3,358 results match your criteria: "Nanjing University of Posts & Telecommunications[Affiliation]"

Design and Simulation for Minimizing Non-Radiative Recombination Losses in CsGeIBr Perovskite Solar Cells.

Nanomaterials (Basel)

October 2024

Institute of Advanced Materials, Jiangsu Provincial Engineering Research Center of Low Dimensional Physics and New Energy, School of Science, Nanjing University of Posts and Telecommunications (NJUPT), Nanjing 210023, China.

Article Synopsis
  • - CsGeIBr-based perovskites have a good band gap and high absorption, making them strong candidates for lead-free solar cells, but non-radiative recombination losses hold back their efficiency and stability.
  • - The study employs numerical simulations to optimize factors like perovskite thickness and defect density, while considering effects like Auger recombination to improve device performance predictions.
  • - By highlighting the impact of Auger recombination, the paper emphasizes the importance of realistic simulations for designing efficient lead-free perovskite solar cells without overestimating their performance.
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Visualizing Macrophage Polarization through Fluorescent mRNA Profiling.

Biosensors (Basel)

October 2024

State Key Laboratory of Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.

Macrophages, known for their phenotypic plasticity, play a critical role in maintaining homeostasis and inflammation-related pathogenesis. Although identifying diverse macrophage phenotypes holds promise for enhancing diagnoses and treatments of diseases mediated by macrophages, existing methodologies for differentiating macrophages often lack precision. They are limited by the cumbersome procedures that require large-scale equipment, such as flow cytometry and transcriptomic analysis.

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Design of Anti-Hund Organic Emitters Based on Heptazine.

ACS Appl Mater Interfaces

November 2024

State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing 210023, China.

Hund's rule, which is powerful in governing the first excited states of closed-shell organic materials, can hardly be violated to get inverted singlet-triplet gap (INVEST) molecules with negative singlet-triplet energy gaps (Δ), although INVEST materials have shown extraordinary photophysical properties and promising device performance especially in light-emitting diodes. Here, we propose a facile strategy to construct emissive INVEST molecules by introducing different types of substituents to heptazine in various modes, which can effectively tune the Δ to be negative with the enlarged oscillator strength () for the high fluorescence rate of the heptazine derivatives. Systematic computational studies show that the double substitution of electron-donating units with another nonconjugated substituent in hybrid substitution mode is the most favorable way in achieving slightly negative Δ and large values; the conjugated substituent will compete with heptazine to make the molecule deviate from the INVEST feature.

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The Emerging Strategy of Symmetry Breaking for Enhancing Energy Conversion and Storage Performance.

Small Methods

October 2024

College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications (NJUPT), 9 Wenyuan, Nanjing, 210023, P. R. China.

Symmetry breaking has emerged as a novel strategy to enhance energy conversion and storage performance, which refers to changes in the atomic configurations within a material reducing its internal symmetry. According to the location of the symmetry breaking, it can be classified into spontaneous symmetry breaking within the material, local symmetry breaking on the surface of the material, and symmetry breaking caused by external fields outside the material. However, there are currently few summaries in this field, so it is necessary to summarize how symmetry breaking improves energy conversion and storage performance.

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One-step detection of nanoplastics in aquatic environments using a portable SERS chessboard substrate.

Talanta

January 2025

Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China. Electronic address:

Nanoplastics present a significant hazard to both the environment and human health. However, the development of rapid and sensitive analysis techniques for nanoplastics is limited by their small size, lack of specificity, and low concentrations. In this study, a surface-enhanced Raman scattering (SERS) chessboard substrate was introduced as a multi-channel platform for the pre-concentration and detection of nanoplastics, achieved by polydomain aggregating silver nanoparticles (PASN) on a hydrophilic and a punched hydrophobic PVDF combined filter membrane.

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Tailored Polymer Hole-Transporting Materials with Multisite Passivation Functions for Effective Buried-Interface Engineering of Inverted Quasi-2D Perovskite Solar Cells.

Adv Sci (Weinh)

December 2024

Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, P. R. China.

