Micro & Nano Letters最新文献_第6页

Biosynthesis of ZnO.Ag2O3 using aqueous extract of Haplophyllum obtusifolium: Characterization and cell toxicity activity against liver carcinoma cells 利用钝叶单叶藻水提取物生物合成ZnO.Ag2O3：特性和对肝癌细胞的细胞毒性

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-06-25 DOI: 10.1049/mna2.12170

Majid Halimi Khalil Abad, Mohabat Nadaf, Mohammad Ehsan Taghavizadeh Yazdi

{"title":"Biosynthesis of ZnO.Ag2O3 using aqueous extract of Haplophyllum obtusifolium: Characterization and cell toxicity activity against liver carcinoma cells","authors":"Majid Halimi Khalil Abad, Mohabat Nadaf, Mohammad Ehsan Taghavizadeh Yazdi","doi":"10.1049/mna2.12170","DOIUrl":"https://doi.org/10.1049/mna2.12170","url":null,"abstract":"The zinc oxide-silver oxide nanocomposite (ZnO.Ag2O3 particles) was prepared by using an aqueous plant extract of Haplophyllum obtusifolium for the first time. Powder X-ray diffraction (PXRD), Fourier transforms spectroscopy (FTIR), field emission microscopy (FESEM), energy dispersive X-ray analysis (EDX), and transmission electron microscopy (TEM) were applied to analyze the structure, functional groups, morphology, and purity of the prepared nanocomposite. PXRD revealed the formulation of ZnO.Ag2O3 for the particles. The investigation of functional groups has demonstrated the presence of some carbonated impurities along with absorbed water in the composition of the ZnO.Ag2O3 nanocomposite. Morphologically, particles have formed a petal-like shape with different sizes. The EDX analysis also confirmed the composition of the prepared sample and the presence of 4.78% silver in the formula. Additionally, the TEM analysis revealed spherical and rectangular shapes with a particle size of 80.43 ± 46.73 nm. Moreover, the ZnO.Ag2O3 particles were used against cancer cells, which has shown synthesized NCs have a toxic effect against liver cancer cells in a concentration and time-dependent manner.","PeriodicalId":18398,"journal":{"name":"Micro & Nano Letters","volume":"18 6","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mna2.12170","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50143600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Selective Hydrodeoxygenation of Guaiacol to Cyclohexane over Ru-Catalysts Based on MFI Nanosheets 基于MFI纳米片的钌催化剂上愈创木酚选择性加氢脱氧制环己烷

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-06-20 DOI: 10.3390/micro3020042

Dmitry E. Tsaplin, A. Sadovnikov, D. Ramazanov, D. Gorbunov, Valeriya Ryleeva, A. Maximov, Kaige Wang, E. Naranov

引用次数: 0

F2 Laser-Induced Micro-Reticulated Structural Changes of Amorphous Carbon Thin Films 激光诱导非晶碳薄膜微网状结构的变化

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-06-16 DOI: 10.3390/micro3020041

M. Okoshi

{"title":"F2 Laser-Induced Micro-Reticulated Structural Changes of Amorphous Carbon Thin Films","authors":"M. Okoshi","doi":"10.3390/micro3020041","DOIUrl":"https://doi.org/10.3390/micro3020041","url":null,"abstract":"Micro/nanoprocessing of materials using lasers is currently an active research topic. In that research, the choice of the laser to be used is critical, but the F2 laser, which has the shortest wavelength (157 nm) among commercially available lasers, has few research compared to its potential. In this paper, we discovered a new photochemical processing by using an F2 laser to irradiate an amorphous carbon thin film. The short wavelength and high photon energy of the F2 laser can photoexcite the surface of the thin film at high density and generate active oxygen atoms O(1D) by photodecomposition of atmospheric oxygen molecules. As a result, the optical change of the amorphous carbon thin film was induced without thickness reduction, and a micron-sized network-like, reticulated structural change was formed in the thin film surface after one month at the latest. The formed micron-sized reticulated structure was relatively swollen, and a graphitization occurred in the structure, observed by Raman spectroscopy. However, the structure was not observed when the laser irradiated area became smaller. This work has made it possible to form a micron-sized reticulated structure including carbon nanocrystals in an amorphous carbon, which is expected to further expand the applications of carbon materials.","PeriodicalId":18398,"journal":{"name":"Micro & Nano Letters","volume":"57 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77699023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Three novel iridium (III) complexes containing double chiral atoms for organic light-emitting diodes 三种用于有机发光二极管的新型双手性铱（III）配合物

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-06-12 DOI: 10.1049/mna2.12169

