Nano express最新文献_第2页

Innovations in nanomaterial-embedded polymer membranes for water and wastewater treatment: a comprehensive review 用于水和废水处理的纳米材料嵌入式聚合物膜的创新：全面综述

Nano express Pub Date : 2024-04-12 DOI: 10.1088/2632-959x/ad3e1b

Mithun Rani Nath, Kaushik Pal, A. Imran, Al-Nakib Chowdhury

{"title":"Innovations in nanomaterial-embedded polymer membranes for water and wastewater treatment: a comprehensive review","authors":"Mithun Rani Nath, Kaushik Pal, A. Imran, Al-Nakib Chowdhury","doi":"10.1088/2632-959x/ad3e1b","DOIUrl":"https://doi.org/10.1088/2632-959x/ad3e1b","url":null,"abstract":"\u0000 There has been growing interest in advancing nanoparticle-embedded polymeric membranes and their significant utilization in wastewater treatment to address the global water pollution problem. Incorporation of nanomaterials into the membrane matrices not only enhances the physicochemical properties like hydrophilicity, mechanical and thermal stability, porosity, antifouling, and antibacterial properties of the polymers but also influences the membrane permeability, selectivity, and several contaminant removals. This overview highlighted the development of nanomaterials like metal/metal oxide nanoparticles (0D), carbon nanotubes (1D), graphene or graphene oxide (GO) (2D layer materials), zwitterionic, zeolites, and associated structures (3D) blended with significant polymeric materials, along with synthesis and integration techniques for fabricating mixed-matrix nanoparticle-embedded polymer nanocomposite (PNC) membranes. This article also addresses the limitations of conventional water treatment technologies, recent challenges of polymer membrane technology, environmental impact, human considerations, and the prospects of these advanced nanoparticle-embedded polymer membranes for sustainable water and wastewater treatment. The motivation for future research in polymeric materials with embedded nanoparticles and the prediction of novel membranes for water purification will also be provided.","PeriodicalId":484840,"journal":{"name":"Nano express","volume":"3 33","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140712267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single-Step Generation of 1D FeCo Nanostructures 单步生成一维铁钴纳米结构

Nano express Pub Date : 2024-04-12 DOI: 10.1088/2632-959x/ad3e1c

Mehran Sedrpooshan, P. Ternero, C. Bulbucan, Adam Burke, M. Messing, R. Westerström

{"title":"Single-Step Generation of 1D FeCo Nanostructures","authors":"Mehran Sedrpooshan, P. Ternero, C. Bulbucan, Adam Burke, M. Messing, R. Westerström","doi":"10.1088/2632-959x/ad3e1c","DOIUrl":"https://doi.org/10.1088/2632-959x/ad3e1c","url":null,"abstract":"\u0000 Magnetic one-dimensional structures are attractive nanomaterials due to the variety of potential applications they can provide. The fabrication of bimetallic 1D structures further expands the capabilities of such structures by tailoring the magnetic properties. Here, a single-step template-free method is presented for the fabrication of 1D FeCo alloy nanochains. In this approach, charged single-crystalline FeCo nanoparticles are first generated by the co-ablation of pure Fe and Co electrodes under a carrier gas at ambient pressures and attracted to a substrate using an electric field. When reaching the surface, the particles are self-assembled into parallel nanochains along the direction of an applied magnetic field. The approach allows for monitoring the self-assembly particle by particle as they are arranged into linear 1D chains with an average length controlled by the deposited particle concentration. Facilitated by the self-assembly, the magnetic properties of the structures can be studied in detail. Magnetometry measurements revealed that arranging nanoparticles into nanochains results in a 100% increase in the remanent magnetization, indicating significant shape anisotropy. Furthermore, by combining X-ray microscopy and micromagnetic simulations, we have studied the local magnetization configuration along the nanochains. Our findings show that variations in magnetocrystalline anisotropy along the structure play a crucial role in the formation of magnetic domains.","PeriodicalId":484840,"journal":{"name":"Nano express","volume":"14 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140710151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

