Micro & Nano Letters最新文献_第4页

Squeeze-film damping model of perforated plate considering border effect 考虑边界效应的穿孔板挤压薄膜阻尼模型

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-12-20 DOI: 10.1049/mna2.12185

Cunhao Lu, Zeyuan Zhang, Wei Liu, Jian Chen

引用次数: 0

Characterization and application of lamellar zeolite-X prepared from kaolin 高岭土制备的片状沸石-X 的表征和应用

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-12-20 DOI: 10.1049/mna2.12182

Weilin Jia, Suyang Wang, Yingying Deng, Jie Shen, Ping Zhao, Zepeng Wang, Jiaojing Shao, Yuanyu Wang, Qi Sun

{"title":"Characterization and application of lamellar zeolite-X prepared from kaolin","authors":"Weilin Jia, Suyang Wang, Yingying Deng, Jie Shen, Ping Zhao, Zepeng Wang, Jiaojing Shao, Yuanyu Wang, Qi Sun","doi":"10.1049/mna2.12182","DOIUrl":"10.1049/mna2.12182","url":null,"abstract":"A simple and effective method was reported for the rapid synthesis of zeolite X from kaolin by adding a template agent. The results of X-ray diffraction confirm the good crystallinity of the synthesized X-zeolite with lamellar structure. Transmission electron microscopy images clearly demonstrate the lamellar structure of the synthesized X-zeolite. The corresponding selective electron diffraction pattern suggests that the crystal structure of X-type zeolite is octahedral. The co-existence and uniform distribution of Si, Al, O, and Na in the layered structure of the synthesized X-type zeolite are detected by element mapping. In addition, N2 adsorption–desorption measurement indicates that the specific surface area of the lamellar zeolite X is 153.4625 m2 g−1. The micropore surface area is 148.8374 m2 g−1, and the micropore volume is 0.073377 m2 g−1. After exploring the influence of different temperatures on the adsorption of carbon dioxide, the research shows that two-dimensional zeolite X has the best adsorption capacity for carbon dioxide. The adsorption and separation performance of CO2/CH4 was investigated. The study showed that the adsorption and separation coefficient of two-dimensional zeolite X was the highest.","PeriodicalId":18398,"journal":{"name":"Micro & Nano Letters","volume":"19 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/mna2.12182","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138822563","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

The preparation of PVA/PBS/LiCl hydrogels and their performance as conductive gels PVA/PBS/LiCl水凝胶的制备及其导电性能

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-11-27 DOI: 10.1049/mna2.12181

Zheng Guo, Zebo Wang, Wei Pan

引用次数: 0

Optical gain of CdxZn1−xTe quantum dot structures CdxZn1−xTe量子点结构的光学增益

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-11-27 DOI: 10.1049/mna2.12180

Muwaffaq Abdullah, Baqer O. Al-Nashy, Amin H. Al-Khursan

引用次数: 0

Bio-fabrication of silver nanoparticles using an aqueous extract of Quercus baloot: Preparation, characterization and in vitro antimicrobial evaluation 用栓皮栎水提物制备纳米银:制备、表征和体外抗菌评价

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-11-08 DOI: 10.1049/mna2.12179

Fazle Rabbi, Amna Nisar, Noor Ul Ain Nawaz, Najla AlMasoud, Taghrid S. Alomar, Abdur Rauf

{"title":"Bio-fabrication of silver nanoparticles using an aqueous extract of Quercus baloot: Preparation, characterization and in vitro antimicrobial evaluation","authors":"Fazle Rabbi, Amna Nisar, Noor Ul Ain Nawaz, Najla AlMasoud, Taghrid S. Alomar, Abdur Rauf","doi":"10.1049/mna2.12179","DOIUrl":"10.1049/mna2.12179","url":null,"abstract":"\u0000In the current study, a novel method was used to synthesize silver nanoparticles (AgNPs) by utilizing Quercus baloot aqueous extract as a reducing agent. The biosynthesized AgNPs were then subjected to various physicochemical characterizations to assess their effectiveness against microbial familiarity. The characterization techniques included ultraviolet-visible spectro-photometry (UV-Vis), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffractometer (XRD), and Fourier-transform infrared spectroscopy (FTIR). The UV-Vis analysis revealed a distinctive spectral peak at 420 nm, indicating the presence of silver nanoparticles. SEM imaging displayed the nanoparticle size range of about 100 nm at a magnification of 30,000x, while TEM demonstrated that the nanoparticles had a spherical morphology with a size of approximately 100 nm. Moreover, the crystalline structure of the silver nanoparticles was confirmed by XRD analysis, further validating their successful synthesis. Additionally, FTIR analysis provided evidence of the presence of phytochemicals involved in synthesizing the AgNPs. the biosynthesized silver nanoparticles (AgNPs) were evaluated for antibacterial and antifungal activities. The AgNPs displayed substantial efficacy against common bacterial strains, including Staphylococcus aureus (71%), Escherichia coli (59%), and Klebsiella pneumoniae (64%). Furthermore, they demonstrated significant antifungal activity against plant pathogenic fungi, namely Aspergillus niger (65%), Aspergillus flavus (70%) and Fusarium oxysporum (61%).","PeriodicalId":18398,"journal":{"name":"Micro & Nano Letters","volume":"18 9-12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/mna2.12179","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135738478","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

