Nanotechnologies in Russia最新文献_第7页

Influence of the Carbon Support on the Structural–Morphological Parameters and Electrochemical Properties of Platinum-Containing Catalysts for Fuel-Cell Cathode with a Proton-Exchange Membrane 碳载体对质子交换膜燃料电池阴极含铂催化剂的结构形态参数和电化学性质的影响

IF 0.8

Nanotechnologies in Russia Pub Date : 2024-03-23 DOI: 10.1134/S2635167624600093

Yu. A. Bayan, K. O. Paperzh, I. V. Pankov, A. S. Pavlets, E. A. Moguchikh, A. A. Alekseenko

{"title":"Influence of the Carbon Support on the Structural–Morphological Parameters and Electrochemical Properties of Platinum-Containing Catalysts for Fuel-Cell Cathode with a Proton-Exchange Membrane","authors":"Yu. A. Bayan, K. O. Paperzh, I. V. Pankov, A. S. Pavlets, E. A. Moguchikh, A. A. Alekseenko","doi":"10.1134/S2635167624600093","DOIUrl":"10.1134/S2635167624600093","url":null,"abstract":"Finding the optimal substrate for electrocatalysts used as electrodes in fuel cells is an urgent task for the development of hydrogen energetics. The composition and the morphological and electrochemical properties of platinum–carbon catalysts synthesized according to a common method on various carbon supports (Vulcan XC-72, Vulcan XC-72R, Ketjenblack EC-300J, Ketjenblack EC-600JD, and modified Ketjenblack EC-600JD) and of a JM-20 commercial electrocatalyst are analyzed comparatively. It is found that highly dispersed supports (from 800 m2/g) make it possible to increase the catalytic activity of Pt/C materials in the electroreduction reaction of oxygen by two times compared to those with a specific surface area of less than 250 m2/g. The preliminary treatment of a carbon support with melamine increases the stability of catalysts based on it by 40%. A platinum-carbon catalyst with a 1.6-times-higher electrochemically active surface area and 1.7-times-higher mass activity in the reaction of oxygen electroreduction compared to a commercial analogue is obtained.","PeriodicalId":716,"journal":{"name":"Nanotechnologies in Russia","volume":"18 2 supplement","pages":"S268 - S278"},"PeriodicalIF":0.8,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142413343","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

Interaction of Exogenous Nanoparticles of Refractory Phases with Surfactant Impurities of Non-ferrous Metals in Iron Melts in Contact with Refractory Material 与耐火材料接触的铁熔体中耐火相的外源纳米颗粒与有色金属表面活性剂杂质的相互作用

IF 0.8

Nanotechnologies in Russia Pub Date : 2024-03-23 DOI: 10.1134/S2635167623601274

V. T. Burtsev, S. N. Anuchkin, A. V. Samokhin

引用次数: 0

Impedance of Structures with Non-uniform Current Distribution 电流分布不均匀结构的阻抗

IF 0.8

Nanotechnologies in Russia Pub Date : 2024-03-23 DOI: 10.1134/S2635167623601353

L. A. Shendrikova, N. S. Perov, N. A. Buznikov

引用次数: 0

Changes in the Microstructure and Electrochemical Behavior of Pt/C Electrocatalysts under Various Stress Testing Conditions 各种应力测试条件下 Pt/C 电催化剂微观结构和电化学行为的变化

IF 0.8

Nanotechnologies in Russia Pub Date : 2024-03-23 DOI: 10.1134/S2635167624600081

E. A. Moguchikh, A. A. Alekseenko, I. V. Pankov, D. V. Alekseenko, V. E. Guterman

引用次数: 0

Nanocomplexes of the Anthracycline Antibiotic Daunomycin and Doxorubicin with Selenium Nanoparticles and Polyvinylpyrrolidone: Spectral and Dimensional Characteristics 蒽环类抗生素 Daunomycin 和 Doxorubicin 与硒纳米颗粒和聚乙烯吡咯烷酮的纳米复合物：光谱和尺寸特征

IF 0.8

Nanotechnologies in Russia Pub Date : 2024-03-23 DOI: 10.1134/S2635167623601560

A. I. Kipper, L. N. Borovikova, I. S. Garkushina

{"title":"Nanocomplexes of the Anthracycline Antibiotic Daunomycin and Doxorubicin with Selenium Nanoparticles and Polyvinylpyrrolidone: Spectral and Dimensional Characteristics","authors":"A. I. Kipper, L. N. Borovikova, I. S. Garkushina","doi":"10.1134/S2635167623601560","DOIUrl":"10.1134/S2635167623601560","url":null,"abstract":"The influence of the hydroxyl group in the aglycone of the antitumor antibiotic doxorubicin on the spectrophotometric and dimensional characteristics of nanocomplexes of doxorubicin–polyvinylpyrrolidone–selenium nanoparticles is established. The involvement of components of ternary complexes in intermolecular interactions is assessed using the spectrophotometric method. The radii of gyration (40–60 nm) and hydrodynamic radii (20–70 nm) of the synthesized nanocomplexes are determined using static- and dynamic-light scattering methods. The hydroxyl group present in the structure of the antitumor antibiotic contributed to the formation in an aqueous environment of a more loose, permeable shell of the nanocomplex compared to the daunomycin–polyvinylpyrrolidone–selenium nanoparticles nanocomplexes. An increase in the Se concentration during the synthesis of nanocomplexes leads to expansion of the loose shell. The revealed patterns will further contribute to the development of methods for synthesizing nanocomplexes for the modification of water-soluble antitumor antibiotics.","PeriodicalId":716,"journal":{"name":"Nanotechnologies in Russia","volume":"18 2 supplement","pages":"S360 - S366"},"PeriodicalIF":0.8,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140883991","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

Electron-Beam Deposition for the Synthesis of Memristive Structures Based on Hafnium Oxide 利用电子束沉积技术合成基于氧化铪的薄膜结构

IF 0.8

Nanotechnologies in Russia Pub Date : 2024-03-23 DOI: 10.1134/S2635167623601523

B. S. Shvetsov, A. N. Matsukatova, M. N. Martyshov, D. M. Zhigunov, A. S. Ilyin, T. P. Savchuk, P. A. Forsh, P. K. Kashkarov

引用次数: 0

Improving the Electrochemical Properties of a Cathode Material Based on Lithium–Manganese Phosphate through the Partial Substitution of Mn for Ni 通过以锰部分替代镍改善基于磷酸锰锂的阴极材料的电化学特性

IF 0.8

Nanotechnologies in Russia Pub Date : 2024-03-23 DOI: 10.1134/S2635167624600111

O. A. Drozhzhin, E. V. Zharikova, G. P. Lakienko, M. G. Rozova, E. V. Antipov

引用次数: 0

Liposomes Containing Esters of the Natural Antioxidant Astaxanthin Modified with Pluronic F68 or DSPE-PEG 2000 含有经 Pluronic F68 或 DSPE-PEG 2000 修饰的天然抗氧化剂虾青素酯的脂质体

IF 0.8

Nanotechnologies in Russia Pub Date : 2024-03-23 DOI: 10.1134/S2635167623601511

N. S. Marchenkova, K. E. Barkar, E. A. Kulikov, K. S. Plokhikh, N. Yu. Lotosh, A. A. Selishcheva

{"title":"Liposomes Containing Esters of the Natural Antioxidant Astaxanthin Modified with Pluronic F68 or DSPE-PEG 2000","authors":"N. S. Marchenkova, K. E. Barkar, E. A. Kulikov, K. S. Plokhikh, N. Yu. Lotosh, A. A. Selishcheva","doi":"10.1134/S2635167623601511","DOIUrl":"10.1134/S2635167623601511","url":null,"abstract":"<div>Liposomes containing a natural antioxidant, astaxanthin esters, are prepared by dispersing the lipid film and evaporating from chloroform with further ultrasonic treatment. To increase the stability of the astaxanthin esters, liposomes based on Lipoid S75 (2 mg/mL) are modified with pluronic F68 or PEGylated distearylphosphatidylethanolamine (DSPE-PEG 2000). As a result of optimization, the ratio of phospholipid and modifiers is selected for stable liposomes with 0.5 mg/mL astaxanthin esters. Liposomes with 0.5% pluronic F68 consists of two fractions with sizes of 110 ± 15 and 440 ± 15 nm, and liposomes with DSPE-PEG 2000 (2.5 mg/mL) have one fraction with an average hydrodynamic diameter of 255 ± 40 nm. The ζ potentials of the liposomes are –35 ± 15 and –60 ± 10 mV, respectively. When mononuclear blood cells are incubated with the developed liposomes for 24 h, the survival rate is found to be 84 ± 4%. It is shown that liposomes with astaxanthin esters of different compositions inactivate the ABTS cation radical 17–50% more effectively than liposomes without astaxanthin esters.</div>","PeriodicalId":716,"journal":{"name":"Nanotechnologies in Russia","volume":"18 2 supplement","pages":"S240 - S249"},"PeriodicalIF":0.8,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142413351","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

