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Phone Camera Nano-Biosensor Using Mighty Sensitive Transparent Reusable Upconversion Paper.

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ACS Applied Materials & Interfaces
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Summary
This summary is machine-generated.

A novel transparent strip using upconversion nanoparticles (UCNPs) enables sensitive, real-time lycopene detection at 10 nM via smartphone. This reusable sensor offers a highly sensitive, extraction-free alternative for lycopene analysis.

Keywords:
CNC filmUCNPslycopenesensingtomato

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Nanotechnology

Background:

  • Lycopene, a valuable antioxidant, degrades easily, necessitating real-time monitoring.
  • Existing detection methods lack sensitivity or real-time capabilities.

Purpose of the Study:

  • To develop a sensitive, transparent sensor strip for real-time lycopene detection.
  • To utilize upconversion nanoparticles (UCNPs) for enhanced sensing performance.

Main Methods:

  • Fabrication of transparent β-NaYF4 UCNP strips doped with Yb and Tm.
  • Detection of lycopene using UCNP luminescence quenching and smartphone imaging.
  • Characterization of strip hydrophobicity and luminescence recovery.

Main Results:

  • The UCNP strip exhibited intense emission at 475 nm.
  • Achieved a low detection limit of 10 nM for lycopene with high sensitivity.
  • Demonstrated minimal scattering, enhanced hydrophobicity, and reusability with full luminescence recovery.

Conclusions:

  • The developed transparent UCNP strip is a promising tool for sensitive, real-time, and reusable lycopene detection.
  • The sensor offers an extraction-free alternative to traditional chromatographic methods.
  • Smartphone integration facilitates accessible and rapid analysis.