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Fabrication and Adapting the Morphological, Structural, Optical and Dielectric Performance of PS-ZrC-SiO2 Nanocomposite Films for Optoelectronic and Energy Storage Applications PS-ZrC-SiO2纳米复合薄膜的制备及其在光电和储能领域的形态学、结构、光学和介电性能
IF 2.8 3区 材料科学
Silicon Pub Date : 2024-12-10 DOI: 10.1007/s12633-024-03206-2
Majeed Ali Habeeb, Waleed Khalid Kadhim, Fellah Mamoun, Bashaer A. Abdulkhudher
{"title":"Fabrication and Adapting the Morphological, Structural, Optical and Dielectric Performance of PS-ZrC-SiO2 Nanocomposite Films for Optoelectronic and Energy Storage Applications","authors":"Majeed Ali Habeeb,&nbsp;Waleed Khalid Kadhim,&nbsp;Fellah Mamoun,&nbsp;Bashaer A. Abdulkhudher","doi":"10.1007/s12633-024-03206-2","DOIUrl":"10.1007/s12633-024-03206-2","url":null,"abstract":"<div><p>The purpose of this work is to enhance the structural, optical, and electrical properties of (PS-ZrC-SiO<sub>2</sub>) nanostructures by creating thick coatings of polystyrene. By using the casting procedure, (PS-ZrC-SiO<sub>2</sub>) nanocomposite films are created. Compared to pure (PS), optical microscope pictures show that the (ZrC-SiO<sub>2</sub>) nanoparticles form an ongoing network inside the polymer. Peak location, peak form, and peak intensity are all changing, according to FTIR. Optical experiments showed that when (ZrC-SiO<sub>2</sub>) nanoparticle ratios were raised to (5 wt%), the absorbance of (PS-ZrC-SiO<sub>2</sub>) nanocomposites rose from 45 to 97%. In the meantime, for the allowed and prohibited indirect transitions, respectively, the energy gap of (PS-ZrC-SiO<sub>2</sub>) PNCs reduced from (4.01 to 2.11) eV and from (3.29 to 1.95) eV. These results may have implications for the use of (PS-ZrC-SiO<sub>2</sub>) nanostructures in various nanotechnology and optical applications. In furthermore, there will be a rise in the optical parameters absorption coefficient, extinction coefficient, refractive index, real and imaginary dielectric constants, and optical conductivity. As the frequency of the supplied electrical field increases, the dielectric loss (ε″) and dielectric constant (ε′) for nanocomposites decrease, but they rise as the percentage of nanoparticles (NPs) increases. The dielectric constant and A.C. electrical conductivity (σ <sub>a.c</sub>) rise by approximately 132% and 95%, respectively, when the content of (ZrC-SiO<sub>2</sub>) reaches 5 wt% at a frequency of 100 Hz. The results of the pressure sensor application demonstrate that, in comparison to other sensors, the (PS-ZrC-SiO<sub>2</sub>) nanostructures have better environmental durability, extraordinary flexibility, and remarkable pressure sensitivity; it reaches 72.07 at the highest addition rate. In light of the findings, PS-ZrC-SiO<sub>2</sub> nanostructures are attractive materials for a variety of optoelectronic nanodevices because doping PS with (ZrC-SiO<sub>2</sub>) NPs improved the optical, structural, and A.C electrical characteristics. Practically it can be used in pressure electrical sensor.</p></div>","PeriodicalId":776,"journal":{"name":"Silicon","volume":"17 2","pages":"391 - 409"},"PeriodicalIF":2.8,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Annealing on the Pyro-Phototronic Behaviour in Al/nanostructured PS-ML: p+-Si Schottky Photovoltaic Device 退火对铝/纳米结构 PS-ML:p+-硅肖特基光伏器件热释光行为的影响
IF 2.8 3区 材料科学
Silicon Pub Date : 2024-12-05 DOI: 10.1007/s12633-024-03204-4
Jonmani Rabha, Mintu Das, Saponjeet Borah, Deepali Sarkar
{"title":"Effect of Annealing on the Pyro-Phototronic Behaviour in Al/nanostructured PS-ML: p+-Si Schottky Photovoltaic Device","authors":"Jonmani Rabha,&nbsp;Mintu Das,&nbsp;Saponjeet Borah,&nbsp;Deepali Sarkar","doi":"10.1007/s12633-024-03204-4","DOIUrl":"10.1007/s12633-024-03204-4","url":null,"abstract":"<div><p>In the present study, effect of annealing in Al/nanostructured porous silicon multilayer (PS-ML): p<sup>+</sup>-Si Schottky photovoltaic device is observed for the behavioural change in its pyro-phototronic and corresponding photovoltaic effect. Under UV (365 nm) illumination condition, the as-prepared device shows maximum enhancement and increment factor of 31.16% and 186% at <span>(0.5V)</span> compared to the devices annealed at temperatures <span>(50^circ C)</span> and <span>(100^circ C)</span> respectively. However, the coupling between pyro-phototronic and photovoltaic effect remains effective only for the device annealed up to <span>(100^circ C)</span>. On further elevating the annealing temperature to <span>(150^circ C)</span>, the pyro-phototronic effect diminishes while photovoltaic is still retained. The device treated at <span>(150^circ C)</span> shows enhancement in open circuit voltage (<span>({V}_{oc})</span>) value of <span>(pm 841 mV)</span> with large value of fill factor (<i>FF</i>) of <span>(27%)</span> and power conversion efficiency (<i>PCE</i>) of <span>(9.63%)</span> and <span>(6.36%)</span> for upward and downward poling respectively. While on elevating the annealing temperature to <span>(200^circ C)</span>, device performance degrades.</p></div>","PeriodicalId":776,"journal":{"name":"Silicon","volume":"17 2","pages":"361 - 375"},"PeriodicalIF":2.8,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Silicon and Potassium Fertilization Upgrade Resilience in Bell Pepper against Salt Stress through Boosting Root Growth and Fruit Yield 硅钾肥通过促进根生长和果实产量提高甜椒抗盐胁迫能力
IF 2.8 3区 材料科学
Silicon Pub Date : 2024-12-05 DOI: 10.1007/s12633-024-03202-6
Fabiha Bushra, Disha Mallick, Md. Bappy Hossain, Sumon Chandra Pal, Prosanta Kumar Dash, Nure Kutubul Islam, Md. Abdul Mannan, Debesh Das
{"title":"Silicon and Potassium Fertilization Upgrade Resilience in Bell Pepper against Salt Stress through Boosting Root Growth and Fruit Yield","authors":"Fabiha Bushra,&nbsp;Disha Mallick,&nbsp;Md. Bappy Hossain,&nbsp;Sumon Chandra Pal,&nbsp;Prosanta Kumar Dash,&nbsp;Nure Kutubul Islam,&nbsp;Md. Abdul Mannan,&nbsp;Debesh Das","doi":"10.1007/s12633-024-03202-6","DOIUrl":"10.1007/s12633-024-03202-6","url":null,"abstract":"<div><p>Bell peppers are highly sensitive to salt stress, posing significant challenges for sustainable vegetables production especially bell pepper under suboptimal climatic conditions. Given the economic importance of bell peppers, enhancing their tolerance to salinity stress is a critical research focus over period. Silicon (Si) and potassium (K) and are crucial elements that have potential to combat salt stress significantly. This study aimed to investigate influential role of Si and K fertilization on root growth, physiological response, and fruit yield of bell pepper under salt stress. The factorial experiment included six fertilizer doses (F<sub>0</sub>: control- recommended fertilizer dose (RDF); F<sub>1</sub>: RDF + K<sub>30</sub> (35 kg ha<sup>−1</sup> K); F<sub>2</sub>: RDF + 60 kg ha<sup>−1</sup> Si (soil); F<sub>3</sub>: RDF + K<sub>30</sub> (35 kg ha<sup>−1</sup> K) + 60 kg ha<sup>−1</sup> Si (soil); F<sub>4</sub>: RDF + 100 ppm Si (foliar), and F<sub>5</sub>: RDF + K<sub>30</sub> (35 kg ha<sup>−1</sup> K) + 100 ppm Si (foliar) and five water salinity levels (control- 0.54, 3, 6, 9, and 12 dS m<sup>−1</sup>). Results revealed that root morphological traits particularly root biomass, root-shoot ratio, root length and root length density were significantly improved by RDF + K<sub>30</sub> (35 kg ha<sup>−1</sup> K) + 60 kg ha<sup>−1</sup> Si (soil), followed by RDF + K<sub>30</sub> (35 kg ha<sup>−1</sup> K) + 100 ppm Si (foliar). At 12 dS m<sup>−1</sup> salinity level, about 53% and 55% higher root and shoot biomass was reported at RDF + K<sub>30</sub> (35 kg ha<sup>−1</sup> K) + 60 kg ha<sup>−1</sup> Si (soil) in compare to control. Leaf proline accumulation was increased with rising salinity levels which maximized by 51% at RDF + K<sub>30</sub> (35 kg ha<sup>−1</sup> K) + 60 kg ha<sup>−1</sup> Si (soil) followed by 43% increase at RDF + K<sub>30</sub> (35 kg ha<sup>−1</sup> K) + Si (foliar) over control at 12 dS m<sup>−1</sup> salinity level. Enhanced fruit yield was observed with various Si and K fertilization combinations, where RDF + K<sub>30</sub> (35 kg ha<sup>−1</sup> K) + 60 kg ha<sup>−1</sup> Si (soil) shown a 62% and 40% higher yield in compare to control at 9 and 12 dS m<sup>−1</sup> salinity levels, respectively. Collectively, incorporating Si and K with standard fertilizer demonstrated synergistic effects, to mitigate the adverse impacts of salt stress through up-regulating root-shoot morphological traits, physio-biochemical attributes and fruit yield of bell pepper.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":776,"journal":{"name":"Silicon","volume":"17 2","pages":"377 - 390"},"PeriodicalIF":2.8,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Silicon (Ca, K & Mg) Induced Resistance in Two Contrasting Rice Genotypes Against Phloem Feeding Pest, Brown Planthopper, Nilaparvata lugens (Stal.) through Modulation of Defense Responses 硅(Ca, K和Mg)通过调节防御反应诱导两种不同基因型水稻对韧皮部取食害虫褐飞虱和褐飞虱的抗性
IF 2.8 3区 材料科学
Silicon Pub Date : 2024-12-04 DOI: 10.1007/s12633-024-03203-5
Prajna Pati, Swarnali Bhattacharya, Priyadarshini Sanghamitra, Raghu Shivappa, S. P. Monalisa, Nitiprasad Jambhulkar, Tapamay Dhar, Mayabini Jena
{"title":"Silicon (Ca, K & Mg) Induced Resistance in Two Contrasting Rice Genotypes Against Phloem Feeding Pest, Brown Planthopper, Nilaparvata lugens (Stal.) through Modulation of Defense Responses","authors":"Prajna Pati,&nbsp;Swarnali Bhattacharya,&nbsp;Priyadarshini Sanghamitra,&nbsp;Raghu Shivappa,&nbsp;S. P. Monalisa,&nbsp;Nitiprasad Jambhulkar,&nbsp;Tapamay Dhar,&nbsp;Mayabini Jena","doi":"10.1007/s12633-024-03203-5","DOIUrl":"10.1007/s12633-024-03203-5","url":null,"abstract":"<div><p>Rice crop is often attacked by several insect pests during its growth stages. Brown planthopper, BPH, is the most serious pest of rice which can cause epidemic losses. Though deployment of durable resistant variety is the safest and economic method of management, the breakdown of resistance is commonly being observed in several cases forcing farmers to use chemical pesticides. Under the negative effects of these chemical pesticides, Silicon provides a promising option as it is beneficial to plants, in alleviating the biotic and abiotic stress by imparting resistance. In the present investigation, attempt was made to manage the pest using different sources of Silicon mainly, Ca<sub>2</sub>SiO<sub>4</sub>, KSiO<sub>3</sub> and MgSiO<sub>3</sub>. All the three forms of Si were applied as seed priming and soil application at 50 and 100 mg/kg of soil. The results showed that, application of Silicon sources enhanced plant growth promoting traits like germination (7–11.50%), seedling length (29.62–45.42%), seedling vigor (35.25–53.28%), seedling weight (33.57–56.19%), number of tillers (40.66–54.79%), number of grains (12.77–20.69%) and grain yield (32.20–49.67%). Significant reduction in pest incidence was recorded evidenced by lowest nymphs settled/plant, lowest nymphal survival, lowest fecundity, increased developmental period, lowest feeding area, maximum probing marks, lowest Functional Plant Loss Index and lowest percent wilted plants. Similarly, enhanced activities of Peroxidase, Polyphenol oxidase, Catalase and Super oxide dismutase were recorded in Silicon treated plants. Proteomic analysis using SDS-PAGE clearly produced thick bands at 43, 66 and 97.40 kDa range in all the Silicon treated plants. Among the Silicon sources, it was Potassium silicate performed better compared to Ca and Mg silicates. The results of the present investigation provided additional insights into the Induced Systemic Resistance activities of the Silicon sources in two contrasting genotypes and provided clues for the researchers to formulate suitable eco-friendly management measures.</p></div>","PeriodicalId":776,"journal":{"name":"Silicon","volume":"17 2","pages":"347 - 360"},"PeriodicalIF":2.8,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Aluminium Induced Formation of Silicon Microrods from Nanosilicon via Gas Phase Transportation 铝诱导气相输运纳米硅形成硅微棒
IF 2.8 3区 材料科学
Silicon Pub Date : 2024-11-27 DOI: 10.1007/s12633-024-03199-y
Alexander A. Vinokurov, Ekaterina A. Iasnikova, Vadim B. Platonov, Valeriy Yu. Verchenko, Nikolay N. Kononov, Sergey G. Dorofeev
{"title":"Aluminium Induced Formation of Silicon Microrods from Nanosilicon via Gas Phase Transportation","authors":"Alexander A. Vinokurov,&nbsp;Ekaterina A. Iasnikova,&nbsp;Vadim B. Platonov,&nbsp;Valeriy Yu. Verchenko,&nbsp;Nikolay N. Kononov,&nbsp;Sergey G. Dorofeev","doi":"10.1007/s12633-024-03199-y","DOIUrl":"10.1007/s12633-024-03199-y","url":null,"abstract":"<div><p>The trend towards miniaturization of electrical engineering creates a need to study the properties of not only bulk silicon, but also nanoparticles based on it. Silicon nanoparticles and microrods have various interesting electrical properties, which can be used in the creation of microelectronic devices. The article describes the technique which leads to recrystallization of nanosilicon into extended microrods with silicon transfer via vapor upon annealing in the presence of aluminum precursors AlCl<sub>3</sub> or Al + AlCl<sub>3</sub>. The morphology of and structure of microrods were studied by both optical and scanning electron microscopy, Raman spectroscopy, XRD, EDX methods. The microrods have a diameter of 0.5–2 μm, length up to 3000–5000 μm, are characterized by a cubic crystal structure, and have p-type conductivity. The current–voltage characteristics of the microrods have been studied, the heights of the metal–semiconductor barriers have been determined, and the temperature dependences of the conductivity have been obtained. The conductivity of the microrods increases significantly in air or in the presence of the oxidizing gas NO<sub>2</sub>. The sensory response to NO<sub>2</sub> in the dark and under UV irradiation at room temperature has been studied. Photosensitivity is also observed: under IR laser irradiation, the conductivity increases by 2 orders of magnitude. To conclude, we present a convenient method for obtaining silicon microrods with interesting electrical and sensing properties which are promising for use in microelectronics.</p></div>","PeriodicalId":776,"journal":{"name":"Silicon","volume":"17 2","pages":"335 - 345"},"PeriodicalIF":2.8,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Theoretical Insight on the Structural, Electronic, Elastic, Optical and Vibrational Properties of Ligasi Half-Heusler Crystal for Ground State and Under Pressure 李加西半赫斯勒晶体在基态和压力下的结构、电子、弹性、光学和振动特性的理论认识
IF 2.8 3区 材料科学
Silicon Pub Date : 2024-11-23 DOI: 10.1007/s12633-024-03200-8
