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Projects / Programmes source: ARIS

Advanced inorganic magnetic and semiconducting materials )

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Periods
January 1, 2009 - December 31, 2014
Research activity

Code Science Field Subfield
2.04.00  Engineering sciences and technologies  Materials science and technology   
1.04.00  Natural sciences and mathematics  Chemistry   
2.09.00  Engineering sciences and technologies  Electronic components and technologies   

Code Science Field
T150  Technological sciences  Material technology 

Code Science Field
2.05  Engineering and Technology  Materials engineering 
Keywords
ceramics, syntheses of materials, magnetic materials, microwave ferrites, magnetic nanoparticles, semiconducting ceramic, PTCR thermistors
Evaluation (rules)
source: COBISS
Evaluation of bibliographic research performance indicators according to ARIS methodology
Citations Citations for bibliographic records in COBIB.SI that are linked to records in citation databases
source: WoS source: Scopus source: COBISS
Researchers (18)
no. Code Name and surname Research area Role Period No. of publications
1.  32402  Bernarda Anželak    Technical associate  2009 - 2014  46 
2.  08761  PhD Irena Ban  Chemistry  Researcher  2009  298 
3.  36327  PhD Blaž Belec  Materials science and technology  Junior researcher  2013 - 2014  83 
4.  26338  PhD Stanislav Čampelj  Materials science and technology  Junior researcher  2009 - 2010  63 
5.  01360  PhD Mihael Drofenik  Chemistry  Researcher  2009 - 2012  770 
6.  34434  PhD Peter Dušak  Materials science and technology  Junior researcher  2011 - 2014  25 
7.  26478  PhD Sašo Gyergyek  Materials science and technology  Researcher  2009 - 2014  291 
8.  33403  PhD Petra Jenuš  Materials science and technology  Junior researcher  2010 - 2014  156 
9.  29529  PhD Slavko Kralj  Materials science and technology  Researcher  2009 - 2014  250 
10.  14755  PhD Matjaž Kristl  Chemistry  Researcher  2009 - 2012  316 
11.  15148  PhD Darja Lisjak  Materials science and technology  Researcher  2009 - 2014  413 
12.  37477  Helena Macut  Materials science and technology  Junior researcher  2014  7 
13.  10372  PhD Darko Makovec  Materials science and technology  Head  2009 - 2014  667 
14.  29535  PhD Simona Ovtar  Materials science and technology  Junior researcher  2009 - 2012  41 
15.  35476  PhD Olivija Plohl  Textile and leather  Junior researcher  2012 - 2014  103 
16.  29744  PhD Darinka Primc  Materials science and technology  Junior researcher  2009 - 2013  44 
17.  34450  PhD Klementina Pušnik Črešnar  Chemistry  Junior researcher  2011 - 2014  55 
18.  07992  PhD Igor Zajc  Materials science and technology  Researcher  2009 - 2014  71 
Organisations (1)
no. Code Research organisation City Registration number No. of publications
1.  0106  Jožef Stefan Institute  Ljubljana  5051606000  90,753 
Abstract
The porogram proposes the investigation of new microwave magnetic materials and will be focused on the syntheses, control of the composition and the structure of these materials. The increase of the operating frequency of the electromagnetic devices to the 30-300 GHz demands the application of new magnetic materials particular these based on hexagonal ferrites. These materials can be applied in the elctromagnetic devices or can be used as absorbers of electromagnetic radiation. Among them are spinels, garnets and hexagonal ferrites most valuable. For the application as absorbers are hexagonal ferrites most appropriate, particularly compounds related to the family of complex hexagonal ferrites. As absorbers can be applied also composite materials particular due to their easier designing. In these materials is the ferrite phase dispersed in a polymer. For a successful use of ferrites in the millimetre frequency range, which was not enough investigated, it will be necessary to develop appropriate materials and the adequate processing methods. One of the basic task of the program is to investigate and develop the ferrites which can be used in electronic devices operating at GHz range. The second strategic material is based on magnetis nanoparticles which can be used in technique and medicine. The magnetic nanoparticles using as a technological material in magnetic nanocomposites, for magnetic recording, in magnetic liquids for toners and others are now well established. Among them is the application of magnetic nanoparticles in the magnetic liquids steadily increasing. Magnetic liquid forms when the superparramagnetic particles are dispersed in a compatible liquid. The number of technical and medical application of magnetic liquids for scaling, damping, heat transfer, loudspeakers, measuring devices etc is getting important. Particularly the application of magnetic liquid in medicine is standing increasing; immobilization and isolation of biologically active components, determination and detection of active components, isolation and study of cells, drug and radionuclide targeting and contrast-increasing materials during NMR imaging.
Significance for science
The program P2-0089 was devoted mainly to the syntheses of new materials. Accessibility to the appropriate material is frequently the main obstacle in the development of a new area of science and technology. The scientific principles governing the development in a certain area of science might frequently be well known; however, the development is limited by a lack of the appropriate technology needed to prepare the material required. In such a situation, knowledge enabling the synthesis of the required material can facilitate a sudden burst of research and new products. A good example is ferromagnetic liquid crystals, the existence of which were predicted by Brochard and de Gennes more than 40 years ago; however, only our development of magnetic BaFe12O19 nanoplatelet synthesis enabled the first experimental evidence, and, even more importantly, enabled the subsequent research and development of entirely new technologies. The main research has been focused on the controlled synthesis of nanoparticles (NPs), the engineering of their surface properties and their assembly into nanocomposites (NCs). New materials based on magnetic NPs for biomedical applications, magnetic ferrites for high-frequency applications and semiconducting ceramics were developed. We managed to be the first group in the world to synthesise ultrafine hexaferrite NPs. This then enabled the further development of NCs, such us the above-mentioned