Applied Research最新文献_第9页

Mössbauer study of iron oxide nanoparticles 氧化铁纳米粒子的摩斯鲍尔研究

Applied Research Pub Date : 2024-05-18 DOI: 10.1002/appl.202400008

Christina Karra, Charalampos Sarafidis

{"title":"Mössbauer study of iron oxide nanoparticles","authors":"Christina Karra, Charalampos Sarafidis","doi":"10.1002/appl.202400008","DOIUrl":"10.1002/appl.202400008","url":null,"abstract":"Magnetic nanoparticles have recently attracted attention for biochemical and medical applications like drug delivery and hyperthermia for a variety of reasons with most important being their stability, chemical compatibility, and suitable magnetic properties like moderate specific mass magnetization. Cobalt ferrites are a well-studied family of materials and the partial substitution of Fe3+ cations by rare earth (RE) ones may be used to tune the magnetic properties. In the present work pure and substituted Co ferrite nanoparticles with nominal stoichiometry CoFe2−xRxO4 (R = Yb, Gd; x = 0.05, 0.1, 0.3) synthesized by the co-precipitation method are studied with 57Fe Mössbauer spectroscopy to determine the incorporation of RE ions in the spinel lattice. The fitting procedure was based on the standard spinel model using two sextets for the octahedral and the tetrahedral coordinated positions of Fe atoms. All isomer shift values were found within the typical range of high spin ferric ions while quadrupole splitting values strongly suggest that there is a substitution preference; RE ions replace iron ones in octahedral sites. The inversion parameter was found to decrease with RE content (lowest value about 0.534 for CoFe1.90Yb0.10O4) and thermal treatment always results in changing the material toward normal spinel, while pure CoFe2O4 was inverse. Thermal treatment of substituted materials in ambient air at temperature range 1500–1700 K for 12 h increase crystallite size and changes the degree of inversion.","PeriodicalId":100109,"journal":{"name":"Applied Research","volume":"3 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/appl.202400008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141124828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Theoretical insights toward a highly responsive AgInSe2 photodetector 实现高响应 AgInSe2 光电探测器的理论见解

Applied Research Pub Date : 2024-05-17 DOI: 10.1002/appl.202400038

Md. Islahur Rahman Ebon, Ahnaf Tahmid Abir, Dinesh Pathak, Jaker Hossain

{"title":"Theoretical insights toward a highly responsive AgInSe2 photodetector","authors":"Md. Islahur Rahman Ebon, Ahnaf Tahmid Abir, Dinesh Pathak, Jaker Hossain","doi":"10.1002/appl.202400038","DOIUrl":"10.1002/appl.202400038","url":null,"abstract":"This treatise showcases the design as well as modeling about a photodetector (PD) based on AgInSe2 (AISe), a direct bandgap chalcopyrite with a bandgap of 1.19 eV. The PD exhibits outstanding optical and electronic characteristics, showcasing remarkable performance. The PD has been systematically investigated by varying the width, carrier density, and defect densities of specific layers, as well as the interface defect density of specific interfaces. Various layers are optimized to enhance the overall performance of the PD and the impact of different device resistances is analyzed. The photocurrent (JSC) and voltage (VOC) of the heterostructure photodetector are determined to be 38.60 mA/cm2 and 1.0 V, in turn. The maximum responsivity (R) and detectivity (D*) are identified as 0.70 A/W and 4.60 × 1016 Jones, respectively at a wavelength of 940 nm. The spectral response exhibits significantly higher values in the range of 800–1000 nm, indicating the device's capability to detect near-infrared (NIR) light. This research provides valuable insights for the manufacturing of AISe material-based photodetectors with enhanced performance.","PeriodicalId":100109,"journal":{"name":"Applied Research","volume":"3 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/appl.202400038","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141126157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Green synthesis and characterization of silver anchored ZnO nanoparticle as the antimicrobial reinforcement for polylactide films 银锚定ZnO纳米颗粒聚乳酸抗菌增强剂的绿色合成与表征

Applied Research Pub Date : 2024-05-10 DOI: 10.1002/appl.202400029

Vellaiyan Ganesan, Muruganandham Hariram, Singaravelu Vivekanandhan, Sankaralingam Muthuramkumar

引用次数: 0

Upgrading event driven Monte Carlo simulations for molecule-based morphological control for battery and sensor applications 升级事件驱动蒙特卡洛模拟，实现基于分子的形态控制，用于电池和传感器应用

Applied Research Pub Date : 2024-05-09 DOI: 10.1002/appl.202400048

Yoshi W. Marien, Maofan Zhou, Mariya Edeleva, Dagmar R. D'hooge

{"title":"Upgrading event driven Monte Carlo simulations for molecule-based morphological control for battery and sensor applications","authors":"Yoshi W. Marien, Maofan Zhou, Mariya Edeleva, Dagmar R. D'hooge","doi":"10.1002/appl.202400048","DOIUrl":"10.1002/appl.202400048","url":null,"abstract":"Multiphase polymeric materials and applications play a prominent role in our society. One of the key challenges is the design and modification of their macromolecules so that the composition and structuring of the phases as well as the interactions between them can be controlled from the molecular scale onwards. In the present contribution, it is highlighted that more recently developed event driven (kinetic) Monte Carlo models provide an interesting framework to grasp molecular variations over various length scales. The strength lies in the tracking of individual molecules per phase of interest so that interphase transfer events can be sampled based on the distributed nature of the (macro)molecules present. Hence, the micro-scale of local concentrations and temperatures can be connected to the meso-scale defining interphase transport and morphological variations, with an additional connection to the macro- or application scale within reach by adding macro-scale transfer events to the overall sampling scheme. Starting from a benchmark coupled matrix based Monte Carlo (CMMC) study on the multiphase formation of engineering composites which explicitly acknowledges the type of (macro)molecules present in each phase, it is showcased that the CMMC framework can support the general field of energy and electronics applications. This is highlighted through (i) a case study devoted to the design of polymer electrolytes for batteries, and (ii) a case study on blend design for the regulated stretching of piezoresistive sensors.","PeriodicalId":100109,"journal":{"name":"Applied Research","volume":"3 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/appl.202400048","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140994817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Combination of NIR and UV-LEDs enables physical and chemical drying of aqueous coating dispersions as new green technology 近红外和紫外 LED 的结合使水性涂料分散体的物理和化学干燥成为新的绿色技术

Applied Research Pub Date : 2024-05-07 DOI: 10.1002/appl.202400011

Lukas Appelhoff, Nicolas Hornemann, Jochen Schmidt, Anita Krautz, Bernd Strehmel

{"title":"Combination of NIR and UV-LEDs enables physical and chemical drying of aqueous coating dispersions as new green technology","authors":"Lukas Appelhoff, Nicolas Hornemann, Jochen Schmidt, Anita Krautz, Bernd Strehmel","doi":"10.1002/appl.202400011","DOIUrl":"10.1002/appl.202400011","url":null,"abstract":"Heptamethine based cyanines, namely 1,3,-trimethyl-2-(2-2[2-phenylsulfanyl-3-[2-(1,3,3-trimethyl-1,3,3-trithyl-1,3-dihydro-indol-2-ylidene)-ethylidene]cyclohex-1-enyl]vinyl)-3H-indolium chloride (S1) and 2-[2-(2-chloro-[2-[1,1-dimethyl-7-sulfo-3-(4-sulfobutyl)-1,3-dihydro-benzo[e]indol-2-ylidene]-ethylidene]cyclopent-1-enyl]vinyl]-1,1-dimethyl-7-sulfo-3-(4-sulfobutyl)-1Hbenzo[e]indolium hydroxide, inner salt, triethylammonium salt (S2), efficiently result in physical drying of an aqueous dispersion comprising a polyurethane binder. S2 possesses a water solubility of 40 g/L. A high-intensity near-infrared-LED emitting at 820 nm with an intensity of 1 W/cm2 served as light source. The cyanine converted the light absorbed into heat by internal conversion needing less drying time compared to conventional drying. Water content after film formation showed less then 1%. In the second step, ultraviolet (UV) exposure with a LED emitting at 395 nm resulted in formation of semi-interpenetrating polymer networks by crosslinking of the multifunctional (meth)acrylate operating as reactive diluent. Ethyl phenyl(2,4,6-trimethylbenzoyl)phosphinate-L served as effective UV-photoinitiator. Furthermore, the UV-exposure together with Norrish Type I and Type II photoinitator systems results in a very efficient bleaching of the green physical dried film. This contribution shows for the first time a new photonic hybrid technique describing successful replacement of an oven-based process by a photonic based step that generates heat needed for drying.","PeriodicalId":100109,"journal":{"name":"Applied Research","volume":"3 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/appl.202400011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141003335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of the magnetic and structural properties in the non-stoichiometric Heusler alloy Ni50Mn25+xSn25-x; x = 13, 14 非化学计量 Heusler 合金 Ni50Mn25+xSn25-x; x=13,14 的磁性和结构特性研究。

