"Crystal violet as a fluorescent switch-on probe for i-motif: label-fre" by Dik-Lung Ma, Maria Hiu-Tung Kwan et al.
The first application of crystal violet as a selective fluorescent switch-on probe for i-motif DNA has been reported. This interaction has been exploited to develop a label-free DNA-based "OR" logic gate for potassium and hydrogen ions. © 2011 The Royal Society of Chemistry.