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Visual colorimetric detection of TNT and 2,4-DNT using as-prepared hexaazamacrocycle-capped gold nanoparticles
Manikkavalli Mohan,
Published in
2014
Volume: 6
   
Issue: 1
Pages: 276 - 281
Abstract
The dual role of a hexaazamacrocyclic ligand L in the effective reduction of Au3+ to Au0 and stabilization of the ensuing gold nanoparticles (AuNPs) is successfully demonstrated. The molar ratio of ligand L to Au3+ is found to be very important for the effective stabilization of the AuNPs. The as-prepared amine-capped AuNPs in the instant visual colorimetric detection of the TNT and 2,4-DNT under easy-to-adopt conditions is established. The naked eye detection of the analytes with an instant color change at concentrations as low as 476 fM is observed. Colorimetric analysis supported the detection of TNT and 2,4-DNT using the nanosensor with the LOD of 1.55 × 10-13 ± 2.02 × 10-13 M and 3.79 × 10-13 ± 3.65 × 10-13 M respectively. © 2014 The Royal Society of Chemistry.
About the journal
JournalAnalytical Methods
ISSN17599660
Open AccessNo
Concepts (15)
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    Analytes
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    Color changes
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    Dual role
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    Gold nanoparticle
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    Gold nanoparticles
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    Molar ratio
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    NAKED-EYE DETECTION
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    VISUAL COLORIMETRIC DETECTIONS
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    COLORIMETRIC ANALYSIS
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    Eye protection
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    Gold
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    Ligands
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    Metal nanoparticles
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    Stabilization
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    Explosives detection