Unlocking the potential of methylparaben detection using surface plasmon resonance enhanced by biowaste-derived carbon quantum dots on gold thin film

2026-08-06

PRE

Nurul Illya Muhamad Fauzi

Yap Wing Fen *

Nurul Huda Osman

Josephine Ying Chyi Liew

Jaafar Abdullah

Hazwani Suhaila Hashim

Muhammad Fahmi Anuar

Faten Bashar Kamal Eddin

Nur Aqilah Kamaruzzaman

Nor Afiqah Nor Asri

Muhammad Amir Zakwan Mohd Zailani

DOI：10.1016/j.optlastec.2026.115972

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• A sustainable SPR sensor was developed using banana-peel-derived CQDs deposited on a gold thin film. • The sensor detected methylparaben down to 1 fM, with a sensitivity of 0.00421 M-1. • CQD film thickness and refractive index changes enhanced resonance-angle shifts and plasmonic performance.

Keywords:

Methylparaben

Surfaceplasmon resonance

Carbon quantum dots

Banana peel

Unlocking the potential of methylparaben detection using surface plasmon resonance enhanced by biowaste-derived carbon quantum dots on gold thin film

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