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Silver bismuth sulfide quantum dot-based bioelectronics for light-mediated neuronal stimulation

ACTA OPHTHALMOLOGICA 2025年第S284期103卷

作者： Kaleli, Humeyra Nur Balamur, Ridvan Kaya, Tarik Safa Onal, Asim Pehlivan, Cigdem Sahin, Afsun Nizamoglu, Sedat Hasanreisoglu, Murat Koc University Research Center for Translational Medicine Istanbul Turkey Department of Electrical and Electronics Engineering Koc University Istanbul Turkey Department of Material Science and Engineering Koc University Istanbul Turkey Department of Biomedical Science and Engineering Koc University Istanbul Turkey Department of Ophthalmology School of Medicine Koc University Istanbul Turkey

Aims/Purpose: Nanomaterial based bioelectronics have been effectively developed as optoelectronic bio-interfaces for neural stimulation and can be fabricated from diverse substances to adapt to cellular environments. In this study, we employed silver bismuth sulfide (AgBiS2) quantum dot (QD)-based neural interfaces stimulated by near-infrared light. Methods: Primary neuron isolation and culture on AgBiS2 QD based photovoltaic device and indium tin oxide (ITO) control device was performed. Cell viability was assessed by CTG, MTT, Live/Dead assay and LDH leakage assays. Cellular stress with light stimulation was assessed by measuring intracellular reactive oxygen species. Cell specific biomarkers, NeuN, beta-III Tubulin and F-actin, were examined by immunofluorescence staining to demonstrate short- and long-term morphological changes and neural network improvements. Number of neuron count and neurite length measurement were analyzed to compare groups. Under light stimulation (λ = 780 nm), neural dynamics and electrophysiological activity were examined through intracellular calcium flow and patch clamp. Results: Throughout the 14-day culture period, neurons remained healthy and viable, preserving their characteristics and forming extensive networks with neurite outgrowth on both the device and ITO. Light stimulation was found to have no adverse effects on viability or intracellular stress levels. The device demonstrated successful photostimulation of neurons with calcium release and generating action potential under 780 nm light illumination which is validating its potential to be used as optoelectronic bio-interfaces for neural applications. Conclusions: Our study holds high potential for the development of QD-based retinal prosthesis, enabling near infrared light-controlled activation in vision related diseases. Funding Information: This study was funded by the European Union (ERC, MESHOPTO, 101045289). References Balamur R, Oh JT, Karatum O, Wang Y, Onal A, Kaleli H

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Simultaneous improving luminescence intensity and stability of CsPbBr_(3):SCN−@Eu/Zr-Uio-66-NH_(2) with tunable emissions from blue to green and applications in indoor photovoltaics

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Nano Research 2024年第8期17卷 6879-6887页

作者： Minze Li Yao Sun Honglai Lu Peifen Zhu Ruihong Wang Guofeng Wang Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080China Department of Electrical Engineering and Computer Science University of MissouriColumbiaMO 65211USA

The construction of stable and efficient materials that emit blue and green light remains a *** the blue light materials reported,metal-organic framework(MOF)materials are rarely reported as blue phosphors due to their weak luminescence *** on the construction of CsPbBr_(3)@MOF(CPB@MOF),an innovative idea was proposed to simultaneously enhance the green luminescence of CPB and the blue luminescence of MOF through the interaction between CPB and MOF for the first *** expected,the blue luminescence from CPB:7%SCN−@0.5%MOF:Eu as well as the green luminescence from 5%CPB:7%SCN−@MOF:Eu was sufficient to construct high-performance light-emitting diode(LED)devices and further excite solar cells to generate stable photoelectric *** white LED(WLED)device with excellent color quality(color rendering index(CRI)=96.2)and correlated color temperature(CCT=9688 K)can be constructed by using the obtained blue-emitting CPB:7%SCN-@0.5%MOF:Eu,green-emitting 5%CPB:7%SCN−@MOF:Eu,and red-emitting PPB:30%Mn^(2+).The density functional theory(DFT)theoretical calculation results indicate that the p orbital of Pb plays the major role in the conduction band,and the p orbital of Br plays the major role in the valance band of CPB and CPB:SCN−.While the p orbital of O plays the major role in both the conduction band and valance band of *** heat capacity of CPB and CPB:SCN−separately reaches the Dulong–Petit limit at 200 and 400 K,indicating that the thermal stability of CsPbBr_(3)increases after SCN−doping.

