Luminescent Core–Shell Imprinted Nanoparticles Engineered for Targeted Förster Resonance Energy Transfer-Based Sensing

2013 ◽  
Vol 85 (11) ◽  
pp. 5316-5320 ◽  
Author(s):  
Ana B. Descalzo ◽  
Clara Somoza ◽  
María C. Moreno-Bondi ◽  
Guillermo Orellana
Keyword(s):  
Energy Transfer ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Forster Resonance Energy Transfer ◽  
Förster Resonance Energy Transfer ◽  
Core Shell ◽  
Förster Resonance

scholarly journals Förster Resonance Energy Transfer between Core/Shell Quantum Dots and Bacteriorhodopsin

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Mark H. Griep ◽  
Eric M. Winder ◽  
Donald R. Lueking ◽  
Gregory A. Garrett ◽  
Shashi P. Karna ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Separation Distance ◽  
Forster Resonance Energy Transfer ◽  
Förster Resonance Energy Transfer ◽  
Core Shell ◽  
Energy Transfer Mechanism ◽  
Förster Resonance

An energy transfer relationship between core-shell CdSe/ZnS quantum dots (QDs) and the optical protein bacteriorhodopsin (bR) is shown, demonstrating a distance-dependent energy transfer with 88.2% and 51.1% of the QD energy being transferred to the bR monomer at separation distances of 3.5 nm and 8.5 nm, respectively. Fluorescence lifetime measurements isolate nonradiative energy transfer, other than optical absorptive mechanisms, with the effective QD excited state lifetime reducing from 18.0 ns to 13.3 ns with bR integration, demonstrating the Förster resonance energy transfer contributes to 26.1% of the transferred QD energy at the 3.5 nm separation distance. The established direct energy transfer mechanism holds the potential to enhance the bR spectral range and sensitivity of energies that the protein can utilize, increasing its subsequent photocurrent generation, a significant potential expansion of the applicability of bR in solar cell, biosensing, biocomputing, optoelectronic, and imaging technologies.

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