Dissipation of absorbed EM radiation as heat by plasmonic Au nanoparticles and nanostructures has potential application in many areas such as photothermal therapy, targeted drug delivery, plasmofluidics, nanochemistry, etc., . The enhancement in the absorption of light and consequently in the heat dissipation is due to the localized surface plasmon resonance (LSPR) of the nanoparticles at certain wavelengths that results from collective and coherent oscillation of the free electrons on the surface . Illumination of Au nanoparticles with coherent laser of a wavelength close to the LSPR wavelength results in strong nearfield enhancement, scattering and absorption . So far, considerable efforts have been devoted towards both application and understanding of the photothermal effect of nanoparticles and nanostructures . For instance, Hirsch et al. demonstrated photothermally induced morbidity of carcinoma cells by Au-silica nanoshells using an 820 nm NIR illumination . Similarly, heating of nano-fluids of Au and silver nanoparticles by light has been investigated for applications such as steam generation, desalination, solar energy harvesting, etc., . Photoporation of cell wall for targeted drug delivery is another application where isolated nanoparticles work as localized heat sources .