Sinem Erden Gulebaglan, Emel Kilit Dogan
{"title":"Theoretical Insight on the Structural, Electronic, Elastic, Optical and Vibrational Properties of Ligasi Half-Heusler Crystal for Ground State and Under Pressure","authors":"Sinem Erden Gulebaglan,&nbsp;Emel Kilit Dogan","doi":"10.1007/s12633-024-03200-8","DOIUrl":"10.1007/s12633-024-03200-8","url":null,"abstract":"<div><p>In this study, the electronic, structural, optical, elastic and dynamic properties of LiGaSi half- Heusler crystalline were tried to be predicted for the ground state and under pressure by using density functional theory. Quantum Espresso and Abinit software programs were used while carrying out this research. While performing calculations in these package programmings, the Generalized Gradient Approximation was taken into consideration. Calculations showed that the critical pressure value for LiGaSi half-Heusler crystal is estimated to be approximately 935 kbar. It was noticed that the LiGaSi half-Heusler crystal, while a brittle material in the ground state, became an elastic material under pressure. Additionally, it was concluded that while LiGaSi half-Heusler crystal is dynamically stable in the ground state, LiGaSi half-Heusler is dynamically unstable under 935 kbar pressure. This has additionally been shown to make it more thermally conductive. It is thought that the results obtained from this study and the information obtained by interpreting the results will contribute to the literature and will be useful for future studies.</p></div>","PeriodicalId":776,"journal":{"name":"Silicon","volume":"17 2","pages":"323 - 334"},"PeriodicalIF":2.8,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Effect of K2CO3 on the SiC Formation by Carbothermal Reduction of Chamotte K2CO3对Chamotte碳热还原生成SiC的影响
IF 2.8 3区 材料科学
Silicon Pub Date : 2024-11-23 DOI: 10.1007/s12633-024-03186-3
Zeyneb Chermat, Kamel Loucif, Assia Belbali
{"title":"The Effect of K2CO3 on the SiC Formation by Carbothermal Reduction of Chamotte","authors":"Zeyneb Chermat,&nbsp;Kamel Loucif,&nbsp;Assia Belbali","doi":"10.1007/s12633-024-03186-3","DOIUrl":"10.1007/s12633-024-03186-3","url":null,"abstract":"<div><p>The enhancement of mechanical or physicochemical properties in kaolinitic ceramics has often been achieved through the nature and volumetric fraction of their constituent phases. Free silica in these ceramics contributes to a decrease in creep resistance. Therefore, improving their properties is contingent upon controlling free silica. The objective of this study is to enhance the mechanical properties of kaolinitic ceramics through the transformation of silica to form silicon carbide. This transformation is based on the carbothermal reaction. The work methodology involves the addition of active carbon and potassium carbonate to chamotte to ensure optimal reactivity between carbon and silica at high temperatures. Various techniques were used, including mechanical tests, physical measurements, X-ray diffraction (XRD) and scanning electron microscopy (SEM). Researchers have highlighted the carbothermal reaction at temperatures ranging from 1300 to 1500 °C. Through SEM observations and XRD analysis, we have demonstrated the formation of silicon carbide in fibre form, leading to an increase in mechanical strength. The addition of K<sub>2</sub>CO<sub>3</sub> lowers the temperature of silicon carbide formation. These transformations significantly affect shrinkage but not apparent density or porosity due to the interplay of conflicting phenomena.</p></div>","PeriodicalId":776,"journal":{"name":"Silicon","volume":"17 2","pages":"311 - 321"},"PeriodicalIF":2.8,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Z-slotted Silicon Dioxide Based Tunable Polarization Converter Design Using Graphene-VO2 Composite for Detection of Cancer 基于石墨烯- vo2复合材料的z缝二氧化硅可调谐偏振变换器的癌症检测设计
IF 2.8 3区 材料科学
Silicon Pub Date : 2024-11-21 DOI: 10.1007/s12633-024-03198-z
Priyanka Das, Keertana Sarvani Chilakapati
{"title":"Z-slotted Silicon Dioxide Based Tunable Polarization Converter Design Using Graphene-VO2 Composite for Detection of Cancer","authors":"Priyanka Das,&nbsp;Keertana Sarvani Chilakapati","doi":"10.1007/s12633-024-03198-z","DOIUrl":"10.1007/s12633-024-03198-z","url":null,"abstract":"<div><p>The terahertz (THz) band can be deployed for label-free detection of malignant cells by using a cross-polarization converter sensor based on metasurfaces. Here, a metamaterial-based polarization converter is designed which can be tuned by varying the chemical potential of graphene. Dual band circular polarized (CP) waves are generated by an asymmetric Z-slotted graphene patch on a silicon dioxide constituted substrate. A Z-shaped conductor made of vanadium dioxide (VO<sub>2</sub>) is added in the slot to convert the metasurface from a CP converter into a cross-polarization converter. Optimizations in the design have been performed using Actor-Critic method with A3C (Asynchronous Actor-Critic Agents), which is a type of reinforcement learning algorithm. The apparatus is engineered to function based on the idea of refractive index (RI) sensing, which involves detecting the frequency shift of the maximum polarization conversion peak in the presence of the target compound. Insulator to metallic phase conversion of VO<sub>2</sub> alters its dielectric properties like permittivity and conductivity due to variation of the anatomy of electron orbitals. By increasing the temperature of VO<sub>2</sub>, tunability in polarization conversion can be achieved due to its phase transition. Two degrees of freedom are thus present for tunability in polarization conversion. The change in maximum polarization conversion frequency is proportional to the RI difference between malignant and healthy cells. Peak sensitivity of the proposed metasurface is 420 GHz/RIU with maximum polarization conversion efficiency 98.3%. Finite integration based numerical simulations have been used to investigate the operating principle of the proposed polarization converter.</p></div>","PeriodicalId":776,"journal":{"name":"Silicon","volume":"17 2","pages":"293 - 309"},"PeriodicalIF":2.8,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of Alkali-silane Surface-Grafted Pineapple Fiber on Lamina Delamination & Drilling Damage Behaviour of Hot-Water Ageing Composites 碱硅烷表面接枝菠萝纤维对热水老化复合材料分层和钻孔损伤行为的影响
IF 2.8 3区 材料科学
Silicon Pub Date : 2024-11-20 DOI: 10.1007/s12633-024-03152-z
R. Meby Selvaraj, K Pratheesh, Ramesh Kumar C, Arul Jothi G
{"title":"Effects of Alkali-silane Surface-Grafted Pineapple Fiber on Lamina Delamination & Drilling Damage Behaviour of Hot-Water Ageing Composites","authors":"R. Meby Selvaraj,&nbsp;K Pratheesh,&nbsp;Ramesh Kumar C,&nbsp;Arul Jothi G","doi":"10.1007/s12633-024-03152-z","DOIUrl":"10.1007/s12633-024-03152-z","url":null,"abstract":"<div><p>The composite material utilization is kept increasing in recent decades, due to their less dense, durable, and significant physical, chemical and mechanical properties. The present research study aims to investigate the delamination and drilling studies effects of alkali-silane treated pineapple fiber under varying ageing condition. The fiber under alkali and silane treatment provides better machining, mechanical and bonding strength even after ageing condition, which brings an novelty to this study. By using NaOH solution and silane solution (3-Aminotrimethoxy silane) the alkali and silane treatment are carried out on fiber surface. After surface modification, the composite are fabricated using hand layup method. For understanding how the delamination effects are occurred on composite, are assessed by treating the composite laminates under hot water ageing for a period of 30 days. The drilling studies, mechanical load bearing studies are carried out as per the ASTM standard. The study analysis reported that the composite under N1 specimen, aged in tap water at 50 °C for 30 days, showed remarkable retention of its mechanical properties, with an Interlaminar shear strength (ILSS) of 23.94 MPa and a V-Notch shear strength of 20.81 MPa, as well as excellent fatigue resistance of 21,012 cycles at 25% UTS, 19,260 cycles at 50% UTS, and 18,141 cycles at 75% UTS when compared to other composite material. Furthermore, N1 composite demonstrates improved creep strain values of 0.021 at 5000 s, 0.037 at 10,000 s, and 0.152 at 15,000 s, indicating strong resistance to time-dependent deformation. Based on the research analysis, the reduced delamination and improved mechanical, machining properties are established on the composite material, which could be applied in areas like automotive, aviation, interior works on housing and infrastructural applications, sports equipment and other domains, etc.</p></div>","PeriodicalId":776,"journal":{"name":"Silicon","volume":"17 2","pages":"279 - 291"},"PeriodicalIF":2.8,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An Ultrasensitive Temperature Sensor in 1550 nm Communication Band Based on MoO2 Coated Microstructured Optical Fiber 基于MoO2涂层微结构光纤的1550nm通信波段超灵敏温度传感器
IF 2.8 3区 材料科学
Silicon Pub Date : 2024-11-19 DOI: 10.1007/s12633-024-03196-1
Jiyu Dong, Shuhuan Zhang, Min Peng, Hongwei Zhu, Ying Yang, Yufan Sun, Jingqi Zhang
{"title":"An Ultrasensitive Temperature Sensor in 1550 nm Communication Band Based on MoO2 Coated Microstructured Optical Fiber","authors":"Jiyu Dong,&nbsp;Shuhuan Zhang,&nbsp;Min Peng,&nbsp;Hongwei Zhu,&nbsp;Ying Yang,&nbsp;Yufan Sun,&nbsp;Jingqi Zhang","doi":"10.1007/s12633-024-03196-1","DOIUrl":"10.1007/s12633-024-03196-1","url":null,"abstract":"<div><p>In this paper, the 2D material MoO<sub>2</sub> is innovatively chosen to replace traditional precious metals such as Au and Ag as the plasmonically excited material, and for the first time, it is combined with the extreme thermal optical material polydimethylsiloxane (PDMS). A D-type microstructured fiber is used as the optical information transmission medium and open sensing channel, and a surface plasmon resonance (SPR) effect based M<sub>O</sub>O<sub>2</sub> coated D-type microstructured fiber temperature sensor is constructed. The simulation results show that the temperature detection range of the proposed optical fiber sensor is 30℃ ~ 80℃, and the sensing range of resonance wavelength is near the communication band of 1550 nm. The sensor is very sensitive to temperature variations, in particular the average wavelength sensitivity is up to 9.217 nm/°C in the x-polarized direction and 9.443 nm/°C in the y-polarized direction. This means that the sensor can accurately measure small changes in ambient temperature and respond quickly to ensure stable system operation. Therefore, MoO<sub>2</sub> as a plasmonic sensing material and PDMS as a temperature sensing material have great potential for fiber sensing applications.</p></div>","PeriodicalId":776,"journal":{"name":"Silicon","volume":"17 2","pages":"267 - 277"},"PeriodicalIF":2.8,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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