Nanoarchitectonics最新文献_第2页

Siloxane-Silver Nanofluid as Potential Self-Assembling Disinfectant: A Preliminary Study on the Role of Functional Alkoxysilanes 硅氧烷-银纳米流体作为潜在的自组装消毒剂:功能性烷氧基硅烷作用的初步研究

Nanoarchitectonics Pub Date : 2022-08-10 DOI: 10.37256/nat.4120231576

A. Tiwari, M. Gupta, G. Pandey, P. Pandey

{"title":"Siloxane-Silver Nanofluid as Potential Self-Assembling Disinfectant: A Preliminary Study on the Role of Functional Alkoxysilanes","authors":"A. Tiwari, M. Gupta, G. Pandey, P. Pandey","doi":"10.37256/nat.4120231576","DOIUrl":"https://doi.org/10.37256/nat.4120231576","url":null,"abstract":"Antimicrobial drug resistance among bacterial and fungal communities have been created a huge challenge for clinicians in treating infections. Conventional antibiotics get non-functional with time due to the rapid adaptation of microorganisms to the environment. Therefore, exploring alternative antimicrobial drugs/nanomaterials to treat such infections is highly needed. Therefore, an alternative to conventional antibiotics, functional alkoxysilane capped Ag-NPs synthesized from 3-aminopropyltrimethoxysilane mediated conversion of silver cations in the presence of three different organic reducing agents, i.e., cyclohexanone, 3-glycidoxypropyltrimethoxysilane and formaldehyde. The antimicrobial potential of synthesized silver nanoparticles was tested against Acinetobacter bauminnii, Candida albicans (mostly causes nosocomial infections) and sporangiospores of Mucorales (Rhizopus arrhizus), which showed a promising result. In addition to low MIC values, these Ag-NPs have shown variable killing dynamics as a function of reducing agents. Further, these functionalized silver nanoparticles were mixed with siloxane polymer to prepare three different siloxane-silver nanofluids. Siloxane-silver nanofluid can be self-assembled when diluted in a desirable volatile solvent on any inanimate surfaces such as medical catheters, surgical clothes and surgical bandages. Finally, the sprays were converted into thin films on sterile plastic strips and examined for their antibacterial activity against drug-resistant bacteria A baumannii. The antibacterial activity of nanofluid thin film has been found as a function of organic reducing reagents that control the morphology of the self-assembled film.","PeriodicalId":18798,"journal":{"name":"Nanoarchitectonics","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75740689","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: 1

Metal-Organic-Frames (MOFs) Based Electrochemical Sensors for Sensing Heavy Metal Contaminated Liquid Effluents: A Review 基于金属有机框架(MOFs)的重金属污染废水电化学传感器研究进展

Nanoarchitectonics Pub Date : 2022-05-25 DOI: 10.37256/nat.3220221272

Pragati Shukla, Archana Mishra, S. Manivanna, D. Mandal

引用次数: 5

Investigation of the Optical, Structural and Compositional Properties of Electrodeposited Lead Manganese Sulfide (PbMnS) Thin Films for Possible Device Applications 电沉积硫化铅锰薄膜的光学、结构和组成特性研究及其在器件中的应用

Nanoarchitectonics Pub Date : 2021-12-13 DOI: 10.37256/nat.3120221226

Laz Nnaedozie Ezenwaka, Augustine Nwode Nwori, Ifeyinwa Euphemia Ottih, Ngozi Agatha Okereke, Nonso Livinus Okoli

{"title":"Investigation of the Optical, Structural and Compositional Properties of Electrodeposited Lead Manganese Sulfide (PbMnS) Thin Films for Possible Device Applications","authors":"Laz Nnaedozie Ezenwaka, Augustine Nwode Nwori, Ifeyinwa Euphemia Ottih, Ngozi Agatha Okereke, Nonso Livinus Okoli","doi":"10.37256/nat.3120221226","DOIUrl":"https://doi.org/10.37256/nat.3120221226","url":null,"abstract":"The properties of PbMnS semiconductor thin films deposited on fluorine-doped tin oxide (FTO) substrate using an electrodeposition method are investigated to determine their possible device applications. Lead acetate, manganese sulfate, and thiourea were used as precursors for sources of lead, manganese, and sulfur ions respectively. The concentration of lead, manganese, and sulfur ions sources with deposition voltage of 1.8 V was kept constant. The films were deposited using three electrodes system of electrodeposition method by varying deposition time. The films were characterized for optical, structural, morphological, and compositional properties and results showed that the absorbance, refractive index, and optical conductivity of the films are high in the visible (VIS) and near-infrared (NIR) regions but decreases in the NIR. These three properties initially increased with an increase in deposition time up to a time of 70 s which has the highest values of these properties before decreasing to lower values. The transmittance and extinction coefficient of the films are low in both VIS and NIR regions. The bandgap energy of PbS was found to be blue shifted with values of 1.51 eV, 1.54 eV, 1.60 eV, 1.45 eV, and 1.35 eV for the films deposited at 30 s, 50 s, 70 s, 90 s, and 110 s respectively. XRD analysis showed that the films are crystalline with sharp peaks positions indexable to crystalline planes of (111), (200), (211), (220), (311) and (400) with average crystallite size in the range of 16.110 nm to 17.218 nm. Energy-dispersive X-ray spectroscopy (EDX) results showed that the films are composed of lead, manganese, and sulfur but there are some impurity elements present mostly as a result of the substrate used. These properties exhibited by the deposited thin films of PbMnS showed that they can be used for many optoelectronic applications such as photovoltaic cells, sensors, photoconductors, etc.","PeriodicalId":18798,"journal":{"name":"Nanoarchitectonics","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85981667","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: 3

Properties of Electrosynthesized Cobalt Doped Zinc Selenide Thin Films Deposited at Varying Time 不同沉积时间电合成钴掺杂硒化锌薄膜的性能

Nanoarchitectonics Pub Date : 2021-09-10 DOI: 10.37256/nat.3120221040

Ezenwaka, L. N., Okoli, N. L., Okereke, N. A., Ezenwa, I. A., Nwori, N. A.

{"title":"Properties of Electrosynthesized Cobalt Doped Zinc Selenide Thin Films Deposited at Varying Time","authors":"Ezenwaka, L. N., Okoli, N. L., Okereke, N. A., Ezenwa, I. A., Nwori, N. A.","doi":"10.37256/nat.3120221040","DOIUrl":"https://doi.org/10.37256/nat.3120221040","url":null,"abstract":"Time optimized cobalt-doped zinc selenide thin films have been successfully electrodeposited on fluorine-doped tin oxide substrates. The films were deposited at the varying time of 1 min, 3 mins, and 5 mins respectively. Film thickness, optical, structural, electrical, and morphological properties of the deposited thin films were evaluated. Film thickness estimated using the gravimetric method increased from 294.35 nm to 399.62 nm as deposition time increased. Optical properties showed that the absorbance of the films ranged from 13.58% to 83.15% and was found to increase as deposition time increased. Transmittance ranged from 24.40% to 73.15% and was found to decrease as deposition time increased. The reflectance of the films was found to be low while the energy band gap ranged between 2.10 eV and 2.85 eV. Structural properties confirmed the deposition of ZnSe thin film with crystallite size values that fall between 14.68 nm and 18.60 nm. Dislocation density is ranged from 4.66 × 1015 lines/m2 to 2.97 × 1015 lines/m2 while microstrain ranged between 8.53 × 10-3 and 5.83 × 10-3. Crystallite sizes of the films were found to increase as deposition time increased while dislocation density and microstrain were found to decrease as deposition time increased. Electrical properties showed that the deposited films are semiconducting films with electrical resistivity values of 1.54 × 105 Ω cm-1.83 × 104 Ω cm and electrical conductivity values of 6.30 × 10-6 S/cm-5.47 × 10-5 S/cm. The micrograph of the films showed that the films were made up of nanoparticles and nanofibres of different dimensions. Energy-Dispersive X-Ray Spectroscopy (EDS) spectra of the films confirmed the presence of cobalt, zinc, and selenium.","PeriodicalId":18798,"journal":{"name":"Nanoarchitectonics","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81445398","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: 5

COVID-19: A Comprehensive View of Diverse Mitigation Measures, Biomaterials and Outlook COVID-19:各种缓解措施、生物材料和前景的综合观点

Nanoarchitectonics Pub Date : 2021-07-13 DOI: 10.37256/NAT.222021806

A. Mohandas, Lin Shi, S. Ramakrishna

{"title":"COVID-19: A Comprehensive View of Diverse Mitigation Measures, Biomaterials and Outlook","authors":"A. Mohandas, Lin Shi, S. Ramakrishna","doi":"10.37256/NAT.222021806","DOIUrl":"https://doi.org/10.37256/NAT.222021806","url":null,"abstract":"COVID-19 the existing contagion is caused by SARS-CoV-2 (Severe Acute Respiratory Syndrome Coronavirus 2). As of 1st March, 2021, the statistical study shows, 114 million people all over the world have been affected by COVID-19 and in this about 2.53 million deaths have been reported with a recovery of 64.4 million cases. The most commonly testified signs of COVID-19 infection are pyrexia, tussis and tiredness; other symptoms that are less common include deprivation in senses (odor or flavor), pharyngitis, stuffy nose, cephalgia, gastroenteritis etc. Among the reported cases, approximately 10-15% progress to severe disease and 5% becomes critically ill. Most people recover at 2-6 weeks after exposure to the virus, but it is reported that there are some patients who may recur some symptoms for weeks or months after initial recovery although they are not infectious during this period. In this review article, we have briefly discussed the different diagnostic and detection measures that are being clinically practiced and the treatment methods including medicines and vaccines which has been undertaken in the fight against COVID-19. Recent advances in various regulatory measures comprising the application of biomaterials engineering (nanomaterials, biosensors, quantum dots, polymeric array-based vaccines, etc.) and the digital technologies are also discussed. Organoid cultures are also used against SARS-CoV-2 to understand the biological phenomena taking place in the human body through infection, and thereby establishing the necessary trials to control the infection. In short, there is a requirement of the combination of study from multidisciplinary areas to understand the virus better and develop more effective mitigation measures. There are still studies under examination to improve the public health and to have complete control over this novel virus.","PeriodicalId":18798,"journal":{"name":"Nanoarchitectonics","volume":"115 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84878740","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

