34 KB1343 KB29 KB200020242013Avgin, IbrahimKürçükdermenci, SerhatKutluay, Denizštevilka:1letnik:47str. 71-78ISSN:1580-2949COBISSID:960426URN:URN:NBN:SI:doc-0F7XXV1DenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijeFaradeyeva rotacijamagnetna tekočinananodelciželezov oksidSynthesis of a Fe3O4/PAA-based magnetic fluid for faraday-rotation measurements| Sinteza magnetne tekočine na osnovi Fe3O4/PAA za meritve Faradayeve rotacije|Highly water-soluble Fesub{3}Osub4/PAA (polyacrylic acid) nanoparticles (NPs) were synthesized with the high-temperature hydrolysis method. We report the first demonstration of Faraday rotation (FR) for a magnetic fluid (MF) synthesized with this novel method. The experiments were performed in the DC regime (0-6 . 10sup{-2} T) at room temperature for 14 concentrations from 1.8 mg/ml to 5 mg/ml. The maximum rotation was recorded as 0.96° cmsup-1 for 3.33 mg/ml and this is called the critical concentration (Csub{CRITICAL}). It was found that the rotation tends to decrease when the concentration is higher than Csub{CRITICAL}. The MF behavior for FR is discussed with respect to substructure interactions (particle-particle, chain-chain). This work provides a new insight for the FR investigations of MFs including highly water-soluble magnetic NPsV vodi dobro topni nanodelci Fespodaj{3}Ospodaj4/PAA (poly acrylic acid) so bili sintetizirani po metodi visokotemperaturne hidrolize. Poročamo o prvi demonstraciji Faradayeve rotacije (FR) za magnetno raztopino (MF), sintetizirano po tej novi metodi. Preizkusi so bili izvršeni v DC-režimu (0-6 . 10na{-2} T) pri sobni temperature za 14 različnih koncentracij od 1,8 mg/ml do 5 mg/ml. Največja rotacija je bila ugotovljena kot 0,96° cmna{-1} pri 3,33 mg/ml, kar smo imenovali kritična koncentracija (Cspodaj{CRITICAL}). Ugotovljeno je bilo, da se rotacija zmanjšuje, če je koncentracija višja od Cspodaj{CRITICAL}. Lastnost MF za FR je bila obravnavana z interakcijami podstrukture (delec-delec, veriga-veriga). To delo ponuja nov pogled v študij FR magnetnih raztopin (MFs), vključno z v vodi dobro topnimi nanodelci (NPs)TEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije