Beetle-inspired AuNPs semi-embedded colloidal crystal chips for the highly sensitive and colored detection of chloramphenicol in foods.
Food Chem
; 454: 139650, 2024 Oct 01.
Article
in En
| MEDLINE
| ID: mdl-38788478
ABSTRACT
Inspired by the desert beetle, a novel biomimetic chip was developed to detect chloramphenicol (CP). The chip was characterized by a periodic array in which hydrophobic Au nanoparticles (AuNPs) were semi-embedded on hydrophilic polymethyl methacrylate (PMMA) spheres. Among them, the AuNPs exhibited both a localized surface plasmon resonance effect to amplify the reflected signal and a synergistic effect with PMMA spheres to create a significant hydrophilic-hydrophobic interface, which facilitated the enrichment of target CP molecules and improved sensitivity. After optimization, the chip showed direct, ultrasensitive (as low as 0.2 ng/mL), fast (5 min), and selective detection of CP with a wide concentration range extending from 0.2 ng/mL to 1000 ng/mL. During detection, color changes of the chip were observed by naked eyes without any color display equipment. The recovery of CP was between 94.65 % and 108.70 % in chicken and milk samples.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Coleoptera
/
Food Contamination
/
Chickens
/
Chloramphenicol
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Milk
/
Metal Nanoparticles
/
Gold
Limits:
Animals
Language:
En
Journal:
Food Chem
Year:
2024
Document type:
Article
Country of publication: