Insight into the nanodielectric properties of gold nanoparticles synthesized from maple leaf and pine needle extracts

• First report on nanodielectric properties of green synthesised gold nanoparticles.
• Single step green synthesis of gold nanoparticles using maple leaf and pine needle extract.
• Synthesis of gold nanoparticles within 10 min using water as solvent at room temperature.

This study reports on the use of maple leaf (Acer saccharum) and pine needle extracts for the green synthesis of gold nanoparticles (AuNP). The gold nanoparticles were formed within 10 min using distilled water as the solvent following green nanotechnology approach. This is the first study reporting the use of maple leaves and pine needles for synthesizing gold nanoparticles. Characterization using transmission electron microscope (TEM) indicated the presence of quasi-spherical to triangular prisms of AuNP; nanodielectric properties were studied using dielectric spectroscopy which provides information about dielectric constant (ϵ') and dielectric loss factor (ϵ′′); thermal properties of the nanoparticle solution where studied using differential scanning colorimeter (DSC). This information on the physical characterization of green synthesized AuNP will be useful in designing applications for hyperthermal treatments using radiofrequency waves and for microwave based tumor therapy.