Applied Research最新文献_第10页

Α {Silk@Gallic-Acid} hybrid material with controllable antioxidant hydrogen-atom-transfer activity 具有可控抗氧化氢原子转移活性的Α {Silk@Gallic-Acid} 混合材料

Applied Research Pub Date : 2024-06-30 DOI: 10.1002/appl.202400043

Annita Theofanous, Yiannis Deligiannakis, Maria Louloudi

{"title":"Α {Silk@Gallic-Acid} hybrid material with controllable antioxidant hydrogen-atom-transfer activity","authors":"Annita Theofanous, Yiannis Deligiannakis, Maria Louloudi","doi":"10.1002/appl.202400043","DOIUrl":"https://doi.org/10.1002/appl.202400043","url":null,"abstract":"Silk fiber, often acclaimed as the pinnacle of textile materials, finds contemporary applications in the textile industry, health, and cosmetics. Gallic acid (GA) is a well-established natural antioxidant. In the present study, a novel hybrid material SFd@GA was conceptualized and produced via surface grafting of GA onto degummed silk-fibers (SFd). Successful covalent-grafting of gallic acid onto the silk fabric surface was confirmed through Fourier-transform infrared, Raman, thermogravimetric analysis (TG-DTA), and scanning electron microscopy (SEM). electron paramagnetic resonance spectroscopy demonstrates that gallic moieties grafted on SFd@GA retain their radical/redox activity. The antioxidant capacity of the hybrid material SFd@GA was validated by quantitative analysis of antioxidant hydrogen-atom-transfer (HAT) to DPPH radicals. Our data reveal a 550% increase in antioxidant-HAT activity of SFd@GA versus natural intact silk fiber, and a 1400% increase in antioxidant-HAT activity compared to the degummed silk fiber. The paramount discovery of the present work lies in the capacity for repeated utilization of the hybrid material SFd@GA, without any discernible compromise in its antioxidant-HAT activity. Specifically, we show that SFd@GA can be employed for at least 15 consecutive cycles, retaining >98% of its HAT efficiency, for up to many days of storage under ambient conditions. We discuss this expositional performance via the controllable Hat-activity process that we propose.","PeriodicalId":100109,"journal":{"name":"Applied Research","volume":"3 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/appl.202400043","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142430289","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

Two-dimensional adaptive Whittaker–Shannon Sinc-based zooming 基于二维自适应Whittaker-Shannon的缩放

Applied Research Pub Date : 2024-06-25 DOI: 10.1002/appl.202400018

Carlo Ciulla, Blerta Shabani, Farouk Yahaya

{"title":"Two-dimensional adaptive Whittaker–Shannon Sinc-based zooming","authors":"Carlo Ciulla, Blerta Shabani, Farouk Yahaya","doi":"10.1002/appl.202400018","DOIUrl":"https://doi.org/10.1002/appl.202400018","url":null,"abstract":"In this work, we introduce a novel image zooming methodology that transitions from a nonadaptive Sin-based approach to an adaptive Sinc-based zooming technique. The two techniques base their theoretical foundation on the Whittaker–Shannon interpolation formula and the Nyquist theorem. The evolution into adaptive Sinc-based zoom is accomplished through the use of two novel concepts: (1) the pixel-local scaled k-space and (2) the k-space filtering sigmoidal function. The pixel-local scaled k-space is the standardized and scaled k-space magnitude of the image to zoom. The k-space filtering sigmoidal function scales the pixel-local scaled k-space values into the numerical interval [0, 1]. Using these two novel concepts, the Whittaker–Shannon interpolation formula is elaborated and used to zoom images. Zooming is determined by the shape of the Sinc functions in the Whittaker–Shannon interpolation formula, which, in turn, depends on the combined effect of the pixel-local scaled k-space, the sampling rate, and the k-space filtering sigmoidal function. The primary outcome of this research demonstrates that the Whittaker–Shannon interpolation formula can achieve successful zooms for values of the sampling rate significantly greater than the bandwidth. Conversely, when the sampling rate is much greater than the bandwidth, the nonadaptive technique fails to perform the zoom correctly. The conclusion is that the k-space filtering sigmoidal function is identified as the crucial parameter in the adaptive Sinc-based zoom technique. The implications of this research extend to Sinc-based image zooming applications.","PeriodicalId":100109,"journal":{"name":"Applied Research","volume":"3 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/appl.202400018","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142764485","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