关键词： CsPbBr_(3):SCN−@Uio-66-NH_(2) composites luminescence stability white light-emitting diodes(WLEDs) indoor photovoltaics density functional theory(DFT)calculation

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Metallized polymer current collector as“stress acceptor”for stable micron-sized silicon anodes

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Journal of Energy Chemistry 2025年第2期101卷 786-794,I0017页

作者： Ziyi Cao Haoteng Sun Yi Zhang Lixia Yuan Yaqi Liao Haijin Ji Shuaipeng Hao Zhen Li Long Qie Yunhui Huang State Key Laboratory of Material Processing and Die&Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina Department of Chemistry Brown UniversityProvidence RI 02912United States

Micron-sized silicon(μSi)is a promising anode material for next-generation lithium-ion batteries due to its high specific capacity,low cost,and abundant ***,the volume expansion that occurs during cycling leads to the accumulation of undesirable stresses,resulting in pulverization of silicon microparticles and shortened lifespan of the ***,a composite film of Cu-PET-Cu is proposed as the current collector(CC)forμSi anodes to replace the conventional Cu ***-PET-Cu CC is prepared by depositing Cu on both sides of a polyethylene terephthalate(PET)*** PET layer promises good ductility of the film,permitting the Cu-PET-Cu CC to accommodate the volumetric changes of silicon microparticles and facilitates the stress release through ductile *** a result,theμSi electrode with Cu-PET-Cu CC retains a high specific capacity of 2181 mA h g^(-1),whereas theμSi electrode with Cu CC(μSi/Cu)exhibits a specific capacity of 1285 mA h g^(-1)after 80 *** stress relieving effect of CuPET-Cu was demonstrated by in-situ fiber optic stress monitoring and multi-physics *** work proposes an effective stress relief strategy at the electrode level for the practical implementation ofμSi anodes.

关键词： Micron-sized Si anodes Metallized polymer current collector Stress relieving Electrode design

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Particle Size and Dispersion Properties of Cellulose Beads Fabricated via Coaxial Needle Spray Method

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Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2023年第5期55卷 5-12页

作者： Kim, Younglae Xu, Feng Cho, Byoung-Uk Department of Paper Science & Engineering College of Forest and Environmental Sciences Kangwon National University Korea Republic of Department of Paper Material Science & Engineering College of Forest and Environmental Sciences Kangwon National University Korea Republic of

Microbeads with a diameter of 500 μm or smaller are used in the production of cosmetic products, such as foam cleansers. To replace the usage of plastic microbeads in cosmetics with ecofriendly alternatives such as cellulose, development of technologies for producing cellulose beads with a diameter of ≤500 μm, particularly reducing their sizes to © 2023 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

关键词： Particle size

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Axial coordinated iron-nitrogen-carbon as efficient electrocatalysts for hydrogen evolution and oxygen redox reactions

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Chinese Chemical Letters 2025年第1期36卷 637-642页

作者： Yanan Zhou Li Sheng Lanlan Chen Wenhua Zhang Jinlong Yang School of Material Science and Chemical Engineering Institute of Mass SpectrometryNingbo UniversityNingbo 315211China Department of Chemical Physics University of Science and Technology of ChinaHefei 230026China Department of Material Science and Engineering University of Science and Technology of ChinaHefei 230026China Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Materials for Energy Conversion and Synergetic Innovation Centre of Quantum Information and Quantum PhysicsUniversity of Science and Technology of ChinaHefei 230026China

Designing highly active electrocatalysts for the hydrogen evolution reaction(HER)and oxygen evolution and reduction reactions(OER and ORR)is pivotal to renewable energy ***,based on density functional theory(DFT)calculations,we systematically investigate the catalytic activity of iron-nitrogen-carbon based covalent organic frameworks(COF)monolayers with axially coordinated ligands(denotes as Fe N_(4)-X@COF,X refers to axial ligand,X=-SCN,-I,-H,-SH,-NO_(2),-Br,-ClO,-Cl,-HCO_(3),-NO,-ClO_(2),-OH,-CN and-F).The calculated results demonstrate that all the catalysts possess good thermodynamic and electrochemical *** different ligands axially ligated to the Fe active center could induce changes in the charge of the Fe center,which further regulates the interaction strength between intermediates and catalysts that governs the catalytic ***,FeN_(4)-SH@COF and Fe N_(4)-OH@COF are efficient bifunctional catalysts for HER and OER,FeN_(4)-OH@COF and FeN_(4)-I@COF are promising bifunctional catalysts for OER and *** findings not only reveal promising bifunctional HER/OER and OER/ORR catalysts but also provide theoretical guidance for designing optimum ironnitrogen-carbon based catalysts.

关键词： Axial coordinated ligands DFT calculation Hydrogen evolution reaction Oxygen evolution reaction Oxygen reduction reaction

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Simulation of metal ceramic single layer coatings for solar energy applications

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materials science for Energy Technologies 2024年第1期7卷 85-90页

作者： Singh M, Muralidhar Kumar, Manish Sivaiah, P. G., Vijaya Kumar, Amit Kumar, Dheeraj Pandey, Shatrudhan Singh, Abhishek Kumar Deifalla, Ahmed Farouk Hasnain, S.M. Mozammil Department of Mechanical Engineering RV Institute of Technology and Management Chaithanya Layout 8th Phase J. P. Nagar Bengaluru560076 India Department of Mechanical Engineering Madanapalle Institute of Technology & Science Madanapalle517325 India Department of Mechanical Engineering Dayananda Sagar College of Engineering Bangalore560078 India Department of Mechanical Engineering Sri Eshwar College of Engineering Coimbatore641202 India Department of Mechanical Engineering National Institute of Technology Durgapur713209 India Department of Production and Industrial Engineering Birla Institute of Technology Mesra Ranchi835215 India Department of Structural Engineering and Construction Management Future University New Cairo City11835 Egypt Faculty of Engineering and Applied Science Usha Martin University Ranchi835103 India

The coating materials, thickness and number of layers directly influence the reflectance and absorptance properties of the thin films. However, while selecting the materials for single and coatings, the substrate's refractive index;bond layer, functional layer and protective layer have to be carefully chosen to obtain the desired reflectance and absorptance values. Hence, modelling and simulating the thin film coatings is essential before conducting the experiments to get meaningful results. The simulation results of single coatings have been discussed. Generally, glass is one of the widely used substrate materials for solar reflectors, aluminum is the optimal functional material, with a reflection of 93 % of light. Nickel would be a preferable functional layer with a reflection of 64 % and absorptance of 36 %, Si3N4 being the acceptable bond layers and protective layers with a reflection of 68 % some solar thermal receiver tube applications however research effort is being made to find alternate lightweight materials for this application. Polycarbonate has been chosen as an alternate material for the substrate because it is light in weight with a reflection of 93 %, which is durable and not fragile. © 2023

关键词： Reflection

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Study on Dispersion Characteristics of HwBKP Hydrophobized by Repeated Gas Grafting in Polypropylene

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Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2023年第2期55卷 59-66页

作者： Shin, Yoo-Rim Noh, Kyu-Hwan You, Ha-Un Kim, Hyoung-Un Lee, Jin-Sol Ryu, Jeong-Yong Department of Paper Science & Engineering College of Forest and Environmental Sciences Kangwon National University Korea Republic of Department of Paper Material Science & Engineering College of Forest and Environmental Sciences Kangwon National University Korea Republic of

This study investigated the fiber dispersion characteristics and physical property changes of HwBKP-PP composites through repeated hydrophobization and recycling of cellulose fiber. The gas-grafted paper was disintegrated and then gas-grafted again to achieve uniform dispersion of the cellulose fibers with PP. With each gas grafting repetition, the interfacial affinity between the hydrophobized fibers and PP improved, leading to enhanced tensile strength and melt flow index of the HwBKP-PP composite material due to the improved fiber dispersibility. However, recycling of hydrophobic paper resulted in the loss of fines in the recycled paper, so that increase in average fiber length caused fiber agglomeration, resulting in poor dispersibility, and subsequently decreasing the tensile strength and melt flow index of the composite. © 2023 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

关键词： Gases

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Comparison of the mechanical characteristics of biocomposites of unsaturated polyester resin with cellulose extracted from corn silk and treated corn silk

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Discover Mechanical engineering 2024年第1期3卷 1-10页

作者： Ali, Md. Farhad Shabur, Md. Abdus Safiur Rahman, G.M. Institute of Leather Engineering and Technology University of Dhaka Dhaka 1209 Bangladesh Department of Material Science and Engineering University of Rajshahi Rajshahi 6205 Bangladesh

The purpose of this study is to extract cellulose from corn silk (CS) fiber and use it as a reinforcing filler in unsaturated polyester resin (UPR) matrix. In this study, the cellulose is characterized using a Fourier Transform Infrared Spectrometer (FTIR), and the resulting UPR/cellulose biocomposite's mechanical properties (such as flexural and impact testing) are assessed. Scanning electron microscopy (SEM) provided strong support for mechanical rather than a chemical bond between fiber and UPR. Additionally, the sodium hydroxide treated CS in UPR biocomposite and comparing it with neat UPR. The agricultural byproduct rich in cellulose corn silk is a natural polymer known for its structural strength and UPR has garnered attention as a biopolymer with notable flexibility, making it an appealing choice for plastic product manufacturing. However, the drawback of UPR lies in its inherent deficiency in both stiffness and strength. According to the FTIR data, extracted cellulose (CS) had fewer ketone (C = O) and hydroxyl (-OH) groups than virgin cellulose. It was shown that throughout the extraction process, hemicellulose and lignin were more eliminated, producing a more pure form of cellulose. When filled in UPR, cellulose and treated CS both caused the impact strength of UPR biocomposites to drop. For both treated CS and cellulose, it was shown that the flexural modulus and flexural strength increased as the filler amount increased to a definite percentage (12%) after which it decreased. The result revealed the tensile strength and tensile modulus achieved by 0% of fiber with 48 N/mm² and 51 N/mm² and highest at 12% of fiber with 54.3 N/mm² and 68.8 N/mm² for CS + UPR. And 53.4 N/mm² and 69.6 N/mm² for cellulose + UPR composite,, respectively. In comparison, the flexural characteristics of UPR/cellulose were marginally inferior to those of UPR/treated CS. However, the impact resistance showed a signifi

