Micro & Nano Letters最新文献_第7页

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

Probing Italy: A Scanning Probe Microscopy Storyline 探索意大利:扫描探针显微镜的故事情节

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-05-18 DOI: 10.3390/micro3020037

F. Dinelli, M. Brucale, F. Valle, C. Ascoli, B. Samorì, M. Sartore, M. Adami, Riccardo Galletti, S. Prato, B. Troian, C. Albonetti

{"title":"Probing Italy: A Scanning Probe Microscopy Storyline","authors":"F. Dinelli, M. Brucale, F. Valle, C. Ascoli, B. Samorì, M. Sartore, M. Adami, Riccardo Galletti, S. Prato, B. Troian, C. Albonetti","doi":"10.3390/micro3020037","DOIUrl":"https://doi.org/10.3390/micro3020037","url":null,"abstract":"Starting from the late 1980’s, scanning probe microscopy has progressively diffused in Italy until today. In this paper, we provide a brief account of the main historical events and a current picture of the distribution of the active groups. A survey was prepared by LimeSurvey, made of six sections asking for personal and institutional data, human resources, equipment available, fields of interest, research projects, educational/dissemination activities, and two relevant publications in the last six years. It turns out that the Italian community includes more than seventy groups and two companies. It is widely diffused, although mostly concentrated near large academic and research institutions, often in locations where prominent Italian researchers have operated. This community is active in many scientific fields and can produce research of high international quality. It shows a wide competence, as proven by the list of research works published in journals ranked within the top 20% class. The diffusion of SPM microscopes in industry is still sporadic, possibly due to extensive collaborations between the research institutions and industries themselves. The authors hope that this work might be useful to the community and beyond, and that it might stimulate the formation of a more structured network.","PeriodicalId":18398,"journal":{"name":"Micro & Nano Letters","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87474430","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

Proposal for a spin logic device based on magneto-electric effect and spin Hall effect 基于磁电效应和自旋霍尔效应的自旋逻辑器件的提出

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-05-18 DOI: 10.1049/mna2.12164

Sen Wang, Xue Zou, Henan Li, Dan Shan, Hongliang Fan

引用次数: 0

Controllable synthesis of indium oxide nanorod-flowers for high field emission performance 可控合成高场发射性能的氧化铟纳米棒花

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-05-18 DOI: 10.1049/mna2.12163

Yuechuan Hu, Hange Feng, Lingwei Li, Menghao Luo, Zibo Dong, Shaolin Xue

{"title":"Controllable synthesis of indium oxide nanorod-flowers for high field emission performance","authors":"Yuechuan Hu, Hange Feng, Lingwei Li, Menghao Luo, Zibo Dong, Shaolin Xue","doi":"10.1049/mna2.12163","DOIUrl":"https://doi.org/10.1049/mna2.12163","url":null,"abstract":"In this paper, indium oxide (In2O3) nanomaterials are successfully synthesized on the silicon substrates by hydrothermal method and calcination. By changing the ratio of raw materials, In2O3 exhibits three morphologies of nanorods, nanomaces, and nanorod-flowers. Among the three morphologies of In2O3 nanomaterials, the nanorod-flowers shaped In2O3 shows a strong field emission property, the turn-on electric field as low as 0.97 V/µm and the field enhancement factor β up to 1053. The excellent performance is attributed to the higher length to diameter (L/D) ratio of the emitting tips and the better crystal quality for nanorod-flowers shaped In2O3. The authors also show that for the nanorod-flowers shaped In2O3, increasing separation distance, the turn-on electric field increases up to about 3.67 V/µm and β decreases to 573 at d = 900 µm. This work provides new insights to design and synthesize nanomaterials with excellent field emission properties.","PeriodicalId":18398,"journal":{"name":"Micro & Nano Letters","volume":"18 5","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mna2.12163","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50136837","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

Low-Cost Three-Dimensionally -Printed Inverted Plug and Play Optical Instrument for Microfluidic Imaging 用于微流体成像的低成本三维印刷倒置即插即用光学仪器

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-05-16 DOI: 10.3390/micro3020036

Denislav Markov, Emil Grigorov, B. Kirov, J. Denev, V. Galabov, M. Marinov

{"title":"Low-Cost Three-Dimensionally -Printed Inverted Plug and Play Optical Instrument for Microfluidic Imaging","authors":"Denislav Markov, Emil Grigorov, B. Kirov, J. Denev, V. Galabov, M. Marinov","doi":"10.3390/micro3020036","DOIUrl":"https://doi.org/10.3390/micro3020036","url":null,"abstract":"Microfluidics, also known as lab-on-a-chip or micro total analysis systems, can precisely regulate and manipulate micro-sized fluids. They have great potential in biology, chemistry, and medicine, as well as other fields of science. By definition, microfluidic devices operate with small-volume samples and small reactant quantities, which renders them both efficient and affordable. However, such small objects have very demanding requirements for the utilized optical detection system. Due to the specifics of those devices, monitoring the results of experiments is carried out with commercial inverted optical microscopes. Unfortunately, that type of optical device is still expensive. In this article, we present a truly functional, inexpensive, standalone, three-dimensionally printed, and inverted microscope, including the design, engineering, and manufacturing process and some of the experiments that have been conducted with it. Finally, we summarize the advantages of this three-dimensionally printed microscope (including the total fabrication costs) and the future improvements that will be introduced to it.","PeriodicalId":18398,"journal":{"name":"Micro & Nano Letters","volume":"53 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80471119","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