![](/events_files/450/revised Banner IOCN 2022 hero.jpg?1723823664)
3rd International Online-Conference on Nanomaterials
25 Apr–10 May 2022
Nanomaterials and Nanostructures, 2D Materials and Graphene, Nanoparticles and Quantum Dots, Nanowires and Nanotubes, Nanobiology and Nanomedicine, Nanophotonics and Plasmonics, Nanoelectronics and Nanodevices, Nanoenergy and Nanocatalysis, Nanofabrication and Nanomanipulation
- Go to the Sessions
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- A. Synthesis, Characterization, and Properties of Nanomaterials
- B. Modeling and Simulation of Nanostructures and Nanodevices
- C. Carbon Nanomaterials, Graphene & 2D Materials
- D. Polymer Nanomaterials, Soft Nanomaterials, Nanocoatings/Thin films, and Nanostructured Surfaces
- E. Magnetism and Magnetic Nanomaterials
- F. Nanomedicine and Nanobiotechnology
- G. Nanotechnology for Catalysis, Electrochemistry, Energy, and Environment
- H. Nanophysics, Nanoelectronics, Nanophotonics, Nanoplasmonics and Nanosensing
- I. Poster
- Event Details
IOCN 2022 has been a success! Welcome to the new electronic conference IOCN 2023.
The IOCN 2022 award winners have been announced.
Best Paper Award
https://sciforum.net/paper/view/12550
Best Poster Award
https://sciforum.net/paper/view/12558
Welcome from the Chairs
Dear Colleagues,
It is my pleasure to invite you to join the 3rd International Online-Conference (IOCN 2022) that is hosted online by: https://sciforum.net/conference/IOCN2022.
Nanomaterials constitute an essential part of modern everyday life, both on holiday and at home. Many things we have been using for a long time contain nanosize components, though frequently we are not aware of them. For instance, mimicking nature's nanotech is becoming a big business. Many research groups around the world have turned to geckos and mussels in order to prepare adhesives that bind to dry and wet surfaces alike. Numerous technologies in the modern world rely on nanostructures, often inspired by evolution in the natural world. However, there is much unexploited potential left to explore.
The scope of IOCN 2022 on Nanomaterials is to cover the whole breadth of nanomaterials research and provide a forum for presenting and discussing new results. Topics of interest include but are not limited to:
- Synthesis, Characterization, and Properties of Nanomaterials (Session A)
- Modeling and Simulation of Nanostructures and Nanodevices (Session B)
- Carbon Nanomaterials, Graphene & 2D Materials (Session C)
- Polymer Nanomaterials, Soft Nanomaterials, Nanocoatings/Thin films, and Nanostructured Surfaces (Session D)
- Magnetism and Magnetic Nanomaterials (Session E)
- Nanomedicine and Nanobiotechnology (Session F)
- Nanotechnology for Catalysis, Electrochemistry, Energy, and Environment (Session G)
- Nanophysics, Nanoelectronics, Nanophotonics, Nanoplasmonics and Nanosensing (Session H)
- Poster (Session I)
IOCN 2022 will be free of charge for presenters and visitors. There will be an opportunity to publish peer-reviewed and accepted papers in a Special Issue in Nanomaterials (https://www.mdpi.com/journal/nanomaterials/special_issues/nano_IOCN2022). MDPI offers a 20% discount on the publication fees for this Special Issue.
We look forward to your contributions.
