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Biosens Bioelectron. 2018 Oct 15;117:129-137. doi: 10.1016/j.bios.2018.06.004. Epub 2018 Jun 5.

The insight study of SnO pico size particles in an ethanol-water system followed by its biosensing application.

Author information

1
Department of Chemistry and Institute of Basic Science, Chonnam National University, Gwangju 500-757, Republic of Korea.
2
Department of Chemistry and Institute of Basic Science, Chonnam National University, Gwangju 500-757, Republic of Korea. Electronic address: swjeon3380@naver.com.

Abstract

Pico sized Stannous oxide particles (SnO PPs) were synthesized in an ethanol-water solvent system on the surface of nitrogen doped graphene oxide (GO). The highly conductive support was a combination of dual interactions between 4-aminomethylbenzylamine (AMBA) and GO. The oppositely positioned -NH2 linkers of the AMBA were covalently incorporated into the GO matrix through condensation reaction followed by the strong π - π stacking interactions between aromatic rings of AMBA and GO. The change in the local chemical environment of GO via dual interactions provided a suitable atmosphere for the growth and dispersion of SnO PPs on GO-AMBA surface. The possible mechanism for the formation of SnO in an ethanol-water solvent system was evaluated. Furthermore, a light was shed on the factors responsible for the pico size of SnO particles synthesis along with its phenomenal distribution on the GO-AMBA surface. The catalyst containing SnO PPs was deployed as a biosensor for the detection of ascorbic acid (AA) for the very first time. A very wide linear range of 5.0 × 10-5-7.0 × 10-3 M, limit of detection (LOD) of 1.19 × 10-5 M along with excellent practical feasibility, storage stability, repeatability and selectivity towards AA electrooxidation showed the excellent synergy between nitrogen-rich GO surface and SnO PPs. The sensitivity (885.54 µAmM-1cm-2) of the catalyst was the most attractive feature, as it was obtained in the presence of 5 and 2-fold higher concentration of UA and DA interfering species respectively.

KEYWORDS:

4-aminomethylbenzylamine; AA electrooxidation; Covalent and π – π stacking interactions; Ethanol solvent; Graphene oxide; SnO PPs

PMID:
29894849
DOI:
10.1016/j.bios.2018.06.004
[Indexed for MEDLINE]

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