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Article ; Online: Airborne magnetic nanoparticles may contribute to COVID-19 outbreak: Relationships in Greece and Iran.

Martinez-Boubeta, C / Simeonidis, K

2021 Volume 204, Issue Pt B, Page(s) 112054

Abstract: This work attempts to shed light on whether the COVID-19 pandemic rides on airborne pollution. In particular, a two-city study provides evidence that ... ...

Abstract	This work attempts to shed light on whether the COVID-19 pandemic rides on airborne pollution. In particular, a two-city study provides evidence that PM
MeSH term(s)	Air Pollutants/analysis ; Air Pollution/adverse effects ; Air Pollution/analysis ; COVID-19 ; Greece/epidemiology ; Humans ; Iran/epidemiology ; Magnetite Nanoparticles ; Pandemics ; Particulate Matter/analysis ; Particulate Matter/toxicity ; SARS-CoV-2
Chemical Substances	Air Pollutants ; Magnetite Nanoparticles ; Particulate Matter
Language	English
Publishing date	2021-09-20
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	205699-9
ISSN	1096-0953 ; 0013-9351
ISSN (online)	1096-0953
ISSN	0013-9351
DOI	10.1016/j.envres.2021.112054
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Article: Airborne magnetic nanoparticles may contribute to COVID-19 outbreak: Relationships in Greece and Iran

Martinez-Boubeta, C. / Simeonidis, K.

Environmental research. 2022 Mar., v. 204

2022

Abstract: This work attempts to shed light on whether the COVID-19 pandemic rides on airborne pollution. In particular, a two-city study provides evidence that PM₂.₅ contributes to the timing and severity of the epidemic, without adjustment for confounders. The ... ...

Abstract	This work attempts to shed light on whether the COVID-19 pandemic rides on airborne pollution. In particular, a two-city study provides evidence that PM₂.₅ contributes to the timing and severity of the epidemic, without adjustment for confounders. The publicly available data of deaths between March and October 2020, updated it on May 30, 2021, and the average seasonal concentrations of PM₂.₅ pollution over the previous years in Thessaloniki, the second-largest city of Greece, were investigated. It was found that changes in coronavirus-related deaths follow changes in air pollution and that the correlation between the two data sets is maximized at the lag time of one month. Similar data from Tehran were gathered for comparison. The results of this study underscore that it is possible, if not likely, that pollution nanoparticles are related to COVID-19 fatalities (Granger causality, p < 0.05), contributing to the understanding of the environmental impact on pandemics.
Keywords	COVID-19 infection ; air pollution ; environmental impact ; magnetism ; research ; Greece ; Iran
Language	English
Dates of publication	2022-03
Publishing place	Elsevier Inc.
Document type	Article
ZDB-ID	205699-9
ISSN	1096-0953 ; 0013-9351
ISSN (online)	1096-0953
ISSN	0013-9351
DOI	10.1016/j.envres.2021.112054
Database	NAL-Catalogue (AGRICOLA)

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Article: Mapping the Magnetic Coupling of Self-Assembled Fe

López-Conesa, Lluís / Martínez-Boubeta, Carlos / Serantes, David / Estradé, Sonia / Peiró, Francesca

Materials (Basel, Switzerland)

2021 Volume 14, Issue 4

Abstract: The nanoscale magnetic configuration of self-assembled groups of magnetite 40 nm cubic nanoparticles has been investigated by means of electron holography in the transmission electron microscope (TEM). The arrangement of the cubes in the form of chains ... ...

Abstract	The nanoscale magnetic configuration of self-assembled groups of magnetite 40 nm cubic nanoparticles has been investigated by means of electron holography in the transmission electron microscope (TEM). The arrangement of the cubes in the form of chains driven by the alignment of their dipoles of single nanocubes is assessed by the measured in-plane magnetic induction maps, in good agreement with theoretical calculations.
Language	English
Publishing date	2021-02-06
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2487261-1
ISSN	1996-1944
ISSN	1996-1944
DOI	10.3390/ma14040774
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Airborne magnetic nanoparticles: environmental risk factors for the transmission of SARS-CoV-2

Martinez-Boubeta, Carlos / Simeonidis, Konstantinos

medRxiv

Abstract: Objectives To examine the impact of concentrations of ambient fine particulate matter (PM2.5) air pollution on the incidence of COVID-19. Methods Publicly available data of COVID-19 deaths in March/October 2020 were compared with concentrations of PM2.5 ... ...

Abstract	Objectives To examine the impact of concentrations of ambient fine particulate matter (PM2.5) air pollution on the incidence of COVID-19. Methods Publicly available data of COVID-19 deaths in March/October 2020 were compared with concentrations of PM2.5 measured in previous years at urban and suburban areas in Thessaloniki. Similar publicly available data of PM2.5 concentrations from Tehran were gathered for comparison. Cross-correlation and Granger causality analysis were performed in order to assess linkage. Results On the one hand, the mean PM2.5 concentrations in Thessaloniki were significantly higher in the winter, however the magnetic fraction of particulate matter in the autumn is twice its annual average, suggesting that traffic-related emissions alone may not explain the entire variability of PM2.5. On the other hand, it is implied that changes in coronavirus-related deaths follow changes in airborne magnetite, with the correlation between the two data sets being maximized at the lag time of one-month. Further insight is provided by the monthly pattern of PM2.5 mass concentrations in Tehran. We find that air pollution Granger causes COVID-19 deaths (p<0.05). Conclusions A significant association has been found between PM2.5 values and the impact of the COVID-19 pandemic on a bunch of regions. Reported links between pollution levels, climate conditions and other factors affecting vulnerability to COVID-19 may instead reflect inhalation exposure to magnetic nanoparticles. A hypothesis has been set that ubiquitous airborne magnetite pollution, together with certain climatic conditions, may promote a longer permanence of the viral particles in the air, thus favoring transmission.
Keywords	covid19
Language	English
Publishing date	2020-12-11
Publisher	Cold Spring Harbor Laboratory Press
Document type	Article ; Online
DOI	10.1101/2020.12.10.20247130
Database	COVID19

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Article ; Online: Tin Oxide Nanoparticles via Solar Vapor Deposition for Hexavalent Chromium Remediation.

Simeonidis, Konstantinos / Kalaitzidou, Kyriaki / Asimakidou, Theopoula / Martinez-Boubeta, Carlos / Makridis, Antonios / Haeussler, Anita / Vourlias, Georgios / Balcells, Lluis

ACS applied nano materials

2023 Volume 6, Issue 15, Page(s) 13902–13911

Abstract: Tin oxide nanoparticles optimized to capture low concentrations of hexavalent chromium from water were developed through a facile, scalable, and low-cost one-step solar vapor deposition methodology. Considering the preservation of high electron donation ... ...

Abstract	Tin oxide nanoparticles optimized to capture low concentrations of hexavalent chromium from water were developed through a facile, scalable, and low-cost one-step solar vapor deposition methodology. Considering the preservation of high electron donation capacity as the key to support the reduction of mobile Cr(VI) into insoluble forms, the growth of SnO nanoparticles was favored by the co-evaporation of SnO
Language	English
Publishing date	2023-07-07
Publishing country	United States
Document type	Journal Article
ISSN	2574-0970
ISSN (online)	2574-0970
DOI	10.1021/acsanm.3c01567
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Magnetic nanoparticles: An indicator of health risks related to anthropogenic airborne particulate matter.

Kermenidou, M / Balcells, Ll / Martinez-Boubeta, C / Chatziavramidis, A / Konstantinidis, I / Samaras, T / Sarigiannis, D / Simeonidis, K

Environmental pollution (Barking, Essex : 1987)

2020 Volume 271, Page(s) 116309

Abstract: Due to their small dimensions, airborne particles are able to penetrate through inhalation into many human organs, from the lungs to the cardiovascular system and the brain, which can threaten our health. This work establishes a novel approach of ... ...