Sincerely,
Antonio Di Bartolomeo
Conference Secretariat
Mr. Steve YanMDPI Branch Office, Wuhan
E-Mail: iocn2022@mdpi.com
Ms. Rebecca LianMDPI Branch Office, Beijing
E-Mail: iocn2022@mdpi.com
IOCN2022 Live Session Programs
25 April, 2022
Session 1
Date: 25 April 2022
Time: 9:30am - 11:30am (CEST/CET) | 3:30pm - 5:30pm (CST Asia)
Speaker |
Presentation Topic |
Time (CET) |
Conference Chair Prof. Dr. Antonio Di Bartolomeo, Department of Physics “E. R. Caianiello”, University of Salerno, Italy |
Welcome Speech |
9:30am – 9:40am |
Selected Presentations |
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Prof. Dr. Sónia A. C. Carabineiro |
Gold Nanoparticle-Based Catalystss |
9:40am – 10:10am |
Prof. Dr. Junying Zhang |
UV-vis-NIR Active Photocatalysts for Hydrogen Generation |
10:10am – 10:40am |
Dr. Wee-Jun Ong |
Engineering Tunable Nanostructured Photo(electro)catalysts for Clean Energy Applications |
10:40am – 11:10am |
Q&A Session |
11:10am – 11:20am |
|
Closing of Webinar |
11:20am-11:30am |
26 April, 2022
Session 2![](https://ecsa-8.sciforum.net/events_files/456/customs/3b167d068dcc43d36a606791093f03be.png)
Date: 26 April 2022
Time: 9:30am - 11:30am (CEST/CET) | 3:30pm - 5:30pm (CST Asia)
Speaker |
Presentation Topic |
Time (CET) |
Conference Chair Prof. Dr. Andre G. Skirtach Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium |
Welcome Speech |
9:30am – 9:40am |
Selected Presentations |
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Dr. Fernando Torres Andón |
Nanomedicines Loaded with TLR Agonists to Reprogram Tumor-Associated Macrophages for the Treatment of Solid Tumors |
9:40am – 10:10am |
Dr. Olesja Bondarenko |
Enhanced Antibacterial Effect of Nanoparticle Combinations and Wound Dressings Thereof |
10:10am – 10:40am |
Dr. Elisabetta Fanizza |
Design of Functional Nanomaterial and Their Interface for Biomedical Applications |
10:40am – 11:10am |
Q&A Session |
10:55am – 11:10am |
|
Closing of Webinar
|
11:20am – 11:30am |
Live Session Recordings
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Conference Chairs
![](/events_files/450/committee/13b7b58b6c3e10ec32ac81e48be2652d.png?1723823664)
Department of Physics E. R. Caianiello, Università di Salerno, Italy
Dr. Antonio DI BARTOLOMEO is full professor of Experimental Condensed Matter Physics and president of the Physics Education Committee at the University of Salerno, Italy, where he teaches semiconductor device physics and nanoelectronics. His present research interests include: optical and electrical properties of nanostructured materials, such as carbon nanotubes, graphene, and 2D materials; van der Waals heterostructures and Schottky junctions; field-effect transistors, non-volatile memories, solar cells, photodetectors, and field emission devices. He completed his PhD in Physics in 1997 at Salerno University, where he held the position of researcher in Experimental Physics before the appointment as a professor. His scientific career started at CERN (CH) with the collaboration of experiments on neutrino oscillations and heavy-ion collisions. He spent several years in the industry as a semiconductor device engineer (ST Microelectronics, Infineon Technologies, and Intel Corporation) and was a guest scientist at IHP-Microelectronics (Germany) and Georgetown University (Washington, DC). He has authored over 150 publications in peer-reviewed journals, two physics textbooks, and two patents. He currently serves as an Editorial Board member for several journals, including MDPI’s Nanomaterials, Sensors and Electronics.
![](/events_files/450/committee/55ff41c49ea0f203f0b188bca636da7d.jpeg?1723823664)
Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Belgium
Dr. Andre Skirtach is a Professor and Head of the Nano-Biotechnology Group at the Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium. He has an MSc in Physics from Moscow State University of Lomonosov, Russia, and a PhD in Chemistry from McGill University, Montréal, Canada. Immediately after graduation, in 1997, he joined the National Research Council/Conceil national de recherches Canada (NRC) in Ottawa as a post-doctoral fellow and researcher. In 2000, Dr. Skirtach and colleagues were involved in establishing a prominent startup—Trillium Phot., Inc. In 2003, he then moved to the Max-Planck Institute of Colloids and Interfaces, Potsdam, Germany, working initially as a researcher and then as a Group Leader in the Department of Interfaces (headed by Prof. H. Möhwald). Since 2011, Dr. Skirtach is working at the Faculty of Bioscience Engineering, Ghent University, Belgium, leading a Nano-Biotechnology group. He is also a member of Cancer Research Institute of Ghent (CRIG), Advanced Microscopy Center and Nano-Biophotonics center of excellence. Scientific research interests include nanotechnology and nanobiotechnology, nanoparticles and their interactions, polymeric capsules, hydrogel and polymeric planar interfaces, and self-assembly processes, as well as the application and development of microscopic approaches for these and other phenomena. He is a member of the board of several journals, including Nanomaterials (MDPI), and has published over 190 papers (according to Web of Science databases).
