Detection of ascorbic acid using green synthesized AgInS2 quantum dots

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

doi:10.1016/j.matlet.2018.10.155

Detection of ascorbic acid using green synthesized AgInS₂ quantum dots

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

Chemical Sciences

University of Johannesburg

Research output: Contribution to journal › Article › peer-review

47 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	432-435
Number of pages	4
Journal	Materials Letters
Volume	236
DOIs	https://doi.org/10.1016/j.matlet.2018.10.155
Publication status	Published - 1 Feb 2019

Keywords

AgInS
Ascorbic acid
Fluorescent sensor
Green synthesis
Quantum dots

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.matlet.2018.10.155

Cite this

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title = "Detection of ascorbic acid using green synthesized AgInS2 quantum dots",

abstract = "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.",

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AU - Parani, Sundararajan

AU - Oluwafemi, Oluwatobi S.

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AB - 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.

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KW - Ascorbic acid

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