β-Ga2O3 nanostructures for photocatalytic degradation of red amaranth toxic dye 用于光催化降解红苋菜有毒染料的 β-Ga2O3 纳米结构

Nano express Pub Date : 2024-04-11 DOI: 10.1088/2632-959x/ad3d74

J. Castillo-Saenz, David Dominguez, Abraham Arias, L. A. Arce, M.H. Farías, O. Peréz-Landeros, B. Valdez, N. Nedev, Javier Alonso Lopez

引用次数: 0

Magnetic and optical properties of ZnO nanoparticles and nanorods synthesized by green chemistry 绿色化学合成的氧化锌纳米颗粒和纳米棒的磁学和光学特性

Nano express Pub Date : 2024-04-11 DOI: 10.1088/2632-959x/ad3d73

C. Reyes-Damián, Rafael Álvarez-Chimal, Francisco Ascencio, J. León-Flores, Jesús Arenas-Alatorre

{"title":"Magnetic and optical properties of ZnO nanoparticles and nanorods synthesized by green chemistry","authors":"C. Reyes-Damián, Rafael Álvarez-Chimal, Francisco Ascencio, J. León-Flores, Jesús Arenas-Alatorre","doi":"10.1088/2632-959x/ad3d73","DOIUrl":"https://doi.org/10.1088/2632-959x/ad3d73","url":null,"abstract":"\u0000 ZnO nanostructures have attracted considerable attention because of their physicochemical properties and applications as antibacterial agents, photocatalytic reactions for pollutant removal, and electronics. Hence, efficient production and knowledge of their properties under different synthesis conditions are essential. Biosynthesis has emerged as an excellent growth-directing method for synthesizing nanomaterials, representing a soft and cleaner alternative for their production. In this study, we synthesized different ZnO nanostructures using a soft chemistry method at different growth temperatures, from 200 to 800 °C every 200 °C. The crystalline structure was estudied by X-ray Diffraction (XRD) and High-Resolution Transmission Electron Microscopy (HRTEM). The shape and size were studied by Field Emission Scanning Electron Microscopy (FESEM) and Transmission Electron Microscopy (TEM), which revealed a ZnO hexagonal phase with two shapes: nanoparticles (NPs) with irregular shapes and nanorods of different sizes. The optical properties were studied by Raman and UV-visible spectroscopy, and optical absorption measurements showed bandgap tuning of the produced nanostructures. Finally, the magnetic characteristics of the samples demonstrated magnetic anisotropy due to the preference for crystalline formation and the size of the nanoparticles. The magnetic interaction between the two types of NPs increased the diamagnetism associated with the nanorods.","PeriodicalId":484840,"journal":{"name":"Nano express","volume":"26 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140714019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Large area MoSe2 and MoSe2/Bi2Se3 films on sapphire (0001) for near-infrared photodetection 蓝宝石 (0001) 上用于近红外光电探测的大面积 MoSe2 和 MoSe2/Bi2Se3 薄膜

Nano express Pub Date : 2024-04-10 DOI: 10.1088/2632-959x/ad3cfc

Rahul Kumar, V. Aggarwal, S. Gautam, Aditya V. Yadav, Bheem Singh, Ramakrishnan Ganesan, Govind Gupta, S. S. Kushvaha