BC/PEDOT:PSS/Graphene Conductive Composite As the Receptor Element for a Bacterial Biosensor 作为细菌生物传感器受体元件的 BC/PEDOT:PSS/Graphene 导电复合材料

IF 0.8

Nanotechnologies in Russia Pub Date : 2024-03-23 DOI: 10.1134/S2635167623601493

A. E. Kitova, Yu. V. Plekhanova, S. E. Tarasov, N. A. Klenova, A. N. Reshetilov

{"title":"BC/PEDOT:PSS/Graphene Conductive Composite As the Receptor Element for a Bacterial Biosensor","authors":"A. E. Kitova, Yu. V. Plekhanova, S. E. Tarasov, N. A. Klenova, A. N. Reshetilov","doi":"10.1134/S2635167623601493","DOIUrl":"10.1134/S2635167623601493","url":null,"abstract":"<div>Тhe search for new materials with high conductivity and biocompatibility for use in biosensors is an important task. One promising material is bacterial cellulose (BC) due to its high surface area, high porosity, and biocompatibility. In this study, bacterial cellulose is modified with the PEDOT:PSS conductive gel and carbon nanomaterials to increase conductivity. Thermally expanded graphite/BC/PEDOT:PSS/graphene composition is used to immobilize Gluconobacter oxydans acetic-acid bacteria on the surface of a screen-printed carbon electrode. The effect of individual components of the composite on the catalytic activity of bacteria in the presence of 2,6-dichlorophenolindophenol redox mediator is studied. The addition of BC to the composition provides a higher stability of the electrode: the drop in signal within 35 days is 9%. A microbial biosensor based on TEG/PEDOT:PSS/Graphene/BC/G. oxydans composite show better sensitivity (36.4 µA mM–1 cm–2) and lower detection limit (0.005 mM) as well as the widest linear detection range (0.005–2 mM) compared to the other compositions. Thus, bacterial cellulose modified with conductive additives can be applied as a matrix for the immobilization of bacteria in microbial biosensors and microbial fuel cells.</div>","PeriodicalId":716,"journal":{"name":"Nanotechnologies in Russia","volume":"18 2 supplement","pages":"S352 - S359"},"PeriodicalIF":0.8,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140883989","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

Improvement of the Bioavailability of Low-Solubility Drugs by Reprecipitation on Nanostructured Surfaces 通过在纳米结构表面再沉淀提高低溶解度药物的生物利用度

IF 0.8

Nanotechnologies in Russia Pub Date : 2024-03-23 DOI: 10.1134/S2635167623601262

O. D. Smirnova, V. Yu. Musatova, I. V. Kalashnikova, S. V. Aleshin, S. A. Semenov, L. V. Kostryukova, G. E. Morozevich

{"title":"Improvement of the Bioavailability of Low-Solubility Drugs by Reprecipitation on Nanostructured Surfaces","authors":"O. D. Smirnova, V. Yu. Musatova, I. V. Kalashnikova, S. V. Aleshin, S. A. Semenov, L. V. Kostryukova, G. E. Morozevich","doi":"10.1134/S2635167623601262","DOIUrl":"10.1134/S2635167623601262","url":null,"abstract":"<div>Тhis work suggests ways to improve the bioavailability of low-solubility drugs by precipitation from solutions in universal solvents on nanostructured surfaces including nanoparticles (NPs) such as SiO2 and Fe3O4. The same effect is found on metal-polymer composites containing Co, Ni, and Fe obtained from unsaturated dicarboxylates. In both cases, this is achieved by increasing the total desorption surface. The examples of resveratrol and of the preparation of the sum of furocoumarins Ammifurin show an increase of the relative desorption ratio of drugs by two orders of magnitude from the surface of nanostructured CaCO3 particles into aqueous solutions. The results of MTT tests show the comparable effects of Ammifurin and of the used metal-polymer nanocomposites on HeLa cervical cancer cells and human HepG2 liver carcinoma, thereby making their combined use potentially possible. Thus, we propose a way to improve the bioavailability of a wide class of drugs, potentially applicable for all cases when the toxicity of the carrier NPs does not exceed the independent toxicity of the target substance. The possibility of the mutual enhancement of toxicity requires a separate study and is not considered here.</div>","PeriodicalId":716,"journal":{"name":"Nanotechnologies in Russia","volume":"18 2 supplement","pages":"S398 - S406"},"PeriodicalIF":0.8,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140884051","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