Label-free optical spectroscopy for characterizing binding properties of highly sensitive nanocrystalline cellulose-graphene oxide based nanocomposite towards nickel ion

Wan Mohd Ebtisyam Mustaqim Mohd Daniyal; Yap Wing Fen; Jaafar Abdullah; Amir Reza Sadrolhosseini; Silvan Saleviter; Nur Alia Sheh Omar

doi:10.1016/j.saa.2018.12.031

Label-free optical spectroscopy for characterizing binding properties of highly sensitive nanocrystalline cellulose-graphene oxide based nanocomposite towards nickel ion

Spectrochim Acta A Mol Biomol Spectrosc. 2019 Apr 5:212:25-31. doi: 10.1016/j.saa.2018.12.031. Epub 2018 Dec 17.

Authors

Wan Mohd Ebtisyam Mustaqim Mohd Daniyal¹, Yap Wing Fen², Jaafar Abdullah³, Amir Reza Sadrolhosseini¹, Silvan Saleviter¹, Nur Alia Sheh Omar¹

Affiliations

¹ Institute of Advanced Technology, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
² Institute of Advanced Technology, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia; Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia. Electronic address: yapwingfen@gmail.com.
³ Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.

PMID: 30594850
DOI: 10.1016/j.saa.2018.12.031

Abstract

Surface plasmon resonance (SPR) is a label-free optical spectroscopy that is widely used for biomolecular interaction analysis. In this work, SPR was used to characterize the binding properties of highly sensitive nanocrystalline cellulose-graphene oxide based nanocomposite (CTA-NCC/GO) towards nickel ion. The formation of CTA-NCC/GO nanocomposite has been confirmed by FT-IR. The SPR analysis result shows that the CTA-NCC/GO has high binding affinity towards Ni²⁺ from 0.01 until 0.1 ppm with binding affinity constant of 1.620 × 10³ M^-1. The sensitivity for the CTA-NCC/GO calculated was 1.509° ppm^-1. The full width at half maximum (FWHM), data accuracy (DA), and signal-to-noise ratio (SNR) have also been determined using the obtained SPR curve. For the FWHM, the value was 2.25° at 0.01 until 0.08 ppm and decreases to 2.12° at 0.1 until 10 ppm. The DA for the SPR curves is the highest at 0.01 until 0.08 ppm and lowest at 0.1 until 10 ppm. The SNR curves mirrors the curves of SPR angle shift where the SNR increases with the Ni²⁺ concentrations. For the selectivity test, the CTA-NCC/GO has the abilities to differentiate Ni²⁺ in the mixture of metal ions.

Keywords: Graphene oxide; Label-free; Nanocrystalline cellulose; Nickel ion; Sensing; Surface plasmon resonance.