Enhancing Label-Free Biochemical Sensing via Graphene Oxide Layer Deposition on Dual Resonance Peak Long Period Gratings
Kasun P.W. Dissanayake (City University London, TU Delft - Group Groves)
Souvik Ghosh (City University London, University College London)
Leonardo Binetti (Edinburgh Napier University)
Lourdes Alwis (Edinburgh Napier University)
B. M.Azizur Rahman (City University London)
Tong Sun (City University London)
Kenneth T.V. Grattan (City University London)
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Abstract
This research introduces a novel label-free graphene oxide-coated dual-peak long-period grating sensor for measuring protein concentrations. It achieves high sensitivity (22 nm/(g/mL)) and a low limit of detection (0.9 µg/mL), demonstrating extremely high potential for fiber optic biosensor development.