![](/events_files/450/committee/79d6d2f97b0df606c73a1a165ad682cd.png?1723823664)
School of Chemistry and Chemical Engineering, Harbin Institute of Technology, China
Dr. Guanying Chen has been a professor at School of Chemistry and Chemical Engineering, Harbin Institute of Technology (HIT), since 2013. He also serves as a research faculty at the Institute for Lasers, Photonics and Biophotonics (ILPB), SUNY Buffalo, since 2011. His research interests focus on lanthanide-doped materials, upconversion, nanocrystals and crystals, biophotonics, and nanostructured solar cells. He has published more than 110 peer-reviewed papers in journals such as Chem. Rev., Chem. Soc. Rev., Acc. Chem. Res., J. Am. Chem. Soc., Adv. Mater., ACS Nano, etc. He has an H index of 47 and more than 11,000 total citations. He received the Top-Notch Young Investigator Award from the Department of the Central Committee of China in 2015, Young Changjiang Professor from Ministry of Education China in 2019, Top 100 National Excellent PhD Dissertation Nomination Award of China in 2011, and the Distinguished Young Investigator Career Award of HIT in 2015. He sits on editorial boards for 6 SCI journals, including Scientific Reports, Nanomaterials, Crystals, Journal of Rare Earths, etc.
Session Chairs
![](/events_files/450/committee/87ba7c25e0b62408cb85513809afe7fe.png?1723823664)
Prof. Dr. Souad Ammar-Merah
Université de Paris, CNRS-UMR 7086, Interfaces, Traitements, Organisation et DYnamique des Systèmes (ITODYS), UFR de Chimie, France
ammarmer@univ-paris-diderot.fr
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Prof. Dr. Chun Zhang
Department of Physics and Chemistry, National University of Singapore, Singapore
phyzc@nus.edu.sg
![](/events_files/450/committee/efcd9cedb9b7770e0962b866ecad2516.png?1723823664)
Prof. Dr. Antonio Di Bartolomeo
Department of Physics E. R. Caianiello, Università di Salerno, Italy
adibartolomeo@unisa.it
![](/events_files/450/committee/f2935178989be3abbd0ad6fea20cb693.png?1723823664)
Prof. Dr. Ullrich Scherf
Bergische Universitat Wuppertal, Germany
scherf@uni-wuppertal.de
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Prof. Dr. Alessandro Lascialfari
Dipartimento di Fisica, Università degli studi di Pavia, Italy
alessandro.lascialfari@unipv.it
![](/events_files/450/committee/39aeeecf2d0028f9fe1693bfffb215c7.png?1723823664)
Prof. Dr. Huanjun Chen
School of Electronics and Information Technology, Sun Yat-sen University, China
chenhj8@mail.sysu.edu.cn
![](/events_files/450/committee/29fdd73c5f71adb412a14457f1affcc0.jpeg?1723823664)
Prof. Dr. Eleonore Fröhlich
Center for Medical Research, Medical University of Graz, Austria
eleonore.froehlich@medunigraz.at
![](/events_files/450/committee/3db0814c366798dc1b12df0307669f66.jpeg?1723823664)
Prof. Dr. Jian-Gan Wang
School of Materials Sciences and Engineering, Northwestern Polytechnical University, China
wangjiangan@nwpu.edu.cn
Conference Committee
![](/events_files/450/committee/7753b27b9f5d0fd98cd5acb72523e6d8.png?1723823664)
Prof. Dr. Le Yu
State Key Lab of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China
yule@mail.buct.edu.cn
Call for Papers
The 3rd International Online-Conference on Nanomaterials (IOCN 2022) will be held from 25 April to 10 May 2022. All proceedings will be held online at https://sciforum.net/conference/IOCN2022.
Throughout this event, we aim to cover the following topics:
- Synthesis, Characterization, and Properties of Nanomaterials
- Modeling and Simulation of Nanostructures and Nanodevices
- Carbon Nanomaterials, Graphene and 2D Materials
- Polymer Nanomaterials, Soft Nanomaterials, Nanocoatings/Thin films, and Nanostructured Surfaces
- Magnetism and Magnetic Nanomaterials
- Nanomedicine and Nanobiotechnology
- Nanotechnology for Catalysis, Electrochemistry, Energy, and Environment
- Nanophysics, Nanoelectronics , Nanophotonics, Nanoplasmonics and Nanosensing
IOCN 2022 will be completely free of charge—both to attend, and for scholars to upload and present their latest work on the conference platform. There will be a possibility to submit selected papers to the journal Nanomaterials, with a 20% discount on the APCs; IOCN 2022 offers you the opportunity to participate in this international, scholarly conference without having the concern or expenditure of travel—all you need is your computer and access to the Internet.
Accepted paper will be published after peer review in a Special Issue in Nanomaterials.
Abstracts (in English) should be submitted by 1 February 2022 online at https://sciforum.net/conference/IOCN2022. For accepted abstracts, the full paper can be submitted by 15 March 2022. The conference itself will be held 25 April to 10 May 2022.
Paper Submission Guidelines
For information about the procedure for submission, peer-review, revision and acceptance of conference proceedings papers, please refer to the section "Instructions for Authors" .
Time Schedule
- 1 February 2022: Abstract Submission Deadline
- 1 March 2022: Abstract Acceptance Notification Deadline
- 15 March 2022: Submission of Conference Proceedings Papers/Posters Deadline
- 25 April - 10 May 2022: Conference Date
- 20 July 2022: Conference Special Issue Paper Deadline
We thank you in advance for your attendance of this conference and look forward to a stimulating exchange.
Instructions for Authors
Submissions should be done by the authors online by registering at https://sciforum.net/conference/IOCN2022, and using the "Start New Submission" function once logged into system.
- Scholars interested in participating with the conference can submit their abstract (about 150-300 words covering the areas of manuscripts for the proceedings issue) online on this website until 1 February 2022.
- The Conference Committee will pre-evaluate, based on the submitted abstract, whether a contribution from the authors of the abstract will be welcome for the IOCN 2022. All authors will be notified by 1 March 2022 about the acceptance of their abstract.
- If the abstract is accepted for this conference, the author is asked to submit his/her manuscript, optionally along with a PowerPoint (only PDF) and/or video presentation of his/her paper, until the submission deadline of 15 March 2022.
- The manuscripts and presentations will be available on https://sciforum.net/conference/IOCN2022 for discussion and rating during the time of the conference 25 April - 10 May 2022 and will be published in Journal Materials Proceedings.
Accepted papers will be published in the proceedings of the conference and journal Nanomaterials will publish the proceedings of the conference as a Special Issue. After the conference, the authors are recommended to submit an extended version of the proceeding papers to the Nanomaterials Special issue with 20% discount on the APC.
Structure of Proceedings Paper
Manuscripts for the proceedings issue must have the following organization:
- Title
- Full author names
- Affiliations (including full postal address) and authors' e-mail addresses
- Abstract
- Keywords
- Introduction
- Methods
- Results and Discussion
- Conclusions
- (Acknowledgements)
- References
Manuscripts should be prepared in MS Word or any other word processor and should be converted to the PDF format before submission. The publication format will be PDF. The manuscript should count at least 3 pages (incl. figures, tables and references). There is no page limit on the length, although authors are asked to keep their papers as concise as possible.