{"title":"Large area MoSe2 and MoSe2/Bi2Se3 films on sapphire (0001) for near-infrared photodetection","authors":"Rahul Kumar, V. Aggarwal, S. Gautam, Aditya V. Yadav, Bheem Singh, Ramakrishnan Ganesan, Govind Gupta, S. S. Kushvaha","doi":"10.1088/2632-959x/ad3cfc","DOIUrl":"https://doi.org/10.1088/2632-959x/ad3cfc","url":null,"abstract":"\u0000 The fabrication of heterojunction-based photodetectors (PDs) is well known for the enhancement of PDs performances, tunable nature of photoconductivity, and broadband application. Herein, the PDs based on MoSe2 and MoSe2/Bi2Se3 heterojunction on sapphire (0001) substrates were deposited using a r.f. magnetron sputtering system. The high-resolution x-ray diffraction and Raman spectroscopy characterizations disclosed the growth of the 2-H phase of MoSe2 and the rhombohedral phase of Bi2Se3 thin films on sapphire (0001). The chemical and electronic states of deposited films were studied using x-ray photoelectron spectroscopy and revealed the stoichiometry growth of MoSe2. We have fabricated metal-semiconductor-metal type PD devices on MoSe2 and MoSe2/Bi2Se3 heterojunction and the photo-response measurements were performed at external voltages (0.1-5) V under near-infrared (1064 nm) light illumination. The sole MoSe2 PD device shows positive photoconductivity behavior whereas MoSe2/Bi2Se3 heterojunction PD exhibits negative photoconductivity. It was found that the responsivity of MoSe2 and MoSe2/Bi2Se3 heterojunction PDs is 1.39 A/W and 5.7 A/W, respectively. The enhancement of photoresponse of MoSe2/Bi2Se3 PD nearly four-fold compared to bare MoSe2 PD shows the importance of heterojunction structures for futuristics optoelectronic applications.","PeriodicalId":484840,"journal":{"name":"Nano express","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140717282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 carbon dots supplementation in Chlorella vulgaris biomass production and its composition 补充碳点对小球藻生物量生产及其组成的影响

Nano express Pub Date : 2024-04-10 DOI: 10.1088/2632-959x/ad3cfd

Sergio Solis Flores, Itzel Y. López-Pacheco, Angel M Villalba-Rodríguez, Reyna Berenice González-González, Roberto Parra-Saldívar, Hafiz M. N. Iqbal

{"title":"Effect of carbon dots supplementation in Chlorella vulgaris biomass production and its composition","authors":"Sergio Solis Flores, Itzel Y. López-Pacheco, Angel M Villalba-Rodríguez, Reyna Berenice González-González, Roberto Parra-Saldívar, Hafiz M. N. Iqbal","doi":"10.1088/2632-959x/ad3cfd","DOIUrl":"https://doi.org/10.1088/2632-959x/ad3cfd","url":null,"abstract":"\u0000 Microalgae cultures have an excellent ability to capture CO2 and produce high, medium, and low valuable biocompounds such as proteins, carbohydrates, lipids, pigments, and polyhydroxyalkanoates; those compounds have shown excellent properties in the pharmaceutical, cosmetic, food, and medical industries. Recently, the supplementation of carbon dots (CDs) in microalgae cultures has been explored as a new strategy to increase light capture and improve photoluminescence, which in turn enhances biomass growth and biocompounds production. In this work, we synthesized CDs through a simple carbonization method using orange juice as a natural precursor. The green synthesized CDs were analyzed in detail through characterization techniques such as Fourier-transform infrared spectroscopy (FTIR), UV–visible, fluorescence spectroscopy, and ζ potential analysis. Moreover, CDs were added to Chlorella vulgaris to analyze the response under different photoperiod cycles and CDs dosages. The optimal results were obtained with the addition of 0.5 mg/L of CDs under a photoperiod cycle of 16h:8h (light:dark). In these conditions, a maximum biomass production of 2.12 g/L was observed, which represents an enhancement of 112% and 17% in comparison to the control samples under the photoperiod of 12h:12 h and 16h:8h (light/dark), respectively. Furthermore, the production of lipids, proteins, and carbohydrates was significantly increased to 249 mg/g, 285 mg/g, and 217 mg/g dry weight, respectively. These results suggest that the addition of CDs enhances cell growth and increases the production of lipids and proteins, being a strategy with great potential for the food and pharmaceutical industries.","PeriodicalId":484840,"journal":{"name":"Nano express","volume":"112 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140720065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A one-way street for phonon transport: past, present and future of solid-state thermal rectification 声子传输的单行道：固态热整流的过去、现在和未来

Nano express Pub Date : 2024-02-16 DOI: 10.1088/2632-959x/ad2a17

R. Rurali

引用次数: 0

Silver-doped graphite oxide composites used as antimicrobial agents against Staphylococcus aureus, Escherichia coli and Tatumella terrea evaluated by direct TLC bioautography 通过直接 TLC 生物自动层析技术评估用作金黄色葡萄球菌、大肠杆菌和 Tatumella terrea 抗菌剂的掺银氧化石墨复合材料

Nano express Pub Date : 2024-02-15 DOI: 10.1088/2632-959x/ad2998

G. Chávez-Esquivel, H. Cervantes-Cuevas, Daniel Eduardo Cortes-Cordova, Paulina Estrada de los Santos, Lazaro Huerta Arcos

{"title":"Silver-doped graphite oxide composites used as antimicrobial agents against Staphylococcus aureus, Escherichia coli and Tatumella terrea evaluated by direct TLC bioautography","authors":"G. Chávez-Esquivel, H. Cervantes-Cuevas, Daniel Eduardo Cortes-Cordova, Paulina Estrada de los Santos, Lazaro Huerta Arcos","doi":"10.1088/2632-959x/ad2998","DOIUrl":"https://doi.org/10.1088/2632-959x/ad2998","url":null,"abstract":"\u0000 Silver-doped graphite oxide composites presented mixed Ag and Ag2O crystalline phases accompanied by C/O and ID/IG average ratios of 2.13 and 1.16, associated with a good oxidation degree and high structural disorder or defects in the carbon material, respectively. The low-silver-doped GrO composite showed homogenous silver particle dispersion and a low particle size distribution (96 nm). However, high-silver-doped GrO composites generated materials with high relative crystallinity, silver particle agglomeration, and Ag metal phase promotion. At 3 and 5 mg ml-1 per chromatographic plate, the silver-doped graphite oxide composites were tested by direct TLC bioautography against Staphylococcus aureus, Escherichia coli, and Tatumella terrea microorganisms, where the minimum inhibitory concentration was 3 mg ml-1 per chromatographic plate. At 3.0 mg ml-1 per chromatographic plate, high-silver-doped GrO composite exhibited a 39%, 3.2-fold, and 83% higher retention factor (Rf) compared with the composite with low-silver-doped GrO composite against S. aureus, E. coli, and T. terra microorganisms, respectively. However, both composites showed similar inhibition capacities at 5.0 mg ml-1 per chromatographic plate against the three microorganisms. This behavior may be associated with both composites reaching the threshold limit. In general, the amount of silver acetate used in the silver-doped GrO composites influenced the dispersion, crystalline phase promotion, particle size distribution, and release capacity of the silver particles, which modified the type of electrostatic adsorption between the composites and the bacterial cell walls.","PeriodicalId":484840,"journal":{"name":"Nano express","volume":"5 51","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139774458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Silver-doped graphite oxide composites used as antimicrobial agents against Staphylococcus aureus, Escherichia coli and Tatumella terrea evaluated by direct TLC bioautography 通过直接 TLC 生物自动层析技术评估用作金黄色葡萄球菌、大肠杆菌和 Tatumella terrea 抗菌剂的掺银氧化石墨复合材料

Nano express Pub Date : 2024-02-15 DOI: 10.1088/2632-959x/ad2998

G. Chávez-Esquivel, H. Cervantes-Cuevas, Daniel Eduardo Cortes-Cordova, Paulina Estrada de los Santos, Lazaro Huerta Arcos

