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Surface energy transfer

From Wikipedia, the free encyclopedia
Comparison of energy transfer efficiency between SET and Förster resonance energy transfer (FRET)

Surface energy transfer (SET) is a dipole-surface energy transfer process involving a metallic surface and a molecular dipole.[1]

Formula

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The SET rate follows the inverse of the fourth power of the distance[2]

where

  • is the donor emission lifetime;
  • is the distance between donor-acceptor;
  • is the distance at which SET efficiency decreases to 50% (i.e., equal probability of energy transfer and spontaneous emission).

Efficiency

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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]

Applications

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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]

See also

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References

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  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. PMID 15740151.
  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. PMID 16620118.
  4. ^ R. Chance; A. Prock & R. Silbey (1978). "Molecular Fluorescence and Energy Transfer Near Interfaces". Adv. Chem. Phys. Advances in Chemical Physics. 60: 1. doi:10.1002/9780470142561.ch1. ISBN 978-0-471-03459-9.
  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. PMC 3059229. PMID 21038856.