Photothermal Characteristics Study of PEGylated Gold Nanorods

The present paper shows that gold nanorods were first synthesized and modified within different molecular weight of polyethyleneglycol ranging from 10,00 similar to 5000. PEGylated nanorods were irritated and evaluated their photothermal effects. In order to achieve temperature optimization, we have also employed multi-wavelength laser diode system at various wavelengths (785 nm, 808 nm, and 852 nm) and power (100 mW similar to 500 mW) to the target nanorods separately or combined for maximum hyperthermal effect. It is found that the highest temperature increase may be achieved by at certain wavelength combination near maximum absorption peak of nanorods than by single wavelength. This study will provide moderated rise of local temperature, and benefit further design of effective heating for hyperthermal therapy.