jp9b10347_si_001.pdf (279.32 kB)
Highly Efficient Energy Transfer from Fluorescent Gold Nanoclusters to Organic J‑Aggregates
journal contribution
posted on 2020-02-20, 18:41 authored by Somnath Banerjee, Naupada Preeyanka, Himani Dey, Sudipta Seth, Abdur Rahaman, Moloy SarkarWith
an aim to understand the interaction between the inorganic
and organic components in inorganic–organic hybrid nanostructured
materials, we have designed and developed an inorganic–organic
nanohybrid associate comprising inorganic fluorescent Au nanoclusters
(NCs) and organic J-aggregates of a cyanine-based dye (S2165). The
present system is quite interesting as in contrast to previously constructed
nanohybrid systems where fluorescent quantum dots are integrated with
an organic dye, the present system is developed using fluorescent
gold nanoparticles and organic J-aggregates. The hybrid system has
been characterized by spectroscopic and microscopic techniques. Steady-state
absorption and emission and time-resolved fluorescence measurements
have been performed to understand the optical properties of this hybrid
system. In particular, the interparticle electronic interaction has
been investigated by monitoring nonradiative energy transfer from
fluorescent Au NCs (donor) to organic J-aggregates (acceptor). The
fluorescence resonance energy transfer (FRET) event for the current
system has been verified by various methods. ζ-Potential measurements
and thermodynamic calculations have suggested that the interaction
between Au NCs and J-aggregates in the hybrid associate is electrostatically
driven. The analysis of data based on Förster theory has revealed
that the energy transfer efficiency from inorganic to organic particles
is very high. The observation of the high energy transfer efficiency
in the present inorganic–organic hybrid associate is quite
interesting as these results suggest that a metal-based system can
also be very useful in designing a highly efficient light-harvesting
system for various optoelectronic applications. Interestingly, both
Au NCs and the Au–J-aggregate hybrid system are found to be
cell-permeable and suitable for bioimaging studies. Additionally,
because of the nontoxic nature of these systems, they can also be
used in many biological applications.
History
Usage metrics
Categories
Keywords
monitoring nonradiative energy transferlight-harvesting systemSteady-state absorptionFluorescent Gold Nanoclusterscyanine-based dyeJ-aggregatetime-resolved fluorescence measurementsEfficient Energy TransferNCfluorescence resonance energy transfernanostructured materialsquantum dotsFRETenergy transfer efficiencyoptoelectronic applicationsgold nanoparticlesnanohybrid systemsmetal-based systembioimaging studies
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC