Nanoconfinement of pyrene in mesostructured silica nanoparticles for trace detection of TNT in the aqueous phase

Pinar Beyazkilic, Adem Yildirim, Mehmet Bayindir

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

This article describes the preparation of pyrene confined mesostructured silica nanoparticles for the trace detection of trinitrotoluene (TNT) in the aqueous phase. Pyrene confined mesostructured silica nanoparticles were prepared using a facile one-pot method where pyrene molecules were first encapsulated in the hydrophobic parts of cetyltrimethylammonium micelles and then silica polymerized around these micelles. The resulting hybrid particles have sizes of around 75 nm with fairly good size distribution. Also, they are highly dispersible and colloidally stable in water. More importantly, they exhibit bright and highly stable pyrene excimer emission. We demonstrated that excimer emission of the particles exhibits a rapid, sensitive and visual quenching response against TNT. The detection limit for TNT was determined to be 12 nM. Furthermore, excimer emission of pyrene shows significantly high selectivity for TNT. This journal is

Original languageEnglish (US)
Pages (from-to)15203-15209
Number of pages7
JournalNanoscale
Volume6
Issue number24
DOIs
StatePublished - Dec 21 2014

ASJC Scopus subject areas

  • Materials Science(all)

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