Abstract	Due to their small dimensions, airborne particles are able to penetrate through inhalation into many human organs, from the lungs to the cardiovascular system and the brain, which can threaten our health. This work establishes a novel approach of collecting quantitative data regarding the fraction, the composition and the size distribution of combustion-emitted particulate matter through the magnetic characterization and analysis of samples received by common air pollution monitoring. To this end, SQUID magnetometry measurements were carried out for samples from urban and suburban areas in Thessaloniki, the second largest city of Greece, taking into consideration the seasonal and weekly variation of airborne particles levels as determined by occurring traffic and meteorological conditions. The level of estimated magnetically-responding atmospheric particulate matter was at least 0.5 % wt. of the collected samples, mostly being present in the form of ultrafine particles with nuclei sizes of approximately 14 nm and their aggregates. The estimated quantities of magnetic particulate matter show maximum values during autumn months (0.8 % wt.) when increased commuting takes place, appearing higher in the city center by up to 50% than those in suburban areas. In combination with high-resolution transmission electron imaging and elemental analysis, it was found that Fe
MeSH term(s)	Air Pollutants/analysis ; Air Pollution/analysis ; Cities ; Environmental Monitoring ; Greece ; Humans ; Magnetite Nanoparticles ; Particle Size ; Particulate Matter/analysis
Chemical Substances	Air Pollutants ; Magnetite Nanoparticles ; Particulate Matter
Language	English
Publishing date	2020-12-16
Publishing country	England
Document type	Journal Article
ZDB-ID	280652-6
ISSN	1873-6424 ; 0013-9327 ; 0269-7491
ISSN (online)	1873-6424
ISSN	0013-9327 ; 0269-7491
DOI	10.1016/j.envpol.2020.116309
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Article: Magnetic nanoparticles: An indicator of health risks related to anthropogenic airborne particulate matter

Kermenidou, M / Balcells, Ll / Martinez-Boubeta, C / Chatziavramidis, A / Konstantinidis, I / Samaras, T / Sarigiannis, D / Simeonidis, K

Environmental pollution. 2021 Feb. 15, v. 271

2021

Abstract	Due to their small dimensions, airborne particles are able to penetrate through inhalation into many human organs, from the lungs to the cardiovascular system and the brain, which can threaten our health. This work establishes a novel approach of collecting quantitative data regarding the fraction, the composition and the size distribution of combustion-emitted particulate matter through the magnetic characterization and analysis of samples received by common air pollution monitoring. To this end, SQUID magnetometry measurements were carried out for samples from urban and suburban areas in Thessaloniki, the second largest city of Greece, taking into consideration the seasonal and weekly variation of airborne particles levels as determined by occurring traffic and meteorological conditions. The level of estimated magnetically-responding atmospheric particulate matter was at least 0.5 % wt. of the collected samples, mostly being present in the form of ultrafine particles with nuclei sizes of approximately 14 nm and their aggregates. The estimated quantities of magnetic particulate matter show maximum values during autumn months (0.8 % wt.) when increased commuting takes place, appearing higher in the city center by up to 50% than those in suburban areas. In combination with high-resolution transmission electron imaging and elemental analysis, it was found that Fe₃O₄ and similar ferrites, some of them attached to heavy metals (Co, Cr), are the dominant magnetic contributors arising from anthropogenic high-temperature processes, e.g. due to traffic emissions. Importantly, nasal cytologic samples collected from residents of both central and suburban areas showed same pattern in what concerns magnetic behavior, thus verifying the critical role of nanosized magnetic particles in the assessment of air pollution threats. Despite the inherent statistical limitations of our study, such findings also indicate the potential transmission of infectious pathogens by means of pollution-derived nanoparticles into the respiratory system of the human body.
Keywords	air pollution ; autumn ; brain ; breathing ; cardiovascular system ; humans ; magnetism ; nose ; particulates ; traffic ; Greece
Language	English
Dates of publication	2021-0215
Publishing place	Elsevier Ltd
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	280652-6
ISSN	1873-6424 ; 0013-9327 ; 0269-7491
ISSN (online)	1873-6424
ISSN	0013-9327 ; 0269-7491
DOI	10.1016/j.envpol.2020.116309
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Controlling Magnetization Reversal and Hyperthermia Efficiency in Core-Shell Iron-Iron Oxide Magnetic Nanoparticles by Tuning the Interphase Coupling.

Simeonidis, K / Martinez-Boubeta, C / Serantes, D / Ruta, S / Chubykalo-Fesenko, O / Chantrell, R / Oró-Solé, J / Balcells, Ll / Kamzin, A S / Nazipov, R A / Makridis, A / Angelakeris, M

ACS applied nano materials

2020 Volume 3, Issue 5, Page(s) 4465–4476

Abstract: Magnetic particle hyperthermia, in which colloidal nanostructures are exposed to an alternating magnetic field, is a promising approach to cancer therapy. Unfortunately, the clinical efficacy of hyperthermia has not yet been optimized. Consequently, ... ...

