Abstract
AbstractThe effect of plasmon resonance of silver island films (SIF) on the interlayer Förster resonance energy transfer (FRET) between xanthene and oxazine dye molecules was studied. It has been shown that the enhancement of FRET can be controlled by changing in the distance between the donor-acceptor system and the SIF. The maximum increase in energy transfer efficiency (EET) by a factor of 2.6 was recorded at a distance of 6 nm from the SIF. The assumption was made that an increase in EET can be associated with both the direct appearance of a plasmon-enhanced rate constant of energy transfer and an increase in the quantum yield of the energy donor in direct contact with the SIF. The results can serve as a basis for studying of photoinduced processes in hybrid materials such as “organic dye-plasmon nanoparticles”, to increase the photosensitivity of solar cells in the visible region of the spectrum, and for the studying of photobiological processes, as well as to create materials with desired properties, sensors and light energy converters.
Highlights
The phenomenon of intermolecular electronic excitation energy transfer is one of the key processes in the transformation of absorbed light into other types of energy and underlies in many important photophysical and photochemical processes [1, 2]
This paper presents the results of a study of the effect of plasmon resonance of silver island films on the interlayer Förster resonance energy transfer (FRET) between xanthene and oxazine dye molecules
That the bands of dyes and silver island films (SIF) overlap with each other, which is a necessary condition for the implementation of the plasmon effect
Summary
The phenomenon of intermolecular electronic excitation energy transfer is one of the key processes in the transformation of absorbed light into other types of energy and underlies in many important photophysical and photochemical processes [1, 2]. [9, 10] it was shown the using of the FRET for studying of photo-induced electron transfer process between organic molecules, which is very important for photovoltaic devices This type of energy transfer can be used to identify the localization and interaction of proteins within cells [11], conformational changes in DNA [12] and etc. Plasmon-enhanced energy transfer between lightemitting molecules allows increasing of the luminescent characteristics of acceptor molecules [13, 14] When the LPR maximum was shifted to the longer wavelength and localized between the peak of the donor’s emission and the acceptor’s absorption peak or to the right of the acceptor’s emission peak, the energy transfer channel can be activated This experimental result confirmed the results of a theoretical study of the energy transfer near a solid particle.
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