Aryl structural effect on the photoinitiation abilities of aryl glycine derivatives for polymerization upon exposure to blue light 芳基结构对芳基甘氨酸衍生物在蓝光照射下光引发聚合能力的影响

Applied Research Pub Date : 2024-06-25 DOI: 10.1002/appl.202400080

H. Lai, X. Peng, D. Zhu, J. Zhang, P. Xiao

{"title":"Aryl structural effect on the photoinitiation abilities of aryl glycine derivatives for polymerization upon exposure to blue light","authors":"H. Lai, X. Peng, D. Zhu, J. Zhang, P. Xiao","doi":"10.1002/appl.202400080","DOIUrl":"https://doi.org/10.1002/appl.202400080","url":null,"abstract":"The design and development of photoinitiating systems applicable to visible light delivered from light-emitting diodes (LEDs) have attracted increasing attention owing to the wide application of photopolymerization. In this study, four aryl glycine derivatives are designed and synthesized, and their applicability as visible light-sensitive photoinitiators is thoroughly investigated. Specifically, the photoinitiation mechanism of these aryl glycine derivatives, when combined with iodonium salt, is investigated using steady-state photolysis, fluorescence, and electron paramagnetic resonance spin trapping techniques. It is revealed that radicals can be generated from aryl glycine derivatives/iodonium salt combinations upon exposure to blue LEDs (410 and 445 nm) to induce free radical photopolymerization (FRP) of (meth)acrylates. Additionally, besides FRP, a photobase generator based on one of the investigated aryl glycine derivatives is synthesized and demonstrates the capability to initiate epoxy-thiol polymerization under light irradiation. The remarkable photolatent characteristics demonstrate the significant potential in broadening the application of aryl glycine derivatives in controlled photopolymerization processes.","PeriodicalId":100109,"journal":{"name":"Applied Research","volume":"3 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/appl.202400080","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142764486","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

Role of ionic crystals as interfacial layers in metal-semiconductor junction 离子晶体在金属-半导体结中的界面层作用

Applied Research Pub Date : 2024-06-23 DOI: 10.1002/appl.202400028

Basil Eldeeb, Hisham Nasser, Raşit Turan

引用次数: 0

Similarity calculation based on homomorphic encryption 基于同态加密的相似度计算

Applied Research Pub Date : 2024-06-20 DOI: 10.1002/appl.202300098

Abel C. H. Chen

{"title":"Similarity calculation based on homomorphic encryption","authors":"Abel C. H. Chen","doi":"10.1002/appl.202300098","DOIUrl":"https://doi.org/10.1002/appl.202300098","url":null,"abstract":"In recent years, some homomorphic encryption algorithms have been proposed to provide additive homomorphic encryption and multiplicative homomorphic encryption. However, similarity measures are required for searches and queries under homomorphic encrypted ciphertexts. Therefore, this study considers cosine similarity, angular similarity, Tanimoto similarity, and soft cosine similarity and combines homomorphic encryption algorithms for similarity calculation to propose homomorphic encryption-based cosine similarity (HE-CS), homomorphic encryption-based angular similarity (HE-AS), homomorphic encryption-based Tanimoto similarity (HE-TS), and homomorphic encryption-based soft cosine similarity (HE-SCS). This study proposes mathematical models to prove the proposed homomorphic encryption-based similarity calculation methods and gives practical cases to explain the feasibility of the proposed HE-CS, HE-AS, HE-TS, and HE-SCS. Furthermore, this study proposes normalized entropy and normalized Gini impurity as evaluation factors to measure the randomness and confusion of ciphertext. In experiments, the values of normalized entropy and normalized Gini impurity are higher than 0.999, which indicates significant differences between plaintexts and ciphertexts. Moreover, the encryption time and decryption time of the proposed homomorphic encryption-based similarity calculation methods have been evaluated under different security strengths.","PeriodicalId":100109,"journal":{"name":"Applied Research","volume":"3 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/appl.202300098","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142764393","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

Silver and copper screen-printed temperature sensors on flexible substrates: The impact of ink sintering conditions and composition 柔性基底上的银和铜丝网印刷温度传感器：油墨烧结条件和成分的影响