Abstract	Magnetic particle hyperthermia, in which colloidal nanostructures are exposed to an alternating magnetic field, is a promising approach to cancer therapy. Unfortunately, the clinical efficacy of hyperthermia has not yet been optimized. Consequently, routes to improve magnetic particle hyperthermia, such as designing hybrid structures comprised of different phase materials, are actively pursued. Here, we demonstrate enhanced hyperthermia efficiency in relatively large spherical Fe/Fe-oxide core-shell nanoparticles through the manipulation of interactions between the core and shell phases. Experimental results on representative samples with diameters in the range 30-80 nm indicate a direct correlation of hysteresis losses to the observed heating with a maximum efficiency of around 0.9 kW/g. The absolute particle size, the core-shell ratio, and the interposition of a thin wüstite interlayer are shown to have powerful effects on the specific absorption rate. By comparing our measurements to micromagnetic calculations, we have unveiled the occurrence of topologically nontrivial magnetization reversal modes under which interparticle interactions become negligible, aggregates formation is minimized and the energy that is converted into heat is increased. This information has been overlooked until date and is in stark contrast to the existing knowledge on homogeneous particles.
Language	English
Publishing date	2020-04-13
Publishing country	United States
Document type	Journal Article
ISSN	2574-0970
ISSN (online)	2574-0970
DOI	10.1021/acsanm.0c00568
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: The effects of exchange bias on Fe-Co/MgO magnetic nanoparticles with core/shell morphology.

Martinez-Boubeta, C / Balcells, Ll / Monty, C / Martínez, B

Journal of physics. Condensed matter : an Institute of Physics journal

2010 Volume 22, Issue 2, Page(s) 26004

Abstract: ... that the coercive field H(C)(FeCo)>H(C)(Co)>H(C)(Fe); however, the exchange bias field H(E) of the Co sample is ...

Abstract	The effects of exchange bias on core/shell structured nanoparticles are analyzed. Nanoparticles are integrated with high moment Fe-Co crystallites covered epitaxially with MgO shells. It is observed that the coercive field H(C)(FeCo)>H(C)(Co)>H(C)(Fe); however, the exchange bias field H(E) of the Co sample is higher than that of the FeCo one, while H(E)=0 for the Fe sample. It is suggested that the exchange bias is induced by the formation of a (Co, Mg)O solid solution. In fact, we show that it is possible to modify the exchange bias properties by manipulating the level of Mg dusting at the interface, as recently reported for thin films.
Language	English
Publishing date	2010-01-20
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1472968-4
ISSN	1361-648X ; 0953-8984
ISSN (online)	1361-648X
ISSN	0953-8984
DOI	10.1088/0953-8984/22/2/026004
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: One-Step Route to Iron Oxide Hollow Nanocuboids by Cluster Condensation: Implementation in Water Remediation Technology.

Balcells, Lluís / Martínez-Boubeta, Carlos / Cisneros-Fernández, José / Simeonidis, Konstantinos / Bozzo, Bernat / Oró-Sole, Judith / Bagués, Núria / Arbiol, Jordi / Mestres, Narcís / Martínez, Benjamín

ACS applied materials & interfaces

2016 Volume 8, Issue 42, Page(s) 28599–28606

Abstract: The fabrication procedure of hollow iron oxide nanoparticles with a large surface to volume ratio by a single-step gas condensation process at ambient temperature is presented. Fe clusters formed during the sputtering process are progressively ... ...

Abstract	The fabrication procedure of hollow iron oxide nanoparticles with a large surface to volume ratio by a single-step gas condensation process at ambient temperature is presented. Fe clusters formed during the sputtering process are progressively transformed into hollow cuboids with oxide shells by the Kirkendall mechanism at the expense of oxygen captured inside the deposition chamber. TEM and Raman spectroscopy techniques point to magnetite as the main component of the nanocuboids; however, the magnetic behavior exhibited by the samples suggests the presence of FeO as well. In addition, these particles showed strong stability after several months of exposure to ambient conditions, making them of potential interest in diverse technological applications. In particular, these hierarchical hollow particles turned out to be very efficient for both As(III) and As(V) absorption (326 and 190 mg/g, respectively), thus making them of strong interest for drinking water remediation.
Language	English
Publishing date	2016-10-26
Publishing country	United States
Document type	Journal Article
ISSN	1944-8252
ISSN (online)	1944-8252
DOI	10.1021/acsami.6b08709
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