TY - JOUR AB - Gadolinium silicide (Gd5Si4) nanoparticles are an interesting class of materials due to their high magnetization, low Curie temperature, low toxicity in biological environments and their multifunctional properties. We report the magnetic and magnetothermal properties of gadolinium silicide (Gd5Si4) nanoparticles prepared by surfactant-assisted ball milling of arc melted bulk ingots of the compound. Using different milling times and speeds, a wide range of crystallite sizes (13–43 nm) could be produced and a reduction in Curie temperature (TC) from 340 K to 317 K was achieved, making these nanoparticles suitable for self-controlled magnetic hyperthermia applications. The magnetothermal effect was measured in applied AC magnetic fields of amplitude 164–239 Oe and frequencies 163–519 kHz. All particles showed magnetic heating with a strong dependence of the specific absorption rate (SAR) on the average crystallite size. The highest SAR of 3.7 W g−1 was measured for 43 nm sized nanoparticles of Gd5Si4. The high SAR and low TC, (within the therapeutic range for magnetothermal therapy) makes the Gd5Si4 behave like self-regulating heat switches that would be suitable for self-controlled magnetic hyperthermia applications after biocompatibility and cytotoxicity tests. AU - Nauman, Muhammad AU - Alnasir, Muhammad Hisham AU - Hamayun, Muhammad Asif AU - Wang, YiXu AU - Shatruk, Michael AU - Manzoor, Sadia ID - 9067 IS - 47 JF - RSC Advances KW - General Chemistry KW - General Chemical Engineering SN - 2046-2069 TI - Size-dependent magnetic and magnetothermal properties of gadolinium silicide nanoparticles VL - 10 ER - TY - JOUR AB - A new organic–inorganic ferroelectric hybrid capacitor designed by uniformly incorporating surface modified monodisperse 15 nm ferroelectric BaTiO3 nanocubes into non-polar polymer blends of poly(methyl methacrylate) (PMMA) polymer and acrylonitrile-butadiene-styrene (ABS) terpolymer is described. The investigation of spatial distribution of nanofillers via a non-distractive thermal pulse method illustrates that the surface functionalization of nanocubes plays a key role in the uniform distribution of charge polarization within the polymer matrix. The discharged energy density of the nanocomposite with 30 vol% BaTiO3 nanocubes is ∼44 × 10−3 J cm−3, which is almost six times higher than that of the neat polymer. The facile processing, along with the superior mechanical and electrical properties of the BaTiO3/PMMA–ABS nanocomposites make them suitable for implementation into capacitive electrical energy storage devices. AU - Parizi, Saman Salemizadeh AU - Conley, Gavin AU - Costanzo, Tommaso AU - Howell, Bob AU - Mellinger, Axel AU - Caruntu, Gabriel ID - 7457 IS - 93 JF - RSC Advances SN - 2046-2069 TI - Fabrication of barium titanate/acrylonitrile-butadiene styrene/poly(methyl methacrylate) nanocomposite films for hybrid ferroelectric capacitors VL - 5 ER -