric double layer (i-EDL) model is established to systematically explore the generation mechanism as well.

Abnormal Blueshift of Mn d-d Emission Unlocked by Decreasing Phonon Coupling under High Pressure.

Mn d-d emission has been a star transition-metal activated phosphors that were extensively used in optoelectronic devices. However, due to the complex and elusive luminescence mechanism, the full potential of this material remains largely untapped. Here, we designed a core-shell structure of MnS@CdS quantum dots (QDs) to investigate the effect of the internal strain on the Mn emission.

Nucleic acid therapeutics: Past, present, and future.

Nucleic acid therapeutics have become increasingly recognized in recent years for their capability to target both coding and non-coding sequences. Several types of nucleic acid modalities, including siRNA, mRNA, aptamer, along with antisense oligo, have been approved by regulatory bodies for therapeutic use. The field of nucleic acid therapeutics has been brought to the forefront by the rapid development of vaccines against COVID-19, followed by a number of approvals for clinical use including much anticipated CRISPR-Cas9.

Microscopic Response Mechanism of Epsilon-Negative and Epsilon-Near-Zero Metacomposites.

Metals have traditionally served as the primary functional phase in the development of metamaterials exhibiting epsilon-near-zero (ENZ) and epsilon-negative (EN) responses, albeit with persisting ambiguities regarding their response mechanisms. This paper presents the tunable ENZ (' ~ 0) and EN (' < 0) parameters at the 20-MHz to 1-GHz region based on Cu/CaCuTiO (Cu/CCTO) metacomposites. By means of first-principles calculations and multi-physics simulations, the underlying mechanisms governing ENZ and EN responses are unveiled.