Intrinsically stretchable fully π-conjugated polymers with inter-aggregate capillary interaction for deep-blue flexible inkjet-printed light-emitting diodes.

Fully π-conjugated polymers consisting of plane and rigid aromatic units present a fantastic optoelectronic property, a promising candidate for printed and flexible optoelectronic devices. However, obtaining high-performance conjugated polymers with an excellent intrinsically flexible and printable capacity is a great challenge due to their inherent coffee-ring effect and brittle properties. Here, we report an asymmetric substitution strategy to improve the printable and stretchable properties of deep-blue light-emitting conjugated polymers with a strong inter-aggregate capillary interaction for flexible printed polymer light-emitting diodes.

NIR-II-excited off-on-off fluorescent nanoprobes for sensitive molecular imaging in vivo.

Strong background interference signals from normal tissues have significantly compromised the sensitive fluorescence imaging of early disease tissues with exogenous probes in vivo, particularly for sensitive fluorescence imaging of early liver disease due to the liver's significant uptake and accumulation of exogenous nanoprobes, coupled with high tissue autofluorescence and deep tissue depth. As a proof-of-concept study, we herein report a near-infrared-II (NIR-II, 1.0-1.

Excitation-mode-selective emission through multiexcitonic states in a double perovskite single crystal.

Low-dimensional lead-free metal halide perovskites are highly attractive for cutting-edge optoelectronic applications. Herein, we report a class of scandium-based double perovskite crystals comprising antimony dopants that can generate multiexcitonic emissions in the ultraviolet, blue, and yellow spectral regions. Owing to the zero-dimensional nature of the crystal lattice that minimizes energy crosstalk, different excitonic states in the crystals can be selectively excited by ultraviolet light, X-ray irradiation, and mechanical action, enabling dynamic control of steady/transient-state spectral features by modulating the excitation modes.

Generation of Multiple-Depth 3D Computer-Generated Holograms from 2D-Image-Datasets Trained CNN.

Generating computer-generated holograms (CGHs) for 3D scenes by learning-based methods can reconstruct arbitrary 3D scenes with higher quality and faster speed. However, the homogenization and difficulty of obtaining 3D high-resolution datasets seriously limit the generalization ability of the model. A novel approach is proposed to train 3D encoding models based on convolutional neural networks (CNNs) using 2D image datasets.

Adaptive deep feature representation learning for cross-subject EEG decoding.

Background: The collection of substantial amounts of electroencephalogram (EEG) data is typically time-consuming and labor-intensive, which adversely impacts the development of decoding models with strong generalizability, particularly when the available data is limited. Utilizing sufficient EEG data from other subjects to aid in modeling the target subject presents a potential solution, commonly referred to as domain adaptation. Most current domain adaptation techniques for EEG decoding primarily focus on learning shared feature representations through domain alignment strategies.

Light People: Prof. Henry Snaith's (FRS) perovskite optoelectronics journey.

In 2012, Prof. Henry Snaith demonstrated the first solid-state perovskite solar cell (PSC) with an efficiency of 10.9%, igniting a surge of interest and research into perovskite materials for their potential to revolutionize the photovoltaic (PV) industry.

A Mitochondria-Targeted Iridium(iii) Phosphorescent Probe for Selective Detection of Hypochlorite in Living Cells.

Hypochlorous acid(HClO)/hypochlorite ion (ClO) is a highly reactive oxygen species (ROS) that play a crucial role in various biological processes. In this paper, a "turn-on" phosphorescent probe (Ir-TPP) for detecting ClO in mitochondria was designed and synthesized. In solution, Ir-TPP is minimal emission due to rapid isomerization of C=N-OH as an efficient non-radiative decay process.

High-Performance Circular Polarization Multiple-Resonance TADF Molecules with Enhanced Long-Range Charge Transfer Based on Chiral Paracyclophane.

Circularly polarized multiple-resonance thermally activated delayed fluorescence (CP-MR-TADF) materials have received widespread attention in recent years, but it remains a formidable challenge to design high-performance CP-MR-TADF emitters concurrently exhibiting high quantum efficiency, narrowband emission, and high dissymmetry factor (). Here, we perform an in-depth theoretical investigation on the CP-MR-TADF materials based on [2.2] paracyclophane (pCp) derivatives.

