Journal
SENSORS AND MATERIALS
Volume 31, Issue 4, Pages 1147-1156Publisher
MYU, SCIENTIFIC PUBLISHING DIVISION
DOI: 10.18494/SAM.2019.2142
Keywords
surface plasmon resonance; optical properties; graphene oxide; poly(amidoamine) dendrimer
Funding
- Universiti Putra Malaysia (UPM)
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In this study, a graphene oxide/poly(amidoamine) (GO/PAMAM) dendrimer composite thin film was developed for the potential detection of Hg2+ using surface plasmon resonance (SPR) spectroscopy. Fourier transform infrared spectroscopy (FTIR) analysis proved the presence of amino, carboxylic acid, carboxyl, and hydroxyl groups in the GO/PAMAM thin film. The optical properties of the thin film were characterized using UV-Vis absorption spectroscopy. The UV-Vis analysis showed that the absorption of the GO/PAMAM thin film was high with an optical band gap of 4.01 eV. The incorporation of the GO/PAMAM thin film with SPR spectroscopy produced positive responses towards various Hg2+ concentrations. Atomic force microscopy results indicated that the thin film has an irregular edge and hence proved the interaction of mercury ions with the thin film.
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