Nanoparticles are microscopic with diameters ranging between 1-100 nm. Their small size allows them to have tunable properties with variation in size. CdSe quantum dots are made from semiconducting material and fluoresce when excited. Au metal nanoparticles exhibit localized surface plasmon resonance (LSPR) which allows them to absorb and transfer energy to nearby particles. The efficiency of this energy transfer is not well defined by traditional methods. sample-transmitted excitation photoluminescence (STEP) spectroscopy is a new method that measures the change in fluoresce of the acceptor molecule as the excitation of the donor molecule is blocked by a filter. Using STEP spectroscopy, we will quantify the percentage of energy transfer between Au and CdSe nanoparticles in thin films.

Measuring energy transfer efficiency between Au and CdSe nanoparticles

255th National Meeting (2018)

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