Pub Date : 2021-10-25DOI: 10.1515/9783110569636-004
N. Lucht, Stephan Hinrichs, Larissa Grossmann, Catharina Pelz, Elena Felgenhauer, Eike Clasen, Maximilian Schwenk, Birgit Hankiewicz
{"title":"4 Synthesis of magnetic ferrogels: a tool-box approach for finely tuned magnetic- and temperature-dependent properties","authors":"N. Lucht, Stephan Hinrichs, Larissa Grossmann, Catharina Pelz, Elena Felgenhauer, Eike Clasen, Maximilian Schwenk, Birgit Hankiewicz","doi":"10.1515/9783110569636-004","DOIUrl":"https://doi.org/10.1515/9783110569636-004","url":null,"abstract":"","PeriodicalId":176189,"journal":{"name":"Magnetic Hybrid-Materials","volume":"455 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132517210","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}
Pub Date : 2021-10-25DOI: 10.1515/9783110569636-029
R. Friedrich, C. Janko, H. Unterweger, S. Lyer, C. Alexiou
{"title":"29 SPIONs and magnetic hybrid materials: Synthesis, toxicology and biomedical applications","authors":"R. Friedrich, C. Janko, H. Unterweger, S. Lyer, C. Alexiou","doi":"10.1515/9783110569636-029","DOIUrl":"https://doi.org/10.1515/9783110569636-029","url":null,"abstract":"","PeriodicalId":176189,"journal":{"name":"Magnetic Hybrid-Materials","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122126766","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}
Pub Date : 2021-10-25DOI: 10.1515/9783110569636-002
G. Stepanov, D. Borin, A. Bakhtiiarov, P. Storozhenko
: Hybrid magnetic elastomers (HMEs) belong to a novel type of magneto-controllable elastic materials capable of demonstrating extensive variations of their parameters under the influence of magnetic fields. Like all cognate materials, HMEs are based on deformable polymer filled with a mixed or modified powder. The complex of properties possessed by the composite is a reflection of interactions occurring between the polymer matrix and the particles also participating in interactions among themselves. For example, introduction of magnetically hard components into the formula results in the origination of a number of significantly different behavioral features entirely unknown to magnetorheological composites of the classic type. Optical observation of samples based on magnetically hard filler gave the opportunity to establish that initial magnetization imparts magnetic moments to initially unmagnetized grains, as a result of which chain-like structures continue to be a feature of the material even after external field removal. In addition, applying a reverse field causes them to turn into the polymer as they rearrange into new ring-like structures. Exploration of the relationship between the rheological properties and magnetic field conducted on a rheometer using vibrational mechanical analysis showed an increase of the relative elastic modulus by more than two orders of magnitude or by 3.8 MPa, whereas the loss factor exhibited steady growth with the fi eld up to a value of 0.7 being signi fi cantly higher than that demonstrated by elastomers with no magnetically hard particles. At the same time, measuring the electroconductivity of elastomers fi lled with a nickel-electroplated carbonyl iron powder made it possible to observe that such composites demonstrated an increase of variation of the resistivity of the composite in fl uenced by magnetic fi eld in comparison to elastomers containing untreated iron particles. The studies conducted indicate that this material exhibits both magnetorheological and magnetoresistive effect and does indeed have the potential for use in various types of devices.