Although quasi-2D Ruddlesden‒Popper (RP) perovskite exhibits advantages in stability, their photovoltaic performance are still inferior to 3D counterparts. Optimizing the buried interface of RP perovskite and suppress energetic losses can be a promising approach for enhancing efficiency and stability of inverted quasi-2D RP perovskite solar cells (PSCs). Among which, constructing polymer hole-transporting materials (HTMs) with defect passivation functions is of great significance for buried-interface engineering of inverted quasi-2D RP PSCs.

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The Normalized Difference Vegetation Index (NDVI) is affected by various environmental factors, and its relationship with these factors is complex. In order to explore the complex relationship between NDVI and environmental factors, this paper adopts the complex network method to construct a correlation fluctuation network and analyze the interaction between them. It is found that temperature, precipitation, soil moisture, sunshine duration, and PM2.

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Over 10% Efficiency Pure Sulfide Kesterite Solar Cells on Transparent Electrode with Cd-Ag Co-Alloying.

Small

October 2024

Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NJUPT), 9 Wenyuan Road, Nanjing, 210023, P. R. China.

The environmentally friendly elements composed of high bandgap pure sulfide CuZnSnS (CZTS) semiconductor has broad prospects for building integrated photovoltaic, double-sided, and semi-transparent solar cells when fabricated on transparent substrates. The key issues limiting the performance of CZTS solar cells are poor absorber quality and unfavorable band energy alignment causing serious charge carrier recombination. Here, thefabrication of CZTS solar cells are reported on fluorine-doped tin oxide (FTO) substrates from dimethyl sulfoxide solution and the effects of the Cd and Ag alloying on device performance.

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Remodeling the tumor immune microenvironment through hydrogel encapsulated G-Rh2 vaccine and systemic immunotherapy.

Mater Today Bio

December 2024

The Comprehensive Cancer Center, Nanjing Drum Tower Hospital, Clinical College of Nanjing Drum Tower Hospital, Nanjing University of Chinese Medicine, Nanjing, 210008, China.

Ginsenoside Rh2 (G-Rh2) is a vital bioactive compound in Traditional Chinese Medicine, celebrated for its strong pharmacological properties, particularly its potent antitumor effects. However, its poor water solubility and limited bioavailability have necessitated the development of a novel drug delivery method. In this study, we utilized an indocyanine green carboxylic acid-hydroxypropyl cellulose-abietic acid-bovine serum albumin hydrogel (ICG-HPC-AA/BSA hydrogel) as a tumor vaccine to enhance the permeability, retention, and tumor-targeted therapeutic efficacy of G-Rh2.

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Intelligent Modular DNA Lysosome-Targeting Chimera Nanodevice for Precision Tumor Therapy.

J Am Chem Soc

October 2024

State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.

Lysosome targeting chimeras (LYTACs) have emerged as a powerful modality that can eliminate traditionally undruggable extracellular tumor-related pathogenic proteins, but their low bioavailability and nonspecific distribution significantly restrict their efficacy in precision tumor therapy. Developing a LYTAC system that can selectively target tumor tissues and enable a modular design is crucial but challenging. We here report a programmable nanoplatform for tumor-specific degradation of multipathogenic proteins using an intelligent modular DNA LYTAC (IMTAC) nanodevice.

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This study aimed to investigate the relationship between perceived stress and life satisfaction under the influence of mobile phone addiction and sport commitment. Participants were recruited from eight universities located in six Chinese cities, naming Chongqing, Maoming, Nanjing, Suzhou, Shijiazhuang, and Zhengzhou. The sample consisted of 575 participants enrolled in Chinese universities, with 309 (53.

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Intrinsic Narrowband Blue Phosphorescent Materials and Their Applications in 3D Printed Self-monitoring Microfluidic Chips.

Adv Mater

December 2024

Frontiers Science Center for Flexible Electronics (FSCFE) and Xi'an Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, China.

Organic room-temperature phosphorescent (RTP) materials, especially with narrowband emission properties, exhibit great potential for applications in display and sensing, but have been seldom reported. Herein, a rare example of the intrinsic narrowband blue RTP material is fabricated and reported. A series of indolo[3,2,1-kl]phenothiazine derivatives, named Cphpz, 1O-Cphpz, and 2O-Cphpz, are designed and synthesized.

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Experimental Validation of Density Functional Theory Predictions on Structural Water Impact in Vanadium Oxide Cathodes for Zinc-Ion Batteries.

Small

December 2024

State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, Xinjiang, 830017, P. R. China.

Article Synopsis
  • This study explores how managing water content can enhance the electrochemical performance of vanadium oxide cathodes in aqueous zinc ion batteries (AZIBs) using experimental methods and density flooding theory (DFT) calculations.
  • DFT predictions suggest that a balanced amount of structural water improves electrical conductivity and zinc ion diffusion, which were validated through the synthesis of AlVO-1.6 H2O.
  • The resulting material achieved an initial capacity of 316 mAh/g and retained 97.6% capacity after 2000 cycles, indicating that controlling water content is key to developing high-performance battery cathodes.
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Millimeter-wave (mm-wave) technology, crucial for future networks and vehicle-to-everything (V2X) communication in intelligent transportation, offers high data rates and bandwidth but is vulnerable to adversarial attacks, like interference and eavesdropping. It is crucial to protect V2X mm-wave communication from cybersecurity attacks, as traditional security measures often fail to counter sophisticated threats and complex attacks. To tackle these difficulties, the current study introduces an attention-enhanced defensive distillation network (AEDDN) to improve robustness and accuracy in V2X mm-wave communication under adversarial attacks.

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Multi-Frequency Asymmetric Absorption-Transmission Metastructures-Photonic Crystals and Their Application as a Refractive Index Sensor.

Sensors (Basel)

September 2024

College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, China.

In this paper, a kind of metastructure-photonic crystal (MPC) with multi-frequency asymmetric absorption-transmission properties is proposed. It is composed of various dielectric layers arranged in a periodically tilting pattern. When electromagnetic waves (EMWs) enter from the opposite direction, MPC shows an obvious asymmetry.

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Article Synopsis
  • Cell-free millimeter wave (mmWave) MIMO is a technology designed to enhance communication network throughput while overcoming issues like shadow fading.
  • This study introduces a resource allocation scheme that considers user-centric needs and fronthaul capacity limits, utilizing statistical channel state information (CSI).
  • The proposed approach involves hybrid beamforming (HBF) at access points and central processing for signal combination, using advanced optimization algorithms to address power allocation and improve overall performance.
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A UAV Thermal Imaging Format Conversion System and Its Application in Mosaic Surface Microthermal Environment Analysis.

Sensors (Basel)

September 2024

Hangzhou Zhiyu Space Planning and Design Co., Ltd., Hangzhou 310030, China.

UAV thermal infrared remote sensing technology, with its high flexibility and high temporal and spatial resolution, is crucial for understanding surface microthermal environments. Despite DJI Drones' industry-leading position, the JPG format of their thermal images limits direct image stitching and further analysis, hindering their broad application. To address this, a format conversion system, ThermoSwitcher, was developed for DJI thermal JPG images, and this system was applied to surface microthermal environment analysis, taking two regions with various local zones in Nanjing as the research area.

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Anti-symmetric framework for balanced learning of protein-protein interactions.

Bioinformatics

October 2024

College of Computer Science and Electronic Engineering, Hunan University, Changsha 410086, China.

Article Synopsis
  • Protein-Protein Interactions (PPIs) are crucial for many biological processes, and current computational methods, especially deep learning, face challenges in predicting them efficiently due to imbalanced data and high computational costs.
  • The proposed BaPPI model uses an innovative anti-symmetric graph learning approach to achieve better PPI predictions by balancing data representation and simplifying complex dependencies, outperforming existing methods in accuracy.
  • BaPPI's code is available for public use, making it accessible for further research and applications in PPI prediction.
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CDK9 inhibitor elicits APC through a synthetic lethal effect in colorectal cancer cells.

Genes Dis

January 2025

State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing, Jiangsu 210023, China.

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Dual-Activatable Nano-Immunomodulator for NIR-II Fluorescence Imaging-Guided Precision Cancer Photodynamic Immunotherapy.

Adv Sci (Weinh)

December 2024

State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China.

Article Synopsis
  • Photodynamic immunotherapy combines light-based treatment and immune system activation to target cancer effectively, but existing methods often lead to unwanted side effects due to imprecise drug release.
  • The study introduces a dual-activatable nano-immunomodulator (DIR NP) that precisely releases its therapeutic components in response to specific stimuli, enhancing treatment effectiveness and minimizing side effects.
  • DIR NP improves photodynamic efficiency and immune response by promoting immunogenic cell death and enhancing dendritic cell maturation, which together help to control both primary tumors and prevent metastasis.
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Article Synopsis
  • Photothermal therapy (PTT) can effectively target tumors and induce immunogenic cell death, but it faces challenges with solid tumors like neuroblastoma due to obstructive fibroblast presence.
  • This study explores the synergistic effect of combining mesoporous platinum nanoparticles (MPNs) with the FDA-approved antihypertensive drug losartan, which helps break down the extracellular matrix (ECM) to enhance drug delivery.
  • Results showed that the combination led to lower tumor cell survival, higher immune cell activation, and significant tumor suppression (around 80%), suggesting this strategy is promising for improving treatment outcomes for neuroblastoma.
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Article Synopsis
  • Diabetic macroangiopathy is a significant cause of death and disability among diabetic patients, with research needed on smooth muscle cell transformation and metabolic changes beyond just glucose and lipid issues.
  • The study utilized advanced sequencing techniques on tissue samples from diabetic patients to create a detailed spatial multiomics map, revealing the composition and functions of cells in calcified vascular regions.
  • Results indicate smooth muscle cells in diabetic patients can transform into various pro-inflammatory and specialized cell types, and that metabolic reprogramming is influenced by specific transcription factors and metabolic networks, highlighting the complexity of diabetes-related vascular changes.
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Uniform Phase Permutation of Efficient Ruddlesden-Popper Perovskite Solar Cells via Binary Spacers and Single Crystal Coordination.

Adv Mater

November 2024

MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, National Innovation Platform (Center) for Industry-Education Integration of Energy Storage Technology, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.

Article Synopsis
  • 2D Ruddlesden-Popper perovskites (RPPs) are gaining popularity for their environmental stability, but their power conversion efficiency (PCE) remains lower than traditional 3D perovskite solar cells due to issues with carrier transport and phase heterogeneity.
  • The introduction of binary spacers like n-butylammonium and benzamidine helps improve the crystallization process, leading to more uniform phase distribution and enhanced carrier transport in RPP films.
  • The research achieved a record high PCE of 21.15% and an open circuit voltage of 1.26 V for low n-value RPP solar cells by using these spacers and high-quality single crystal structures, which also reduced
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Synergistic Modulation of Sn Oxidation and Perovskite Crystallization Induced by 4-Hydroxypyridine for Stable Lead-Free Solar Cells.

ACS Appl Mater Interfaces

October 2024

Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.

Article Synopsis
  • * The introduction of 4-hydroxypyridine (4-HP) into the preparation process of tin perovskite films helps improve their quality by affecting the size of precursor clusters and slowing down crystal growth, while also reducing Sn oxidation.
  • * The result of using 4-HP is a notable increase in device power conversion efficiency (PCE) to 11.3% and enhanced stability, as devices maintain their initial efficiency after 2000 hours of storage in nitrogen.
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Article Synopsis
  • Developing effective antibacterial strategies has become challenging due to bacterial resistance, prompting researchers to engineer copper sulfide nanoclusters (CuS NCs) with specific sulfur defects to enhance their effectiveness against bacterial infections.
  • By encasing these CuS NCs in a mixture of amino acids and peptides, researchers improved the uptake of these nanoparticles by E. Coli, achieving an increase in uptake of at least 1.5-fold compared to traditional methods.
  • The engineered CuS NCs demonstrate a synergistic effect in their bactericidal properties, benefiting from balanced photothermal and chemodynamic outcomes, while also being biodegradable and easy to clear after use.
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