Manganese Deposition Content in Carbon Nanotubes Based Filters: Energy Dispersive X-ray and Rutherford Backscatter Spectrometry Investigations 碳纳米管滤光片中锰沉积含量:能量色散x射线和卢瑟福背散射光谱研究

Nanoarchitectonics Pub Date : 2021-05-25 DOI: 10.37256/NAT.222021961

Emad M. Elsehly

{"title":"Manganese Deposition Content in Carbon Nanotubes Based Filters: Energy Dispersive X-ray and Rutherford Backscatter Spectrometry Investigations","authors":"Emad M. Elsehly","doi":"10.37256/NAT.222021961","DOIUrl":"https://doi.org/10.37256/NAT.222021961","url":null,"abstract":"Carbon nanotubes (CNTs) based filters have a prospective advantage compared to the commercial filters due to their lightweight and ability to work without electricity or heat. The manganese (Mn) removal from aqueous solutions by oxidized multi-walled carbon nanotubes (O-MWCNTs) was investigated. The filtration performance was studied under ambient conditions: the solution pH, the initial manganese concentration, and the MWCNT-filter mass. The samples of MWCNT-filters were investigated using energy dispersive X-ray spectroscopy (EDS) and rutherford backscatter spectrometry (RBS) to account for the manganese content within the MWCNT-filter. These techniques were conducted to study the oxidation effect on the morphology of MWCNTs and evaluate the oxygen functional groups and the average diameter distribution. Based on these examinations, the competence of Mn removal may exceed 91% for 50 ppm initial concentration of Mn, proposing that functionalized MWCNTs is a promising filter. The Mn removal was achieved at low pH with removal enhancement at the pH of 2. Functionalized MWCNTs based filters are promising candidate for heavy metal ions removal from industrial wastewater.","PeriodicalId":18798,"journal":{"name":"Nanoarchitectonics","volume":"29 1","pages":"108-116"},"PeriodicalIF":0.0,"publicationDate":"2021-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81970224","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

Synthesis and Applications of Processable Prussian Blue Nanoparticles 可加工普鲁士蓝纳米颗粒的合成及应用

Nanoarchitectonics Pub Date : 2020-07-17 DOI: 10.37256/nat.212021443

Prem C. Pandey, Priyanshi Pandey

{"title":"Synthesis and Applications of Processable Prussian Blue Nanoparticles","authors":"Prem C. Pandey, Priyanshi Pandey","doi":"10.37256/nat.212021443","DOIUrl":"https://doi.org/10.37256/nat.212021443","url":null,"abstract":"The present report describes a comparative study on chemical synthesis of processable Prussian blue Nanoparticles (PBNPs) suitable for developing PB-based devices. Controlled nucleation of PBNP from single precursors, Potassium hexacyanoferrate, has been recorded as a function of reducing and stabilizing ability of some active organic reducing agents. The use of organic reagent control the nucleation process yielding PBNPs displaying both homogeneous and heterogeneous catalysis. Four different systems of active organic reducing agents i.e.: (1) 3-aminopropyltrimethoxysilane (3-APTMS) and cyclohexanone, (2) tetrahydrofuran hydroperoxide, (3) tetrahydrofuran and hydrogen peroxide and (4) tetrahydrofuran hydroperoxide and 2-(3, 4-epoxycyclohexyl) ethyltrimethoxysilane resulted the formation of PBNP1, PBNP2, PBNP3 and PBNP4 displaying sensitivity of analysis to the order of 480, 330 350 and 400 mA mM-1 cm-2 respectively.The as reported process also enable the controlled synthesis of noble metal nanoparticles introducing new rout for yielding Prussian blue-noble metal nanoparticle nanocomposite that manipulate the catalytic/elecrocatalytic activity for targeted system. As made PBNPs undergo the formation of homogeneous nanodispersion with gold nanoparticles and ruthenium bipyridyl with gradual enhancement in the catalytic activity. The typical application in probing glucose oxidase catalyzed reaction based on both homogeneous and heterogeneous catalysis has been recorded. In addition the synthetic approach could also be explored to incorporate Prussian blue and palladium nanoparticles in mesoporous matrix for developing variety of PB-based devices.","PeriodicalId":18798,"journal":{"name":"Nanoarchitectonics","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76401207","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