{"title":"2 Hybrid magnetic elastomers prepared on the basis of a SIEL-grade resin and their magnetic and rheological properties","authors":"G. Stepanov, D. Borin, A. Bakhtiiarov, P. Storozhenko","doi":"10.1515/9783110569636-002","DOIUrl":"https://doi.org/10.1515/9783110569636-002","url":null,"abstract":": Hybrid magnetic elastomers (HMEs) belong to a novel type of magneto-controllable elastic materials capable of demonstrating extensive variations of their parameters under the influence of magnetic fields. Like all cognate materials, HMEs are based on deformable polymer filled with a mixed or modified powder. The complex of properties possessed by the composite is a reflection of interactions occurring between the polymer matrix and the particles also participating in interactions among themselves. For example, introduction of magnetically hard components into the formula results in the origination of a number of significantly different behavioral features entirely unknown to magnetorheological composites of the classic type. Optical observation of samples based on magnetically hard filler gave the opportunity to establish that initial magnetization imparts magnetic moments to initially unmagnetized grains, as a result of which chain-like structures continue to be a feature of the material even after external field removal. In addition, applying a reverse field causes them to turn into the polymer as they rearrange into new ring-like structures. Exploration of the relationship between the rheological properties and magnetic field conducted on a rheometer using vibrational mechanical analysis showed an increase of the relative elastic modulus by more than two orders of magnitude or by 3.8 MPa, whereas the loss factor exhibited steady growth with the fi eld up to a value of 0.7 being signi fi cantly higher than that demonstrated by elastomers with no magnetically hard particles. At the same time, measuring the electroconductivity of elastomers fi lled with a nickel-electroplated carbonyl iron powder made it possible to observe that such composites demonstrated an increase of variation of the resistivity of the composite in fl uenced by magnetic fi eld in comparison to elastomers containing untreated iron particles. The studies conducted indicate that this material exhibits both magnetorheological and magnetoresistive effect and does indeed have the potential for use in various types of devices.","PeriodicalId":176189,"journal":{"name":"Magnetic Hybrid-Materials","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115671004","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}
Pub Date : 2021-10-25DOI: 10.1515/9783110569636-009
M. Liebl, D. Eberbeck, A. Coene, J. Leliaert, P. Jauch, M. Kruteva, L. Fruhner, L. Barnsley, S. G. Mayr, F. Wiekhorst
Magnetic nanoparticles (MNPs) are key elements in several biomedical applications, e.g., in cancer therapy. Here, the MNPs are remotely manipulated by magnetic fields from outside the body to deliver drugs or generate heat in tumor tissue. The efficiency and success of these approaches strongly depend on the spatial distribution and quantity of MNPs inside a body and interactions of the particles with the biological matrix. These include dynamic processes of the MNPs in the organism such as binding kinetics, cellular uptake, passage through cell barriers, heat induction and flow. While magnetic measurement methods have been applied so far to resolve the location and quantity of MNPs for therapymonitoring, thesemethods can be advanced to additionally access these particle–matrix interactions. By this, the MNPs can further be utilized as probes for the physical properties of their molecular environment. In this review,we first investigate the impact of nanoparticle–matrix interactions onmagnetic measurements in selected experiments. With these results, we then advanced the imaging modalities magnetorelaxometry imaging and magnetic microsphere tracking to spatially resolve particle–matrix interactions.
{"title":"9 Magnetic measurement methods to probe nanoparticle–matrix interactions","authors":"M. Liebl, D. Eberbeck, A. Coene, J. Leliaert, P. Jauch, M. Kruteva, L. Fruhner, L. Barnsley, S. G. Mayr, F. Wiekhorst","doi":"10.1515/9783110569636-009","DOIUrl":"https://doi.org/10.1515/9783110569636-009","url":null,"abstract":"Magnetic nanoparticles (MNPs) are key elements in several biomedical applications, e.g., in cancer therapy. Here, the MNPs are remotely manipulated by magnetic fields from outside the body to deliver drugs or generate heat in tumor tissue. The efficiency and success of these approaches strongly depend on the spatial distribution and quantity of MNPs inside a body and interactions of the particles with the biological matrix. These include dynamic processes of the MNPs in the organism such as binding kinetics, cellular uptake, passage through cell barriers, heat induction and flow. While magnetic measurement methods have been applied so far to resolve the location and quantity of MNPs for therapymonitoring, thesemethods can be advanced to additionally access these particle–matrix interactions. By this, the MNPs can further be utilized as probes for the physical properties of their molecular environment. In this review,we first investigate the impact of nanoparticle–matrix interactions onmagnetic measurements in selected experiments. With these results, we then advanced the imaging modalities magnetorelaxometry imaging and magnetic microsphere tracking to spatially resolve particle–matrix interactions.","PeriodicalId":176189,"journal":{"name":"Magnetic Hybrid-Materials","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124078586","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}
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