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The 3rd International Online-Conference on Nanomaterials最新文献

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Immobilization of Fungal Peroxidase on Paramagnetic Nanoparticles for Synthetic Dye Decolorization 顺磁性纳米颗粒固定化真菌过氧化物酶用于合成染料脱色
The 3rd International Online-Conference on Nanomaterials Pub Date : 2022-07-19 DOI: 10.3390/materproc2022009024
K. Omeje, Chinonso Magbo, E. Ossai, J. Ozioko, B. O. Ezema, N. Nnolim, S. Eze
{"title":"Immobilization of Fungal Peroxidase on Paramagnetic Nanoparticles for Synthetic Dye Decolorization","authors":"K. Omeje, Chinonso Magbo, E. Ossai, J. Ozioko, B. O. Ezema, N. Nnolim, S. Eze","doi":"10.3390/materproc2022009024","DOIUrl":"https://doi.org/10.3390/materproc2022009024","url":null,"abstract":": Peroxidase was produced by Aspergillus flavus KIGC on 11 th day of fermentation when grown on banana peel as the sole carbon source. It was purified to 8.86 folds with percentage recovery of 49.72%. The purified peroxidase was immobilized on magnetic nanoparticle and character-ized using DLS, DSC, XRD, FTIR and SEM analyses. The results suggest adequate nanoparticle for-mulation and effective enzyme immobilization. Optimal temperatures for free and immobilized peroxidase were 75 and 70 °C, respectively, optimum pH of 5.0 and 9.0 were obtained for free enzyme and 6.5 and 9.0 for immobilized peroxidase, respectively. The Km of 0.075mM and catalytic efficiency of 90.66 Mol/S-1 were achieved by the immobilized peroxidase on guaiacol as substrate. The immobilized peroxidase exhibited enhanced synthetic dyes decolorization ability.","PeriodicalId":336049,"journal":{"name":"The 3rd International Online-Conference on Nanomaterials","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130746606","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
Formulation of a Multifunctional Nanocomposite Hydrogel Based on Natural Polysaccharides, Biogenic Copper Nanoparticles and Essential Oils 基于天然多糖、生物铜纳米粒子和精油的多功能纳米复合水凝胶的配方
The 3rd International Online-Conference on Nanomaterials Pub Date : 2022-05-10 DOI: 10.3390/materproc2022009005
A. Neculai-Valeanu, A. Ariton
{"title":"Formulation of a Multifunctional Nanocomposite Hydrogel Based on Natural Polysaccharides, Biogenic Copper Nanoparticles and Essential Oils","authors":"A. Neculai-Valeanu, A. Ariton","doi":"10.3390/materproc2022009005","DOIUrl":"https://doi.org/10.3390/materproc2022009005","url":null,"abstract":"RESULTS and DISCUSSIONS goal to nanoparticles synthesized presence nanoparticles hydrogel. significantly better antimicrobial especially on Staphylococcus embedded with and essential a higher both and negative bacteria. It also displayed antibiotic activity against MRSA ATCC 33591, a methicillin-resistant Staphylococcus aureus strain with public health significance. Conclusions: When coupled with the specified essential oil blend, copper sulfate demonstrated strong synergistic antibacterial action. Altogether, this work assessed and validated the in vitro antibacterial activity of a polysaccharides-based composite hydrogel comprising biologically synthesized copper nanoparticles and essential oils with potential applications in both human and veterinary medicine.","PeriodicalId":336049,"journal":{"name":"The 3rd International Online-Conference on Nanomaterials","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130502007","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
Optimization of Synthesis of Bovine Serum Albumin-Encapsulated Fluorescent Gold Nanoclusters 牛血清白蛋白包封荧光金纳米团簇的合成优化
The 3rd International Online-Conference on Nanomaterials Pub Date : 2022-05-10 DOI: 10.3390/materproc2022009015
Radek Ostruszka, K. Šišková
{"title":"Optimization of Synthesis of Bovine Serum Albumin-Encapsulated Fluorescent Gold Nanoclusters","authors":"Radek Ostruszka, K. Šišková","doi":"10.3390/materproc2022009015","DOIUrl":"https://doi.org/10.3390/materproc2022009015","url":null,"abstract":"Gold nanoclusters (AuNCs) are nanoscale structures consisting of a few to tens of gold atoms. AuNCs exhibit sizeand scaffold-dependent photoluminescence, which allows their usage as analytical sensors or as fluorescent probes for biological imaging [1,2]. Typical synthesis involves mixing a metal precursor (HAuCl4) with bovine serum albumin (BSA), adding sodium hydroxide (NaOH) to increase the pH of the reaction mixture (and starting the reduction of Au(III)), and finally exposing the solution to microwave irradiation. In this contribution, different molar ratios of the reactants were used to optimize the fluorescent properties of AuNCs. The change in molar ratios affected the fluorescence intensity and position of fluorescence emission maximum of AuNCs; simultaneously, it altered the period which is necessary for reaching the fluorescence maximum. It was observed that with an increasing concentration of NaOH (in the pH range of 9–13), the fluorescence maximum position manifested itself via a bathochromic shift, and the maximum value of fluorescence intensity decreased and was reached in a shorter period than at lower pHs. Indeed, a lower pH value of the reaction mixture can lead to an efficient increase in the fluorescence quantum yield of AuNCs. This might be caused by several simultaneous factors: (i) conformational changes in BSA are less pronounced at pH 9 than at pH 13, for instance; and (ii) faster reduction of Au(III) proceeds at higher pH values, which may consequently lead to overgrowth of nanoclusters to non-fluorescent particles. Both factors may contribute to the generation of a higher number of Au nanoclusters of smaller sizes possessing excellent fluorescent properties while working at lower pH values. The choice of an appropriate fluorescent standard is tremendously important, but often underestimated by many researchers.","PeriodicalId":336049,"journal":{"name":"The 3rd International Online-Conference on Nanomaterials","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123445851","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
Study of Beeswax–Carbon Nanotubes–Paperboard Nanocomposite for Temperature Regulation of Packaging Container 蜂蜡-碳纳米管-纸板纳米复合材料用于包装容器温度调节的研究
The 3rd International Online-Conference on Nanomaterials Pub Date : 2022-04-29 DOI: 10.3390/materproc2022009009
Tejashree Amberkar, P. Mahanwar
{"title":"Study of Beeswax–Carbon Nanotubes–Paperboard Nanocomposite for Temperature Regulation of Packaging Container","authors":"Tejashree Amberkar, P. Mahanwar","doi":"10.3390/materproc2022009009","DOIUrl":"https://doi.org/10.3390/materproc2022009009","url":null,"abstract":"","PeriodicalId":336049,"journal":{"name":"The 3rd International Online-Conference on Nanomaterials","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132785181","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
Formation of Polaron Bands in Oxidized 3,4-Ethylenedioxythiophene Oligomer 氧化3,4-乙烯二氧噻吩低聚物极化子带的形成
The 3rd International Online-Conference on Nanomaterials Pub Date : 2022-04-29 DOI: 10.3390/materproc2022009020
M. Terebinska, O. Filonenko, O. Tkachuk, A. Datsiuk, V. Lobanov
{"title":"Formation of Polaron Bands in Oxidized 3,4-Ethylenedioxythiophene Oligomer","authors":"M. Terebinska, O. Filonenko, O. Tkachuk, A. Datsiuk, V. Lobanov","doi":"10.3390/materproc2022009020","DOIUrl":"https://doi.org/10.3390/materproc2022009020","url":null,"abstract":": The results of calculations by the DFT method with the exchange–correlation functional B3LYP 6–31 G** of the electronic and spatial structure of the 3,4-ethylenedioxythiophene oligomer containing 12 units (E12) in the charge states 0, +1, +2, +3 and +4 were obtained. Increasing the charge reproduces the increase in the degree of doping. The received results allow us to conclude that in the oxidized oligomer of 3,4-ethylenedioxythiophene containing 12 monomer units, conductivity is provided by the formation of two polarons at the ends of the chain at a high degree of doping. For oligomers with a different number of units in poly 3,4-ethylenedioxythiophene, more complex polaron structures can be realized by charge carriers.","PeriodicalId":336049,"journal":{"name":"The 3rd International Online-Conference on Nanomaterials","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132936557","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
Phase Change Material Nanocomposites for Thermal Energy Storage Applications 相变材料纳米复合材料在热能储存中的应用
The 3rd International Online-Conference on Nanomaterials Pub Date : 2022-04-29 DOI: 10.3390/materproc2022009008
Tejashree Amberkar, P. Mahanwar
{"title":"Phase Change Material Nanocomposites for Thermal Energy Storage Applications","authors":"Tejashree Amberkar, P. Mahanwar","doi":"10.3390/materproc2022009008","DOIUrl":"https://doi.org/10.3390/materproc2022009008","url":null,"abstract":"","PeriodicalId":336049,"journal":{"name":"The 3rd International Online-Conference on Nanomaterials","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128622048","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
Dispersion Stability of MWCNTs Decorated with Ag Nanoparticles through Pulse-Reversed Current Electrodeposition Using a Deep Eutectic Solvent 深共晶溶剂脉冲反向电沉积修饰银纳米颗粒MWCNTs的分散稳定性
The 3rd International Online-Conference on Nanomaterials Pub Date : 2022-04-29 DOI: 10.3390/materproc2022009029
A. T. Brandão, S. Rosoiu, Renata Costa, A. F. Silva, L. Anicăi, C. Pereira, M. Enăchescu
{"title":"Dispersion Stability of MWCNTs Decorated with Ag Nanoparticles through Pulse-Reversed Current Electrodeposition Using a Deep Eutectic Solvent","authors":"A. T. Brandão, S. Rosoiu, Renata Costa, A. F. Silva, L. Anicăi, C. Pereira, M. Enăchescu","doi":"10.3390/materproc2022009029","DOIUrl":"https://doi.org/10.3390/materproc2022009029","url":null,"abstract":"","PeriodicalId":336049,"journal":{"name":"The 3rd International Online-Conference on Nanomaterials","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121969610","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
pH Responsive Tunable Plasmonic Resonators Based on Gold-Polysaccharide Nanocomposites 基于金-多糖纳米复合材料的pH响应可调谐等离子体谐振器
The 3rd International Online-Conference on Nanomaterials Pub Date : 2022-04-29 DOI: 10.3390/materproc2022009010
S. Kravchenko, P. Boltovets, Oleksiy Kovalenko, B. Snopok
{"title":"pH Responsive Tunable Plasmonic Resonators Based on Gold-Polysaccharide Nanocomposites","authors":"S. Kravchenko, P. Boltovets, Oleksiy Kovalenko, B. Snopok","doi":"10.3390/materproc2022009010","DOIUrl":"https://doi.org/10.3390/materproc2022009010","url":null,"abstract":": The development of advanced compositions that combine high stability and tunable activity is a forefront trend in modern interdisciplinary science. This important scientific problem is solved by the formation of plasmonic nanostructures embedded in the structure of the adaptive organic matrix of natural polysaccharides. This makes it possible to obtain unique materials with the possibility of optimization for specific tasks both at the stage of synthesis and when used due to the excitation of plasmon resonance of inorganic architecture by external light. We report the results of the study of physicochemical and structural features of composites depending on trigger factors (i.e., pH), the change of which leads to conformational transformations of macromolecules. Consid-ering a nanocomposite as molecular nanobot, “…autonomic preprogrammed structure of atomic level…”, opens the way to design an adaptive natural nanomachine, the properties of which can be controlled by external influences.","PeriodicalId":336049,"journal":{"name":"The 3rd International Online-Conference on Nanomaterials","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125328093","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
Gold Nanoclusters Investigated via Femtosecond-Stimulated Raman Spectroscopy 用飞秒激发拉曼光谱研究金纳米团簇
The 3rd International Online-Conference on Nanomaterials Pub Date : 2022-04-29 DOI: 10.3390/materproc2022009023
Veronika Svačinová, M. Kloz, K. Šišková
{"title":"Gold Nanoclusters Investigated via Femtosecond-Stimulated Raman Spectroscopy","authors":"Veronika Svačinová, M. Kloz, K. Šišková","doi":"10.3390/materproc2022009023","DOIUrl":"https://doi.org/10.3390/materproc2022009023","url":null,"abstract":"","PeriodicalId":336049,"journal":{"name":"The 3rd International Online-Conference on Nanomaterials","volume":"195 5-6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114027208","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
Lipid-Based Nanosystems to Carry Manganese Derivatives for Diagnostic Purpose 脂基纳米系统携带锰衍生物用于诊断目的
The 3rd International Online-Conference on Nanomaterials Pub Date : 2022-04-25 DOI: 10.3390/materproc2022009025
Maddalena Sguizzato, Walter Pula, M. Drechsler, L. Marvelli, R. Cortesi
{"title":"Lipid-Based Nanosystems to Carry Manganese Derivatives for Diagnostic Purpose","authors":"Maddalena Sguizzato, Walter Pula, M. Drechsler, L. Marvelli, R. Cortesi","doi":"10.3390/materproc2022009025","DOIUrl":"https://doi.org/10.3390/materproc2022009025","url":null,"abstract":"","PeriodicalId":336049,"journal":{"name":"The 3rd International Online-Conference on Nanomaterials","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115512614","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
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