Gan Cheng, Jun-jian Lu, Li-Ya Zhu, Guangzhao Lu

{"title":"Three novel iridium (III) complexes containing double chiral atoms for organic light-emitting diodes","authors":"Gan Cheng, Jun-jian Lu, Li-Ya Zhu, Guangzhao Lu","doi":"10.1049/mna2.12169","DOIUrl":"https://doi.org/10.1049/mna2.12169","url":null,"abstract":"Chiral iridium (III) complexes are very important for the preparation of circularly polarized organic diodes light-emitting diodes (CP-OLEDs). Three novel iridium (III) complexes, Ir(dnfppy)2(Cl/pyrrole), Ir(dfppy)2(dpp), and Ir(tfmqz)2(sdpp), have been synthesized and characterized, respectively. These iridium (III) complexes emitted deep-blue, blue, and red photoluminescence with high quantum yields (Ir(dnfppy)2(Cl/Pyrrole): λmax = 447 nm, F = 62.4%; Ir(dfppy)2(dpp): λmax = 467 nm, F = 25%; Ir(tfmqz)2(sdpp): λmax = 609 nm, F = 73.7%). Compared with Ir(dnfppy)2(Cl/pyrrole), the HOMO energy levels of Ir(dfppy)2(dpp) and Ir(tfmqz)2(sdpp) were calculated to be −5.71/−5.73 eV, and the LUMO energy levels were increased to be −2.75/−3.36 eV, respectively. The circular dichroism spectra of two pairs of the enantiomers for Ir(dfppy)2(dpp) or Ir(tfmqz)2(sdpp) displayed symmetry with opposite polarization between 300 and 600 nm. The maximum external quantum efficiency (EQEmax) of OLEDs based on Ir(tfmpqz)2(sddp) was 13.8%, showing a relatively low efficiency roll-off with the EQE of 10.7% at 5000 cd/m2.","PeriodicalId":18398,"journal":{"name":"Micro & Nano Letters","volume":"18 6","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mna2.12169","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50130105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sacrificial Doping as an Approach to Controlling the Energy Properties of Adsorption Sites in Gas-Sensitive ZnO Nanowires 牺牲掺杂作为控制气敏ZnO纳米线中吸附位点能量特性的方法

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-06-01 DOI: 10.3390/micro3020040

S. Nalimova, Z. Shomakhov, A. Bobkov, V. Moshnikov

{"title":"Sacrificial Doping as an Approach to Controlling the Energy Properties of Adsorption Sites in Gas-Sensitive ZnO Nanowires","authors":"S. Nalimova, Z. Shomakhov, A. Bobkov, V. Moshnikov","doi":"10.3390/micro3020040","DOIUrl":"https://doi.org/10.3390/micro3020040","url":null,"abstract":"Currently, devices for environmental gas analyses are required in many areas of application. Among such devices, semiconductor-resistive gas sensors differ advantageously. However, their characteristics need further improvement. The development of methods for controlling the surface properties of nanostructured metal oxides for their use as gas sensors is of great interest. In this paper, a method involving the sacrificial doping of ZnO nanowires to control the content of their surface defects (oxygen vacancies) was proposed. Zinc oxide nanowires were synthesized using the hydrothermal method with sodium iodide or bromide as an additional precursor. The surface composition was studied using X-ray photoelectron spectroscopy. The sensor properties of the isopropyl alcohol vapors at 150 °C were studied. It was shown that a higher concentration of oxygen vacancies/hydroxyl groups was observed on the surfaces of the samples synthesized with the addition of iodine and bromine precursors compared to the pure zinc oxide nanowires. It was also found out that these samples were more sensitive to isopropyl alcohol vapors. A model was proposed to explain the appearance of additional oxygen vacancies in the subsurface layer of the zinc oxide nanowires when sodium iodide or sodium bromide was added to the initial solution. The roles of oxygen vacancies and surface hydroxyl groups in providing the samples with an increased sensitivity were explained. Thus, a method involving the sacrificial doping of zinc oxide nanowires has been developed, which led to an improvement in their gas sensor characteristics due to an increase in the concentration of oxygen vacancies on their surface. The results are promising for percolation gas sensors equipped with additional water vapor traps that work stably in a high humidity.","PeriodicalId":18398,"journal":{"name":"Micro & Nano Letters","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82105071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

A Novel Approach of Polyethylene Glycol-4000 Hydrogels as Controlled Drug Carriers 聚乙二醇-4000水凝胶作为受控药物载体的新方法

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-06-01 DOI: 10.3390/micro3020039

M. Suhail, Iain H Chiu, I-Ling Lin, M. Tsai, Pao-chu Wu

引用次数: 0

Pressure-Driven Sample Flow through an Electrospun Membrane Increases the Analyte Adsorption 压力驱动的样品流通过静电纺丝膜增加了分析物的吸附

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-05-26 DOI: 10.3390/micro3020038