{"title":"Silver-doped graphite oxide composites used as antimicrobial agents against Staphylococcus aureus, Escherichia coli and Tatumella terrea evaluated by direct TLC bioautography","authors":"G. Chávez-Esquivel, H. Cervantes-Cuevas, Daniel Eduardo Cortes-Cordova, Paulina Estrada de los Santos, Lazaro Huerta Arcos","doi":"10.1088/2632-959x/ad2998","DOIUrl":"https://doi.org/10.1088/2632-959x/ad2998","url":null,"abstract":"\u0000 Silver-doped graphite oxide composites presented mixed Ag and Ag2O crystalline phases accompanied by C/O and ID/IG average ratios of 2.13 and 1.16, associated with a good oxidation degree and high structural disorder or defects in the carbon material, respectively. The low-silver-doped GrO composite showed homogenous silver particle dispersion and a low particle size distribution (96 nm). However, high-silver-doped GrO composites generated materials with high relative crystallinity, silver particle agglomeration, and Ag metal phase promotion. At 3 and 5 mg ml-1 per chromatographic plate, the silver-doped graphite oxide composites were tested by direct TLC bioautography against Staphylococcus aureus, Escherichia coli, and Tatumella terrea microorganisms, where the minimum inhibitory concentration was 3 mg ml-1 per chromatographic plate. At 3.0 mg ml-1 per chromatographic plate, high-silver-doped GrO composite exhibited a 39%, 3.2-fold, and 83% higher retention factor (Rf) compared with the composite with low-silver-doped GrO composite against S. aureus, E. coli, and T. terra microorganisms, respectively. However, both composites showed similar inhibition capacities at 5.0 mg ml-1 per chromatographic plate against the three microorganisms. This behavior may be associated with both composites reaching the threshold limit. In general, the amount of silver acetate used in the silver-doped GrO composites influenced the dispersion, crystalline phase promotion, particle size distribution, and release capacity of the silver particles, which modified the type of electrostatic adsorption between the composites and the bacterial cell walls.","PeriodicalId":484840,"journal":{"name":"Nano express","volume":"427 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139834243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural, Optical and Magnetic properties of Cu doped CeO2 nano powders synthesized by solid state reaction 固态反应合成的掺铜 CeO2 纳米粉体的结构、光学和磁学特性

Nano express Pub Date : 2024-01-05 DOI: 10.1088/2632-959x/ad1bb4

Godugunuru Chinna Venkata Subbaiah, N. Rao

{"title":"Structural, Optical and Magnetic properties of Cu doped CeO2 nano powders synthesized by solid state reaction","authors":"Godugunuru Chinna Venkata Subbaiah, N. Rao","doi":"10.1088/2632-959x/ad1bb4","DOIUrl":"https://doi.org/10.1088/2632-959x/ad1bb4","url":null,"abstract":"\u0000 The present study employed the solid-state reaction approach to synthesize powder samples of cerium oxide (Ce1-xCuxO) with copper (Cu) substitution. Subsequently, these samples were subjected to annealing at a temperature of 950℃ for a duration of 10 hours using a horizontally positioned tube-controlled furnace. The present study aims to evaluate the characteristics of annealed sample powders and examine the impact of annealing on these qualities. The cubic structure was verified using X-ray diffraction (XRD) analysis. The size of the crystallites exhibited a range of 16.9 to 40.43 nm, whilst the lattice parameters demonstrated an enhancement from 5.456 to 5.482 Ǻ. Based on the findings of optical research, it has been observed that the optical band gap of the powders exhibits a rise in value as the concentration is reduced, ranging from 3.26 to 3.16 eV. The examination of Ce1-xCuxO nano powders using photoluminescence (PL) analysis at excitation wavelengths of 300 nm revealed emission in the violet, blue, green, and red regions within the range of 300-700 nm. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) were employed for the examination of the surface characteristics and chemical composition of Ce1-xCuxO powder specimens. The observed surface morphology exhibited a predominantly spherical shape. The nano powder samples exhibit paramagnetic properties as indicated by their magnetic characteristics. The magnetic moment of Ce1-xCuxO nanoparticles that have not undergone annealing varied between 153.06 x10-6 and 490.91 x 10-6 emu/g, whereas the coercive field ranged from 137.18 to 4857.3 Oe. The outcome that was noticed is analysed and deliberated about in this investigation.","PeriodicalId":484840,"journal":{"name":"Nano express","volume":"42 41","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139382465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0