Herein, we report the simple preparation of water dispersible angular-shaped amine-functionalized super-paramagnetic iron oxide nanoparticles (A-SPIONs).

The purpose of this research is to develop a diagnostic reference level for computed tomography (CT) suitable for Korean medical purposes. The direction of CT application and details on patient dose were investigated by survey, and the dose measurement is targeted in general hospitals registered with the Korean Hospital Association. The dose measurement was done with head and body phantom, and an accurate dosimeter was utilised in medical institutions that participated in the survey. The survey and dose measurements on the patient dose showed that the 75th percentiles in the distribution of weighted CT dose index (CTDIw) were 50.5 and 45.4 mGy for the head and 14.4 and 25.30 mGy for the body portions, respectively. Based on these research data, the target patient doses that are believed to be achievable for CT examination in Korean circumstances are about 48 +/- 4 mGy in the head and 20 +/- 8 mGy in the body.

No abstract

A magnetically recoverable photocatalyst was prepared by supporting TiO 2 nanoparticles on a superparamagnetic iron oxide nanocluster (SION) core@fibrous silica shell (FSS) nanocomposite. Using the raspberry-shaped magnetic iron oxide nanocluster core as a seed, FSS with uniform thickness was grown directly on the core surface by a sol-gel process. The preparation method was optimized to have a single core for each nanoparticle by adjusting the amount of the silica source. The FSS has a fanning structure of radial pores, which enable large amounts of TiO 2 nanoparticles to be supported easily on the pore surface. SION@FSS with amorphous TiO 2 loaded on the pores (SION@FSS@Am-TiO 2 ) was crystallized to the anatase phase (SION@FSS@A-TiO 2 ), which shows good photocatalytic effect. When used for water purification, SION@FSS@A-TiO 2 shows faster dye degradation kinetics than that of commercial P25 nanoparticles. The as-prepared SION@FSS@A-TiO 2 photocatalyst could be magnetically recovered easily from water after decolorization of the dye. † Electronic supplementary information (ESI) available: TEM images of the as-prepared SION and SION@FSS; nitrogen adsorption desorption isotherms of SION@FSS, SION@FSS@Am-TiO 2 and SION@FSS@A-TiO 2 ; EDS of SION@FSS, SION@FSS@Am-TiO 2 and SION@FSS@A-TiO 2 ; TEM image of the SION@FSS@ A-TiO 2 aer the detoxication of water; and calibration curve of methylene blue. See