Applied Research Pub Date : 2024-05-03 DOI: 10.1002/appl.202400014

Dimitris Anastasakos-Paraskevopoulos, Charalampos Sarafidis, Maria Giannouri, Vasileios Alexandrakis, Ioannis Panagiotopoulos

{"title":"Investigation of the magnetic and structural properties in the non-stoichiometric Heusler alloy Ni50Mn25+xSn25-x; x = 13, 14","authors":"Dimitris Anastasakos-Paraskevopoulos, Charalampos Sarafidis, Maria Giannouri, Vasileios Alexandrakis, Ioannis Panagiotopoulos","doi":"10.1002/appl.202400014","DOIUrl":"10.1002/appl.202400014","url":null,"abstract":"Memory shape magnetic alloys, especially Heusler alloys, are important materials in replacing conventional cooling with magnetic systems. In the present study off stoichiometric Heusler alloys with nominal composition Χ50Υ25+xΖ25-x (X = Ni; Y = Mn; Z = Sn; x = 13, 14) were prepared by arc melting followed by thermal treatment. Structural properties were analyzed with X-ray diffraction at room temperature (RT) and at elevated temperatures, above the martensite—austenite transition area, to determine the relevant crystallographic parameters and observe the transition. Martensite stabilization at RT appears to be a challenge, coexistence of martensite—austenite phases were observed and calculated for both 38–12 and 39–11 (16% and 12% austenite, respectively). Magnetization measurements versus temperature and field were recorded in the areas of interest where 1st order transitions were expected (355 K for x = 13 and 408 K for x = 14), and the magnetic entropy's changes (ΔSm) were determined [0.4 (J/kgK) for x = 13 and 0.3 J/(kgK) for x = 14; Hmax = 1 T]. The complex character of the magnetic properties and their dependence on Mn-Sn ratio and on the distance between Mn atoms is discussed. The structure and the lattice parameters were determined using an anisotropic strain broadening model; stress and strain were detected in the structure due to crystal phase coexistence.","PeriodicalId":100109,"journal":{"name":"Applied Research","volume":"3 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/appl.202400014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141014892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modification induced by electronic excitation in CoFe2O4 thin films: Structural, morphological, and magnetic properties CoFe2O4 薄膜中电子激发引起的改性：结构、形态和磁性能

Applied Research Pub Date : 2024-05-03 DOI: 10.1002/appl.202300136

Razia Nongjai, Manju Bala, Shakeel Khan, Annapoorni S., Asokan Kandasami

{"title":"Modification induced by electronic excitation in CoFe2O4 thin films: Structural, morphological, and magnetic properties","authors":"Razia Nongjai, Manju Bala, Shakeel Khan, Annapoorni S., Asokan Kandasami","doi":"10.1002/appl.202300136","DOIUrl":"10.1002/appl.202300136","url":null,"abstract":"The present study focuses on the modification induced by 200 MeV Ag15+ and 100 MeV O7+ ion irradiations on the structural, surface morphological, and magnetic properties of radio frequency sputtered CoFe2O4 (CFO) thin films grown on SiO2/Si (100) substrates. X-ray diffraction shows amorphization of the CFO thin films when irradiated with Ag ions and varies with fluences. This effect is absent in the case of O ion irradiated CFO films. These results are consistent with the measurements from the Raman spectroscopy, where the intensities of Eg and T2g modes are significantly reduced and further disappear in the high fluence. The surface morphology of the O ion irradiated films is dramatically different from the pristine and Ag ion irradiated films where the surfaces appear in nanopillars-like patterns. The topography of the O ion irradiated films appears to be like hill and valley structures, the roughness first increases (from 10.11 to 24.39 nm). Then it decreases to 18.93 nm on further increasing ion fluence. The coercivity, remnant magnetization, and saturation magnetization increase upon irradiation at low fluence 5 × 1011 ions/cm2 for both the ion beams and then downturn with the increase of fluence 5 × 1012 ions/cm2. The changes in the magnetic and structural characteristics are ascribed to the defects induced by ion irradiation. These results are understood based on the structural and surface modifications induced by the electronic excitation of Ag and O ions. The study depicts that a controlled selection of ions and beam fluence can tailor the structure, morphology, and magnetic properties of ferrite films.","PeriodicalId":100109,"journal":{"name":"Applied Research","volume":"3 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/appl.202300136","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141015047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of a label-free, impedance-based biosensor to identify harmful effects of pesticides on insect cells 开发无标记、基于阻抗的生物传感器，以识别农药对昆虫细胞的有害影响

Applied Research Pub Date : 2024-05-02 DOI: 10.1002/appl.202400032

Sandra Friedrich, Neha Malagimani, Stefanie Michaelis, Joachim Wegener

{"title":"Development of a label-free, impedance-based biosensor to identify harmful effects of pesticides on insect cells","authors":"Sandra Friedrich, Neha Malagimani, Stefanie Michaelis, Joachim Wegener","doi":"10.1002/appl.202400032","DOIUrl":"10.1002/appl.202400032","url":null,"abstract":"Insects are a major part of the planet's ecosystem and their vital role as pollinators for agriculture is undisputed. Alongside factors as climate change or loss of habitats, rising use of pesticides emerges as a key threat to insect populations. For fighting this man-made problem, development of an easy, fast, sensitive, and non-invasive biosensor for determining pesticide toxicity may help to ban harmful substances and formulations. Here, a biosensor based on Sf21 (Spodoptera frugiperda) insect cells as sensors and electric cell-substrate impedance sensing (ECIS) as physical transducer is described. Sf21 cell suspensions and well-defined pesticide solutions were mixed immediately before seeding on planar gold-film electrodes. The capacitance at 20 kHz was recorded as a function of time as a measurand for cell adhesion providing dose–response profiles of pesticide impact. For future in-field applications, decoupling of the cell culture routines from the actual cytotoxicity assay is mandatory. Thus, suspensions of Sf21 cells were cryopreserved at –80°C in the wells of multielectrode arrays and thawed anytime for conducting the assays. Five pesticides were tested for their concentration-dependent cytotoxicity expressed as EC50 values by ECIS and validated using the well-established WST-1 cell viability assay. Results were found to be in good agreement. Our studies revealed cytotoxic effects of some pesticides sold for home usage far below the recommended concentration and were found to be more toxic than formulations sold for agricultural industry only.","PeriodicalId":100109,"journal":{"name":"Applied Research","volume":"3 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/appl.202400032","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141019321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fluorescence emission angular dependence on a nanostructured plasmonic grating 纳米结构质子光栅的荧光发射角度依赖性

Applied Research Pub Date : 2024-04-18 DOI: 10.1002/appl.202300090

Margherita Angelini, Eliana Manobianco, Paola Pellacani, Francesco Floris, Franco Marabelli

引用次数: 0

Laser-assisted graphene-like materials for oil-spill clean up 用于溢油清理的激光辅助石墨烯类材料

Applied Research Pub Date : 2024-04-11 DOI: 10.1002/appl.202300114

Miltiadis Zamparas, Michail Athanasiou, Nikolaos Samartzis, Vassileios Dracopoulos, Spyros Yannopoulos, Theophilos Ioannides

{"title":"Laser-assisted graphene-like materials for oil-spill clean up","authors":"Miltiadis Zamparas, Michail Athanasiou, Nikolaos Samartzis, Vassileios Dracopoulos, Spyros Yannopoulos, Theophilos Ioannides","doi":"10.1002/appl.202300114","DOIUrl":"10.1002/appl.202300114","url":null,"abstract":"Conventional synthetic sorbents for oil spill cleanup are the most widely employed materials, although a major drawback is the extensive chemical modification that they have undergone, making them economically and environmentally nonsustainable. The use of inexpensive, abundant, nontoxic, biodegradable, and reusable lignocellulosic materials might be an alternative to conventional sorbents, with obvious positive impact on sustainability and circular economy. The present study subsequently utilizes the well-established process, of converting grape molasses—a byproduct of the winemaking industry that represents a typical and abundant source of biomass—into a laser-assisted graphene-like product (LA-B). Comparative experiments were carried out with two additional materials that are similarly produced by the same laser-assisted method, yet use synthetic polyimide foil and tape polymers as precursors, namely LA-F and LA-T. The results showed that diesel oil adsorption capacity of LA-B was 33.5 g/g, while the ultraoleophilic LA-T adsorbed 57 g/g and LA-F adsorbed 41 g/g. Furthermore, the crude oil uptake was 31.1, 56.0, and 38.6 g/g for LA-B, LA-T, and LA-F, respectively. The adsorption of oil on the used materials could be well-described by pseudo-second-order kinetics, showing that over 80% of oil was removed from the water within 15 min.","PeriodicalId":100109,"journal":{"name":"Applied Research","volume":"3 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/appl.202300114","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140715215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0