Plasmon absorption of colloidal gold particles

The thesis summarizes basic information about palsmon resonance conditions and goes into detail for spehrical gold nanoparticles. It could be shown, that the resoncance position is influenced by the particle size and shape as well as the surrounding material. A temperature gradient affects especially on the longitudinal surface plasmon nanorod peak.

The wavelength dependencie could be immediatly acquired from the spectroscopic measurements. In addition, at the example of liquid tissue phantoms could be approved that the absorption with organic material can be enhanced by gold nanosphere. Magnifications up to 78% were registered. Hence, an absorpiton amplification effect could be approved.

However, the nanosphere are not the bet choice to work as absrobing material. Nanorods show even higher absorption effects. Thus, it would be interesting to repeat the measurement with nanorods and maybe also other material.

Further effort should be spent to investigate the nanoparticle behaviour in case of high irradiances, like femto-second lasers. Also experiments with tissue should be taken into account to investigate for the given nanoparticles in a better way.