Abstract
In this study, dose sensitivity enhancing effect of silver (Ag) nanoparticles on dosimetric gels has been investigated. Nanoparticles were added to nMAG and NIPAM dose gel formulations. Ag nanoparticles were obtained via a simple wet chemical synthesis method from AgNO3. Synthesized nanoparticles were characterized using dynamic light scattering (DLS) and scanning electron microscopy (SEM) techniques. Nanoparticle-enriched dose gels were irradiated with 120 keV photons and investigated using Ultraviolet–visible (UV–Vis) and Fourier transform infrared (FTIR) spectroscopy techniques. Addition of Ag nanoparticles allowed to achieve higher sensitivity for both NIPAM and nMAG dose gels. Dose enhancement factor of 1.43 was achieved for nMAG dose gel, and 2.4 for NIPAM dose gel. FTIR spectroscopy also showed signs of radiation-enhancing effect of Ag nanoparticles. Improved gel dosimeters could be used as a valuable tool for dose verification procedures. However, due to variation of dose enhancement effect in different gel dosimeters, application of nano particle enriched dose gels for simulation of dose enhancement effect in the human tissue is not straightforward.
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