TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Ashraf, Imran
A1  - Konrad, Alexander
A1  - Lokstein, Heiko
A1  - Skandary, Sepideh
A1  - Metzger, Michael
A1  - Djouda, Joseph
A1  - Maurer, Thomas
A1  - Adam, Pierre-Michel
A1  - Meixner, Alfred
A1  - Brecht, Marc
T1  - Temperature dependence of metal-enhanced fluorescence of photosystem I from Thermosynechococcus elongatus
JF  - Nanoscale
N2  - We report the temperature dependence of metal-enhanced fluorescence (MEF) of individual photosystem I (PSI) complexes from Thermosynechococcus elongatus (T. elongatus) coupled to gold nanoparticles (AuNPs). A strong temperature dependence of shape and intensity of the emission spectra is observed when PSI is coupled to AuNPs. For each temperature, the enhancement factor (EF) is calculated by comparing the intensity of individual AuNP-coupled PSI to the mean intensity of ‘uncoupled’ PSI. At cryogenic temperature (1.6 K) the average EF was 4.3-fold. Upon increasing the temperature to 250 K the EF increases to 84-fold. Single complexes show even higher EFs up to 441.0-fold. At increasing temperatures the different spectral pools of PSI from T. elongatus become distinguishable. These pools are affected differently by the plasmonic interactions and show different enhancements. The remarkable increase of the EFs is explained by a rate model including the temperature dependence of the fluorescence yield of PSI and the spectral overlap between absorption and emission spectra of AuNPs and PSI, respectively.
Y1  - 2017
SN  - 2040-3364
SS  - 2040-3364
U6  - https://doi.org/10.1039/C6NR08762K
DO  - https://doi.org/10.1039/C6NR08762K
VL  - 9
IS  - 12
SP  - 4196
EP  - 4204
S1  - 9
PB  - RSC Publ.
CY  - Cambridge
ER  -