Efficient and sub-nanosecond resonance energy transfer in close-packed films of ZnSe quantum dots by steady-state and time-resolved spectroscopy

2020 ◽  
Vol 138 ◽  
pp. 106382
Author(s):  
N.V. Bondar ◽  
M.S. Brodyn ◽  
N.A. Matveevskaya ◽  
T.G. Beynik
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Steady State ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Time Resolved ◽  
Time Resolved Spectroscopy

Tuning of resonance energy transfer from 4′,6-diamidino-2-phenylindole to an ultrasmall silver nanocluster across the lipid bilayer

2017 ◽  
Vol 19 (40) ◽  
pp. 27305-27312 ◽  
Author(s):  
Jamuna K. Vaishnav ◽  
Tushar Kanti Mukherjee
Keyword(s):  
Energy Transfer ◽  
Steady State ◽  
Fluorescence Spectroscopy ◽  
Lipid Bilayer ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Silver Nanocluster

Liposome mediated efficient tuning of FRET between photoexcited 4′,6-diamidino-2-phenylindole (DAPI) and an ultrasmall silver nanocluster (Ag NC) has been demonstrated using steady-state and time-resolved fluorescence spectroscopy.

Lanthanides to Quantum Dots Resonance Energy Transfer in Time-Resolved Fluoro-Immunoassays and Luminescence Microscopy

2006 ◽  
Vol 128 (39) ◽  
pp. 12800-12809 ◽  
Author(s):  
Loïc J. Charbonnière ◽  
Niko Hildebrandt ◽  
Raymond F. Ziessel ◽  
Hans-Gerd Löhmannsröben
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Time Resolved ◽  
Luminescence Microscopy

scholarly journals Time-Resolved Analysis of a Highly Sensitive Förster Resonance Energy Transfer Immunoassay Using Terbium Complexes as Donors and Quantum Dots as Acceptors

2007 ◽  
Vol 2007 ◽  
pp. 1-6 ◽  
Author(s):  
Niko Hildebrandt ◽  
Loïc J. Charbonnière ◽  
Hans-Gerd Löhmannsröben
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Decay Time ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Luminescence Decay ◽  
Forster Resonance Energy Transfer ◽  
Förster Resonance Energy Transfer ◽  
Time Resolved ◽  
Förster Resonance

CdSe/ZnS core/shell quantum dots (QDs) are used as efficient Förster Resonance Energy Transfer (FRET) acceptors in a time-resolved immunoassays with Tb complexes as donors providing a long-lived luminescence decay. A detailed decay time analysis of the FRET process is presented. QD FRET sensitization is evidenced by a more than 1000-fold increase of the QD luminescence decay time reaching ca. 0.5 milliseconds, the same value to which the Tb donor decay time is quenched due to FRET to the QD acceptors. The FRET system has an extremely large Förster radius of approx. 100 Å and more than 70% FRET efficiency with a mean donor-acceptor distance of ca. 84 Å, confirming the applied biotin-streptavidin binding system. Time-resolved measurement allows for suppression of short-lived emission due to background fluorescence and directly excited QDs. By this means a detection limit of 18 attomol QDs within the immunoassay is accomplished, an improvement of more than two orders of magnitude compared to commercial systems.

Charge and Energy Transfer Between CdSe Quantum Dots and Polyaniline

2016 ◽  
Vol 16 (4) ◽  
pp. 3909-3913 ◽  
Author(s):  
Liang Xu ◽  
Xingbin Huang ◽  
Wenjiang Dai ◽  
Punan Sun ◽  
Xuanlin Chen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Fluorescence Spectra ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Cdse Quantum Dots ◽  
Time Resolved Fluorescence ◽  
Cdse Qds ◽  
Time Resolved ◽  
Two Factors

CdSe quantum dots (QDs) and polyaniline (PAni) were mixed to prepare CdSe QDs/PAni complex. PAni can quench the fluorescence of CdSe QDs. Fluorescence intensity of CdSe QDs/PAni complex is related to the size of CdSe QDs and the concentration of PAni. UV-Vis absorption spectra, fluorescence spectra, time-resolved fluorescence spectroscopy were used to analys the quenching phenomenon. The mechanism of fluorescence quenching is dependent on two factors: on one hand, the Förster resonance energy transfer from CdSe to PAni; on the other hand, PAni can intercept the charge relaxation process of CdSe and lead to the interruption of radiative recombination.

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