Fluorescence Resonance Energy Transfer (FRET) sensor
  The applications of Fluorescence resonance energy transfer (FRET) have expanded tremendously in the last 25 years, and the technique has become a staple technique in many biological and biophysical fields. FRET can be used as spectroscopic ruler in various areas such as structural elucidation of biological molecules and their interactions, in vitro assays, in vivo monitoring in cellular research, nucleic acid analysis, signal transduction, light harvesting, and metallic nanomaterials etc. Based on the mechanism of FRET a variety of novel chemical sensors and Biosensors have been developed. This review highlights the recent applications of sensitive and selective ratiometric FRET based sensors. 
Syed Arshad Hussain, Dibyendu Dey, Sekhar Chakraborty, Jaba Saha,   Arpan Datta Roy, Santanu Chakraborty, Pintu Debnath, D. ...
physics.bio-ph cond-mat.mtrl-sci q-bio.BM