Controllability study of copper-tin-sulphide (Cu3SnS4) material based on the ratio adjustment of Cu to Sn elements 基于铜锡比调整的硫化铜锡(Cu3SnS4)材料可控性研究

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-10-29 DOI: 10.1049/mna2.12176

Mingrong Dong, Leikai Wei, Yan Zhu

{"title":"Controllability study of copper-tin-sulphide (Cu3SnS4) material based on the ratio adjustment of Cu to Sn elements","authors":"Mingrong Dong, Leikai Wei, Yan Zhu","doi":"10.1049/mna2.12176","DOIUrl":"10.1049/mna2.12176","url":null,"abstract":"The synthesis of pure phase Cu3SnS4 is of great significance for improving its material properties. Here, the control law of Cu and Sn element ratio on the synthesis of pure phase Cu3SnS4 from physical and chemical methods was analyzed through literature research. The results: (1) the adjustment of the Cu-to-Sn ratio metal elements as a phase control parameter has the characteristics of flexibility and controllability. (2) When the precursor component is rich in Cu and the chemical potential of the medium and high sulphur is high, the phase will develop to a wider thermodynamically stable region of Cu3SnS4. By adjusting the Cu-to-Sn ratio elements, when the release rate of anions and the reaction rate of cations adapt to each other, the thermodynamic reaction conditions can be well satisfied, which is beneficial to the preparation of pure phase Cu3SnS4. (3) The phase control method of Cu and Sn element ratio of template seed crystal can not only realize the reasonable regulation of Cu and Sn element ratio but also control the synthesis of phase more accurately. The results of this paper have certain reference values for the application of new materials synthesized by adjusting the proportion of elements.","PeriodicalId":18398,"journal":{"name":"Micro & Nano Letters","volume":"18 9-12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/mna2.12176","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135737602","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

Investigation of cell damage of periodontopathic bacteria exposed to silver, zirconium oxide, and silicon oxide nanoparticles as antibacterial agents 银、氧化锆和氧化硅纳米颗粒作为抗菌剂对牙周病细菌细胞损伤的研究

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-10-19 DOI: 10.1049/mna2.12178

Yeşim Dağlıoğlu, Mustafa Cihan Yavuz, Omer Ertürk, Fuad Ameen, Mehrdad Khatami

{"title":"Investigation of cell damage of periodontopathic bacteria exposed to silver, zirconium oxide, and silicon oxide nanoparticles as antibacterial agents","authors":"Yeşim Dağlıoğlu, Mustafa Cihan Yavuz, Omer Ertürk, Fuad Ameen, Mehrdad Khatami","doi":"10.1049/mna2.12178","DOIUrl":"https://doi.org/10.1049/mna2.12178","url":null,"abstract":"Antibiotic resistance is one of the biggest public health problems of our time. The nanoparticles are a powerful alternative to these antibiotics. Engineered nanoparticles show toxic effects on bacteria by different mechanisms. The bacteria–cell interaction of engineered nanoparticles exerts their toxic effects through changes in cell wall, cell membrane, and cytoplasm content/density. Thus, death occurs as a result of cell deformation. In this study, the cellular damage of silver nanoparticles, which are known to have strong antibacterial properties, and zirconium oxide and silicon oxide engineering nanoparticles, which are less known, on periodontopathic (Prevotella intermedia and Aggregatibacter actinomycetemcomitans) bacteria, were investigated by ultrastructural changes. The lysis of the cytoplasm and separation of the membrane cytoplasm were observed. Both types of bacteria treated with Ag ENP show more hollow cytoplasm than bacteria treated with the other two nanoparticles.","PeriodicalId":18398,"journal":{"name":"Micro & Nano Letters","volume":"18 9-12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mna2.12178","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50152500","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

In vitro analysis of antibacterial activity against wound pathogens, potential for wound healing, and anti-melanoma properties of biosynthesized zinc oxide nanoparticles 生物合成氧化锌纳米颗粒对伤口病原体的抗菌活性、伤口愈合潜力和抗黑色素瘤特性的体外分析

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-09-24 DOI: 10.1049/mna2.12177

Ananya Jindaruk, Titiradsadakorn Jaithon, Jiraroj T-Thienprasert, Nattanan Panjaworayan T-Thienprasert

{"title":"In vitro analysis of antibacterial activity against wound pathogens, potential for wound healing, and anti-melanoma properties of biosynthesized zinc oxide nanoparticles","authors":"Ananya Jindaruk, Titiradsadakorn Jaithon, Jiraroj T-Thienprasert, Nattanan Panjaworayan T-Thienprasert","doi":"10.1049/mna2.12177","DOIUrl":"https://doi.org/10.1049/mna2.12177","url":null,"abstract":"Staphylococcus aureus is the most common cause of wound infections. Infected wounds increase wound severity and have a slower rate of healing. Moreover, emergence of multiple-drug resistant bacteria such as methicillin-resistant S. aureus (MRSA) limited treatment options. This study was therefore aimed to evaluate antibacterial activity against wound pathogen and wound-healing properties of green synthesized ZnO nanoparticles derived from mangosteen peel crude extract (ZnO-Gm). Moreover, their anti-skin cancer activity was also investigated in vitro. As a result, the ZnO-Gm particles significantly inhibited growth of S. aureus and MRSA with the IC50 values at 0.44 and 0.51 mg/mL, respectively. By performing quantitative reactive oxygen species (ROS) assay, the intracellular ROS in both treated S. aureus and MRSA with ZnO-Gm was found to be significantly elevated. Furthermore, ZnO-Gm exhibited cytotoxic effects via induction of apoptosis on the A375 melanoma cancer cell line, with an IC50 value of 8.91 µg/mL, while not affecting the normal cell line (Vero). In addition, 30 µg/mL of ZnO-Gm could strongly promote wound healing of an epidermal keratinocyte cell line (HaCaT). Consequently, the findings of this study demonstrated that the green synthesized ZnO nanoparticles have potential as antibacterial agents, wound-healing materials, and anti-melanoma agents.","PeriodicalId":18398,"journal":{"name":"Micro & Nano Letters","volume":"18 9-12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mna2.12177","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50143646","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

Research on the influence of stamping materials on resist flow and the residual layer in thermal nanoimprint lithography 纳米热压印光刻中压印材料对抗蚀剂流动和残余层影响的研究

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-09-22 DOI: 10.1049/mna2.12175

Hong-Wen Sun, Tian-Hua Tang, Jing-Sheng Wang, Li-Jun Gu, Yan-Chun Huang, Ya-Ru Li

引用次数: 0

Nanoencapsulation of oral-pharmaceutical lactoferrin using chitosan and the evaluation of stability against trypsin and pepsin and its antibacterial effect 壳聚糖纳米包埋口服药物乳铁蛋白及其对胰蛋白酶和胃蛋白酶的稳定性评价及其抗菌作用

IF 1.3 4区材料科学

Micro & Nano Letters Pub Date : 2023-09-13 DOI: 10.1049/mna2.12174

Farzaneh Hedyeloo, Fatemeh Moradian, Mehran Rostami

{"title":"Nanoencapsulation of oral-pharmaceutical lactoferrin using chitosan and the evaluation of stability against trypsin and pepsin and its antibacterial effect","authors":"Farzaneh Hedyeloo, Fatemeh Moradian, Mehran Rostami","doi":"10.1049/mna2.12174","DOIUrl":"https://doi.org/10.1049/mna2.12174","url":null,"abstract":"Lactoferrin (Lf) is an oral-pharmaceutical protein with a variety of biological activities that have attracted the attention of scientists today. In this study, Lf was nano-encapsulated in chitosan biopolymer by ion gelation method with a concentration of 2.5 mg/ml of chitosan and 0.2 and 0.5 mg/ml of Lf and some physicochemical properties were evaluated using zeta potential, DLS, AFM, and SEM. Also, its stability against digestive enzymes such as pepsin and trypsin and its antibacterial effect compare to Lf on Escherichia coli were investigated. The result showed that the mean size of nano-encapsulated lactoferrin (NE-Lf) was 129.6 and 654.6 nm as well as zeta potential, +3.6 and −2.3 mV for 0.2 and 0.5 mg/ml Lf, respectively. SEM and AFM image analysis of NE-Lf showed uniform surfaces, cubic, and homogeneous in shape, as well asdispersion stability of the nanoparticles. NE-Lf had greater stability against the digestion of pepsin and trypsin than Lf. The efficiency of Lf encapsulation in chitosan was 75%. Both NE-Lf and Lf showed that they were able to reduce the growth of E. coli in a dose-dependent manner. EN-Lf was prepared in a simpler way and in lower concentrations of chitosan and Lf than previous methods.","PeriodicalId":18398,"journal":{"name":"Micro & Nano Letters","volume":"18 9-12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mna2.12174","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50132250","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