Presentation Slides
Authors are encouraged to prepare a presentation in PowerPoint or similar software, to be displayed online along with the Manuscript. Slides, if available, will be displayed directly in the website using Sciforum.net's proprietary slides viewer. Slides can be prepared in exactly the same way as for any traditional conference where research results can be presented. Slides should be converted to the PDF format before submission so that our process can easily and automatically convert them for online displaying.
Video Presentations
Besides their active participation within the forum, authors are also encouraged to submit video presentations. If you are interested in submitting, please contact the conference organizer at iocn@mdpi.com to get to know more about the procedure. The following formats (.MOV, .MPEG4, .MP4, .AVI, .WMV, .MPEGPS, .FLV) are all allowed. This is an unique way of presenting your paper and discuss it with peers from all over the world. Make a difference and join us for this project.
Submission of Manuscripts
Submission: Manuscripts should be submitted online at https://sciforum.net/conference/IOCN2022 by registering and logging in to this website.
Accepted File Formats
MS Word: Manuscript prepared in MS Word must be converted into a single file before submission. When preparing manuscripts in MS Word, the Electronic Conference on Materials Science Microsoft Word template file (see download below) must be used. Please do not insert any graphics (schemes, figures, etc.) into a movable frame which can superimpose the text and make the layout very difficult.
3rd International Online-Conference on Nanomaterials Microsoft Word template file
For further enquiries please contact us at iocn@mdpi.com.
Manuscript Preparation
Paper Format: A4 paper format, the printing area is 17.5 cm x 26.2 cm. The margins should be 1.75 cm on each side of the paper (top, bottom, left, and right sides).
Formatting / Style: Papers should be prepared following the style of Nanoamterials. The full titles and the cited papers must be given. Reference numbers should be placed in square brackets [ ], and placed before the punctuation; for example [4] or [1-3], and all the references should be listed separately and as the last section at the end of the manuscript.
Authors List and Affiliation Format: Authors' full first and last names must be given. Abbreviated middle name can be added. For papers written by various contributors a corresponding author must be designated. The PubMed/MEDLINE format is used for affiliations: complete street address information including city, zip code, state/province, country, and email address should be added. All authors who contributed significantly to the manuscript (including writing a section) should be listed on the first page of the manuscript, below the title of the article. Other parties, who provided only minor contributions, should be listed under Acknowledgments only. A minor contribution might be a discussion with the author, reading through the draft of the manuscript, or performing English corrections.
Figures, Schemes and Tables: Authors are encouraged to prepare figures and schemes in color. Full color graphics will be published free of charge. Figure and schemes must be numbered (Figure 1, Scheme I, Figure 2, Scheme II, etc.) and an explanatory title must be added. Tables should be inserted into the main text, and numbers and titles for all tables supplied. All table columns should have an explanatory heading. Please supply legends for all figures, schemes and tables. The legends should be prepared as a separate paragraph of the main text and placed in the main text before a table, a figure or a scheme
Presentation of Posters
Authors that wish to present only a poster, i.e., without a proceedings paper, can do so in section I. Posters will be available on the conference website during and after the event. Similarly to papers presented at the conference, participants will be able to ask questions and make comments about the posters. Posters that are submitted without a paper will not be included in the proceedings of the conference.
General information on the posters and poster sessions can be found by clicking here.
Potential Conflicts of Interest
It is the authors' responsibility to identify and declare any personal circumstances or interests that may be perceived as inappropriately influencing the representation or interpretation of clinical research. If there is no conflict, please state here "The authors declare no conflict of interest." This should be conveyed in a separate "Conflict of Interest" statement preceding the "Acknowledgments" and "References" sections at the end of the manuscript. Financial support for the study must be fully disclosed under "Acknowledgments" section. It is the authors' responsibility to identify and declare any personal circumstances or interests that may be perceived as inappropriately influencing the representation or interpretation of clinical research. If there is no conflict, please state here "The authors declare no conflict of interest." This should be conveyed in a separate "Conflict of Interest" statement preceding the "Acknowledgments" and "References" sections at the end of the manuscript. Financial support for the study must be fully disclosed under "Acknowledgments" section.
