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

作者：Fernandez Garcia M P^*; Teixeira J M; Machado P; Oliveira M R F F; Maia J M; Pereira C; Pereira A M; Freire C; Araujo J P

来源：Review of Scientific Instruments, 2015, 86(4): 043904.

DOI：10.1063/1.4918723

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 degrees-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.

• 出版日期2015-4