Analysis of Particle Size Distribution of Rod Shaped Gold Nanoparticle

Gold nanorods are rod-shaped gold nanoparticles. Fig. 1 shows that gold nanorods have two surface plasmon bands in the directions of the short and long axes derived from their anisotropic shapes. By changing the aspect ratio, the absorption wavelength is changed. They can be used in coloration materials, sensing materials, biomarkers, drug delivery system (DDS) research materials, photothermal conversion materials, photosensitizers, etc. For example, when a target material adsorbs onto a gold nanorod, the absorption wavelength of the gold particle will shift. Thus, it can be used as a sensing element using changes in spectroscopic characteristics. It can be applied to hyperthermia and ultrasonic echo diagnosis using photoacoustic effects by utilizing the property of heat generation when irradiated with light.