Copyright
MDPI, the publisher of the Sciforum.net platform, is an open access publisher. We believe that authors should retain the copyright to their scholarly works. Hence, by submitting a Communication paper to this conference, you retain the copyright of your paper, but you grant MDPI AG the non-exclusive right to publish this paper online on the Sciforum.net platform. This means you can easily submit your paper to any scientific journal at a later stage and transfer the copyright to its publisher (if required by that publisher).
Sessions
B. Modeling and Simulation of Nanostructures and Nanodevices
C. Carbon Nanomaterials, Graphene & 2D Materials
D. Polymer Nanomaterials, Soft Nanomaterials, Nanocoatings/Thin films, and Nanostructured Surfaces
E. Magnetism and Magnetic Nanomaterials
F. Nanomedicine and Nanobiotechnology
G. Nanotechnology for Catalysis, Electrochemistry, Energy, and Environment
H. Nanophysics, Nanoelectronics, Nanophotonics, Nanoplasmonics and Nanosensing
I. Poster
List of accepted submissions (54)
Id | Title | Authors | Presentation Video | Poster PDF | |||||||||||||||||||||||||||||||||||||
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sciforum-058012 |
Simulation of Indirect 13C–13C J-Coupling Tensors in Diamond Clusters Hosting the NV Center |
,
,
Semen Kuten ,
Dominik Michels ,
,
Nikolai Kargin ,
|
N/A | N/A |
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In the past decade there was rapid progress in development of quantum magnetic sensing technology based on nitrogen-vacancy (NV) color centers in diamond (see, e.g. [1,2] for recent reviews). Magnetometer based on single NV center can have nanometer-scale spatial resolution and exceptional sensitivity (up to ~Hz) allowing to detect target single 13C nuclear spins or coupled 13C-13C pairs located within the diamond which can be used as long-lived quantum memory [3]. Moreover, NV-based magnetometer allows to distinguish (by their chemical shifts) inequivalent nulear spins of molecules located at diamond surface [4], thus enabling new exciting research area of single-spin nuclear magnetic resonance (NMR) for investigating important issues ranging from determination of molecular structures of inorganic/biological compounds up to medical imaging for therapeutic matters. In these respects, predicting of high-resolution NMR characteristics for studied spin systems is essential. Among them, those of indirect nuclear spin–spin coupling (the J-coupling), that arise due to second-order hyperfine interactions, are important. Here we are presenting for a first time the results of simulation of full tensors JKL (K,L=X,Y,Z) describing the J-couplings of nucler spins 13C in H-terminated NV-hosting diamond clusters. We have optimized the cluster geometry using the ORCA 5.0.1 software package with the B3LYP/def2/J/RIJCOSX level of theory and then simulated the n-bond J-coupling tensors nJKL for all possible 13C-13C pairs in the clusters using B3LYP/TZVPP/AUTOAUX/decontract level of theory. We found that, in addition to usually considered isotropic Fermi-contact contribution to JKL, the anisotropic contributions resulted from dia- and paramagnetic, spin-dipolar and spin-dipolar/Fermi-contact cross terms are essential and can manifest in NMR spectra of 13C dimers recorded using the NV centers. Using simlated tensors nJKL we calculated the values of scalar J-constants nJ=Sp(nJKL)/3 for different 13Ci-13Cj pairs in the examplary C33[NV]-H36 cluster. The highest ones are those for neighboring 13C: one-bond constant 1J were 30-37 Hz depending on the position of the 13C dimer in the cluster with respect to the NV center. Moreover, using the same theory level we also simulated full tensors nJKL for the adamantane and found that for this molecule the calculated value 1J = Sp(1JKL)/3=29.9 Hz correlates well with the isotropic constant 1J=31.4 Hz obtained experimentally in [5]. References [1] Schwartz I. et al. Blueprint for nanoscale NMR. Scientific Reports. 9 (2019) 6938. [2] Barry J.F. et al. Sensitivity optimization for NV-diamond magnetometry. Rev. Mod. Phys. 92 (2020) 015004. [3] Chen Q. et al. Steady-state preparation of long-lived nuclear spin singlet pairs at room temperature. Phys. Rev. B. 95 (2017) 224105. [4] Glenn D.R. et al. High-resolution magnetic resonance spectroscopy using a solid-state spin sensor. Nature.555 (2018) 351. [5] Gay I.D. et al, INADEQUATE in the Solid State. HomonuclearCouplings in [(CH3)2SnE]3. J .Magn. Res. 91 (1991) 185. |
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sciforum-058015 |
Novel Electrodes Based on the Electropolymerized Nanocoatings for the Selective Voltammetric Quantification of Flavanones |
, , | N/A | N/A |
