Surface energy transfer

Comparison of energy transfer efficiency between SET and FRET

Surface energy transfer (SET) is a dipole-surface energy transfer process involving metallic surface and molecular dipole.[1] SET rate follows an inverse of fourth power of distance.[2]

k_{SET}=({{1}/{\tau _{D}})({d}/{d_{0}})^{4}}

where \tau _{D} is the donor emission lifetime, d is the distance between donor-acceptor and d_{0} is the distance at which SET efficiency decreases to 50% (i.e., equal probability of energy transfer and spontaneous emission).

The energy transfer efficiency also follows a similar form

\phi _{SET}=\frac{1}{1+({d}/{d_{0}})^{4}}

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] Efficiency of SET as nanoruler is also found to be successful in live cell.[5] Gold nano particle is frequently used in these studies as nanoparticle surface.

See also

References

  1. ↑ Christopher J. Breshike; Ryan A. Riskowski & Geoffrey F. Strouse (2013). "Leaving Förster Resonance Energy Transfer Behind: Nanometal Surface Energy Transfer Predicts the Size-Enhanced Energy Coupling between a Metal Nanoparticle and an Emitting Dipole". J. Phys. Chem. C 117 (45): 23942–23949. doi:10.1021/jp407259r.
  2. ↑ C. S. Yun et al. (2005). "Nanometal Surface Energy Transfer in Optical Rulers, Breaking the FRET Barrier". J. Am. Chem. Soc. 127 (9): 3115–3119. doi:10.1021/ja043940i.
  3. ↑ T. L. Jennings; M. P. Singh & G. F. Strouse (2006). "Fluorescent Lifetime Quenching near d = 1.5 nm Gold Nanoparticles:  Probing NSET Validity". J. Am. Chem. Soc. 128 (16): 5462–5467. doi:10.1021/ja0583665.
  4. ↑ R. Chance; A. Prock & R. Silbey (1978). "Molecular Fluorescence and Energy Transfer Near Interfaces". Adv. Chem. Phys. 60: 1. doi:10.1002/9780470142561.ch1.
  5. ↑ Yan Chen et al. (2010). "A Surface Energy Transfer Nanoruler for Measuring Binding Site Distances on Live Cell Surfaces". J. Am. Chem. Soc. 132 (46): 16559–16570. doi:10.1021/ja106360v.