A lock-in-based method to examine the thermal signatures of magnetic nanoparticles in the liquid, solid and aggregated states

作者：Monnier C A; Lattuada M; Burnand D; Crippa F; Martinez Garcia J C; Hirt A M; Rothen Rutishauser B; Bonmarin M; Petri Fink A

来源：Nanoscale, 2016, 8(27): 13321-13332.

DOI：10.1039/c6nr02066f

We propose a new methodology based on lock-in thermography to study and quantify the heating power of magnetic nanoparticles. Superparamagnetic iron oxide nanoparticles exposed to a modulated alternating magnetic field were used as model materials to demonstrate the potency of the system. Both quantitative and qualitative information on their respective heating power was extracted at high thermal resolutions under increasingly complex conditions, including nanoparticles in the liquid, solid and aggregated states. Compared to conventional techniques, this approach offers a fast, sensitive and non-intrusive alternative to investigate multiple and dilute specimens simultaneously, which is essential for optimizing and accelerating screening procedures and comparative studies.

• 出版日期2016