Our Manuscript entitle:  Selective ultrasensitive optical fiber nanosensors based on plasmon resonance energy transfer by J. Barroso, A. Ortega-Gomez, A. Calatayud-Sánchez, J. Zubia, F. Benito-Lopez, J. Villatoro and L. Basabe-Desmonts publishe in ACS Sensors, 2020, 5, 2018-2024 got the front cover of the issue.

COVER: Ultrasensitive optical nanosensors based on plasmon resonance energy transfer by immobilization of functionalized gold nanoparticles on the end face of a multimode optical fiber are presented