Precipitation of Iron Oxide in Hydrogel with Superparamagnetic and Stimuli-Responsive Properties

In this work, we present a template-based preparation of iron oxide-containing hydrogels (ferrogels) with ionic sensitive and superparamagnetic properties. The influence the cross-linked template polyacrylamide concentration salts sodium hydroxide on precipitation oxide particles is investigated respect to stability ferrogels. Scanning electron microscope images show cubic particles, which can be semiquantitatively classified in three groups particle size dilution level. Magnetic hysteresis curves reveal sigmoidal shape without remanence coercivity for all samples. higher ferrogels, comparison lower possess steady-state degree swelling ultrapure water stimuli-sensitive deswelling over wide range varying strengths. Thus, they are suitable candidates applications sensing microfluidics.