Image Journal of Advanced Materials and Technologies最新文献_第4页

Laser-induced methods for obtaining carbon nanomaterials in liquid nitrogen under femtosecond radiation 飞秒辐射下在液氮中激光诱导获得碳纳米材料的方法

Image Journal of Advanced Materials and Technologies Pub Date : 2021-07-02 DOI: 10.17277/jamt.2021.02.pp.101-112

K. Khorkov, V. G. Prokoshev, S. Arakelian

{"title":"Laser-induced methods for obtaining carbon nanomaterials \u0000in liquid nitrogen under femtosecond radiation","authors":"K. Khorkov, V. G. Prokoshev, S. Arakelian","doi":"10.17277/jamt.2021.02.pp.101-112","DOIUrl":"https://doi.org/10.17277/jamt.2021.02.pp.101-112","url":null,"abstract":"The paper presents the experimental results of nanostructures formation under the influence of femtosecond laser radiation on carbon samples at liquid nitrogen temperatures. Two femtosecond laser systems were used to study the processes of laser action on highly oriented pyrolytic graphite and glassy carbon samples in liquid nitrogen: titanium-sapphire laser system with wavelength 800 nm, pulse duration 50 fs, energy 1 mJ, and repetition frequency of 1 kHz; ytterbium laser system with wavelength 1030 nm, pulse duration 280 fs, energy 150 µJ, and repetition frequency \u0000of 10 kHz. Cryostats, including those with the possibility of observing the laser action process, were collected for the experiments. As a result of laser action on the surface of the processed carbon samples, sheets of exfoliated graphene of various sizes and shapes (sheets, tapes, crumpled graphene), as well as nanostructures in the form of nanopeaks, were obtained. The mechanisms of graphene exfoliation under femtosecond laser action in liquid nitrogen, consisting \u0000in intercalation and further heating of nitrogen molecules in the interplanar space of graphite, were proposed. \u0000The possibilities of further research and development of technologies for graphene formation using laser radiation are presented.","PeriodicalId":13355,"journal":{"name":"Image Journal of Advanced Materials and Technologies","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84953275","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

Fluorinated polymers: evaluation and characterization of structure and composition 含氟聚合物:结构和组成的评价和表征

Image Journal of Advanced Materials and Technologies Pub Date : 2021-07-02 DOI: 10.17277/jamt.2021.02.pp.144-155

A. Ivanov, N. Belov

{"title":"Fluorinated polymers: \u0000evaluation and characterization of structure and composition","authors":"A. Ivanov, N. Belov","doi":"10.17277/jamt.2021.02.pp.144-155","DOIUrl":"https://doi.org/10.17277/jamt.2021.02.pp.144-155","url":null,"abstract":"The proposed review represents the systematic analysis of modern methods and approaches for the characterization and structural evaluation of fluorinated polymers that have found a wide application as materials for chemical processing, chemically resistant components and coatings, pharmaceutical and electrical packaging, biomedical equipment, etc. The chemical composition of the polymers (fluorine content, its distribution inside the fluorinated materials, chemical bonds, presence of oxygen-containing groups) substantially influences on the operation properties (chemical resistance, adhesive, cohesive, optical, dielectrical, thermal, barrier, gas permeation) of the final polymeric products. Hence, it was of particularly importanсe to bond the emergence of specific features with the presence of fluorine in the chemical structure of polymer by means of related analytical techniques. Namely, we focused on spectral \u0000(IR, UV-VIS, NMR, XPS, EPR), chemical (elemental analysis), Secondary-ion mass spectroscopic (SIMS) and microscopic (AFM, SEM-EDX) methods emphasizing their general consideration and limitations as well as application for the in-depth characterization.","PeriodicalId":13355,"journal":{"name":"Image Journal of Advanced Materials and Technologies","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82423391","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: 2

Generation of high-intensity ultra-short optical pulses: 2018 Nobel Prize Winners in Physics Gerard Mourou and Donna Strickland 产生高强度超短光脉冲:2018年诺贝尔物理学奖得主杰拉德·莫罗和唐娜·斯特里克兰

Image Journal of Advanced Materials and Technologies Pub Date : 2021-07-02 DOI: 10.17277/jamt.2021.02.pp.087-090

V. M. Tyutyunnik

{"title":"Generation of high-intensity ultra-short optical pulses: \u00002018 Nobel Prize Winners in Physics \u0000Gerard Mourou and Donna Strickland","authors":"V. M. Tyutyunnik","doi":"10.17277/jamt.2021.02.pp.087-090","DOIUrl":"https://doi.org/10.17277/jamt.2021.02.pp.087-090","url":null,"abstract":"In the early 1980s, French physicist G. Mourou and his Canadian collaborator D. Strickland solved the problem of power drop by dispersing in time and space the processes of amplification and compression: a method of obtaining super-powerful chirped laser pulses (CPA – chirped pulse amplification). The paper presents brief biographical references to Mourou and Strickland. The 2018 Nobel Prize in Physics was awarded “for groundbreaking inventions in the field of laser physics”: Artur Isidorovich Ashkin (Ashkinazi, born 02.09.1922, USA), half of the prize “for the optical tweezers and their application to biological systems”; Gerard Albert Mourou and Donna Theo Strickland (became the third woman to be awarded the Nobel Prize in Physics) (quarterly premium) “for their method of generating high-intensity, ultra-short optical pulses”. Since that time all lasers have been built on a new principle: after the amplifiers place \u0000a compressor from diffraction bars. Instead of simply amplifying the pulse, it is first spread out on spectral components spread over time, then they are amplified separately, then again assembled into a single pulse. At each point in time, only \u0000a fraction of the pulse is amplified, not the entire pulse, allowing for a much higher peak intensity of laser light flow.","PeriodicalId":13355,"journal":{"name":"Image Journal of Advanced Materials and Technologies","volume":"59 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78631231","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

Features of oxidative functionalization of multiwalled carbon nanotubes 多壁碳纳米管氧化功能化特性研究

Image Journal of Advanced Materials and Technologies Pub Date : 2021-07-02 DOI: 10.17277/jamt.2021.02.pp.091-100

T. Dyachkova, E. Tugolukov, E. Burakova, Y. Khan, A. Pasko, A. Smirnova, N. Usol'tseva

{"title":"Features of oxidative functionalization of multiwalled carbon nanotubes","authors":"T. Dyachkova, E. Tugolukov, E. Burakova, Y. Khan, A. Pasko, A. Smirnova, N. Usol'tseva","doi":"10.17277/jamt.2021.02.pp.091-100","DOIUrl":"https://doi.org/10.17277/jamt.2021.02.pp.091-100","url":null,"abstract":"The paper studies the oxidation laws of multiwalled carbon nanotubes (MWCNTs) of various types, which differ in geometric parameters (diameter, length, specific surface), using nitric acid. In different experiments, the duration of oxidation, the concentration of nitric acid, and the consumption of HNO3 per 1 g of MWCNTs were varied. \u0000The qualitative composition of the formed oxygen-containing functional groups and the changes occurring with the graphene layers of nanotubes were established by the methods of IR and Raman spectroscopy, and transmission electron microscopy. The total oxygen content in the samples was determined by energy dispersive analysis. The degree of MWCNTs functionalization with acidic functional groups was determined by Boehm titration. An X-ray structural analysis of the obtained samples was carried out and their specific surface area was estimated. \u0000It was determined that the most serious changes in the functionalization degree occurred during the first 1–3 hours of oxidation. During this time interval, the achieved values of the functionalization degree were determined mainly by the shape of the MWCNTs graphene layers. At 7–10 hours of treatment, regardless of the initial parameters, MWCNTs have the functionalization degree in the range of 0.5–0.7 mmoLg–1. At the initial stage of oxidation, the amorphous phase is removed. Using dilute solutions of nitric acid does not allow obtaining oxidized nanotubes with the high functionalization degree. It is expedient to reduce the consumption of 65 % HNO3 to 40 mL per 1 g of MWCNTs.","PeriodicalId":13355,"journal":{"name":"Image Journal of Advanced Materials and Technologies","volume":"86 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88164970","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

Synthesis and properties of Pt/TiN catalyst for low-temperature air purification from carbon monoxide 一氧化碳低温空气净化用Pt/TiN催化剂的合成及性能研究

Image Journal of Advanced Materials and Technologies Pub Date : 2021-07-02 DOI: 10.17277/jamt.2021.02.pp.131-143

E. Kabachkov, E. N. Kurkin, N. N. Vershinin, I. L. Balikhin, V. Berestenko, A. Michtchenko, Y. Shulga

引用次数: 1

Cu–Fe nanoparticles containing nanocomposites: synthesis, stabilization and antibacterial activity 含Cu-Fe纳米复合材料:合成、稳定性及抗菌活性

Image Journal of Advanced Materials and Technologies Pub Date : 2021-07-02 DOI: 10.17277/jamt.2021.02.pp.122-130

O. Bakina, A. Lozhkomoev, E. Glazkova, E. Vornakova, V. R. Chzhou, M. Lerner

{"title":"Cu–Fe nanoparticles containing nanocomposites: \u0000synthesis, stabilization and antibacterial activity","authors":"O. Bakina, A. Lozhkomoev, E. Glazkova, E. Vornakova, V. R. Chzhou, M. Lerner","doi":"10.17277/jamt.2021.02.pp.122-130","DOIUrl":"https://doi.org/10.17277/jamt.2021.02.pp.122-130","url":null,"abstract":"Currently, soft hydrogels with antimicrobial properties are widely used in biomedical applications as dressings and wound healing agents. In the present work, Cu–Fe nanoparticles with different component ratios were obtained by the joint electric explosion of iron and copper wires in an argon atmosphere. Bimetallic nanoparticles had a clear interface between the iron and copper phases at the particle level. Cu–Fe nanoparticles had high antibacterial activity against a wide bacterial spectrum. In connection with dusting and entrainment of nanoparticles, for the convenience of biomedical application, compositions were created based on non-toxic biocompatible polymers – polyvinyl alcohol, polyacrylic acid, and polyacrylamide. The suspension of nanoparticles was pretreated with ultrasound for 5 min at a frequency of 22.4 kHz. Polyvinyl alcohol was used as a nanoparticle stabilizer. The stability of the suspension was investigated by the sedimentation method. The resulting compositions effectively inhibited the growth of Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 6538, methicillin-resistant Staphylococcus aureus ATCC 43300 (MRSA), and Pseudomonas aeruginisa ATCC 9027.","PeriodicalId":13355,"journal":{"name":"Image Journal of Advanced Materials and Technologies","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86631629","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

Healthcare Robots: 3D Origami Sensing Robots for Cooperative Healthcare Monitoring (Adv. Mater. Technol. 3/2021) 医疗保健机器人:用于合作医疗监测的3D折纸传感机器人。抛光工艺。3/2021)

Image Journal of Advanced Materials and Technologies Pub Date : 2021-03-01 DOI: 10.1002/ADMT.202170017

Tae-Ho Kim, J. Vanloo, W. Kim

引用次数: 0

Cellulose‐Based Nanogenerators: An Overview of Cellulose‐Based Nanogenerators (Adv. Mater. Technol. 3/2021) 纤维素基纳米发电机:纤维素基纳米发电机概述(Adv. Mater.)抛光工艺。3/2021)

Image Journal of Advanced Materials and Technologies Pub Date : 2021-03-01 DOI: 10.1002/ADMT.202170018

Pratheep K Annamalai, A. Nanjundan, D. Dubal, Jong‐Beom Baek

引用次数: 0

Quartz‐Based Cantilevers: Soft‐Chemistry‐Assisted On‐Chip Integration of Nanostructured α‐Quartz Microelectromechanical System (Adv. Mater. Technol. 3/2021) 基于石英的悬臂梁:软化学辅助的纳米结构α -石英微机电系统片上集成。抛光工艺。3/2021)

Image Journal of Advanced Materials and Technologies Pub Date : 2021-03-01 DOI: 10.1002/ADMT.202170014

Claire Jolly, A. Gómez, D. Sánchez-Fuentes, D. Çakıroğlu, R. Rathar, Nicolas Maurin, R. Garcia-Bermejo, B. Charlot, M. Gich, M. Bahriz, L. Picas, A. Carretero-Genevrier

引用次数: 0

Sonolithography: Sonolithography: In‐Air Ultrasonic Particulate and Droplet Manipulation for Multiscale Surface Patterning (Adv. Mater. Technol. 3/2021) 超声光刻技术:用于多尺度表面图案的空气超声颗粒和液滴操作(Adv. Mater)。抛光工艺。3/2021)

Image Journal of Advanced Materials and Technologies Pub Date : 2021-03-01 DOI: 10.1002/ADMT.202170013

J. Shapiro, B. Drinkwater, A. Perriman, Mike Fraser

引用次数: 0