Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1237707 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2008 | 6 Pages |
Abstract
CdSe quantum dots (QDs) were synthesized in oleic acid and octadecene medium under high-temperature and dispersed in chloroform. Nitroaromatic explosives and their relative compounds, 2,4,6-trinitrotoluene (TNT), 2,4-dinitrotoluene (DNT), nitrobenzene (NB), 2,4-dinitrochlorobenzene (DNBCl) and p-nitrotoluene (NT) can obviously cause the fluorescence quenching of the synthesized QDs. Under the optimum conditions, a nonlinear response was observed over the concentration range of 10−8 to 10−5 M for them all. The modified Stern–Volmer quenching equations of ln I0/I versus C show a good linear relation in 10−5 M order of magnitude, and the detection limits approach 10−6 to 10−7 M.
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Authors
Guo Hua Shi, Zhuo Bin Shang, Yu Wang, Wei Jun Jin, Tian Cai Zhang,