Study of the interaction of β-carbolines with gold nanoparticles and its application to turn-on fluorescence detection of silver ion

Amjadi, Mohammad; Farzampour, Leila; Manzoori, Jamshid L.

doi:10.1016/j.jphotochem.2014.04.011

Cited by 7 publications

(5 citation statements)

References 34 publications

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“…Of perhaps even more importance is the process of excitation energy transfer in a donoracceptor pair, one of the main pathways by which energy transfer occurs at the nanoscale. It plays important roles in biology, [41][42][43][44][45] nanophotonics (LEDs, nanolasers), microscopy, 46,47 sensing, 48 and as optical rulers, [49][50][51] etc. The process is determined by the dipole-dipole interaction between the donor and acceptor and, in the short distance limit, has a r −6 dependence on the donor-acceptor separation r, the above-mentioned FRET regime.…”

Section: Introductionmentioning

confidence: 99%

“…In a variety of applications, it is desirable to extend the FRET regime to larger donor-acceptor separations. This would enhance the efficiency of light-harvesting 53,54 and emitting systems, 55,56 as well as increase the range and accuracy of sensing devices 48 and optical rulers. [49][50][51] One possible way of enhancing the energy transfer rate in a donor-acceptor pair is by introducing a "mediator".…”

Section: Introductionmentioning

confidence: 99%

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A theoretical investigation of the influence of gold nanosphere size on the decay and energy transfer rates and efficiencies of quantum emitters

Marocico

Zhang

Bradley

2016

The Journal of Chemical Physics

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Articles you may be interested inWe present in this contribution a comprehensive investigation of the effect of the size of gold nanospheres on the decay and energy transfer rates of quantum systems placed close to these nanospheres. These phenomena have been investigated before, theoretically and experimentally, but no comprehensive study of the influence of the nanoparticle size on important dependences of the decay and energy transfer rates, such as the dependence on the donor-acceptor spectral overlap and the relative positions of the donor, acceptor, and nanoparticle, exists. As such, different accounts of the energy transfer mechanism have been presented in the literature. We perform an investigation of the energy transfer mechanisms between emitters and gold nanospheres and between donor-acceptor pairs in the presence of the gold nanospheres using a Green's tensor formalism, experimentally verified in our lab. We find that the energy transfer rate to small nanospheres is greatly enhanced, leading to a strong quenching of the emission of the emitter. When the nanosphere size is increased, it acts as an antenna, increasing the emission of the emitter. We also investigate the emission wavelength and intrinsic quantum yield dependence of the energy transfer to the nanosphere. As evidenced from the literature, the energy transfer process between the quantum system and the nanosphere can have a complicated distance dependence, with a r −6 regime, characteristic of the Förster energy transfer mechanism, but also exhibiting other distance dependences. In the case of a donor-acceptor pair of quantum systems in the presence of a gold nanosphere, when the donor couples strongly to the nanosphere, acting as an enhanced dipole; the donor-acceptor energy transfer rate then follows a Förster trend, with an increased Förster radius. The coupling of the acceptor to the nanosphere has a different distance dependence. The angular dependence of the energy transfer efficiency between donor and acceptor exhibits a strong focusing effect and the same enhanced donor-dipole character in different angular arrangements. The spectral overlap of the donor emission and acceptor absorption spectra shows that the energy transfer follows the near-field scattering efficiency, with a red-shift from the localized surface plasmon peak for small sphere sizes. C 2016 AIP Publishing LLC. [http://dx

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A theoretical investigation of the influence of gold nanosphere size on the decay and energy transfer rates and efficiencies of quantum emitters

Marocico

Zhang

Bradley

2016

The Journal of Chemical Physics

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“…Indeed this is a proven fact from the studies reported in the literature. [237][238][239] The correlation between the alteration and the direct changes of emission can generate quantitative information, which has been the basis in the development of novel optical sensors based on FINPs.…”

Section: Direct Uorescencementioning

confidence: 99%

A review on fluorescent inorganic nanoparticles for optical sensing applications

Koneswaran²,

Narayanaswamy

2016

RSC Adv.

140

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“…These NPs are also known to be efficient fluorescence quenchers. Their quenching effect on various fluorophores has been thoroughly explored as have their analytical applications . Several processes can lead to fluorescence quenching, most of which occur during the excited state lifetime, for example, collisional quenching, energy transfer and charge transfer reactions, whereas others take place due to the formation of complexes in the ground state …”

Section: Introductionmentioning

confidence: 99%

Interaction of glucose‐derived carbon quantum dots with silver and gold nanoparticles and its application for the fluorescence detection of 6‐thioguanine

2016

Self Cite

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The interaction of glucose-derived carbon quantum dots (CQDs) with silver (Ag) and gold (Au) nanoparticles (NPs) was explored by fluorescence spectroscopy. Both metal NPs cause an efficient quenching of CQD fluorescence, which is likely due to the energy transfer process between CQDs as donors and metal NPs as acceptors. The Stern-Volmer plots were evaluated and corresponding quenching constants were found to be 1.9 × 10 and 2.2 × 10 M for AgNPs and AuNPs, respectively. The analytical applicability of these systems was demonstrated for turn-on fluorescence detection of the anti-cancer drug, 6-thioguanine. Because the CQD-AgNP system had much higher sensitivity than the CQD-AuNP system, we used it as a selective fluorescence probe in a turn-on assay of 6-thioguanine. Under optimum conditions, the calibration graph was linear from 0.03 to 1.0 μM with a detection limit of 0.01 μM. The developed method was applied to the analysis of human plasma samples with satisfactory results.

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Study of the interaction of β-carbolines with gold nanoparticles and its application to turn-on fluorescence detection of silver ion

Cited by 7 publications

References 34 publications

A theoretical investigation of the influence of gold nanosphere size on the decay and energy transfer rates and efficiencies of quantum emitters

A theoretical investigation of the influence of gold nanosphere size on the decay and energy transfer rates and efficiencies of quantum emitters

A review on fluorescent inorganic nanoparticles for optical sensing applications

Interaction of glucose‐derived carbon quantum dots with silver and gold nanoparticles and its application for the fluorescence detection of 6‐thioguanine

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