A novel SPR based Fe@Ag core–shell nanosphere entrapped on starch matrix an optical probe for sensing of mercury(II) ion: A nanomolar detection, wide pH range and real water sample application

Balasurya, S.; Syed, Asad; Swedha, M.; Harini, G.; Elgorban, Abdallah M.; Zaghloul, Nouf S. S.; Das, Arunava; Khan, S. Sudheer

doi:10.1016/j.saa.2021.120204

Cited by 12 publications

(1 citation statement)

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“…Amylose has been used as an end sealer for metal and bimetal nanoparticles. Balasurya et al ( 27 ) developed a novel core-shell Fe@Ag-starch nanosphere phenylalanine conjugate, and determined trace levels (1.84 nmol/L) of Hg 2+ by absorption (Abs) spectrophotometry. Sapyen et al ( 28 ) used SS-capped AgNPs in combination with a colorimetric method to determine trace levels (48 μg/L) of Cr (VI).…”

Section: Introductionmentioning

confidence: 99%

Highly catalytic nanoenzyme of covalent organic framework loaded starch- surface-enhanced Raman scattering/absorption bi-mode peptide as biosensor for ultratrace determination of cadmium

Shu²,

Li³

et al. 2023

Front. Nutr.

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High affinity peptides (PTs) have been used in nanoanalysis, but there are no reports which combine PTs with a liquid crystal (LC) covalent organic framework (COF) supported soluble starch (SS) catalytic amplification system as a biosensor recognition element. In this study, a new, highly sensitive and selective bi-mode molecular biosensor has been developed for the determination of cadmium ion (Cd2+). Specifically, a highly catalytic and stable COF supported SS nanosol catalyst was fabricated such that a nanocatalytic indicator reaction system for HAuCl4-sodium formate was established based on surface-enhanced Raman scattering (SERS). The Au nanoparticles produced exhibited a surface plasmon resonance (SPR) absorption peak at 535 nm and a SERS peak at 1,615 cm–1. Combining the nanocatalytic amplification indicator system with the specific PTs reaction permitted a sensitive and selective SERS/absorption bi-mode platform to be developed for the determination of cadmium in rice. The linear range for SERS determination was 0.025–0.95 nmol/L and the detection limit (DL) was 0.012 nmol/L.

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Section: Introductionmentioning

confidence: 99%