Surface energy transfer (SET) is a dipole-surface energy transfer process involving a metallic surface and a molecular dipole.[1]
The SET rate follows the inverse of the fourth power of the distance[2]
where
The energy transfer efficiency also follows a similar form
Due to the fourth power dependence SET can cover a distance more than 15 nm, which is almost twice the efficiency of FRET.[3] Theoretically predicted in 1978 by Chance et al. it was proved experimentally in 2000s by different workers.[4]
The efficiency of SET as nanoruler has been used in live cells.[5]
Gold nano particles are frequently used in these studies as the nanoparticle surface.[citation needed]
Original source: https://en.wikipedia.org/wiki/Surface energy transfer.
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