Detection of ascorbic acid using green synthesized AgInS2 quantum dots

Bambesiwe M.M. May, Sundararajan Parani, Oluwatobi S. Oluwafemi

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)


We herein report green synthesis of water-soluble AgInS2 (AIS) quantum dots (QDs) for the detection of ascorbic acid (AA). The optical analysis showed that addition of AA increased the photoluminescence (PL) intensity of the QDs by suppressing the surface defects via the chelating action of AA. The relationship between the PL intensity and AA concentration was found to be linear over a range of 0.66 μM–99 μM. The AIS QDs exhibited excellent limit of detection (LOD = 26 nM) and can be employed as optical sensor for rapid detection of AA in aqueous solutions.

Original languageEnglish
Pages (from-to)432-435
Number of pages4
JournalMaterials Letters
Publication statusPublished - 1 Feb 2019


  • AgInS
  • Ascorbic acid
  • Fluorescent sensor
  • Green synthesis
  • Quantum dots

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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