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001-es BibID:	BIBFORM075133
Első szerző:	Bene László (biofizikus)
Cím:	Checkpoint for helicity conservation in fluorescence at the nanoscale : energy and helicity transfer (hFRET) from a rotating donor dipole / László Bene, Miklós Bagdány, László Damjanovich
Dátum:	2018
Megjegyzések:	Orientation factor (?2) for FRET from a rotating donor dipole, transferred helicity of the donor field and torqueexerted on the acceptor by the donor have been investigated in the framework of classical electrodynamics. It isshown that for rotating dipole, ?2 is significantly higher as compared to linear dipole independently of theorientation distribution of the donor and acceptor and whether the static or the dynamic rotational regimes areused for averaging ?2. By this property of ?2, FRET serves as an example for a phenomenon where local fieldinterference may take place in a "natural" way for emitters possessing rotating dipoles in their excited states bynature. The overlapping spatial distributions for the helicity of donor local field, torque exerted on the acceptorby the donor and for the FRET orientational factor suggest that transfer of both energy and helicity take placepredominantly in the plane of rotation by keeping the original direction of helicity, i.e. in accordance with theconservation law for helicity.Orienting FRET has been proposed by engineering local field structure by using elliptically polarized light fordonor excitation or by using linearly polarized light coupled with electromagnetic modification of the donorenvironment. The phenomenon of increased ?2 can be exploited for checking helicity conservation for differentFRET donors without the need for polarized detection optics. Modulation of FRET with changing ellipticity of theexcited donor state might supply structural and dynamical information on the orientational distribution of dyeholdingmatrices even on the surface of living cells, e.g. on the level of cell surface receptor clusters.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban Orientation factor for FRET (?2), Elliptically polarized light, Angular momentum, Torque of local field, Local field interference, Nanoparticle (quantum dot/QD Plasmonic)
Megjelenés:	Biophysical Chemistry. - 239 (2018), p. 38-53. -
További szerzők:	Bagdány Miklós Damjanovich László (1960-) (általános sebész)
Pályázati támogatás:	TÁMOP-4.2.2.A-11/1/KONV-2012-0045 TÁMOP Sebészet Kutatócsoport
Internet cím:	Szerző által megadott URL Intézményi repozitóriumban (DEA) tárolt változat
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