ferromagnetic liquids. However, developments based on the NPs synthesized according to our procedures are taking place worldwide. We developed new methods required for the control of NPs’ surface properties. The acquired knowledge is needed for the preparation of suspensions of NPs, for their medical applications, and also for the assembly of NPs into nanoclusters and NCs. The synthesis of stable suspensions of superparamagnetic nanoclusters with a narrow size distribution will enable a new approach to the control of optical properties (magneto-optics) and will enable new directions in photonics research. We have managed to synthesize such magneto-optical suspensions using an original synthesis procedure, second only to a group from the University of California. Our synthesis method enables the even easier production of larger amounts of the suspension. The research based on the application of our materials can thus have an especially large impact in the various fields of photonics. The suspensions are also very interesting in applications based on their large magneto-rheological effect. Our research of the synthesis, functionalization, and properties of NPs are of special importance for understanding the influence of NPs on living systems and therefore important for the development of nano-biomedicine and nano-toxicology. Basic research gained through our work in the field of microwave magnetic materials will be increasingly important in the near future, when the operating frequencies of electronic devices will increase to the area of mm-waves (30–300 GHz). At these high frequencies the intrinsic properties of conventional materials generally fail. There is a need for the development of new procedures enabling the synthesis of entirely new materials. Our significant contribution to this field of research is in the preparation of magnetically oriented films of Ba hexaferrite. To be able to control their deposition from the suspensions we had to study the forces acting between the magnetic nanoparticles in the suspension. Their magnetic agglomeration has to be avoided with an appropriate surface treatment. This gained knowledge is also the basis for the development of new materials combining magnetic materials with other functional materials. The composites enabling the coupling of different functional properties are of special interest, for example, coupled ferromagnetic and ferroelectric properties in magneto-electric composites.
Significance for the country
The majority of the research in the program has been devoted to the synthesis of complex nanomaterials and their use in medicine and technology. The methods that we use for the synthesis of new nanomaterials do not require expensive equipment, as they are based on original scientific approaches and a profound knowledge of basic chemical processes. Special care is given to new synthesis methods that enable a relatively easy transfer to industrial production. Our research is thus important for Slovenian industry. Although the research related to medicine is mainly basic and its applications seem quite distant, the acquired practical knowledge is important in cooperation with Slovenian pharmaceutical companies and SMEs providing specialized services to biomedical research. Our cooperation with the Lek Pharmaceuticals company is already well established on the research related to the development of new nanoparticles-based drugs. The knowledge developed in the research of materials applications in medicine is also practically applicable for the development of new technologies, products and services, especially related to magnetic separation. We already cooperate with the Cinkarna Celje company on the use of the magnetic separation in water purification. Thus, we participated in solving the ecological problems of water remediation, which is increasingly problematic in Slovenia. Magnetic separation is also important in biotechnology and in chemical technology, for example, in new, magnetically retractable (bio)catalysts that can be used by Slovenian industry, ranging from process industries, such as the producers of basic chemicals, over biotechnology and pharmacy, to the food industry. We already synthesized magnetic catalysts and tested them in relevant chemical processes. We are also involved in the development of new processes in the wine and beer industry based on the magnetic separation of microorganisms. A part of our research remains devoted to ceramics displaying a positive temperature coefficient of resistivity (PTCR), where we traditionally cooperate with the Stelem company. We also cooperate with the Optacore company in the R&D of magnetic and optical materials for optical fibres. To even further strengthen the transfer of our research results into practical use we recently established a spin-out company Nanos Scientificae d.o.o. and settled its legal relation with Jožef Stefan Institute. In the initial phase the company will market some of our knowledge related to the functionalization of magnetic nanoparticles to international customers working in biomedical research and photonics. The spin-out company gives many new opportunities for the marketing of our developed new technologies. Last but not the least, the program pioneers many areas of nanomaterials in Slovenia. Acquired knowledge is disseminated over research, industry, and to society, and is thus important for the technological development of Slovenia. The program contributes to an increase in the level of higher education with three habilitated professors. The members of the program are involved in the pedagogical processes at the Faculty for Chemistry and Chemical Technology, University of Maribor, the Faculty of Medicine, University of Maribor and at the International Postgraduate School of Jožef Stefan. Nanomaterials synthesized in our research group are used in the research of many other Slovenian research groups, from biology, nano-toxicology, physics, electrotechnics, and biotechnology. We even cooperate with the Art Academy, University of Ljubljana in the development of new artistic techniques based on manipulation with a suspension of magnetic nanoparticles in a monomer, which is polymerized to retain its form.
Most important scientific results Annual report 2009, 2010, 2011, 2012, 2013, final report, complete report on dLib.si
Most important socioeconomically and culturally relevant results Annual report 2009, 2010, 2011, 2012, 2013, final report, complete report on dLib.si
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