A. Maslakova, K. Prusakov, Anastasia Sidorova, E. Pavlova, A. Ramonova, D. Bagrov

{"title":"Pressure-Driven Sample Flow through an Electrospun Membrane Increases the Analyte Adsorption","authors":"A. Maslakova, K. Prusakov, Anastasia Sidorova, E. Pavlova, A. Ramonova, D. Bagrov","doi":"10.3390/micro3020038","DOIUrl":"https://doi.org/10.3390/micro3020038","url":null,"abstract":"Electrospun polymer membranes are regarded as prospective biosensor components due to their large specific surface area and diverse opportunities for chemical modifications. However, their intricate porous structure can impede diffusion and render some analyte-binding sites inaccessible. To overcome these diffusion limitations and improve analyte adsorption onto the polymer, a pressure-driven sample flow through the membrane can be employed. To date, the efficiency of pressure-driven analyte delivery into these membranes has not been quantified. Here, we compare forced flow and passive sample diffusion through poly(dioxanone) electrospun membranes. We examine two model analytes, BSA and interleukin-1 beta (IL1b), to address both non-specific and specific binding. Following exposure of the membranes to the test solutions, we measured the residual concentrations of the analytes using fluorometry and enzyme-linked immunosorbent assay (ELISA) techniques. The pressure-driven sample loading was superior to passive diffusion, with a 2.8–11.5-fold change for physical adsorption and a 2.4–3.4-fold difference for specific binding. Our data can be useful for the development of immunoassays and microfluidic devices.","PeriodicalId":18398,"journal":{"name":"Micro & Nano Letters","volume":"2 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72820232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Numerical simulation using in the preparation process of micron-sized silica–aluminium composite powders by high-energy alloying: Building visualisation and guiding preparation 高能合金化制备微米级硅铝复合粉末过程中的数值模拟：构建可视化和指导制备

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-05-24 DOI: 10.1049/mna2.12165

Zhen-yu Guo, Xin Zhang, Yan-jun Wang, Si-yuan Zhang, Yin Yin

{"title":"Numerical simulation using in the preparation process of micron-sized silica–aluminium composite powders by high-energy alloying: Building visualisation and guiding preparation","authors":"Zhen-yu Guo, Xin Zhang, Yan-jun Wang, Si-yuan Zhang, Yin Yin","doi":"10.1049/mna2.12165","DOIUrl":"https://doi.org/10.1049/mna2.12165","url":null,"abstract":"Silica-aluminium composite powders are important precursors for the preparation of sealant coatings by supersonic flame spraying. Micron-scale silica-aluminium composite powders can be prepared using a planetary ball mill, but powder agglomeration often leads to composite failure. Using relevant modelling software to build the 3D modelling of the ball mill jar, which based on the discrete element method, using the Hertz–Mindlin contact model and after specifying the simulation boundary conditions, the ball mill process was simulated and analysed. Visualise the influence of important process parameters such as frequency, size and diameter of milling balls and ball-to-powder weight ratio, and systematically analyse the microscopic morphology and composite condition of the agglomerated and dispersed powders. The results show that the ball motion during the ball milling process is mainly divided into three representative types: ball–ball impact, ball crushing motion against the jar wall and ball–wall impact. The energy transfer efficiency of the milling balls to the powder system is highest when the ratio of the three types of motion is uniform. SEM images and EDS spectra showed that the aluminium powder was sufficiently crushed, with an average particle size below 1 μm. The aluminium powder was uniformly distributed on the surface of the silicon powder, and the particle size of the composite silicon aggregates was sufficiently reduced.","PeriodicalId":18398,"journal":{"name":"Micro & Nano Letters","volume":"18 5","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mna2.12165","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50143214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A biodegradable nano-composite membrane for high-safety and durable lithium-ion batteries 一种用于高安全性和耐用锂离子电池的可生物降解纳米复合膜

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-05-22 DOI: 10.1049/mna2.12168

Ting Wang, Na Liu, Hui Zhou, Ming-Jun Chen

{"title":"A biodegradable nano-composite membrane for high-safety and durable lithium-ion batteries","authors":"Ting Wang, Na Liu, Hui Zhou, Ming-Jun Chen","doi":"10.1049/mna2.12168","DOIUrl":"https://doi.org/10.1049/mna2.12168","url":null,"abstract":"As a key component of lithium-ion batteries (LIBs), separator plays a crucial role in the performance and safety of LIBs. In this paper, a cellulose-based porous membrane modified by nano CaCO3 is prepared conveniently by electrospinning. The membrane exhibits rich fibrous porous networks and uniform distribution of nanoparticles. Strengthened by CaCO3, the tensile strength of the cellulose porous membrane elevates from 4.7 ± 0.4 MPa to 7.7 ± 0.7 MPa. Besides, the modified membranes possess improved thermal stability and can maintain their original size after treatment at 150°C and 180°C. Also, the electrolyte uptake of cellulose/CaCO3 membrane is 73% higher than that of the pure cellulose membrane. Thus, the ionic conductivity of membrane achieves 1.08 mS cm−1 and the electrochemical window is about 4.8 V, which meets the practical requirements of LIBs. Significantly, with LiFePO4/Li battery this membrane can run for 230 cycles with a capacity retention of 97.4% and a discharge capacity of 149.0 mAh g−1, demonstrating the huge potential for high safety and next-generation LIBs.","PeriodicalId":18398,"journal":{"name":"Micro & Nano Letters","volume":"18 5","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mna2.12168","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50153379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Regulating properties of Cu2ZnSn(S, Se)4 absorber layer via the extra tiny Mg2+ 超细Mg2对Cu2ZnSn（S，Se）4吸收层性能的调控+

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-05-20 DOI: 10.1049/mna2.12166

Mingyang Cao, Junting Ren, Yanchun Yang, Guonan Cui, Xin Zhao, Yanqing Liu, Yajin Mi, Xiao Tian, Chengjun Zhu

引用次数: 0