Amorphous Carbon Dots and their Remarkable Ability to Detect 2,4,6-Trinitrophenol

Siddique, A B and Pramanick, A K and Chatterjee, S and Ray, M (2018) Amorphous Carbon Dots and their Remarkable Ability to Detect 2,4,6-Trinitrophenol. Scientific Reports, 8 (IF-4.525). p. 9770.

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Apparently mundane, amorphous nanostructures of carbon have optical properties which are as exotic as their crystalline counterparts. In this work we demonstrate a simple and inexpensive mechano-chemical method to prepare bulk quantities of self-passivated, amorphous carbon dots. Like the graphene quantum dots, the water soluble, amorphous carbon dots too, exhibit excitation-dependent photoluminescence with very high quantum yield (~40%). The origin and nature of luminescence in these high entropy nanostructures are well understood in terms of the abundant surface traps. The photoluminescence property of these carbon dots is exploited to detect trace amounts of the nitro-aromatic explosive — 2,4,6-trinitrophenol (TNP). The benign nanostructures can selectively detect TNP over a wide range of concentrations (0.5 to 200 µM) simply by visual inspection, with a detection limit of 0.2 µM, and consequently outperform nearly all reported TNP sensor materials.

Item Type:Article
Official URL/DOI:
Uncontrolled Keywords:amorphous nanostructures of carbon;2,4,6-trinitrophenol (TNP);nanostructures;graphene quantum dots;photoluminescence property
Divisions:Material Science and Technology
ID Code:7825
Deposited By:Sahu A K
Deposited On:20 Sep 2019 10:08
Last Modified:20 Sep 2019 10:08
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