24 KB430 KB20 KB200020242013Avgin, IbrahimÇelik, ErdalKüçükdermenci, SerhatKutluay, DenizMermer, Ömerštevilka:3letnik:47str. 323-327ISSN:1580-2949COBISSID:998826URN:URN:NBN:SI:doc-SHAT7ZMDenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijeFaradayevo vrtenjemagnetne tekočinenanotehnologijaželezov oksidConcentration and path-length dependence on the Faraday rotation of magnetic fluids based on highly water-soluble Fe3O4/PAA nanoparticles synthesized by a high-temperature hydrolysis method| Odvisnost koncentracije in dolžine poti od Faradayevega vrtenja magnetnih tekočin na osnovi visokovodotopnih nanodelcev Fe3O4/PAA, sinteziranih z metodo visokotmeperaturne hidtrolize|In this study, highly water-soluble Fe3O4/PAA (polyacrylic acid) nanoparticles (NPs) were synthesized by a high-temperature hydrolysis method. We report the first demonstration of the concentration and path-length dependence on the Faraday rotation (FR) for a magnetic fluid (MF) synthesized by this novel method. Experiments were performed in the DC regime (0-6 x 10sup{-2} T) at room temperature. Measurements were carried out with 5-3.33 mg/ml and 1.18 mg/ml samples in cells (2, 5, 7 and 10) mm. The maximum rotation was recorded as 0.96° cmsup{-1} for the 3.33 mg/ml concentration in the cell 10 mm. It was found that the magnetic fluid behaves with a distinctive phenomenon in different sized cells although its concentration was the same. The role of the different parameters on the FR was discussed via spatial limitations imposed by the cells and a premature saturation term. This work provides a new insight for FR investigations of MFs including highly water-soluble magnetic NPsV tej študiji so bili sintetizirani visokovodotopni Fe3O4/PAA (poliakrilna kislina)-nanodelci (NPs) z metodo visokotemperaturne hidrolize. Poročamo o prvih predstavitvah odvisnosti koncentracije in dolžine poti od Faradayevega vrtenja (FR) za magnetno tekočino (MF), sintetizirano po tej novi metodi. Preizkusi so bili izvedeni v DC-režimu (0-6 x 10sup{-2} T) pri sobni temperaturi. Meritve so bile izvršene z vzorci 5-3,33 mg/ml in 1,18 mg/ml v celicah (2, 5, 7 in 10) mm. Maksimum vrtenja je bil ugotovljen kot 0,96° cmsup{-1} pri koncentraciji 3,33 mg/ml v celici 10 mm. Ugotovljeno je bilo, da magnetna tekočina izkazuje značilne pojave v celicah različne velikosti, čeprav je bila njena koncentracija enaka. Vloga različnih parametrov na FR je bila razložena s prostorskimi omejitvami, ki jo povzročijo celice in z uvajanjem izraza za prezgodnjo prenasičenost. To delo zagotavlja nov vpogled v preiskave Faradayevega vrtenja (FR) magnetnih tekočin (MFs), vključno z visokovodotopnimi magnetnimi nanodelci (NPs)TEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije