Samantha E Smith, Santiago Bermudez, Pavan Chaitanya, Zoe Boekelheide, Jessika Rojas Marin, Ravi L Hadimani
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Influence of x-ray irradiation on the magnetic and structural properties of gadolinium silicide nanoparticles.
Magnetic hyperthermia treatment (MHT) utilizes heat generated from magnetic nanoparticles under an alternating magnetic field for therapeutic applications. Gadolinium silicide (Gd5Si4) has emerged as a promising MHT candidate. However, the impact of high-dose x-ray irradiation on its magnetic behavior remains uncertain. This study examines Gd5Si4nanoparticles exposed to 36 and 72 kGy x-ray irradiation at a high-dose rate (120 Gy min-1). While x-ray diffraction, scanning electron microscopy, and energy dispersive spectroscopy confirm no structural or compositional changes, transmission electron microscopy reveals localized lattice distortions, along with observable changes in magnetic properties, as evidenced in magnetization vs. temperature and hysteresis measurements. Despite this, magnetocaloric properties and specific loss power remain unaffected. Our findings confirm the stability of Gd5Si4under high-dose x-ray irradiation, supporting its potential for radiotherapy and magnetocaloric cooling in deep-space applications.
期刊介绍：
The journal aims to publish papers at the forefront of nanoscale science and technology and especially those of an interdisciplinary nature. Here, nanotechnology is taken to include the ability to individually address, control, and modify structures, materials and devices with nanometre precision, and the synthesis of such structures into systems of micro- and macroscopic dimensions such as MEMS based devices. It encompasses the understanding of the fundamental physics, chemistry, biology and technology of nanometre-scale objects and how such objects can be used in the areas of computation, sensors, nanostructured materials and nano-biotechnology.
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