Department of Chemistry
Label-free sensing of pH and silver nanoparticles using an “OR” logic gate
Many natural phenomena are associated with the presence of two or more separate variables. We report here an "OR" DNA logic gate based on a luminescent platinum(II) switch-on probe for silver nanoparticles and pH, both of which may be considered putative indicators of pollution. The modulation of metal complex/double-stranded DNA complex phosphorescence by Ag + and H + was used to construct a simple, rapid and label-free method for the label-free detection of pH and nanomolar Ag + ions and nanoparticles in aqueous solutions with high selectivity. © 2012 Elsevier B.V.
Label-free detection, Logic gate, Luminescent probe, Platinum(II) complex, Silver nanoparticle
Source Publication Title
Analytica Chimica Acta
Link to Publisher's Edition
Ma, Dik-Lung, Hong-Zhang He, Victor Pui-Yan Ma, Daniel Shiu-Hin Chan, Ka-Ho Leung, Hai-Jing Zhong, Lihua Lu, Jean-Louis Mergny, and Chung-Hang Leung. "Label-free sensing of pH and silver nanoparticles using an “OR” logic gate." Analytica Chimica Acta 733 (2012): 78-83.