Automatized and desktop AC-susceptometer for the in situ and real time monitoring of magnetic nanoparticles' synthesis by coprecipitation

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Abstract

The main purpose of this work was to design, develop, and construct a simple desktop AC susceptometer to monitor in situ and in real time the coprecipitation synthesis of magnetic nanoparticles. The design incorporates one pair of identical pick-up sensing coils and one pair of Helmholtz coils. The picked up signal is detected by a lock-in SR850 amplifier that measures the in- and out-of-phase signals. The apparatus also includes a stirrer with 45°-angle blades to promote the fast homogenization of the reaction mixture. Our susceptometer has been successfully used to monitor the coprecipitation reaction for the synthesis of iron oxide nanoparticles.

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Fernández-García, M. P., Teixeira, J. M., Machado, P., Oliveira, M. R. F. F., Maia, J. M., Pereira, C., … Araujo, J. P. (2015). Automatized and desktop AC-susceptometer for the in situ and real time monitoring of magnetic nanoparticles’ synthesis by coprecipitation. Review of Scientific Instruments, 86(4). https://doi.org/10.1063/1.4918723

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