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Chemically modified electrodes are one of the most intensively developed areas in modern electroanalysis due to the appearance of a wide range of nanomaterials used as sensitive layers. One of the approaches for electrode surface modification is the coverage with the electropolymerized films based on phenolic compounds. Among a wide range of analytes, flavanones – flavonoids of Citrus fruits are less investigated in comparison to other natural phenolics and almost out of consideration in electroanalysis. The major natural flavanones are naringin and hesperidin which control in the real samples is required due to the possible prooxidant effect. Novel electrodes based on a layer-by-layer combination of carbon nanotubes and electropolymerized ellagic acid or aluminon were developed for the direct quantification of naringin and hesperidin. Conditions of monomers' potentiodynamic electropolymerization were optimized. SEM and electrochemical methods were used for the electrode surface characterization . The parameters of flavanones electrooxidation on the modified electrodes were found. A glassy carbon electrode (GCE) modified with multi-walled carbon nanotubes and electropolymerized ellagic acid was developed for selective naringin determination. Simultaneous voltammetric quantification of naringin and hesperidin was shown for the first time using GCE modified with polyaminobenzene sulfonic acid functionalized single-walled carbon nanotubes and polyaluminon. The analytical characteristics obtained were significantly improved in comparison to other methods including electrochemical approaches. High selectivity of the electrodes’ response to flavanones in the presence of typical interferences and structurally related compounds was confirmed. The approaches developed were successfully applied for the analysis of citrus juices and a good agreement with the independent methods was shown. Thus, the novel highly sensitive and selective voltammetric methods for the direct flavanone quantification characterized by the simplicity of electrode fabrication, reliability, cost-efficiency can be applied for routine analysis as an alternative to chromatographic methods. |
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sciforum-058028 | Resonance Fluorescence of a Quantum Dot near a Metallic Nanoparticle: Quantum Interference Effects | , , , | N/A | N/A |
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In recent years, significant attention has been given to the quantum or nonlinear optical properties of semiconductor quantum dots coupled to plasmonic (metal or metal-dielectric) nanostructures. This happens as the optical properties of quantum dots can be modified, enhanced and efficiently controlled, when placed in the vicinity of plasmonic nanostructures. Among the various quantum optical effects that have been studied in coupled quantum dot – plasmonic nanostructures, particular attention has been given to the modification of the resonance fluorescence spectrum of the quantum dot by the presence of the plasmonic nanostructure, which mainly occurs due to the modification of the spontaneous decay rate of the quantum dot near the plasmonic nanostructure. The most common plasmonic nanostructure that has been studied is the metallic (mainly gold or silver) nanosphere and in most studies the quantum dot is modeled as a two-level quantum system. In this work, we model the quantum dot structure with a three-level V-type quantum system, which can naturally arise in quantum dots, and study the resonance fluorescence spectrum near a metallic nanosphere. We show that the present system leads to quantum interference effects due to the presence of the metallic nanoparticle and specifically due to the anisotropic Purcell effect that occurs in the photon emission of the quantum dot near the metallic nanosphere. We then study the resonance fluorescence spectrum for different distances between the quantum dot and the metallic nanosphere and show that the resonance fluorescence spectrum changes significantly from a single peak spectrum to a multipeak spectrum, an effect that can be explained using a dressed state analysis. The effects of quantum interference in the resonance fluorescence spectrum are also explored. |
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sciforum-058066 |
Hybrid Inorganic-Organic Membranes Based on Iron-Encapsulated Carbon Nanotubes and Their Application in CO2 Separation |
,
,
,
,
Waldemar Kaszuwara
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N/A |
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Nowadays, considering the problems with climate change and global warming caused by the increase in greenhouse gas emissions, mainly CO2, (mainly from energy production and transport), there was a need to reduce it. Conventional methods are very energy intensive. Therefore, alternative methods, such as membrane technologies and appropriate materials, are being searched for. In this work, we present the new data concerning the novel type of hybrid organic-inorganic membranes Fe@MWCNT-OH/FeSPEEK with a new kind of CNTs with increased iron-encapsulated content, characterization of their magnetic, mechanical, thermal, gas transport parameters, and their potential application in CO2 separation. It was found that incorporation of nanofillers with increased iron content (5.80 wt%) into the modified polymer matrix had significantly improved magnetic, thermal, mechanical, and gas transport (D, P, S, and αCO2/N2) parameters of analyzed membranes, especially after application of magnetic casting and chemical modification of inorganic and organic phase. Magnetic casting has improved the alignment and dispersion of Fe@MWCNTs. At the same time, CNT's and polymer chemical modification increased interphase compatibility, CO2 affinity and membrane’s separation efficiency. The obtained novel composites were characterized by improved thermooxidative stability, mechanical (extremely especially important in high-pressure processes), and magnetic parameters, which rise with the increase of CNT loading. It was also stated that Cherazi’s model turned out to be suitable for describing the CO2 transport through analyzed hybrid membranes. The enhanced parameters of obtained membranes could translate directly to their future potential use in gas separation. This type of solution in the form of selective membranes for CO2 separation, e.g., from flue gases from coal combustion, may find future applications in the power industry. |
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sciforum-058097 |
Self-Assembly of Polydisperse Y-Shaped Polymer Brushes under Good Solvent Conditions |
Petr Fridrich ,
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N/A | N/A |
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Polymers attached to the surface, e.g. polymer brushes, represent a unique way how to functionalize the surface. Its morphology is controlled by brush parameters such as grafting density, composition, chemical nature etc. and determine the response of the surface to external environment. Mixed binary brushes contain two different homopolymer branches attached to single point on the surface and exhibit a wide range of morphologies ranging from aggregates to ripple structure. Compositional fluctuations during the grafting process that hampers formation of morphology can be controlled by using Y-shaped initiators where each deposition point accepts different type of polymer. Phase behavior of Y-shaped brushes is described in theory and by simulation studies mainly for monodisperse cases. Nevertheless, real polymers are always polydisperse and using highly polydisperse polymer brings new options to control the formation of surface morphology. Here, we employ Dissipative Particle Dynamics (DPD) to study the influence of polydispersity on self-assembly of Y-shaped polymer brushes. We vary brush grafting density, composition of the branches and their incompatibility to describe complex behavior of brushes at good solvent conditions. Moreover, we introduce the polydispersity by varying chain length of one branch and keeping other branch of the brush monodisperse. We consider low and high polydispersity and restrict our investigations to polydispersity indexes (PDI) that are used in experiments. We model the polydispersity by Schultz-Zimm distribution. We show that our results for monodisperse systems agree with previous experimental and theoretical works and that ripple structure and aggregates are observed. Furthermore, the scaling of the brush height in our model agrees with theoretical predictions and with previous modeling results. In polydisperse systems, only disordered structures or aggregates are assembled by brushes with PDI < 1.5 sparsely grafted onto the surface with grafting density lower that 0.1 chains/nm2. Moreover, increasing the grafting density above 0.5 chains/nm2 triggers formation of perforated layer (PL) that is not observed in monodisperse systems. PL phase window widens with increasing the PDI up to 2 and the grafting density up to 1.0 chains/nm2. At high grafting densities and PDIs the PL phase is stable over wide range of phase diagram. Finally, we show that increasing PDI lead to asymmetry of phase diagrams. High content of polydisperse chains prefer formation of aggregates over the ripple structure and increase the order-disorder transition while high content of monodisperse chains favours ripple structure and lowers the order-disorder transition. |
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