Effect of DNA Coating on Magnetic Relaxation in <formula formulatype="inline"><tex>$\gamma$</tex></formula>Fe<formula formulatype="inline"><tex>$_{2}$</tex></formula>O<formula formulatype="inline"> <tex>$_{3}$</tex></formula> Nanoparticles

In this paper, we compare the magnetic relaxation of DNA-coated gammaFe<sub>2</sub>O<sub>3</sub> with that of parent 7-nm gammaFe<sub>2</sub>O<sub>3</sub> particles by measuring the temperature dependence of AC susceptibilities (chi' and chi'') at frequency f = 0.1, 1, 10, 100, and 1000 Hz and electron magnetic resonance (EMR) at 9.28 GHz. Changes in the… (More)