关键词： Biocomposite Cellulose Corn Silk Mechanical properties Unsaturated Polyester Resin

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The heat transfer with nanomaterial enhanced phase change materials in different container shapes

Journal of Energy Systems

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Journal of Energy Systems 2023年第2期7卷 173-186页

作者： Muzhanje, Allan T. Hassan, Mohsen A. Ookawara, Shinichi Hassan, Hamdy Energy Resources Engineering Department New Borg El-Arab City Alexandria Egypt Material Science and Engineering Department New Borg El-Arab City Alexandria Egypt Tokyo Institute of Technology Chemical Science and Engineering Department Tokyo Japan Assiut University Assiut Egypt

The heat transfer is studied during the melting and solidification of sp11 and sp24 phase change materials in different container shapes. The materials are further mixed with nano-alumina and nano CuO enhancements. We aim to identify the most favorable phase change material for free-cooling in summer and free-heating in winter. Ansys Fluent 20.2 is used to analyze the 2D models for the melting and solidification mechanisms of the phase change samples in cylindrical, square, rectangular, and elliptical-shaped capsules. The nanomaterial-enhanced phase change material improves the melting and solidification behavior over the base phase change material by as much as 9.8%. It is further observed that the nanomaterial-enhanced phase change material particularly in the rectangular-shaped containers has faster melting and solidification rates by over 43% compared to the others. The material sp24 with 4% nano-alumina in a rectangular profile has the shortest melting times ~70-100 mins, when the inlet temperatures are 313 and 318 K. The same material has the shortest solidification time of 426 mins, two times faster compared to the 928 mins observed with the cylindrical capsule under the same conditions. The Sp11 with the nano-alumina in a rectangular capsule also has a short melting time of 134 mins. The rectangular profile is found capable of achieving the highest temperature drop about 3.3 K during free cooling of inlet air using nano-enhanced sp24. A progress is realized in unmasking the potential of the thermal energy battery using hybrid geometry and nanomaterial enhancements. © 2023 The Author(s).

关键词： Copper oxides

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Experimental study of rheological characteristics of bentonite-based drilling fluids

Experimental study of rheological characteristics of bentoni...

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ITA-AITES World Tunnel Congress, WTC 2024

作者： Javarone, Stefano Palombini, Marta Cinelli, Matilde Bavasso, Irene Sebastiani, Diego GEEG Geotechnical and Environmental Engineering Group Rome Italy Department of Chemical Engineering Material Environment Sapienza University of Rome Italy Department of Structural and Geotechnical Engineer Sapienza University of Rome Italy

ISBN: (纸本)9781032800424

Bentonite and polymer-based drilling slurries are widely used in numerous geotechnical applications such as Slurry Shield TBM tunnelling, MicroTunnelling, Horizontal Directional Drilling and other trenchless technologies, piles and diaphragms constructions. In all cases, the rheological characteristics of the fluids must be correctly adjusted to ensure the stability of the excavation, proper lubrication and transportability of the excavated material. To date, there are several international standards and many best practices, empirical abacuses and indications for the definition of rheological properties of drilling fluids. However, there is often a lack of correlation between the results of different tests or measurements that can be carried out in laboratories using rheometers, viscometers and other sensitive and accurate equipment, and the rapid measurements that are widely used on site. The study presented in this paper involves the systematic performance of laboratory tests and rapid measurements on a natural bentonite used in the construction of tunnels and other underground works. The aim is to provide a broad overview of the rheological characteristics of drilling fluids prepared at different bentonite dosages, a series of correlations between the results of laboratory tests carried out using different mixing speed and mixing time. The results of the study support a better selection of the correct properties during drilling, an informed choice of the most appropriate measuring instruments and a more accurate measurement and control of the rheological properties of drilling fluids. © 2024 The Author(s).

关键词： Drilling fluids

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