Fig. 8From: Recent advances in M13 bacteriophage-based optical sensing applicationsReprinted with permission from Royal Society of Chemistry © 2016 a Jablonski diagram of FRET process [104]. Reproduced with permission from MDPI AG © 2016, b The schematics for distance (r) dependence of FRET and spectral overlap. c Förster distance and FRET efficiency [105].Back to article page