AI Article Synopsis
- A new eco-friendly electrochemiluminescence (ECL) sensor using carbon quantum dots (CN QDs) was developed for highly sensitive detection of vitamin K (VK).
- The sensor combined nickel-cobalt nanocages (NiCo NCs) with CN QDs, enhancing luminescent properties and allowing for efficient signal amplification when applied to a poly-L-cysteine film.
- It demonstrated a detection range for VK between 1.0 × 10⁻⁸ to 5.0 × 10⁻⁴ mol/L, with a low limit of detection at 1.65 × 10⁻⁹ mol/L, and showed effective recoveries in food samples, indicating its practical application.
Article Abstract
A novel electrochemiluminescence (ECL) sensor based on eco-friendly CN QDs was constructed for the ultrasensitive detection of VK. The synthesized NiCo nanocages (NiCo NCs) with large specific surface area and high catalytic activity were used to effectively load CN QDs, forming the nanocomposites (NiCo NCs@CN QDs) with good luminescent properties. After grafting NiCo NCs@CN QDs onto poly-L-cysteine film, the ECL system achieved multiple signal amplification, which was due to the fact that poly-L-cysteine as a co-reactant accelerator sped up the generation of more SO from SO. Under the optimal conditions, the ECL sensor exhibited a wide detection range for VK from 1.0 × 10 to 5.0 × 10 mol/L and a low detection limit of 1.65 × 10 mol/L. Furthermore, the spiked recoveries in milk, apples, and celery were in the range of 83.50 %-105.32 %, proving the feasibility of the prepared ECL sensor in actual sample detection.
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| http://dx.doi.org/10.1016/j.foodchem.2025.142775 | DOI Listing |
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