RETRACTED: Mercaptoacetic acid capped CdS quantum dots as fluorescence single shot probe for mercury(II)
作者： Masilamany Koneswaran , Ramaier Narayanaswamy
DOI: 10.1016/J.SNB.2008.09.011
关键词:
摘要: Water soluble CdS quantum dots (QDs) have been synthesised using mercaptoacetic acid (MAA) as surface modifying agent through a one step process by safe and low cost materials. These MAA capped QDs are highly stable in aqueous solution strong affinity for mercury ion result of interaction with the functional group present capping agent. This probe is based on characteristic fluorescence quenching functionalised QDs. Under optimum conditions, intensity linearly proportional to concentration range 0.05 x 10(-7) 4.0 M detection limit 4.2 10(-9) M. There no significant wavelength shift fluorescence-quenched signals presence at pH 7.4. Compare organic dyes, these nanoparticles brighter more against photobleaching. The effect common foreign cations oil was examined evaluate selectivity results showed high towards Hg(II) ions, method presented here simple, rapid, inexpensive, sensitive suitable practical application. (C) 2008 Published Elsevier B.V.
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