Unveiling the Mystery of Precision Catalysis: Dual-Atom Catalysts Stealing the Spotlight.

In the era of atomic manufacturing, the precise manipulation of atomic structures to engineer highly active catalytic sites has become a central focus in catalysis research. Dual-atom catalysts (DACs) have garnered significant attention for their superior activity, selectivity, and stability compared to single-atom catalysts (SACs). However, a comprehensive review that integrates geometric and electronic factors influencing DAC performance remains limited.

Multi-label speech feature selection for Parkinson's Disease subtype recognition using graph model.

Parkinson's Disease (PD) is the second-most common neurodegenerative disorder. There is a certain pathological connection between PD and dysphonia. Speech signals have been successfully used to identify PD and predict its severity.

Reconfigurable Phototransistors Driven by Gate-Dependent Carrier Modulation in WSe/TaNiSe van der Waals Heterojunctions.

Reconfigurable field-effect transistors (RFETs) offer notable benefits on electronic and optoelectronic logic circuits, surpassing the integration, flexibility, and cost-efficiency of conventional complementary metal-oxide semiconductor transistors. The low on/off current ratio of these transistors remains a considerable impediment in the practical application of RFETs. To overcome these limitations, a van der Waals heterojunction (vdWH) transistor composed of WSe/TaNiSe has been proposed.

Recent Advances on Integrating Porous Nanomaterials with Chemiluminescence Assays.

Advanced porous nanomaterials have recently been the subject of considerable interest due to their high surface areas, tunable pore structures, high porosity, and ease of modification. In the chemiluminescence (CL) domain, the incorporation of additional pores into nanostructures not only enhances the loading capacity for signal amplification but also allows the confinement effect in a nanoscale microreactor and the controlled release of reaction agents. In light of this, increasing efforts have been made to fabricate various porous nanomaterials and explore their potential applications in CL assays.

Intravascular Ultrasound Image-Based Finite Element Modeling Approach for Quantifying In Vivo Mechanical Properties of Human Coronary Artery.

Quantifying the mechanical properties of coronary arterial walls could provide meaningful information for the diagnosis, management, and treatment of coronary artery diseases. Since patient-specific coronary samples are not available for patients requiring continuous monitoring, direct experimental testing of vessel material properties becomes impossible. Current coronary models typically use material parameters from available literature, leading to significant mechanical stress/strain calculation errors.

AI-driven approaches for automatic detection of sleep apnea/hypopnea based on human physiological signals: a review.

Sleep apnea/hypopnea is a sleep disorder characterized by repeated pauses in breathing which could induce a series of health problems such as cardiovascular disease (CVD) and even sudden death. Polysomnography (PSG) is the most common way to diagnose sleep apnea/hypopnea. Considering that PSG data acquisition is complex and the diagnosis of sleep apnea/hypopnea requires manual scoring, it is very time-consuming and highly professional.

Exploring the impact of parent-child contact, future orientation, and self-esteem on students' learning behavior: A mediation analysis.

Introduction: The interaction between parents and children is a crucial determinant of adolescents' learning behavior, future orientation, and self-esteem. Moreover, positive relationships between parents and students significantly enhance these factors, promoting better academic and personal development outcomes.

Objective: This study aims to investigate the effects of parent-child contact on learning behavior, with future orientation and self-esteem serving as mediating factors.

Engineered microalgae for photo-sonodynamic synergistic therapy in breast cancer treatment.

Dynamic therapies such as photodynamic therapy (PDT) and sonodynamic therapy (SDT) have potential in cancer treatment. Microalgae have attracted increasing attention because of their high active mobility, flexibility in terms of functionality, and good biocompatibility. In this study, surface-engineered microalgae Chlorella vulgaris (Chl) modified with metal‒organic framework (MOF) nanoparticles (denoted Chl-MOF) are successfully developed for synergistic photo-sonodynamic therapy and immunotherapy.

Near-Infrared Light-Activated DNA Nanodevice for Spatiotemporal In Vivo Fluorescence Imaging of Messenger RNA.

Real-time visualization of messenger RNA (mRNA) is essential for tumor classification, grading, and staging. However, the low signal-to-background ratios and nonspatiotemporal specific signal amplification restricted the in vivo imaging of mRNA. In this study, a near-infrared (NIR) light-activated DNA nanodevice (DND) was developed for spatiotemporal in vivo fluorescence imaging of mRNA.

Tailored Lead-Free KNN/BFO Perovskite Ferroelectric Film Heterostructures for Enhanced Electrofunctional Properties via Interface-Modulated Bilayer Design.

In this work, a bilayer lead-free perovskite ferroelectric structure was fabricated comprising a highly polar BiFeO (BFO) bottom layer and a less polar (KNa)NbO (KNN) top layer. The BFO sublayer, deposited via radio frequency magnetron sputtering without postgrowth annealing, not only exhibited enhanced crystallinity but also promoted superior microstructural properties in the sol-gel derived KNN overlayer, thereby ensuring excellent intrinsic electrical properties. Compared to the poorly crystallized single-layer KNN films directly synthesized on LNO-buffered (100)-Si substrate, the KNN layer in the bilayer structure demonstrated a strong (100) texture, along with a dense, homogeneous, fine-grained morphology.

Seeding Control in Chirality Triggering of Red-Emitting Organic Charge-Transfer Cocrystal Helixes from Achiral Molecules.

Supramolecular chirality has gained immense attention for great potential, in which the rational engineering strategy facilitates unique helical stacking/assembly, high chiroptical behavior, and prime biomedical activity. In this study, we reported a novel chiral organic donor-acceptor cocrystal based on asymmetrical components of benzo()naphtho(1,2-)thiophene (BNT) and 9-oxo-9H-indeno(1,2-)pyrazine-2,3-dicarbonitrile (DCAF) that exhibited red emission using a simple solution approach. During the self-assembly, a kinetically controlled growth of polar solvent or substrate induction led to the chiral packing and helical morphology twisted by the cooperation of electrostatic potential energy and chirality.

Older adults' self-perception, technology anxiety, and intention to use digital public services.

To improve the happiness of the older adults enjoying digital public services, this study examines the structural relationship among self-perception of aging, subjective well-being, technology anxiety, self-efficacy, perceived usefulness, and intention to use digital public services for older adults in the context of digital public services. We employ Structural Equation Modeling (SEM) for empirical analysis (N = 345, February to October 2023). The negative self-perception of aging may lead to the negative emotions of older adults on technology, which will reduce subjective well-being and increase technology anxiety.

Rapid and high accuracy identification of culture medium by CNN of Raman spectra.

Culture media are widely used for biological research and production. It is essential for the growth of microorganisms, cells, or tissues. It includes complex components like carbohydrates, proteins, vitamins, and minerals.

Polyvalent Aptamers Structure-Mediated Fluorescent Aptasensor for the Early Diagnosis of Alzheimer's Disease by Coupling with HCR and CRISPR-Cas System.

The early diagnosis of Alzheimer's disease (AD) plays a vital role in slowing the progression of AD and improving the quality of human life. However, it is still a challenge in the medical field. Herein, an ultrasensitive fluorescent aptasensor was designed for the detection of special phosphorylated tau181 (P-tau181) by coupling with polyvalent aptamers (PAs) structure, hybridization chain reaction (HCR), and the CRISPR-Cas system.

Estimation of PEMFC optimal parameters based on an improved butterfly optimization algorithm.

This paper introduces a novel butterfly optimization algorithm, called the spiral search and dynamic crossover based butterfly optimization algorithm (SCBO), for parameter estimation in proton exchange membrane fuel cell (PEMFC) models. To enhance the global performance of the butterfly algorithm, a spin-search strategy is incorporated to expand its exploration range, while an adaptive factor is introduced to strike a balance between exploration and exploitation. Additionally, a dynamic crossover operation is integrated to enhance solution diversity, addressing the algorithm's tendency to converge to local optima.

The Synergy Effect of Al/Ti Electrodes on Effective Electron Injection for n-Channel Transistors and Ambipolar Complementary Circuits.

This paper reports the utilization of cost-effective bottom-contact electrodes composed of aluminum (Al) and titanium (Ti) to facilitate efficient electron injection in n-channel organic transistors. The optimized Al/Ti electrode has a low work function of around 4.03 eV, combining the high conductivity of Al with the stable interface of Ti, making it highly suitable for the electrodes of n-channel transistors.