Applied Research Pub Date : 2024-06-12 DOI: 10.1002/appl.202300138

Celina Vaquero, Leire Bilbao, Ana Pérez, Haizea Villaverde, Jon Maudes, Olatz Adarraga, Izaskun Bustero, Miren Hayet, Julen Caballero, Ibai Santamaria

{"title":"Silver and copper screen-printed temperature sensors on flexible substrates: The impact of ink sintering conditions and composition","authors":"Celina Vaquero, Leire Bilbao, Ana Pérez, Haizea Villaverde, Jon Maudes, Olatz Adarraga, Izaskun Bustero, Miren Hayet, Julen Caballero, Ibai Santamaria","doi":"10.1002/appl.202300138","DOIUrl":"10.1002/appl.202300138","url":null,"abstract":"Fully screen-printed silver and copper temperature sensors were studied up to 100°C. The influence of the processing conditions and the composition of three silver and one copper commercial inks is analyzed in this study. The curing temperature is extremely relevant to stabilize the initial resistance of silver sensors, especially for those printed with the lowest solid content ink. All printed sensors showed good linear behavior in the range of 25–100°C (R2 > 0.999) except for those fabricated with the lowest solid content silver ink, which also displayed the highest hysteresis and drift. The temperature coefficient of resistance (TCR) obtained for the copper sensors was 3.367 × 10−3 K−1 and for the three silver sensors, it ranged between 2.723 × 10−3 to 2.963 × 10−3 K−1. This TCR is higher than values reported for inkjet-printed resistive temperature detectors. Overall, this work demonstrates that low-cost, linear, screen-printed temperature sensors can be successfully fabricated on flexible substrates.","PeriodicalId":100109,"journal":{"name":"Applied Research","volume":"3 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/appl.202300138","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141353941","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

Cover Image: Volume 3 Issue 3 封面图片：第 3 卷第 3 期

Applied Research Pub Date : 2024-06-06 DOI: 10.1002/appl.202470301

引用次数: 0

Fabrication of three-dimensional micropatterned hydrophobic surfaces by fused filament fabrication printing technology 利用熔丝制造打印技术制造三维微图案疏水表面

Applied Research Pub Date : 2024-05-23 DOI: 10.1002/appl.202400003

Sergio Galvagno, Loredana Tammaro, Sabrina Portofino, Fausta Loffredo, Anna De Girolamo Del Mauro, Fulvia Villani, Giuseppe Pandolfi, Pierpaolo Iovane, Paolo Tassini, Carmela Borriello

{"title":"Fabrication of three-dimensional micropatterned hydrophobic surfaces by fused filament fabrication printing technology","authors":"Sergio Galvagno, Loredana Tammaro, Sabrina Portofino, Fausta Loffredo, Anna De Girolamo Del Mauro, Fulvia Villani, Giuseppe Pandolfi, Pierpaolo Iovane, Paolo Tassini, Carmela Borriello","doi":"10.1002/appl.202400003","DOIUrl":"10.1002/appl.202400003","url":null,"abstract":"In recent years, the interest in structured hydrophobic surfaces has considerably grown, finding applications in many industrial fields, including aerospace, automotive, and biomedical. Three-dimensional (3D) printing technology is a simple, rapid, and economic process to fabricate structured surfaces based on neat polymers and composite materials, allowing working with a wide variety of plastic materials. The manufactured surfaces show a roughness depending on the printing design and the printing resolution: this characteristic is ideal to achieve superhydrophobic properties. Furthermore, patterned surface structures can be printed by fused filament fabrication (FFF), so increasing the hydrophobic character of the samples; indeed, micro- and nanosurface structures are required to make a hydrophobic surface. In this study, 3D micropatterned textures of pillars were printed by FFF using polylactide (PLA) and polypropylene (PP) as polymer filaments and PLA/carbon nanotubes (PLA/CNTs) and PP/carbon fibers (PP/CF) as composite filaments. Morphologies of printed specimens were analyzed by optical microscopy and scanning electron microscopy. Good correspondence was found between pillar dimensions and edge-edge pillars distance of computer aided design (CAD) and composites 3D-printed samples. Their wettability was evaluated by static contact angle (CA) measurements. Results clearly show a significant increase of water CA values up to 50% in all micropatterned samples with respect to flat surfaces. This improvement was achieved by surface microstructuring without the use of nanoparticles and/or chemical treatment.","PeriodicalId":100109,"journal":{"name":"Applied Research","volume":"3 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/appl.202400003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141107215","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

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